# Product Requirements Document (PRD) - Angular Clarity Boilerplate

## 1. Product Vision

To provide a robust, scalable, and feature-rich boilerplate that serves as a foundational template for building modern, enterprise-grade web applications using Angular and the VMware Clarity Design System. The vision is to accelerate the development lifecycle by offering a pre-configured, best-practice project structure.

## 2. Target Audience

The primary target audience consists of **Angular developers and development teams** who require a standardized, efficient, and consistent starting point for new projects. This includes:

* **Enterprise Development Teams:** Teams that need to maintain a consistent look and feel across multiple applications.
* **Independent Developers:** Individuals looking to quickly bootstrap new projects without spending significant time on initial setup and configuration.

## 3. User Stories (Developer Stories)

### User Story 1: Quick Project Initialization
- **As a developer, I want to clone the repository and run `npm install` and `ng serve` to get a live development server running, so that I can bypass manual setup and start building features immediately.**
- **Acceptance Criteria:**
    - Given I have Node.js and Angular CLI installed,
    - When I clone the repository, install dependencies, and run the start command,
    - Then the application compiles successfully and is accessible in my browser at `localhost:4200`.

### User Story 2: Add a New Feature
- **As a developer, I want to create a new lazy-loaded feature module with its own components and routing, so that I can add new sections to the application in a scalable way.**
- **Acceptance Criteria:**
    - Given the boilerplate is running,
    - When I use the Angular CLI to generate a new module and add it to the main routing configuration,
    - Then I can navigate to the new feature's route, and its components are rendered correctly.

### User Story 3: Utilize Shared Components
- **As a developer, I want to use a component from the `SharedModule` within a new feature module, so that I can reuse common UI elements and maintain consistency.**
- **Acceptance Criteria:**
    - Given I have a new feature module,
    - When I import the `SharedModule` into my feature module,
    - Then I can use the shared components (e.g., a custom card or loader) in my feature's templates without errors.

## 4. Functional Requirements

- **FR-001: Pre-configured Angular Environment:** A ready-to-use Angular CLI project with all necessary dependencies and build configurations.
- **FR-002: Clarity Design System Integration:** Full integration of Clarity UI components and styles, ready for immediate use.
- **FR-003: Scalable Architecture:** A modular structure featuring a `CoreModule` for singleton services and a `SharedModule` for reusable UI components, directives, and pipes.
- **FR-004: Responsive Layout:** A default application shell with a responsive header, navigation sidebar, and main content area.
- **FR-005: Routing:** A pre-configured routing module with examples of lazy-loaded feature modules.
- **FR-006: Theming:** Basic support for Clarity's light and dark themes.

## 5. Non-Functional Requirements

- **NFR-001: Performance:** The initial boilerplate should be lightweight, ensuring fast development server startup times and optimized production builds.
- **NFR-002: Usability (Developer Experience):** The codebase must be clean, well-commented, and logically organized to provide an excellent developer experience.
- **NFR-003: Maintainability:** The modular architecture must facilitate easy updates to dependencies and allow for the addition of new features without introducing breaking changes to the core structure.
- **NFR-004: Scalability:** The architecture is designed to support the growth of large, enterprise-scale applications.
- **NFR-005: Extensibility:** The boilerplate should be easy to customize and extend with additional libraries, modules, and configurations as per project-specific needs.

## 6. Out of Scope

The following features and functionalities are explicitly out of scope for the boilerplate:

-   **Backend Implementation:** This is a frontend-only boilerplate and does not include any backend code or database.
-   **Authentication/Authorization Logic:** While the architecture supports the implementation of security features, no pre-built authentication or authorization logic is included.
-   **State Management:** The boilerplate does not include a state management library (e.g., NgRx, Akita) by default, allowing developers to choose the best solution for their needs.
-   **Business Logic:** No specific business logic or application features are included beyond the basic structural components.
-   **CI/CD Pipelines:** While the project is ready for CI/CD, no pre-configured pipelines are included.

---

## PRD UPDATE - 2025-10-15 12:39:48

# Product Requirements Document (PRD)

## 1. Executive Summary
This document outlines the requirements for transforming the existing Angular Clarity Boilerplate into a robust and scalable E-commerce Application. The primary goal is to deliver a comprehensive online shopping experience for customers, alongside an efficient administrative panel for managing products, orders, and users. This project leverages the pre-established frontend architecture with Angular and Clarity Design System, integrating it with a new Python Django backend. The application aims to provide a seamless user experience, reliable backend operations, and a strong foundation for future growth.

## 2. Product Vision & Strategy
**Product Vision:** To be the go-to, user-friendly e-commerce platform that empowers businesses to easily manage their online presence and provides customers with a seamless, secure, and intuitive shopping experience.

**Strategic Goals:**
-   **Accelerated Market Entry:** Rapidly deploy a functional e-commerce platform leveraging existing boilerplate.
-   **Superior User Experience:** Deliver an intuitive and responsive interface for both shoppers and administrators.
-   **Operational Efficiency:** Provide powerful tools for administrators to manage store operations effectively.
-   **Scalability & Maintainability:** Build an architecture capable of supporting future feature growth and increased traffic.
-   **Security & Reliability:** Ensure secure transactions and data protection for all users.

**Success Metrics:**
-   **Conversion Rate:** Percentage of website visitors who complete a purchase.
-   **Average Order Value (AOV):** Average monetary value of each order.
-   **Admin Task Completion Time:** Time taken for administrators to perform key tasks (e.g., add product, update order status).
-   **Customer Satisfaction (CSAT):** Measured through surveys or feedback mechanisms.
-   **Website Performance:** Page load times, responsiveness (Core Web Vitals).
-   **System Uptime:** Percentage of time the application is operational and accessible.

## 3. Target Users & Personas

### Persona 1: Sarah, The Savvy Shopper
-   **Demographics:** 25-45 years old, tech-literate, uses mobile and desktop, budget-conscious but values quality.
-   **Goals:** Find specific products quickly, discover new items, enjoy a smooth checkout process, track orders easily, feel secure about her payment information.
-   **Pain Points:** Slow loading pages, complicated navigation, unclear product descriptions, long checkout forms, lack of order visibility.
-   **Needs:** Intuitive search & filtering, clear product images/details, secure and fast checkout, real-time order status updates, personalized recommendations.

### Persona 2: Mark, The Store Administrator
-   **Demographics:** 30-55 years old, manages online store operations, values efficiency and control.
-   **Goals:** Efficiently manage product catalog (add, edit, delete), process and track customer orders, monitor inventory, manage customer accounts, access performance reports.
-   **Pain Points:** Cumbersome backend interfaces, difficult to update product information, manual order tracking, lack of visibility into system activity.
-   **Needs:** User-friendly admin dashboard, robust CRUD operations for products/orders/users, clear reporting, audit trails of critical actions.

### Persona 3: Emily, The Business Owner
-   **Demographics:** 35-60 years old, focuses on business growth, ROI, and strategic direction.
-   **Goals:** Grow sales, expand market share, ensure operational efficiency, maintain brand reputation, ensure system scalability and security.
-   **Pain Points:** High operational costs, security breaches, system downtime, difficulty scaling during peak seasons, lack of insights into business performance.
-   **Needs:** Reliable and secure platform, scalable infrastructure, actionable business analytics, cost-effective operations, strong brand presence.

## 4. Problem Statement
The current Angular Clarity Boilerplate provides a robust frontend foundation but lacks the specific functionalities required for a complete e-commerce experience, both for end-users seeking to purchase products and for administrators needing to manage store operations efficiently. The absence of a backend, product catalog management, shopping cart, checkout process, and secure user/admin roles creates a significant gap between the boilerplate's potential and a viable e-commerce solution. This project addresses the need to bridge this gap by integrating a powerful backend and developing all necessary e-commerce features within the existing architectural framework.

## 5. Solution Overview
The solution involves building a full-stack e-commerce application. The frontend will extend the Angular Clarity Boilerplate to include customer-facing features like product browsing, search, shopping cart, and a secure checkout flow, as well as a dedicated, role-protected administrator interface. The backend will be developed using Python Django, providing RESTful APIs for product management, order processing, user authentication and authorization (with RBAC), and an audit logging mechanism. A PostgreSQL database will handle data persistence, with Redis for caching, all deployed on AWS using Docker containers for scalability and reliability.

## 6. Functional Requirements

### 6.1. Public (Shopper) Facing Features
-   **FR-001: Product Catalog Browsing:** Users can browse products by category, view all products, and see featured products.
-   **FR-002: Product Search & Filter:** Users can search for products by keywords and filter results by price range, category, and other attributes.
-   **FR-003: Product Detail View:** Users can view detailed information for each product, including descriptions, images, price, stock availability, and related products.
-   **FR-004: Shopping Cart Management:** Users can add/remove products from a shopping cart, update quantities, and view cart totals.
-   **FR-005: User Authentication:** Users can register new accounts, log in, and log out securely.
-   **FR-006: User Profile Management:** Authenticated users can view and update their profile details and shipping addresses.
-   **FR-007: Order Placement:** Authenticated users can proceed to checkout, provide shipping details, select payment method, and place an order.
-   **FR-008: Order History & Tracking:** Authenticated users can view their past orders and track the status of current orders.

### 6.2. Admin Facing Features
-   **FR-009: Admin Product Management:** Administrators can perform CRUD (Create, Read, Update, Delete) operations on products, including managing details, images, prices, stock, and categories. (Derived from `analysis_document.md` update)
-   **FR-010: Admin Order Management:** Administrators can view, search, filter, and update the status of customer orders. (Derived from `analysis_document.md` update)
-   **FR-011: Admin User Management:** Administrators can view, search, and manage customer accounts, including assigning roles. (Derived from `analysis_document.md` update)
-   **FR-012: Audit Logging View:** Administrators can view a log of all critical administrative actions performed within the system.

## 7. Non-Functional Requirements

-   **NFR-001: Performance:**
    -   Page load times for public-facing pages <= 2 seconds on a typical broadband connection.
    -   API response times for critical operations (e.g., product search, add to cart) <= 500ms under normal load.
    -   Backend operations (e.g., order creation) complete within 1 second.
-   **NFR-002: Security:**
    -   All data transmission between frontend and backend must use HTTPS.
    -   User passwords must be securely hashed and salted.
    -   Role-Based Access Control (RBAC) must enforce access restrictions for admin functionalities.
    -   Integration with PCI DSS compliant third-party payment gateway; no sensitive card data stored by the application.
    -   Protection against common web vulnerabilities (XSS, SQL Injection, CSRF).
    -   Implement rate limiting on authentication endpoints.
    -   Implement JWT token refresh mechanism.
-   **NFR-003: Scalability:**
    -   The system must be capable of handling at least 100 concurrent users without significant performance degradation.
    -   The architecture must support horizontal scaling of backend services and database read replicas.
    -   Caching mechanisms (Redis) must be implemented for read-heavy operations.
    -   Asynchronous task processing (Celery) for non-critical, time-consuming tasks.
-   **NFR-004: Maintainability:**
    -   Codebase must be modular, well-documented, and adhere to established coding standards (ESLint, Black, Flake8).
    -   Automated tests (unit, integration, E2E) must cover critical functionalities.
    -   Database schema migrations must be managed (Alembic).
-   **NFR-005: Usability (Developer Experience):**
    -   The Angular Clarity Boilerplate's structure must remain clear and extensible for feature development.
    -   Backend API documentation (OpenAPI/Swagger) must be comprehensive and up-to-date.
-   **NFR-006: Auditability:** All critical administrative actions (e.g., product update, order status change, user role modification) must be logged with details including user, action, entity, and timestamp. (Derived from `analysis_document.md` update).
-   **NFR-007: Reliability:** Critical backend operations (e.g., order creation) must be idempotent to prevent duplicate processing. Error handling must be robust and provide clear feedback.
-   **NFR-008: Extensibility:** The application should be designed to easily integrate with third-party services (e.g., analytics, marketing automation, new payment gateways).

## 8. Epic Stories

### Epic 1: Product Catalog & Search
**Epic Description:** Enable shoppers to discover products through browsing, searching, and filtering, with clear product information.
**Business Value:** Increases product visibility, improves conversion rates by making products easy to find and understand.
**Acceptance Criteria:** Shoppers can find and view product details, including images, prices, and descriptions.

**User Stories:**
-   **US-001:** Browse Products by Category
    -   **As a** shopper
    -   **I want to** browse products organized by categories
    -   **So that** I can easily explore different types of products available
    -   **Acceptance Criteria:**
        -   [ ] Categories are displayed on the website.
        -   [ ] Clicking on a category displays a list of products belonging to that category.
        -   [ ] Each product in the list shows its name, a small image, and price.
    -   **Story Points:** 5
    **Priority:** High
-   **US-002:** Search Products by Keyword
    -   **As a** shopper
    -   **I want to** search for products using keywords
    -   **So that** I can quickly find specific items I'm looking for
    -   **Acceptance Criteria:**
        -   [ ] A search bar is prominent on the site.
        -   [ ] Entering keywords and submitting the search displays relevant products.
        -   [ ] Search results are displayed with product name, image, and price.
    -   **Story Points:** 8
    **Priority:** High
-   **US-003:** View Product Details
    -   **As a** shopper
    -   **I want to** view comprehensive details of a specific product
    -   **So that** I can make an informed purchasing decision
    -   **Acceptance Criteria:**
        -   [ ] Clicking on a product displays a dedicated product detail page.
        -   [ ] The page includes large images, full description, price, available stock, and options to add to cart.
        -   [ ] Related products (if any) are suggested.
    -   **Story Points:** 8
    **Priority:** High

### Epic 2: Shopping Cart & Checkout
**Epic Description:** Allow shoppers to collect desired products, review their selection, and complete a secure purchase.
**Business Value:** Essential for converting interest into sales, provides a clear path to purchase, and ensures secure transactions.
**Acceptance Criteria:** Shoppers can add items to a cart, modify quantities, proceed through a secure checkout, and place an order.

**User Stories:**
-   **US-004:** Add Product to Cart
    -   **As a** shopper
    -   **I want to** add a desired product to my shopping cart
    -   **So that** I can collect multiple items before purchasing
    -   **Acceptance Criteria:**
        -   [ ] A button to "Add to Cart" is present on product detail pages.
        -   [ ] Clicking "Add to Cart" with a valid quantity adds the item to the cart.
        -   [ ] The cart icon (if visible) updates to reflect the new item count.
    -   **Story Points:** 5
    **Priority:** High
-   **US-005:** Manage Shopping Cart
    -   **As a** shopper
    -   **I want to** view and modify the contents of my shopping cart
    -   **So that** I can review my selection and adjust quantities before checkout
    -   **Acceptance Criteria:**
        -   [ ] A dedicated "Shopping Cart" page displays all added items with their quantities and individual/total prices.
        -   [ ] I can increase or decrease item quantities.
        -   [ ] I can remove items from the cart.
        -   [ ] The total price of the cart updates dynamically.
    -   **Story Points:** 5
    **Priority:** High
-   **US-006:** Complete Secure Checkout
    -   **As a** shopper
    -   **I want to** proceed through a secure checkout process and place my order
    -   **So that** I can finalize my purchase with confidence
    -   **Acceptance Criteria:**
        -   [ ] A "Proceed to Checkout" button is available in the cart.
        -   [ ] The checkout process guides me through shipping address, payment method, and order review steps.
        -   [ ] Payment is processed via a third-party gateway (e.g., Stripe/PayPal).
        -   [ ] Upon successful payment, an order confirmation is displayed, and an email is sent.
    -   **Story Points:** 13
    **Priority:** High

### Epic 3: User Account & Profile
**Epic Description:** Provide shoppers with personalized account management, order history, and profile updates.
**Business Value:** Enhances user loyalty, provides convenience, and supports customer service.
**Acceptance Criteria:** Shoppers can create an account, log in, manage their profile and addresses, and view their past orders.

**User Stories:**
-   **US-007:** Register for an Account
    -   **As a** new shopper
    -   **I want to** create a new user account
    -   **So that** I can save my details and view my order history
    -   **Acceptance Criteria:**
        -   [ ] A clear "Register" option is available.
        -   [ ] The registration form collects necessary details (email, password, name).
        -   [ ] Upon successful registration, I am logged in or prompted to log in.
    -   **Story Points:** 5
    **Priority:** High
-   **US-008:** View Order History
    -   **As a** logged-in shopper
    -   **I want to** view a list of all my past orders
    -   **So that** I can keep track of my purchases and re-order if needed
    -   **Acceptance Criteria:**
        -   [ ] A "My Orders" section is accessible from my account dashboard.
        -   [ ] This section displays a list of orders with their date, total, and current status.
        -   [ ] Clicking on an order shows full details (items, shipping, payment status).
    -   **Story Points:** 8
    **Priority:** High
-   **US-009:** Manage Shipping Addresses
    -   **As a** logged-in shopper
    -   **I want to** add, edit, or remove my shipping addresses
    -   **So that** I can easily select preferred addresses during checkout
    -   **Acceptance Criteria:**
        -   [ ] A "My Addresses" section is available in the user profile.
        -   [ ] I can add a new shipping address.
        -   [ ] I can edit an existing address.
        -   [ ] I can mark an address as default.
    -   **Story Points:** 8
    **Priority:** Medium

### Epic 4: Admin Product & Category Management
**Epic Description:** Enable administrators to efficiently manage the entire product catalog, including categories and inventory.
**Business Value:** Ensures accurate product data, supports sales, and maintains inventory control.
**Acceptance Criteria:** Administrators can perform full CRUD operations on products and categories.

**User Stories:**
-   **US-010:** Add New Product
    -   **As an** Administrator
    -   **I want to** add a new product to the catalog, including all details and initial stock
    -   **So that** the product is available for customers to browse and purchase
    -   **Acceptance Criteria:**
        -   [ ] I can access a "Add New Product" form in the Admin panel.
        -   [ ] The form allows input for name, description, price, stock, category, images, and active status.
        -   [ ] After saving, the product appears in the public catalog and admin listings.
    -   **Story Points:** 8
    **Priority:** High
-   **US-011:** Edit Existing Product
    -   **As an** Administrator
    -   **I want to** modify details of an existing product
    -   **So that** I can keep product information and inventory up-to-date
    -   **Acceptance Criteria:**
        -   [ ] I can select a product from the admin product list and open an edit form.
        -   [ ] I can change any product attribute (e.g., price, stock quantity, description).
        -   [ ] Changes are reflected immediately on the public website.
    -   **Story Points:** 5
    **Priority:** High
-   **US-012:** Manage Product Categories
    -   **As an** Administrator
    -   **I want to** create, edit, and delete product categories
    -   **So that** the product catalog is logically organized for shoppers
    -   **Acceptance Criteria:**
        -   [ ] A dedicated section for "Category Management" exists in the Admin panel.
        -   [ ] I can add a new category with a name and description.
        -   [ ] I can modify an existing category's details.
        -   [ ] I can delete a category (with appropriate warning if products are linked).
    -   **Story Points:** 8
    **Priority:** Medium

### Epic 5: Admin Order Management
**Epic Description:** Enable administrators to efficiently view, track, and update customer orders.
**Business Value:** Streamlines order fulfillment, improves customer service, and provides insights into sales operations.
**Acceptance Criteria:** Administrators can manage the lifecycle of customer orders.

**User Stories:**
-   **US-013:** View All Orders
    -   **As an** Administrator
    -   **I want to** view a comprehensive list of all customer orders
    -   **So that** I can monitor sales activity and identify orders requiring action
    -   **Acceptance Criteria:**
        -   [ ] A "Order List" page is accessible in the Admin panel.
        -   [ ] The list displays key order information (ID, customer, date, total, status).
        -   [ ] I can sort and filter orders by status, date, or customer.
    -   **Story Points:** 8
    **Priority:** High
-   **US-014:** Update Order Status
    -   **As an** Administrator
    -   **I want to** change the status of a customer order (e.g., to 'shipped', 'delivered')
    -   **So that** I can track fulfillment progress and inform customers
    -   **Acceptance Criteria:**
        -   [ ] On an individual order detail page in Admin, I can select a new valid status.
        -   [ ] Upon saving, the order's status is updated in the database.
        -   [ ] An automated email notification is sent to the customer with the status change.
    -   **Story Points:** 8
    **Priority:** High
-   **US-015:** View Detailed Order Information
    -   **As an** Administrator
    -   **I want to** view all details for a specific order
    -   **So that** I can accurately process, ship, or address customer inquiries
    -   **Acceptance Criteria:**
        -   [ ] Clicking on an order in the order list navigates to a detailed view.
        -   [ ] The detailed view includes customer information, shipping address, order items, quantities, prices, payment status, and order history.
    -   **Story Points:** 5
    **Priority:** Medium

### Epic 6: Admin User & Audit Management
**Epic Description:** Provide tools for administrators to manage user accounts and review system activity.
**Business Value:** Ensures data integrity, supports customer accounts, and provides accountability for administrative actions.
**Acceptance Criteria:** Administrators can manage user roles and view system audit logs.

**User Stories:**
-   **US-016:** Manage Customer Accounts
    -   **As an** Administrator
    -   **I want to** view and manage customer user accounts
    -   **So that** I can provide support or update user roles
    -   **Acceptance Criteria:**
        -   [ ] A "User Management" section is available in the Admin panel.
        -   [ ] I can view a list of registered users.
        -   [ ] I can view details of a specific user.
        -   [ ] I can change a user's role (e.g., from customer to administrator).
    -   **Story Points:** 8
    **Priority:** Medium
-   **US-017:** View Audit Logs
    -   **As an** Administrator
    -   **I want to** review a log of all critical administrative actions
    -   **So that** I can ensure accountability and track changes within the system
    -   **Acceptance Criteria:**
        -   [ ] An "Audit Log" section is accessible in the Admin panel.
        -   [ ] The log displays entries with timestamp, administrator, action performed, and affected entity.
        -   [ ] The log can be filtered by administrator, action type, or date range.
    -   **Story Points:** 8
    **Priority:** Medium

## 9. User Interface Requirements
-   **UI/UX Consistency:** Adherence to the VMware Clarity Design System for all UI components, patterns, and visual styles to ensure a consistent and professional look and feel.
-   **Responsiveness:** The application must be fully responsive, providing an optimal viewing and interaction experience across various devices (desktops, tablets, mobile phones).
-   **Intuitive Navigation:** Clear and consistent navigation menus for both the public-facing store and the administrator panel, ensuring users can easily find what they need.
-   **Accessibility:** Design and implement with WCAG 2.1 AA compliance in mind for keyboard navigation, screen reader compatibility, and clear focus states.
-   **Feedback Mechanisms:** Provide clear visual feedback for user actions (e.g., loading indicators, success messages, error alerts, form validation messages).
-   **Wireframes/Mockups:** Initial wireframes and mockups will be created to visualize key user flows and screen layouts before full development.

## 10. Technical Requirements
-   **Frontend (Angular Clarity):**
    -   Modular architecture leveraging `CoreModule`, `SharedModule`, and feature-specific lazy-loaded modules (AuthModule, ProductCatalogModule, CartModule, CheckoutModule, UserProfileModule, AdminModule).
    -   State management via Angular Services with RxJS, potentially NgRx for complex global state.
    -   Secure communication with backend via Angular's `HttpClient` and `HttpInterceptor` for JWT handling.
    -   Environment-specific configurations for API endpoints.
-   **Backend (Python Django/DRF):**
    -   RESTful API endpoints following a clear versioning scheme (`/api/v1/...`).
    -   Robust input validation using Django REST Framework serializers and Pydantic (if FastAPI was chosen, but Django is chosen as per tech stack update).
    -   JWT-based authentication and Role-Based Access Control (RBAC) middleware for API protection.
    -   Object-Relational Mapping (ORM) using Django's ORM for database interactions.
    -   Error responses will follow a consistent JSON structure.
    -   All list endpoints will support pagination, filtering, and sorting.
    -   Utilize Django's built-in Admin for rapid development of administrative interfaces.
-   **Database (PostgreSQL):**
    -   Schema defined in `architecture_document.md` (Users, Products, Categories, Orders, OrderItems, ShippingAddresses, AuditLogs).
    -   Indexes on primary keys, foreign keys, and frequently queried fields (`email`, `product_name`, `order_date`, `status`).
    -   Alembic for managing database migrations (if not using Django's built-in migrations, but Django is mentioned).
-   **Caching (Redis):**
    -   Implement cache-aside pattern for frequently accessed, less volatile data (e.g., product listings, categories).
-   **Security:**
    -   HTTPS for all network traffic.
    -   Password hashing (bcrypt).
    -   Rate limiting on critical endpoints.
    -   Third-party payment gateway for sensitive transactions.
    -   OWASP Top 10 protections.
-   **Deployment & Operations:**
    -   Containerization using Docker for both frontend and backend.
    -   CI/CD pipeline (GitHub Actions/GitLab CI) for automated builds, tests, and deployments to AWS.
    -   AWS services for hosting (EC2, RDS, S3, ALB, SES).
    -   Centralized logging and monitoring (AWS CloudWatch).
    -   Asynchronous task queue (Celery/RabbitMQ) for background tasks (e.g., email notifications).

## 11. Success Metrics & KPIs
-   **User Acquisition:** Number of new user registrations per month.
-   **Sales Performance:** Total revenue, average order value, conversion rate.
-   **Operational Efficiency:** Time to fulfill an order, number of admin tasks automated.
-   **Customer Engagement:** Repeat purchase rate, average session duration.
-   **Technical Performance:** API response times, page load times, system uptime.
-   **Feature Adoption:** Usage rate of specific new features (e.g., search filters, admin product update).

## 12. Risk Assessment
-   **R-001: Integration Complexity (High):** Integrating a new Django backend with an existing Angular frontend boilerplate, especially with authentication and data models.
    -   **Mitigation:** Define clear API contracts, use mock APIs for parallel development, incremental integration, dedicated integration testing phase.
-   **R-002: Security Vulnerabilities (High):** E-commerce applications are high-value targets for cyberattacks.
    -   **Mitigation:** Adhere strictly to NFR-002, use secure coding practices, regular security audits, leverage established frameworks (Django, DRF) for security features, utilize PCI-compliant third-party for payments.
-   **R-003: Performance Bottlenecks (Medium):** Database and API performance under load, especially during peak seasons.
    -   **Mitigation:** Implement caching (Redis), database indexing, query optimization, horizontal scaling of backend, asynchronous processing for heavy tasks, performance testing (load testing).
-   **R-004: Scope Creep (Medium):** Tendency to add more features than initially planned for MVP.
    -   **Mitigation:** Strict adherence to MVP definition, clear PRD, rigorous prioritization, frequent stakeholder communication, and "parking lot" for future ideas.
-   **R-005: Third-Party Dependency Issues (Medium):** Reliance on payment gateways, shipping APIs, etc.
    -   **Mitigation:** Select reputable providers, implement robust error handling and fallback mechanisms, monitor third-party service status.
-   **R-006: User Adoption (Medium):** Users might find the new system difficult or prefer existing solutions.
    -   **Mitigation:** Focus on intuitive UI/UX, gather early user feedback, provide clear onboarding and support.

## 13. Timeline & Milestones
-   **Phase 1: Foundation & Core Development (Weeks 1-8)**
    -   **Milestone 1.1:** PRD & Project Plan Finalized (Week 2)
    -   **Milestone 1.2:** Core Backend APIs (Auth, User, Product) Developed & Tested (Week 5)
    -   **Milestone 1.3:** Frontend Boilerplate Integrated with Core Backend (Product Catalog, Auth UI) (Week 8)
-   **Phase 2: MVP Feature Expansion & Admin (Weeks 9-16)**
    -   **Milestone 2.1:** Shopping Cart & Checkout Flow Complete (Week 12)
    -   **Milestone 2.2:** Admin Product Management Feature Complete (Week 14)
    -   **Milestone 2.3:** MVP User Stories Complete & Initial Testing (Week 16)
-   **Phase 3: Operational Enhancements & Optimization (Weeks 17-24)**
    -   **Milestone 3.1:** Admin Order & User Management Complete (Week 20)
    -   **Milestone 3.2:** Audit Logging & Reporting Tools (Week 22)
    -   **Milestone 3.3:** Performance Tuning, Security Audit, E2E Testing (Week 24)
-   **Phase 4: Launch & Post-Launch (Week 25 onwards)**
    -   **Milestone 4.1:** Production Deployment (Week 25)
    -   **Milestone 4.2:** Post-Launch Monitoring & Feedback Loop (Ongoing)

## 14. Dependencies & Assumptions

**Dependencies:**
-   Availability of experienced Angular and Python/Django developers.
-   Access to AWS accounts and necessary credentials for deployment.
-   Selection and integration of a third-party payment gateway.
-   Availability of product data (images, descriptions) for initial catalog population.

**Assumptions (from `analysis_document.md` and refined):**
1.  **Payment Gateway:** A third-party PCI DSS compliant payment gateway (e.g., Stripe, PayPal) will be used for all financial transactions. The application will not directly handle sensitive credit card information.
2.  **Product Data:** Initial product data (images, descriptions, categories, stock) will be provided for catalog population.
3.  **Shipping Provider:** Generic shipping rate calculation or flat rates will apply initially. Specific shipping provider integration will be defined in a later phase.
4.  **Backend Framework:** Python Django (with DRF) has been selected by `io8architect` to implement the API.
5.  **Hosting Environment:** AWS will be used for deployment, managed by `io8devops`.
6.  **Scalability:** The initial architecture (monolithic backend) is sufficient for MVP, with clear paths to microservices and advanced scaling as traffic grows.
7.  **Performance:** Caching and database optimizations will effectively manage typical e-commerce load.



---

## PRD UPDATE - 2025-10-15 12:42:20

## 6. Functional Requirements (Updated: 2025-10-15)
### 6.1. Public (Shopper) Facing Features Refinements
-   **FR-007: Order Placement (Refinement):** Authenticated users can proceed to checkout, provide shipping details, select payment method, and place an order. This operation will be **idempotent** to prevent duplicate order creation, even with repeated requests (per NFR-007).
-   **FR-008.1: Shopper Order Cancellation:** Authenticated users can request to cancel their order.
    -   **As a** logged-in shopper
    -   **I want to** cancel an order
    -   **So that** I can reverse an unintended purchase or change my mind
    -   **Acceptance Criteria:**
        -   [ ] A 'Cancel Order' option is available for eligible orders in my order history.
        -   [ ] An order can only be cancelled by a shopper if its status is 'Pending' or 'Processing' (per Business Rule 8 from Analysis).
        -   [ ] Upon successful cancellation, the order status is updated, and a confirmation is provided.

### 6.2. Admin Facing Features Refinements
-   **FR-009: Admin Product Management (Refinement):** Administrators can perform CRUD (Create, Read, Update, Delete) operations on products, including managing details, images, prices, stock, categories, and their respective inventory levels.
-   **FR-010: Admin Order Management (Refinement):** Administrators can view, search, filter, and update the status of customer orders, adhering to predefined workflow transitions (e.g., 'pending' -> 'processing' -> 'shipped').
-   **FR-011: Admin User Management (Refinement):** Administrators can view, search, and manage customer accounts, including assigning roles (e.g., 'customer', 'administrator') and updating user profiles.

---
## 7. Non-Functional Requirements (Updated: 2025-10-15)
-   **NFR-002: Security (Refinement):**
    -   Implement **JWT Token Refresh** mechanism for improved session management.
    -   Apply **Rate Limiting** on critical endpoints (e.g., login, registration, password reset) to mitigate brute-force attacks.
    -   Implement a robust **Content Security Policy (CSP)** on the frontend to prevent cross-site scripting (XSS).
    -   Strict adherence to **OWASP Top 10** protections against common web vulnerabilities, including broken authentication, sensitive data exposure, and security misconfiguration.
    -   **PCI DSS Compliance:** Payment processing is strictly offloaded to PCI DSS compliant third-party gateways; no sensitive card data is ever processed, stored, or transmitted by the application itself.
-   **NFR-003: Scalability (Refinement):**
    -   Utilize **Database Connection Pooling** (e.g., PgBouncer) for efficient database connection management, reducing overhead under heavy load.
    -   Implement comprehensive **Caching Strategies** (Redis cache-aside pattern) for read-heavy operations, supported by explicit cache invalidation strategies to ensure data freshness.
    -   Integrate **Asynchronous Task Queue** (Celery with Redis/RabbitMQ) for offloading non-critical, time-consuming background operations (e.g., email notifications, bulk product imports, complex report generation).
    -   Backend services designed for **Horizontal Scaling** behind an Application Load Balancer (ALB) to handle increased traffic and ensure high availability.
    -   Full **Containerization** (Docker) for both frontend and backend for consistent environments from development to production, facilitating orchestration with tools like Kubernetes for auto-scaling and high availability.
-   **NFR-004: Maintainability (Refinement):**
    -   Database schema migrations will be managed using Django's built-in migration system (replacing previous mention of Alembic for consistency with Django backend).

---
## 8. Epic Stories (Updated: 2025-10-15)
### Epic 2: Shopping Cart & Checkout (Refinement)
**User Stories:**
-   **US-006: Complete Secure Checkout (Refinement)**
    -   **Acceptance Criteria:**
        -   [ ] Payment is processed via a third-party, PCI DSS compliant gateway (e.g., Stripe/PayPal) to minimize the application's PCI scope.

### Epic 4: Admin Product & Category Management (Refinement)
**User Stories:**
-   **US-010: Add New Product (Refinement)**
    -   **As an** Administrator
    -   **I want to** add a new product to the catalog, including all details, images, initial stock, and assign it to an existing category
    -   **So that** the product is available for customers to browse and purchase
-   **US-012: Manage Product Categories (Refinement)**
    -   **As an** Administrator
    -   **I want to** create, edit, and delete product categories and efficiently assign/reassign products to them
    -   **So that** the product catalog is logically organized for shoppers and easily manageable

### Epic 5: Admin Order Management (Refinement)
**User Stories:**
-   **US-014: Update Order Status (Refinement)**
    -   **Acceptance Criteria:**
        -   [ ] An automated email notification is sent to the customer with the status change *and dynamically generated tracking information (if available)*.
        -   [ ] Order status transitions adhere to a predefined workflow (e.g., 'pending' -> 'processing' -> 'shipped' -> 'delivered' or 'cancelled').
-   **US-015: View Detailed Order Information (Refinement)**
    -   **As an** Administrator
    -   **I want to** view all comprehensive details for a specific order, including customer information, shipping address, order items, quantities, prices, payment status, applied discounts, and a full history of order status changes
    -   **So that** I can accurately process, ship, or address customer inquiries with complete context

### Epic 6: Admin User & Audit Management (Refinement)
**User Stories:**
-   **US-016: Manage Customer Accounts (Refinement)**
    -   **As an** Administrator
    -   **I want to** view, search, and manage customer user accounts and their associated roles and profiles
    -   **So that** I can provide support, update user privileges, and ensure data integrity

---
## 10. Technical Requirements (Updated: 2025-10-15)
### 10.1 Frontend (Angular Clarity) Refinements
-   **Modular Architecture:** Explicitly utilize `AuthModule`, `ProductCatalogModule`, `CartModule`, `CheckoutModule`, `UserProfileModule`, and `AdminModule` as lazy-loaded feature modules for improved performance and maintainability.
-   **State Management:** Leverage Angular Services with RxJS for reactive data flow and local component state management. NgRx is considered for future integration to handle complex global application state requirements.
-   **Configuration Management:** Environment-specific variables (e.g., API endpoints, feature flags) will be rigorously managed within the `environments` folder to ensure secure and flexible configuration across development, staging, and production environments without code changes.

### 10.2 Backend (Python Django/DRF) Refinements
-   **Framework:** Confirmed use of **Python Django** with **Django REST Framework (DRF)** for building powerful and flexible RESTful APIs.
-   **Architecture:** Implements a **Layered Monolithic Architecture** with distinct Presentation, Application, Domain, and Infrastructure layers to promote separation of concerns and facilitate structured development.
-   **ORM & Migrations:** Django's robust built-in ORM for efficient database interactions and its powerful migration system for managing database schema evolution.
-   **Admin Interface:** Leverage Django's powerful, extensible, and built-in Admin interface for rapid development and robust foundation of all administrative CRUD operations on products, orders, users, and categories, minimizing custom development for these critical functions.
-   **Serialization & Validation:** Extensive use of DRF serializers and Pydantic (for request body validation if used in conjunction with DRF, otherwise DRF serializers are primary) for robust input validation, data type enforcement, and consistent response model serialization, ensuring strong API contracts.
-   **API Design Standards:**
    -   **Error Responses:** All API error responses will follow a consistent JSON structure, including a `code`, human-readable `message`, and optional `details` for specific field errors or additional context, adhering to appropriate HTTP status codes.
    -   **Versioning:** API endpoints will be versioned using path-based versioning (e.g., `/api/v1/products`) to ensure backward compatibility as the API evolves.
    -   **List Endpoint Features:** All list endpoints (e.g., `/api/products`, `/api/admin/orders`, `/api/admin/auditlogs`) will consistently support pagination parameters (`limit`, `offset` or `page`, `pageSize`), filtering parameters (e.g., `?status=pending`, `?category_id=uuid`), and sorting capabilities.
    -   **Idempotency:** Critical write operations, particularly `POST /api/orders` and other state-changing requests, are explicitly designed to be **idempotent** to prevent unintended duplicate resource creation or state changes due to network issues or repeated client requests, enhancing data integrity and user experience.
-   **Asynchronous Tasks:** Integration with **Celery** (with Redis/RabbitMQ as a broker) for efficiently handling non-blocking, time-consuming background tasks such as sending order confirmation emails, inventory reconciliation after order fulfillment, bulk data imports, or complex report generation, thereby improving API responsiveness and overall system throughput.

### 10.3 Database (PostgreSQL) Refinements
-   **Schema:**
    -   **Users Table:** `id` (PK, UUID), `email` (unique), `password_hash` (securely hashed), `first_name`, `last_name`, `role` (enum: 'customer', 'administrator', default 'customer'), `created_at`, `updated_at`.
    -   **Products Table:** `id` (PK, UUID), `name`, `description`, `price`, `stock_quantity`, `category_id` (FK to Categories), `image_url` (or S3 key), `is_active` (boolean), `created_at`, `updated_at`.
    -   **Categories Table:** `id` (PK, UUID), `name` (unique), `description`.
    -   **Orders Table:** `id` (PK, UUID), `user_id` (FK to Users), `order_date`, `total_amount`, `status` (enum: 'pending', 'processing', 'shipped', 'delivered', 'cancelled'), `shipping_address_id` (FK to ShippingAddresses), `payment_status` (enum: 'pending', 'paid', 'refunded'), `created_at`, `updated_at`.
    -   **OrderItems Table:** `id` (PK, UUID), `order_id` (FK to Orders), `product_id` (FK to Products), `quantity`, `unit_price` (price at time of order).
    -   **ShippingAddresses Table:** `id` (PK, UUID), `user_id` (FK to Users, nullable), `recipient_name`, `address_line1`, `address_line2` (optional), `city`, `state`, `zip_code`, `country`, `is_default` (boolean).
    -   **AuditLogs Table:** `id` (PK, UUID), `user_id` (FK to Users, specifically administrators), `action` (string, e.g., 'PRODUCT_UPDATED', 'ORDER_STATUS_CHANGED'), `entity_type` (string, e.g., 'Product', 'Order', 'User'), `entity_id` (UUID, ID of the affected entity), `old_value` (JSON/Text, optional), `new_value` (JSON/Text, optional), `timestamp`.
-   **Indexing Strategy:** Optimized indexes will be created on primary keys, foreign keys, and frequently queried fields (`email`, `product_name`, `order_date`, `status`, `timestamp`, `action`, `entity_type`) to enhance query performance. PostgreSQL's built-in full-text search capabilities will be utilized for efficient product catalog and order searching.

### 10.4 Caching (Redis) Refinements
-   **Strategy:** Implement a cache-aside pattern where application logic first checks Redis for data before querying the primary database. This is particularly effective for read-heavy operations like fetching product listings or popular items. Robust cache invalidation strategies will be employed to ensure data freshness.
-   **Data Structures:** Utilize Redis Strings for simple key-value caching (e.g., user sessions, individual product details) and Hashes for storing complex objects like product categories or frequently accessed user profiles.

### 10.5 Security Refinements
-   **Authentication:** JWT (JSON Web Tokens) will be used for stateless authentication, complemented by a secure refresh token mechanism for improved session management and security.
-   **Authorization (RBAC):** Role-Based Access Control will be strictly enforced through backend middleware/decorators for API endpoints and frontend route guards, ensuring only authorized users can access specific functionalities based on their roles ('customer', 'administrator').
-   **API Security:** Implement rate limiting on critical endpoints (e.g., login, registration) to mitigate brute-force attacks. All communication will be secured using HTTPS (SSL/TLS). User passwords will be stored as securely hashed values (e.g., using bcrypt). Robust input validation will be applied on both frontend and backend to prevent common vulnerabilities like XSS, SQL injection, and buffer overflows.
-   **Frontend Security:** Implement a robust Content Security Policy (CSP) on the frontend to prevent cross-site scripting (XSS) and other content injection attacks.
-   **OWASP Top 10 Protections:** Comprehensive protections will be implemented against common web vulnerabilities identified in the OWASP Top 10, including broken authentication, sensitive data exposure, security misconfiguration, and insufficient logging and monitoring.
-   **Payment Security:** Strict reliance on PCI DSS compliant third-party payment gateways (e.g., Stripe, PayPal) to offload sensitive credit card information handling, minimizing the application's PCI scope and greatly reducing security risks by never processing, storing, or transmitting card data directly.

### 10.6 Deployment & Operations (AWS & Docker) Refinements
-   **Containerization:** Docker will be used for containerizing both the Angular frontend (serving static files via Nginx within the container) and the Django backend applications, ensuring consistent and isolated environments from development to production.
-   **Orchestration:** Docker Compose will be utilized for defining and running multi-container Docker applications locally for development and testing purposes. Kubernetes is a strong future consideration for managing, scaling, and deploying containerized applications in production for advanced auto-scaling and high availability requirements.
-   **AWS Services:**
    -   **Compute:** Amazon EC2 instances (or ECS Fargate for serverless container management) for hosting Docker containers (backend API).
    -   **Database:** Amazon RDS (Relational Database Service) for a fully managed, scalable, and highly available PostgreSQL database instance.
    -   **Static Assets/Media:** Amazon S3 for storing frontend build artifacts, product images, and other static content, potentially fronted by Amazon CloudFront (CDN) for global content delivery and improved performance.
    -   **Load Balancing:** Amazon ALB (Application Load Balancer) to efficiently distribute incoming traffic across multiple backend service instances, enhancing availability and performance.
    -   **Email Service:** Amazon SES (Simple Email Service) for reliable and scalable transactional emails (e.g., order confirmations, admin notifications, password resets).
    -   **Monitoring & Logging:** AWS CloudWatch for centralized logging, monitoring application metrics, and setting up alarms. AWS X-Ray will be used for distributed tracing across services to identify performance bottlenecks and optimize request flows.
    -   **Secrets Management:** AWS Secrets Manager for securely storing and retrieving sensitive credentials (e.g., database passwords, API keys) without embedding them directly in code.
-   **CI/CD Pipeline:** A robust CI/CD pipeline (using GitHub Actions or GitLab CI/CD) will be implemented to automate the entire software delivery process, including:
    -   **Automated Testing:** Running unit, integration, and end-to-end tests for both frontend and backend on every code push to maintain code quality and prevent regressions.
    -   **Consistent Builds & Deployments:** Guaranteeing that the application is built and deployed consistently across development, staging, and production environments, reducing manual errors and accelerating time-to-market for new features and bug fixes.
    -   **Docker Image Management:** Automated building of Docker images and pushing them to `ECR (Elastic Container Registry)`.
    -   **Container Security Scanning:** Integration of tools like Clair or Aqua Security into the pipeline for scanning Docker images for known vulnerabilities prior to deployment.
    -   **Rapid Feedback:** Providing immediate feedback to developers on the impact of their changes, fostering a culture of continuous improvement and faster iteration cycles, critical for a dynamic e-commerce platform.

---
## 14. Dependencies & Assumptions (Updated: 2025-10-15)
### Assumptions (Refinement)
-   **Assumption 6 (Scalability):** The initial Layered Monolithic Architecture is deemed sufficient for the Minimum Viable Product (MVP), with clearly defined architectural paths (e.g., transition to microservices, advanced database sharding, read replicas) established for future growth as user traffic and feature complexity increase.

