<?php

namespace Tests\Unit;

use CodeIgniter\Test\CIUnitTestCase;
use App\Services\CalculateService;
use App\Services\PromoService;

class CalculateServiceTest extends CIUnitTestCase
{
    protected $calculateService;

    protected function setUp(): void
    {
        parent::setUp();
        
        // Mock PromoService for testing
        /** @var PromoService $promoService */
        $promoService = $this->createMock(PromoService::class);
        $this->calculateService = new CalculateService($promoService);
    }

    public function testCalculateDeliveryFee()
    {
        // Test cases for delivery fee calculation
        $testCases = [
            ['distance' => 0, 'expected' => 0.00],
            ['distance' => 2.5, 'expected' => 5.00],   // Below 5 km: RM 5
            ['distance' => 5.0, 'expected' => 7.00],   // 5-6.99 km: RM 7
            ['distance' => 6.99, 'expected' => 7.00],  // 5-6.99 km: RM 7
            ['distance' => 7.0, 'expected' => 12.00],  // 7-12.99 km: RM 12
            ['distance' => 10.5, 'expected' => 12.00], // 7-12.99 km: RM 12
            ['distance' => 12.99, 'expected' => 12.00], // 7-12.99 km: RM 12
            ['distance' => 13.0, 'expected' => 15.00],  // 13-20 km: RM 15
            ['distance' => 16.5, 'expected' => 15.00], // 13-20 km: RM 15
            ['distance' => 20.0, 'expected' => 15.00], // 13-20 km: RM 15
            ['distance' => 22.0, 'expected' => 17.00], // Above 20 km: +RM 2 for every 5 km
            ['distance' => 25.0, 'expected' => 17.00], // Above 20 km: +RM 2 for every 5 km
            ['distance' => 27.0, 'expected' => 19.00], // Above 20 km: +RM 2 for every 5 km
            ['distance' => 30.0, 'expected' => 19.00], // Above 20 km: +RM 2 for every 5 km
        ];

        foreach ($testCases as $testCase) {
            $result = $this->calculateService->calculateDeliveryFee($testCase['distance']);
            $this->assertEquals(
                $testCase['expected'], 
                $result, 
                "Distance: {$testCase['distance']} km should cost RM {$testCase['expected']}, but got RM {$result}"
            );
        }
    }

    public function testCalculateDeliveryFeeWithInvalidInput()
    {
        // Test invalid inputs
        $invalidInputs = [
            -5.0,           // Negative distance
            'invalid',      // String
            null,           // Null
            [],             // Array
            true,           // Boolean
        ];

        foreach ($invalidInputs as $invalidInput) {
            $result = $this->calculateService->calculateDeliveryFee($invalidInput);
            $this->assertEquals(0, $result, "Invalid input '{$invalidInput}' should return 0");
        }
    }

    public function testCalculateDistanceWithInvalidInput()
    {
        // Test invalid outlet ID
        $result = $this->calculateService->calculateDistance('invalid', 3.123, 101.654);
        $this->assertEquals(0, $result, 'Invalid outlet ID should return 0');

        // Test invalid coordinates
        $result = $this->calculateService->calculateDistance(1, 'invalid_lat', 101.654);
        $this->assertEquals(0, $result, 'Invalid latitude should return 0');

        $result = $this->calculateService->calculateDistance(1, 3.123, 'invalid_lng');
        $this->assertEquals(0, $result, 'Invalid longitude should return 0');

        // Test out of range coordinates
        $result = $this->calculateService->calculateDistance(1, 100.0, 101.654); // Latitude > 90
        $this->assertEquals(0, $result, 'Latitude > 90 should return 0');

        $result = $this->calculateService->calculateDistance(1, 3.123, 200.0); // Longitude > 180
        $this->assertEquals(0, $result, 'Longitude > 180 should return 0');
    }

    public function testDeliveryFeeCalculationLogic()
    {
        // Test edge cases around the boundaries
        $this->assertEquals(5.00, $this->calculateService->calculateDeliveryFee(4.99), '4.99 km should be RM 5');
        $this->assertEquals(7.00, $this->calculateService->calculateDeliveryFee(5.00), '5.00 km should be RM 7');
        $this->assertEquals(7.00, $this->calculateService->calculateDeliveryFee(6.99), '6.99 km should be RM 7');
        $this->assertEquals(12.00, $this->calculateService->calculateDeliveryFee(7.00), '7.00 km should be RM 12');
        $this->assertEquals(12.00, $this->calculateService->calculateDeliveryFee(12.99), '12.99 km should be RM 12');
        $this->assertEquals(15.00, $this->calculateService->calculateDeliveryFee(13.00), '13.00 km should be RM 15');
        $this->assertEquals(15.00, $this->calculateService->calculateDeliveryFee(20.00), '20.00 km should be RM 15');
        $this->assertEquals(17.00, $this->calculateService->calculateDeliveryFee(21.00), '21.00 km should be RM 17');
        $this->assertEquals(17.00, $this->calculateService->calculateDeliveryFee(24.99), '24.99 km should be RM 17');
        $this->assertEquals(19.00, $this->calculateService->calculateDeliveryFee(25.00), '25.00 km should be RM 19');
    }
}