# Appointment API

> **Prefix:** `/api/v1/appointment*`

---

## GET `/api/v1/appointment-slots`

Get available appointment slots for a doctor on a specific date.

**Permission:** `PUBLIC`

### Query Parameters
| Param | Type | Required | Description |
|-------|------|----------|-------------|
| `doctor_uuid` | string (UUID) | ✅ | Doctor UUID |
| `date` | string | ✅ | Date in `Y-m-d` format (e.g. `2024-06-15`) |

### Response `200`
```json
{
  "success": true,
  "data": {
    "doctor_uuid": "550e8400-...",
    "date": "2024-06-15",
    "slots": [
      {
        "start": 1718438400,
        "end": 1718439600,
        "available": true
      },
      {
        "start": 1718439600,
        "end": 1718440800,
        "available": false
      }
    ]
  }
}
```

> All times are **Unix timestamps**. Slots are calculated from `WeeklySchedule` minus booked appointments, date overrides, and holidays.

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_NOT_FOUND_001` | 404 | Doctor not found |
| `ERR_VALIDATION_001` | 422 | Missing or invalid date/doctor_uuid |

---

## POST `/api/v1/appointment`

Book an appointment slot.

**Permission:** `AUTH` — any authenticated user

### Request Body (`application/json`)
```json
{
  "doctor_uuid": "550e8400-e29b-41d4-a716-446655440000",
  "slot_start": 1718438400,
  "slot_end": 1718439600,
  "note": "لطفاً سریع ویزیت شوم"
}
```

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `doctor_uuid` | string (UUID) | ✅ | Doctor UUID |
| `slot_start` | integer | ✅ | Slot start (Unix timestamp) |
| `slot_end` | integer | ✅ | Slot end (Unix timestamp) |
| `note` | string | ❌ | Patient note |

### Response `201`
```json
{
  "success": true,
  "data": {
    "uuid": "appt-uuid-...",
    "doctor": { "uuid": "...", "title": "دکتر علی احمدی" },
    "user": { "uuid": "...", "real_name": "..." },
    "slot_start": 1718438400,
    "slot_end": 1718439600,
    "status": "pending",
    "note": "...",
    "price": 500000,
    "created_at": 1717000000
  }
}
```

**Appointment Status Values:**
| Value | Description |
|-------|-------------|
| `pending` | Awaiting payment |
| `confirmed` | Paid and confirmed |
| `cancelled` | Cancelled |
| `completed` | Visit completed |
| `no_show` | Patient did not show |

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Missing token |
| `ERR_NOT_FOUND_001` | 404 | Doctor not found |
| `ERR_CONFLICT_001` | 409 | Slot already booked |
| `ERR_VALIDATION_001` | 422 | Invalid slot times |

---

## GET `/api/v1/appointment/{uuid}`

Get appointment detail.

**Permission:** `AUTH` — must be the patient, the doctor, or `ROLE_ADMIN`

### Path Parameters
| Param | Type | Description |
|-------|------|-------------|
| `uuid` | string (UUID) | Appointment UUID |

### Response `200`
```json
{
  "success": true,
  "data": {
    "uuid": "appt-uuid-...",
    "doctor": {
      "uuid": "...",
      "title": "دکتر علی احمدی",
      "image": "https://..."
    },
    "user": {
      "uuid": "...",
      "real_name": "کاربر",
      "mobile_number": "09..."
    },
    "slot_start": 1718438400,
    "slot_end": 1718439600,
    "status": "confirmed",
    "note": "...",
    "price": 500000,
    "payment_uuid": "pay-uuid-...",
    "created_at": 1717000000
  }
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Missing token |
| `ERR_FORBIDDEN_001` | 403 | Not the patient/doctor/admin |
| `ERR_NOT_FOUND_001` | 404 | Appointment not found |

---

## GET `/api/v1/appointments/doctor/{doctorUuid}`

Get all appointments for a specific doctor.

**Permission:** `AUTH` — must be the doctor, their secretary, or `ROLE_ADMIN`

### Path Parameters
| Param | Type | Description |
|-------|------|-------------|
| `doctorUuid` | string (UUID) | Doctor UUID |

### Query Parameters
| Param | Type | Required | Description |
|-------|------|----------|-------------|
| `status` | string | ❌ | Filter: `pending`, `confirmed`, `cancelled`, `completed`, `no_show` |

### Response `200`
```json
{
  "success": true,
  "data": [
    {
      "uuid": "...",
      "user": { "uuid": "...", "real_name": "..." },
      "slot_start": 1718438400,
      "slot_end": 1718439600,
      "status": "confirmed",
      "price": 500000
    }
  ]
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Missing token |
| `ERR_FORBIDDEN_001` | 403 | Not authorized to view this doctor's appointments |
| `ERR_NOT_FOUND_001` | 404 | Doctor not found |

---

## GET `/api/v1/appointments/user`

Get all appointments for the authenticated user.

**Permission:** `AUTH`

### Query Parameters
| Param | Type | Required | Description |
|-------|------|----------|-------------|
| `status` | string | ❌ | Filter by status |

### Response `200`
```json
{
  "success": true,
  "data": [
    {
      "uuid": "...",
      "doctor": { "uuid": "...", "title": "دکتر علی احمدی" },
      "slot_start": 1718438400,
      "slot_end": 1718439600,
      "status": "confirmed",
      "price": 500000
    }
  ]
}
```

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Missing token |

---

## PATCH `/api/v1/appointment/{uuid}/status`

Change appointment status.

**Permission:** `AUTH` — patient can cancel; doctor/secretary can confirm/complete/no_show; admin can do all

### Path Parameters
| Param | Type | Description |
|-------|------|-------------|
| `uuid` | string (UUID) | Appointment UUID |

### Request Body
```json
{
  "status": "cancelled",
  "version": 3
}
```

| Field | Type | Required | Description |
|-------|------|----------|-------------|
| `status` | string | ✅ | New status value |
| `version` | integer | ❌ | Optimistic lock version (prevents double-submit) |

**Allowed Transitions by Role:**
| Actor | Allowed transitions |
|-------|---------------------|
| Patient | `pending → cancelled` |
| Doctor / Secretary | `pending → confirmed`, `confirmed → completed`, `confirmed → no_show` |
| Admin | Any transition |

### Response `200`
Updated appointment object.

### Errors
| Code | HTTP | Description |
|------|------|-------------|
| `ERR_AUTH_001` | 401 | Missing token |
| `ERR_FORBIDDEN_001` | 403 | Not authorized for this transition |
| `ERR_NOT_FOUND_001` | 404 | Appointment not found |
| `ERR_CONFLICT_001` | 409 | Version mismatch (optimistic lock) |
| `ERR_VALIDATION_001` | 422 | Invalid status value |