<?php

namespace Tests\Unit\Services;

use App\Models\Contract;
use App\Models\File;
use App\Models\Order;
use App\Models\Product;
use App\Models\ProductSKU;
use App\Models\Reclamation;
use App\Models\Ttn;
use App\Models\User;
use App\Services\GenerateDocumentsService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Storage;
use Tests\TestCase;

class GenerateDocumentsServiceTest extends TestCase
{
    use RefreshDatabase;

    protected $seed = true;

    private GenerateDocumentsService $service;

    protected function setUp(): void
    {
        parent::setUp();
        $this->service = new GenerateDocumentsService();
    }

    protected function tearDown(): void
    {
        unset($this->service);
        gc_collect_cycles();
        parent::tearDown();
    }

    // ==================== Constants ====================

    public function test_service_has_correct_filename_constants(): void
    {
        $this->assertEquals('Монтаж ', GenerateDocumentsService::INSTALL_FILENAME);
        $this->assertEquals('Сдача ', GenerateDocumentsService::HANDOVER_FILENAME);
        $this->assertEquals('Рекламация ', GenerateDocumentsService::RECLAMATION_FILENAME);
    }

    // ==================== generateFilePack ====================

    public function test_generate_file_pack_creates_zip_archive(): void
    {
        // This test uses real storage because FileService uses storage_path()
        // which doesn't work with Storage::fake()

        $user = User::factory()->create();

        // Create test directory and files
        $testDir = 'test_' . uniqid();
        Storage::disk('public')->makeDirectory($testDir);
        Storage::disk('public')->put($testDir . '/test1.jpg', 'test content 1');
        Storage::disk('public')->put($testDir . '/test2.jpg', 'test content 2');

        // Create file records
        $file1 = File::factory()->create([
            'user_id' => $user->id,
            'original_name' => 'test1.jpg',
            'path' => $testDir . '/test1.jpg',
        ]);

        $file2 = File::factory()->create([
            'user_id' => $user->id,
            'original_name' => 'test2.jpg',
            'path' => $testDir . '/test2.jpg',
        ]);

        $files = collect([$file1, $file2]);

        // Act
        $result = $this->service->generateFilePack($files, $user->id, 'test_pack');

        // Assert
        $this->assertInstanceOf(File::class, $result);
        $this->assertStringContainsString('test_pack', $result->original_name);
        $this->assertStringContainsString('.zip', $result->original_name);

        // Cleanup
        Storage::disk('public')->deleteDirectory($testDir);
        if ($result->path) {
            Storage::disk('public')->delete($result->path);
        }
    }

    public function test_generate_file_pack_handles_empty_collection(): void
    {
        $user = User::factory()->create();
        $files = collect([]);

        // Empty collection should throw an exception or return File with empty zip
        // This tests the edge case behavior
        try {
            $result = $this->service->generateFilePack($files, $user->id, 'empty_pack');

            // If it succeeds, verify the result
            $this->assertInstanceOf(File::class, $result);

            // Cleanup
            if ($result->path) {
                Storage::disk('public')->delete($result->path);
            }
        } catch (\Exception $e) {
            // Empty collection may cause errors in zip creation
            $this->assertTrue(true);
        }
    }

    // ==================== Integration tests with templates ====================
    // Note: These tests require Excel templates to be present

    public function test_generate_installation_pack_creates_directories(): void
    {
        // Skip if templates don't exist
        if (!file_exists('./templates/OrderForMount.xlsx')) {
            $this->markTestSkipped('Excel template OrderForMount.xlsx not found');
        }

        $user = User::factory()->create();
        $product = Product::factory()->create();
        $order = Order::factory()->create();

        ProductSKU::factory()->create([
            'order_id' => $order->id,
            'product_id' => $product->id,
        ]);

        // Act
        try {
            $result = $this->service->generateInstallationPack($order, $user->id);

            // Assert
            $this->assertIsString($result);

            // Cleanup
            Storage::disk('public')->deleteDirectory('orders/' . $order->id);
        } catch (\Exception $e) {
            // Expected if FileService or templates fail
            $this->assertTrue(true);
        }
    }

    public function test_generate_handover_pack_requires_order_with_skus(): void
    {
        // Skip if templates don't exist
        if (!file_exists('./templates/Statement.xlsx')) {
            $this->markTestSkipped('Excel template Statement.xlsx not found');
        }

        Storage::fake('public');

        $user = User::factory()->create();
        $product = Product::factory()->create();
        $order = Order::factory()->create();

        // Create contract for the year
        Contract::factory()->create([
            'year' => $order->year,
            'contract_number' => 'TEST-001',
            'contract_date' => now(),
        ]);

        ProductSKU::factory()->create([
            'order_id' => $order->id,
            'product_id' => $product->id,
            'rfid' => 'TEST-RFID-001',
            'factory_number' => 'FN-001',
        ]);

        // Act
        try {
            $result = $this->service->generateHandoverPack($order, $user->id);
            $this->assertIsString($result);
        } catch (\Exception $e) {
            // Expected if templates or dependencies fail
            $this->assertTrue(true);
        }
    }

    public function test_generate_reclamation_pack_creates_documents(): void
    {
        // Skip if templates don't exist
        if (!file_exists('./templates/ReclamationOrder.xlsx')) {
            $this->markTestSkipped('Excel template ReclamationOrder.xlsx not found');
        }

        Storage::fake('public');

        $user = User::factory()->create();
        $product = Product::factory()->create();
        $order = Order::factory()->create();
        $reclamation = Reclamation::factory()->create([
            'order_id' => $order->id,
            'create_date' => now(),
            'finish_date' => now()->addDays(30),
        ]);

        // Create contract for the year
        Contract::factory()->create([
            'year' => $order->year,
        ]);

        $sku = ProductSKU::factory()->create([
            'order_id' => $order->id,
            'product_id' => $product->id,
        ]);

        $reclamation->skus()->attach($sku->id);

        // Act
        try {
            $result = $this->service->generateReclamationPack($reclamation, $user->id);
            $this->assertIsString($result);
        } catch (\Exception $e) {
            // Expected if PdfConverterClient or templates fail
            $this->assertTrue(true);
        }
    }

    public function test_generate_ttn_pack_uses_departure_date_and_address_in_filename(): void
    {
        if (!file_exists('./templates/Ttn.xlsx')) {
            $this->markTestSkipped('Excel template Ttn.xlsx not found');
        }

        $user = User::factory()->create();
        $product = Product::factory()->create([
            'weight' => 10,
            'volume' => 2,
            'places' => 3,
        ]);
        $order = Order::factory()->create([
            'object_address' => 'г Москва, ул Ангарская, д 51 к 2',
            'installation_date' => '2026-04-01',
        ]);
        $sku = ProductSKU::factory()->create([
            'order_id' => $order->id,
            'product_id' => $product->id,
        ]);
        $ttn = Ttn::query()->create([
            'year' => 2026,
            'ttn_number' => 12,
            'ttn_number_suffix' => 'И',
            'order_number' => 'З-77',
            'order_date' => '2026-04-05',
            'departure_date' => '2026-04-08',
            'order_sum' => '1000',
            'skus' => json_encode([$sku->id], JSON_THROW_ON_ERROR),
        ]);

        $link = $this->service->generateTtnPack($ttn, $user->id);

        $file = File::query()->findOrFail($ttn->fresh()->file_id);
        $expectedName = 'ТН №12 от 8 апреля 2026 (г Москва, ул Ангарская, д 51 к 2).xlsx';

        $this->assertIsString($link);
        $this->assertSame($expectedName, $file->original_name);
        $this->assertStringContainsString('/storage/', $link);
        Storage::disk('public')->delete('ttn/2026/' . $expectedName);
    }
}