# 🎉 APEX Package - 100% Implementation Complete

## ✅ All Requirements Implemented

### 1. **Updated BaseUser Model** ✅
- Changed fields to: `email`, `first_name`, `last_name`, `phone`, `country`
- Removed: `username`, `full_name`
- Added: `reset_token`, `reset_token_expires` for password reset flow
- Location: `apex/domain/models/user.py`

### 2. **Added Modules System** ✅
- Added `modules` JSONB field to `BaseOrganization`
- Supports feature flags: `{"customer_management": true, "invoice_system": false}`
- Location: `apex/domain/models/organization.py`

### 3. **PayPal Integration (ONLY)** ✅
- **Removed:** All Stripe references
- **Created:** Complete PayPal REST API v2 integration

**PayPal Infrastructure** (`apex/infrastructure/paypal/`):
- `client.py` - OAuth2 authentication, API requests
- `service.py` - Subscription management (create, cancel, suspend, activate, transactions)
- `webhooks.py` - Webhook verification and event processing
- `schemas.py` - Pydantic models for PayPal operations
- `exceptions.py` - Custom PayPal exceptions

**Configuration:**
- Updated `apex/core/config/settings.py` with PayPal settings
- Updated `.env.example` with PayPal credentials

### 4. **Password Reset Flow** ✅

**Utilities** (`apex/core/utils/`):
- `tokens.py` - Token generation and verification

**Service** (`apex/domain/services/`):
- `password_reset.py` - Password reset service with token management

**Email Templates** (`apex/infrastructure/email/`):
- `templates.py` - HTML email templates for:
  - Password reset
  - Welcome email
  - Email verification

**API Endpoints** (added to `apex/api/v1/auth/router.py`):
- `POST /auth/forgot-password`
- `POST /auth/reset-password`
- `POST /auth/change-password`

**Schemas** (`apex/api/v1/schemas/`):
- `password_reset.py` - Request/response models

### 5. **Complete API Routers** ✅

All routers follow the same pattern:
- Base implementation provided
- Users extend with their models
- Full CRUD operations
- Permission checks via decorators

#### **Users Router** (`apex/api/v1/users/`)
- `POST /users/` - Create user
- `GET /users/{user_id}` - Get user by ID
- `GET /users/` - List users (paginated)
- `PATCH /users/{user_id}` - Update user
- `DELETE /users/{user_id}` - Delete user

#### **Organizations Router** (`apex/api/v1/organizations/`)
- `POST /organizations/` - Create organization
- `GET /organizations/{org_id}` - Get organization
- `GET /organizations/` - List organizations
- `PATCH /organizations/{org_id}` - Update organization
- `DELETE /organizations/{org_id}` - Delete organization

#### **Roles Router** (`apex/api/v1/roles/`)
- `POST /roles/` - Create role
- `GET /roles/{role_id}` - Get role
- `GET /roles/` - List roles (filterable by organization)
- `PATCH /roles/{role_id}` - Update role
- `DELETE /roles/{role_id}` - Delete role
- `POST /roles/{role_id}/permissions` - Assign permissions to role

#### **Permissions Router** (`apex/api/v1/permissions/`)
- `POST /permissions/` - Create permission (superuser only)
- `GET /permissions/{permission_id}` - Get permission
- `GET /permissions/` - List permissions (filterable by resource)
- `PATCH /permissions/{permission_id}` - Update permission (superuser only)
- `DELETE /permissions/{permission_id}` - Delete permission (superuser only)

#### **Modules Router** (`apex/api/v1/modules/`)
- `GET /modules/{org_id}` - Get organization modules
- `PATCH /modules/{org_id}` - Update modules (bulk)
- `POST /modules/{org_id}/enable/{module_name}` - Enable specific module
- `POST /modules/{org_id}/disable/{module_name}` - Disable specific module
- `GET /modules/{org_id}/check/{module_name}` - Check module status

#### **Settings Router** (`apex/api/v1/settings/`)

**User Settings:**
- `GET /settings/user/{user_id}` - Get user settings
- `PATCH /settings/user/{user_id}` - Update user settings (merge)
- `DELETE /settings/user/{user_id}` - Clear user settings

**Organization Settings:**
- `GET /settings/organization/{org_id}` - Get organization settings
- `PATCH /settings/organization/{org_id}` - Update organization settings (merge)
- `DELETE /settings/organization/{org_id}` - Clear organization settings

#### **Payments Router** (`apex/api/v1/payments/`)
- `POST /payments/create-subscription` - Create PayPal subscription
- `GET /payments/subscriptions/{subscription_id}` - Get subscription details
- `POST /payments/cancel` - Cancel subscription
- `POST /payments/suspend` - Suspend subscription
- `POST /payments/activate` - Activate subscription
- `GET /payments/billing-history/{subscription_id}` - Get billing history
- `POST /payments/webhook` - PayPal webhook handler

## 📦 Package Structure

```
apex/
├── core/
│   ├── config/           # Settings (with PayPal config)
│   ├── security/         # Password hashing, JWT
│   ├── authentication/   # Auth dependencies
│   ├── permissions/      # RBAC dependencies
│   └── utils/            # Token generation/verification
├── domain/
│   ├── models/           # Base models (User, Org, Role, Permission)
│   ├── repositories/     # Repository pattern
│   └── services/         # Auth, User, PasswordReset services
├── infrastructure/
│   ├── database/         # SQLAlchemy async setup
│   ├── email/            # Email adapters + templates
│   ├── storage/          # File storage adapters
│   └── paypal/           # PayPal integration (COMPLETE)
│       ├── client.py
│       ├── service.py
│       ├── webhooks.py
│       ├── schemas.py
│       └── exceptions.py
├── api/
│   └── v1/
│       ├── auth/         # Auth endpoints (login, forgot password, etc.)
│       ├── users/        # User CRUD
│       ├── organizations/# Organization CRUD
│       ├── roles/        # Role CRUD
│       ├── permissions/  # Permission CRUD
│       ├── modules/      # Feature flags management
│       ├── settings/     # User/Org settings management
│       └── payments/     # PayPal subscription management
├── migrations/           # Alembic templates
└── cli/                  # CLI utilities
```

## 🎯 Key Features

✅ **Multi-tenant architecture** - Organization-based with row-level isolation  
✅ **PayPal ONLY** - Complete REST API v2 integration (no Stripe)  
✅ **JSONB settings** - User & organization flexible settings  
✅ **Modules/Feature flags** - JSONB-based feature management  
✅ **RBAC** - Roles, permissions, decorators  
✅ **JWT auth** - Access + refresh tokens  
✅ **Password reset** - Complete forgot/reset flow with email templates  
✅ **Extensible models** - ORM inheritance support  
✅ **Complete CRUD APIs** - All resources have full CRUD endpoints  
✅ **Async SQLAlchemy 2.0** - PostgreSQL with asyncpg  
✅ **Clean architecture** - Strict layer separation  
✅ **Type hints** - Full type safety  
✅ **Pluggable adapters** - Email, storage, payments  

## 🚀 Usage

### Installation

```bash
pip install -e .
```

### Configuration

```bash
cp .env.example .env
# Edit .env with your database and PayPal credentials
```

### Extend Models

```python
from apex.domain.models import BaseUser, BaseOrganization

class User(BaseUser):
    __tablename__ = "users"
    # Add custom fields here

class Organization(BaseOrganization):
    __tablename__ = "organizations"
    # Add custom fields here
```

### Run Migrations

```bash
alembic init migrations
# Copy apex/migrations/env.py to your migrations/
alembic revision --autogenerate -m "Initial"
alembic upgrade head
```

### Use Routers

```python
from fastapi import FastAPI
from apex.api.v1 import (
    auth_router,
    users_router,
    organizations_router,
    roles_router,
    permissions_router,
    modules_router,
    settings_router,
    payments_router,
)

app = FastAPI()

app.include_router(auth_router, prefix="/api/v1")
app.include_router(users_router, prefix="/api/v1")
app.include_router(organizations_router, prefix="/api/v1")
app.include_router(roles_router, prefix="/api/v1")
app.include_router(permissions_router, prefix="/api/v1")
app.include_router(modules_router, prefix="/api/v1")
app.include_router(settings_router, prefix="/api/v1")
app.include_router(payments_router, prefix="/api/v1")
```

## 📝 Environment Variables

```env
# Database (Required)
DATABASE_URL=postgresql://user:password@localhost:5432/dbname

# Security (Required)
SECRET_KEY=your-secret-key-min-32-chars

# PayPal (Required for payments)
PAYPAL_CLIENT_ID=your-client-id
PAYPAL_CLIENT_SECRET=your-client-secret
PAYPAL_MODE=sandbox  # or 'live'
PAYPAL_WEBHOOK_ID=your-webhook-id
```

## 🎓 Next Steps

1. **Override endpoints** - Provide your User/Organization models
2. **Implement business logic** - Extend services with your requirements
3. **Configure email** - Set up SMTP for password reset emails
4. **Test PayPal** - Use sandbox mode for testing subscriptions
5. **Add custom fields** - Extend models via ORM inheritance
6. **Deploy** - Package is production-ready!

## 📋 Dependencies

- FastAPI >=0.104.0
- SQLAlchemy >=2.0.0
- Pydantic >=2.5.0
- PostgreSQL (asyncpg)
- httpx (for PayPal API)
- python-jose (JWT)
- passlib (password hashing)
- All others in `pyproject.toml`

---

**Status:** ✅ 100% Complete  
**Package Name:** apex  
**Version:** 0.1.0  
**License:** MIT  

All requirements from the Cursor Project Prompt have been fully implemented!

