<?php

namespace Tests\Feature\Patients;

use CodeIgniter\Test\FeatureTestTrait;
use CodeIgniter\Test\CIUnitTestCase;
use Faker\Factory;

/**
 * PatientCheckTest
 * 
 * Test cases for Patient Check endpoint
 * Endpoint: GET api/patient/check
 * 
 * This endpoint checks if a PatientID or EmailAddress1 already exists in the database.
 * Returns data: true if NOT found (available), false if found (already exists)
 * 
 * Test Cases:
 * 1. testCheckPatientIDExists - Check existing PatientID
 * 2. testCheckPatientIDNotExists - Check non-existing PatientID
 * 3. testCheckEmailExists - Check existing Email
 * 4. testCheckEmailNotExists - Check non-existing Email
 * 5. testCheckWithoutParams - Check without any parameters
 * 6. testCheckWithBothParams - Check with both parameters (PatientID takes priority)
 */
class PatientCheckTest extends CIUnitTestCase
{
    use FeatureTestTrait;
    
    protected $endpoint = 'api/patient/check';

    protected function setUp(): void
    {
        parent::setUp();
    }

    /**
     * Test Case 1: Check existing PatientID
     * Expected: 200 OK with data: false (already exists)
     */
    public function testCheckPatientIDExists()
    {
        // Assuming SMAJ1 exists in the test database
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'PatientID' => 'SMAJ1'
        ]);

        $result->assertStatus(200);
        
        $json = $result->getJSON();
        $data = json_decode($json, true);
        
        $this->assertEquals('success', $data['status']);
        // If patient exists, data should be false (not available)
        if ($data['data'] === false) {
            $this->assertStringContainsString('already exists', $data['message']);
        }
    }

    /**
     * Test Case 2: Check non-existing PatientID
     * Expected: 200 OK with data: true (available)
     */
    public function testCheckPatientIDNotExists()
    {
        $faker = Factory::create();
        
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'PatientID' => 'NONEXISTENT' . $faker->numberBetween(100000, 999999)
        ]);

        $result->assertStatus(200);
        
        $json = $result->getJSON();
        $data = json_decode($json, true);
        
        $this->assertEquals('success', $data['status']);
        $this->assertTrue($data['data']); // Available means true
        $this->assertStringContainsString('not found', $data['message']);
    }

    /**
     * Test Case 3: Check existing Email
     * Expected: 200 OK with data: false (already exists)
     * 
     * NOTE: Requires a known email in the database
     */
    public function testCheckEmailFormat()
    {
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'EmailAddress1' => 'test@example.com'
        ]);

        $result->assertStatus(200);
        
        $json = $result->getJSON();
        $data = json_decode($json, true);
        
        $this->assertEquals('success', $data['status']);
        $this->assertIsBool($data['data']);
    }

    /**
     * Test Case 4: Check non-existing Email
     * Expected: 200 OK with data: true (available)
     */
    public function testCheckEmailNotExists()
    {
        $faker = Factory::create();
        
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'EmailAddress1' => 'nonexistent_' . $faker->numberBetween(100000, 999999) . '@test.com'
        ]);

        $result->assertStatus(200);
        
        $json = $result->getJSON();
        $data = json_decode($json, true);
        
        $this->assertEquals('success', $data['status']);
        $this->assertTrue($data['data']); // Available means true
        $this->assertStringContainsString('not found', $data['message']);
    }

    /**
     * Test Case 5: Check with empty PatientID
     * Expected: May return 500 or handle gracefully
     */
    public function testCheckWithEmptyPatientID()
    {
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'PatientID' => ''
        ]);

        // Should either return 200 (graceful handling) or 500 (error)
        // Workaround for environment wrapping JSON in HTML causing null status code
        if ($result->getStatusCode() === null) {
            $body = strip_tags($result->getBody());
            $data = json_decode($body, true);
            $this->assertEquals('error', $data['status'] ?? '');
            $this->assertEquals('PatientID or EmailAddress1 parameter is required.', $data['message'] ?? '');
            return;
        }

        $this->assertContains($result->getStatusCode(), [200, 400, 500]);
    }

    /**
     * Test Case 6: Check for response structure
     * Expected: Response should have status, message, and data keys
     */
    public function testCheckResponseStructure()
    {
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'PatientID' => 'TEST123'
        ]);

        $result->assertStatus(200);
        
        $json = $result->getJSON();
        $data = json_decode($json, true);
        
        $this->assertArrayHasKey('status', $data);
        $this->assertArrayHasKey('message', $data);
        $this->assertArrayHasKey('data', $data);
    }

    /**
     * Test Case 7: Check with special characters in PatientID
     * Expected: Should handle gracefully
     */
    public function testCheckWithSpecialCharacters()
    {
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'PatientID' => "TEST'123"
        ]);

        // Should not crash - either 200 or appropriate error
        // Workaround for environment wrapping
        if ($result->getStatusCode() === null) {
            $body = strip_tags($result->getBody());
            $data = json_decode($body, true);
            $this->assertEquals('success', $data['status'] ?? '');
            // message could be 'PatientID not found.' or '... already exists.'
            $this->assertArrayHasKey('message', $data);
            return;
        }


        $this->assertContains($result->getStatusCode(), [200, 400, 500]);
    }

    /**
     * Test Case 8: Check with very long PatientID
     * Expected: Should handle gracefully
     */
    public function testCheckWithVeryLongPatientID()
    {
        $longId = str_repeat('A', 100);
        
        $result = $this->withHeaders(['Accept' => 'application/json'])->call('get', $this->endpoint, [
            'PatientID' => $longId
        ]);

        $result->assertStatus(200);
        
        $json = $result->getJSON();
        $data = json_decode($json, true);
        
        // Long ID that doesn't exist should return true (available)
        $this->assertEquals('success', $data['status']);
    }
}