# Authentication API

> **Prefix:** `/api/v1/user` and `/oauth`  
> **Permission:** All endpoints in this module are **PUBLIC** (no JWT required) except `userinfo` and `logout`

---

## POST `/api/v1/user/send-code`

Send OTP code to mobile number.

**Permission:** `PUBLIC`

### Request Body
```json
{
  "mobile": "09123456789"
}
```

| Field | Type | Required | Validation |
|-------|------|----------|------------|
| `mobile` | string | ✅ | Format: `09XXXXXXXXX` (11 digits) |

### Response `200`
```json
{
  "success": true,
  "data": {
    "uuid": "550e8400-e29b-41d4-a716-446655440000",
    "message": "کد تأیید ارسال شد"
  }
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_VALIDATION_001` | 422 | Invalid mobile format |
| `ERR_AUTH_004` | 429 | OTP rate limit exceeded |

---

## POST `/api/v1/user/verify-code`

Verify OTP code. Returns whether this is a new or existing user.

**Permission:** `PUBLIC`

### Request Body
```json
{
  "uuid": "550e8400-e29b-41d4-a716-446655440000",
  "code": "123456"
}
```

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `uuid` | string | ✅ | UUID returned from `send-code` |
| `code` | string | ✅ | 6-digit OTP |

### Response `200`
```json
{
  "success": true,
  "data": {
    "message": "کد تأیید شد",
    "is_new_user": false,
    "uuid": "550e8400-e29b-41d4-a716-446655440000"
  }
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_002` | 401 | Invalid OTP code |
| `ERR_AUTH_003` | 401 | OTP expired |
| `ERR_VALIDATION_002` | 422 | Missing required field |

---

## POST `/api/v1/user/register`

Complete registration for new users (called only when `is_new_user: true`).

**Permission:** `PUBLIC`

### Request Body
```json
{
  "uuid": "550e8400-e29b-41d4-a716-446655440000",
  "real_name": "علی احمدی"
}
```

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `uuid` | string | ✅ | Verified UUID from `verify-code` |
| `real_name` | string | ❌ | User's full name |

### Response `201`
```json
{
  "success": true,
  "data": {
    "message": "ثبت‌نام با موفقیت انجام شد",
    "uuid": "550e8400-e29b-41d4-a716-446655440000"
  }
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_VALIDATION_002` | 422 | Missing uuid |
| `ERR_CONFLICT_001` | 409 | User already registered |

---

## POST `/api/v1/user/login`

Login with mobile number and password (for users who set a password).

**Permission:** `PUBLIC`

### Request Body
```json
{
  "mobile_number": "09123456789",
  "password": "mypassword"
}
```

| Field | Type | Required |
|-------|------|----------|
| `mobile_number` | string | ✅ |
| `password` | string | ✅ |

### Response `200`
```json
{
  "success": true,
  "data": {
    "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...",
    "refresh_token": "def50200..."
  }
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_005` | 401 | Wrong credentials |
| `ERR_AUTH_006` | 403 | Account suspended |
| `ERR_AUTH_004` | 429 | Too many attempts |

---

## POST `/oauth/token`

Exchange verified UUID for JWT access token.

**Permission:** `PUBLIC`

### Request Body
```json
{
  "grant_type": "mobile",
  "uuid": "550e8400-e29b-41d4-a716-446655440000"
}
```

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `grant_type` | string | ✅ | Must be `"mobile"` |
| `uuid` | string | ✅ | UUID from verified OTP flow |

### Response `200`
```json
{
  "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...",
  "refresh_token": "def50200..."
}
```

> JWT payload: `{ username: mobile_number, roles: [...], iat, exp }`  
> Access token TTL: **1 hour** | Refresh token TTL: **30 days** (stored in Redis)

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_002` | 400 | Invalid or expired UUID |

---

## POST `/oauth/token/refresh`

Refresh expired JWT using refresh token.

**Permission:** `PUBLIC`

### Request Body
```json
{
  "refresh_token": "def50200..."
}
```

### Response `200`
```json
{
  "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9...",
  "refresh_token": "def50200..."
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Invalid or expired refresh token |

---

## GET `/oauth/userinfo`

Get authenticated user info.

**Permission:** `AUTH` — requires valid JWT

### Headers
```
Authorization: Bearer <token>
```

### Response `200`
```json
{
  "success": true,
  "data": {
    "uuid": "550e8400-e29b-41d4-a716-446655440000",
    "mobile_number": "09123456789",
    "real_name": "علی احمدی",
    "roles": ["ROLE_USER"],
    "status": "active",
    "created_at": 1717000000
  }
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Invalid or missing token |

---

## POST `/oauth/logout`

Invalidate the refresh token (stored in Redis).

**Permission:** `AUTH`

### Request Body
```json
{
  "refresh_token": "def50200..."
}
```

| Field | Type | Required |
|-------|------|----------|
| `refresh_token` | string | ❌ |

### Response `200`
```json
{
  "success": true,
  "data": {
    "message": "با موفقیت خارج شدید"
  }
}
```