<?php

namespace Tests\Unit;

use App\Models\FileModel;
use CodeIgniter\Test\CIUnitTestCase;
use Tests\Support\TestUploadedFile;

/**
 * Tests employeesUplodWithEvents enrollment date handling (d-m-Y / d/m/Y) and file upload validation.
 *
 * @internal
 */
class EmployeesUploadWithEventsTest extends CIUnitTestCase
{
    private const SAMPLE_EXCEL = ROOTPATH . 'public/sample_excel/enrollment.xlsx';

    protected function setUp(): void
    {
        parent::setUp();
        helper('utility');
    }

    /**
     * @dataProvider enrollmentDateFormatProvider
     */
    public function testChangeDateFormatAcceptsDashAndSlashFormats(
        string $openDate,
        string $closeDate,
        string $expectedOpen,
        string $expectedClose
    ): void {
        $this->assertSame($expectedOpen, change_date_format($openDate, null, 'Y-m-d'));
        $this->assertSame($expectedClose, change_date_format($closeDate, null, 'Y-m-d'));
    }

    /**
     * Mirrors employeesUplodWithEvents date + files insert payload (EmployeeController.php ~395-403).
     *
     * @dataProvider enrollmentDateFormatProvider
     */
    public function testEnrollmentDatesAreConvertedBeforeFilesTableInsert(
        string $openDate,
        string $closeDate,
        string $expectedOpen,
        string $expectedClose
    ): void {
        $postData = [
            'client_id'             => 12,
            'policy_id'             => 34,
            'client_branch_id'      => 56,
            'created_by'            => 78,
            'enrollment_open_date'  => $openDate,
            'enrollment_close_date' => $closeDate,
        ];

        $insertPayload = $this->buildFilesInsertPayload($postData, 'enrollment_test.xlsx', 78);

        $this->assertSame($expectedOpen, $insertPayload['enrollment_open_date']);
        $this->assertSame($expectedClose, $insertPayload['enrollment_close_date']);
        $this->assertSame('enrollment', $insertPayload['action']);
        $this->assertSame('inprogress', $insertPayload['status']);
        $this->assertSame(12, $insertPayload['client_id']);
        $this->assertSame(34, $insertPayload['policy_id']);
        $this->assertSame(56, $insertPayload['client_branch_id']);
        $this->assertSame(78, $insertPayload['created_by']);
        $this->assertSame(78, $insertPayload['hr_id']);
    }

    public function testValidateExcelFileAcceptsSampleEnrollmentUpload(): void
    {
        if (!is_file(self::SAMPLE_EXCEL)) {
            $this->markTestSkipped('Sample enrollment excel not found.');
        }

        $uploadedFile = $this->createTestUploadedFile(self::SAMPLE_EXCEL);

        $this->assertTrue(validateExcelFile($uploadedFile));
        $this->assertTrue($uploadedFile->move(WRITEPATH . 'uploads/excel/'));

        $movedPath = WRITEPATH . 'uploads/excel/' . $uploadedFile->getName();
        $this->assertFileExists($movedPath);
        @unlink($movedPath);
    }

    public function testFileModelAllowedFieldsIncludeEnrollmentDates(): void
    {
        $reflection = new \ReflectionClass(FileModel::class);
        $property   = $reflection->getProperty('allowedFields');
        $property->setAccessible(true);
        $allowedFields = $property->getValue(new FileModel());

        $this->assertContains('enrollment_open_date', $allowedFields);
        $this->assertContains('enrollment_close_date', $allowedFields);
    }

    public static function enrollmentDateFormatProvider(): array
    {
        return [
            'd-m-Y format' => ['01-07-2026', '31-07-2026', '2026-07-01', '2026-07-31'],
            'd/m/Y format' => ['01/07/2026', '31/07/2026', '2026-07-01', '2026-07-31'],
            'mixed formats' => ['15-08-2026', '30/08/2026', '2026-08-15', '2026-08-30'],
        ];
    }

    /**
     * @return array<string, mixed>
     */
    private function buildFilesInsertPayload(array $postData, string $filename, int $loggedInUserId): array
    {
        return [
            'file_name'             => $filename,
            'client_id'             => $postData['client_id'] ?? null,
            'policy_id'             => $postData['policy_id'] ?? null,
            'created_by'            => $loggedInUserId,
            'status'                => 'inprogress',
            'action'                => 'enrollment',
            'client_branch_id'      => $postData['client_branch_id'] ?? null,
            'uploaded_by'           => 1,
            'enrollment_open_date'  => change_date_format($postData['enrollment_open_date'] ?? null, null, 'Y-m-d'),
            'enrollment_close_date' => change_date_format($postData['enrollment_close_date'] ?? null, null, 'Y-m-d'),
            'hr_id'                 => $postData['created_by'] ?? null,
        ];
    }

    private function createTestUploadedFile(string $sourcePath): TestUploadedFile
    {
        $tmpPath = tempnam(sys_get_temp_dir(), 'enroll_test_') . '.xlsx';
        copy($sourcePath, $tmpPath);

        return new TestUploadedFile(
            $tmpPath,
            basename($sourcePath),
            'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
            filesize($tmpPath),
            UPLOAD_ERR_OK
        );
    }
}