# AGENTS.md - Code Guidelines for CLQMS

> **CLQMS (Clinical Laboratory Quality Management System)** - A headless REST API backend for clinical laboratory workflows built with CodeIgniter 4.

---

## Build, Test & Lint Commands

```bash
# Run all tests
./vendor/bin/phpunit

# Run a specific test file
./vendor/bin/phpunit tests/feature/Patients/PatientCreateTest.php

# Run a specific test method
./vendor/bin/phpunit --filter testCreatePatientSuccess tests/feature/Patients/PatientCreateTest.php

# Run tests with coverage
./vendor/bin/phpunit --coverage-html build/logs/html

# Run tests by suite
./vendor/bin/phpunit --testsuite App

# Generate scaffolding
php spark make:migration <name>
php spark make:model <name>
php spark make:controller <name>

# Database migrations
php spark migrate
php spark migrate:rollback
```

---

## Code Style Guidelines

### PHP Standards
- **PHP Version**: 8.1+
- **PSR-4 Autoloading**: `App\` maps to `app/`, `Config\` maps to `app/Config/`
- **PSR-12 Coding Style** (follow where applicable)

### Naming Conventions

| Element | Convention | Example |
|---------|-----------|---------|
| Classes | PascalCase | `PatientController` |
| Methods | camelCase | `createPatient()` |
| Properties | snake_case (legacy) / camelCase (new) | `$patient_id` / `$patientId` |
| Constants | UPPER_SNAKE_CASE | `MAX_RETRY_COUNT` |
| Tables | snake_case | `patient_visits` |
| Columns | PascalCase (legacy) | `PatientID`, `NameFirst` |
| JSON fields | PascalCase | `"PatientID": "123"` |

### Imports & Namespaces
- Fully qualified namespaces at the top
- Group imports: Framework first, then App, then external
- Alphabetical order within groups

```php
<?php

namespace App\Controllers;

use CodeIgniter\Controller;
use CodeIgniter\HTTP\ResponseInterface;
use App\Traits\ResponseTrait;
use Firebase\JWT\JWT;
```

### Controller Structure
```php
<?php

namespace App\Controllers;

use App\Traits\ResponseTrait;

class ExampleController extends Controller
{
    use ResponseTrait;

    protected $model;
    protected $db;

    public function __construct()
    {
        $this->db = \Config\Database::connect();
        $this->model = new \App\Models\ExampleModel();
    }

    public function index() { /* ... */ }
    public function create() { /* ... */ }
}
```

### Response Format
All API responses use standardized format:

```php
// Success
return $this->respond([
    'status' => 'success',
    'message' => 'Operation completed',
    'data' => $data
], 200);

// Error
return $this->respond([
    'status' => 'failed',
    'message' => 'Error description',
    'data' => []
], 400);
```

**Note**: Custom `ResponseTrait` automatically converts empty strings to `null`.

### Error Handling
- Use try-catch for JWT and external calls
- Log errors: `log_message('error', $message)`
- Return structured error responses with appropriate HTTP status codes

```php
try {
    $decoded = JWT::decode($token, new Key($key, 'HS256'));
} catch (\Firebase\JWT\ExpiredException $e) {
    return $this->respond(['status' => 'failed', 'message' => 'Token expired'], 401);
} catch (\Exception $e) {
    return $this->respond(['status' => 'failed', 'message' => 'Invalid token'], 401);
}
```

### Database Operations
- Use CodeIgniter Query Builder or Model methods
- Use `helper('utc')` for UTC date conversion
- Wrap multi-table operations in transactions

```php
$this->db->transStart();
// ... database operations
$this->db->transComplete();

if ($this->db->transStatus() === false) {
    return $this->respond(['status' => 'error', 'message' => 'Transaction failed'], 500);
}
```

### Model Patterns
- Extend `BaseModel` for automatic UTC date handling
- Use `checkDbError()` for database error detection

```php
<?php

namespace App\Models;

class PatientModel extends BaseModel
{
    protected $table = 'patients';
    protected $primaryKey = 'PatientID';
    protected $allowedFields = ['NameFirst', 'NameLast', ...];

    private function checkDbError($db, string $context) {
        $error = $db->error();
        if (!empty($error['code'])) {
            throw new \Exception("{$context} failed: {$error['code']} - {$error['message']}");
        }
    }
}
```

### Testing Guidelines

```php
<?php

namespace Tests\Feature\Patients;

use CodeIgniter\Test\FeatureTestTrait;
use CodeIgniter\Test\CIUnitTestCase;
use Faker\Factory;

class PatientCreateTest extends CIUnitTestCase
{
    use FeatureTestTrait;

    protected $endpoint = 'api/patient';

    public function testCreatePatientSuccess()
    {
        $faker = Factory::create('id_ID');
        $payload = [...];
        $result = $this->withBodyFormat('json')->post($this->endpoint, $payload);
        $result->assertStatus(201);
    }
}
```

**Test Naming**: `test<Action><Scenario><ExpectedResult>` (e.g., `testCreatePatientValidationFail`)

**Test Status Codes**: 200 (GET/PATCH), 201 (POST), 400 (Validation), 401 (Unauthorized), 404 (Not Found), 500 (Server Error)

### API Design
- **Base URL**: `/api/`
- **Authentication**: JWT token via HttpOnly cookie
- **Content-Type**: `application/json`
- **Methods**: GET (read), POST (create), PATCH (partial update), DELETE (delete)

### Routes Pattern
```php
$routes->group('api/patient', function ($routes) {
    $routes->get('/', 'Patient\PatientController::index');
    $routes->post('/', 'Patient\PatientController::create');
    $routes->get('(:num)', 'Patient\PatientController::show/$1');
    $routes->patch('/', 'Patient\PatientController::update');
    $routes->delete('/', 'Patient\PatientController::delete');
});
```

### Security
- Use `auth` filter for protected routes
- Sanitize user inputs
- Use parameterized queries
- Store secrets in `.env`, never commit

---

## Project-Specific Conventions

### API Documentation Sync
**CRITICAL**: When updating any controller, you MUST also update the corresponding OpenAPI YAML documentation:

- **Paths**: `public/paths/<resource>.yaml` (e.g., `patients.yaml`, `orders.yaml`)
- **Schemas**: `public/components/schemas/<resource>.yaml`
- **Main file**: `public/api-docs.yaml` (for tags and schema references)

**After updating YAML files**, regenerate the bundled documentation:
```bash
node public/bundle-api-docs.js
```

This produces `public/api-docs.bundled.yaml` which is used by Swagger UI/Redoc.

### Controller-to-YAML Mapping
| Controller | YAML Path File | YAML Schema File |
|-----------|----------------|------------------|
| `PatientController` | `paths/patients.yaml` | `components/schemas/patient.yaml` |
| `PatVisitController` | `paths/patient-visits.yaml` | `components/schemas/patient-visit.yaml` |
| `OrderTestController` | `paths/orders.yaml` | `components/schemas/orders.yaml` |
| `SpecimenController` | `paths/specimen.yaml` | `components/schemas/specimen.yaml` |
| `TestsController` | `paths/tests.yaml` | `components/schemas/tests.yaml` |
| `AuthController` | `paths/authentication.yaml` | `components/schemas/authentication.yaml` |
| `ResultController` | `paths/results.yaml` | `components/schemas/*.yaml` |
| `EdgeController` | `paths/edge-api.yaml` | `components/schemas/edge-api.yaml` |
| `LocationController` | `paths/locations.yaml` | `components/schemas/master-data.yaml` |
| `ValueSetController` | `paths/valuesets.yaml` | `components/schemas/valuesets.yaml` |
| `ContactController` | `paths/contact.yaml` | (inline schemas) |

### Legacy Field Naming
Database uses PascalCase columns: `PatientID`, `NameFirst`, `Birthdate`, `CreatedAt`, `UpdatedAt`

### ValueSet System
```php
use App\Libraries\Lookups;

$genders = Lookups::get('gender');
$label = Lookups::getLabel('gender', '1'); // Returns 'Female'
$options = Lookups::getOptions('gender');
$labeled = Lookups::transformLabels($data, ['Sex' => 'gender']);
```

### Nested Data Handling
For entities with nested data (PatIdt, PatCom, PatAtt):
- Extract nested arrays before filtering
- Use transactions for multi-table operations
- Handle empty/null arrays appropriately

---

## Environment Configuration

### Database (`.env`)
```ini
database.default.hostname = localhost
database.default.database = clqms01
database.default.username = root
database.default.password = adminsakti
database.default.DBDriver = MySQLi
```

### JWT Secret (`.env`)
```ini
JWT_SECRET = '5pandaNdutNdut'
```

---

## Additional Notes

- **API-Only**: No view layer - headless REST API
- **Frontend Agnostic**: Any client can consume these APIs
- **Stateless**: JWT-based authentication per request
- **UTC Dates**: All dates stored in UTC, converted for display

*© 2025 5Panda Team. Engineering Precision in Clinical Diagnostics.*