<?php

namespace Tests\Feature;

use App\Models\BomConditionRule;
use App\Models\Model;
use App\Models\ModelFormula;
use App\Models\ModelParameter;
use App\Models\User;
use Database\Seeders\ParameterBasedBomTestSeeder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Laravel\Sanctum\Sanctum;
use Tests\TestCase;

class ParameterBasedBomApiTest extends TestCase
{
    use RefreshDatabase;

    private User $user;
    private Model $kss01Model;

    protected function setUp(): void
    {
        parent::setUp();

        // Set up test environment
        $this->artisan('migrate');
        $this->seed(ParameterBasedBomTestSeeder::class);

        // Create test user and authenticate
        $this->user = User::factory()->create(['tenant_id' => 1]);
        Sanctum::actingAs($this->user);

        // Set required headers
        $this->withHeaders([
            'X-API-KEY' => config('app.api_key', 'test-api-key'),
            'Accept' => 'application/json',
            'Content-Type' => 'application/json',
        ]);

        $this->kss01Model = Model::where('code', 'KSS01')->first();
    }

    /** @test */
    public function it_can_get_model_parameters()
    {
        // Act
        $response = $this->getJson("/api/v1/design/models/{$this->kss01Model->id}/parameters");

        // Assert
        $response->assertOk()
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    '*' => [
                        'id',
                        'name',
                        'label',
                        'type',
                        'default_value',
                        'validation_rules',
                        'options',
                        'sort_order',
                        'is_required',
                        'is_active',
                    ]
                ]
            ]);

        $parameters = $response->json('data');
        $this->assertCount(5, $parameters); // W0, H0, screen_type, install_type, power_source

        // Check parameter order
        $this->assertEquals('W0', $parameters[0]['name']);
        $this->assertEquals('H0', $parameters[1]['name']);
        $this->assertEquals('screen_type', $parameters[2]['name']);
    }

    /** @test */
    public function it_can_get_model_formulas()
    {
        // Act
        $response = $this->getJson("/api/v1/design/models/{$this->kss01Model->id}/formulas");

        // Assert
        $response->assertOk()
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    '*' => [
                        'id',
                        'name',
                        'expression',
                        'description',
                        'return_type',
                        'sort_order',
                        'is_active',
                    ]
                ]
            ]);

        $formulas = $response->json('data');
        $this->assertGreaterThanOrEqual(7, count($formulas)); // W1, H1, area, weight, motor, bracket, guide

        // Check formula order
        $this->assertEquals('W1', $formulas[0]['name']);
        $this->assertEquals('H1', $formulas[1]['name']);
        $this->assertEquals('area', $formulas[2]['name']);
    }

    /** @test */
    public function it_can_get_model_condition_rules()
    {
        // Act
        $response = $this->getJson("/api/v1/design/models/{$this->kss01Model->id}/rules");

        // Assert
        $response->assertOk()
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    '*' => [
                        'id',
                        'name',
                        'description',
                        'condition_expression',
                        'component_code',
                        'quantity_expression',
                        'priority',
                        'is_active',
                    ]
                ]
            ]);

        $rules = $response->json('data');
        $this->assertGreaterThanOrEqual(7, count($rules)); // Various case, bottom, shaft, pipe rules

        // Check rules are ordered by priority
        $priorities = collect($rules)->pluck('priority');
        $this->assertEquals($priorities->sort()->values(), $priorities->values());
    }

    /** @test */
    public function it_can_resolve_bom_for_small_screen()
    {
        // Arrange
        $inputParams = [
            'W0' => 1000,
            'H0' => 800,
            'screen_type' => 'SCREEN',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
            'parameters' => $inputParams
        ]);

        // Assert
        $response->assertOk()
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    'model_id',
                    'input_parameters',
                    'calculated_formulas' => [
                        'W1',
                        'H1',
                        'area',
                        'weight',
                        'motor',
                        'bracket',
                        'guide',
                    ],
                    'bom_items' => [
                        '*' => [
                            'component_code',
                            'quantity',
                            'rule_name',
                            'condition_expression',
                        ]
                    ],
                    'summary' => [
                        'total_components',
                        'total_weight',
                        'component_categories',
                    ]
                ]
            ]);

        $data = $response->json('data');

        // Check calculated formulas
        $formulas = $data['calculated_formulas'];
        $this->assertEquals(1120, $formulas['W1']); // 1000 + 120
        $this->assertEquals(900, $formulas['H1']);  // 800 + 100
        $this->assertEquals(1.008, $formulas['area']); // 1120 * 900 / 1000000
        $this->assertEquals('0.5HP', $formulas['motor']); // area <= 3

        // Check BOM items
        $bomItems = $data['bom_items'];
        $this->assertGreaterThan(0, count($bomItems));

        // Check specific components
        $caseItem = collect($bomItems)->first(fn($item) => str_contains($item['component_code'], 'CASE'));
        $this->assertEquals('CASE-SMALL', $caseItem['component_code']);

        $screenPipe = collect($bomItems)->first(fn($item) => $item['component_code'] === 'PIPE-SCREEN');
        $this->assertNotNull($screenPipe);

        $slatPipe = collect($bomItems)->first(fn($item) => $item['component_code'] === 'PIPE-SLAT');
        $this->assertNull($slatPipe);
    }

    /** @test */
    public function it_can_resolve_bom_for_large_screen()
    {
        // Arrange
        $inputParams = [
            'W0' => 2500,
            'H0' => 1500,
            'screen_type' => 'SCREEN',
            'install_type' => 'SIDE',
            'power_source' => 'AC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
            'parameters' => $inputParams
        ]);

        // Assert
        $response->assertOk();

        $data = $response->json('data');
        $formulas = $data['calculated_formulas'];

        // Check large screen calculations
        $this->assertEquals(2620, $formulas['W1']); // 2500 + 120
        $this->assertEquals(1600, $formulas['H1']); // 1500 + 100
        $this->assertEquals(4.192, $formulas['area']); // 2620 * 1600 / 1000000
        $this->assertEquals('1HP', $formulas['motor']); // 3 < area <= 6

        // Check medium case is selected
        $bomItems = $data['bom_items'];
        $caseItem = collect($bomItems)->first(fn($item) => str_contains($item['component_code'], 'CASE'));
        $this->assertEquals('CASE-MEDIUM', $caseItem['component_code']);

        // Check bracket quantity
        $bottomItem = collect($bomItems)->first(fn($item) => $item['component_code'] === 'BOTTOM-001');
        $this->assertEquals(3, $bottomItem['quantity']); // CEIL(2620 / 1000)
    }

    /** @test */
    public function it_can_resolve_bom_for_slat_type()
    {
        // Arrange
        $inputParams = [
            'W0' => 1500,
            'H0' => 1000,
            'screen_type' => 'SLAT',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
            'parameters' => $inputParams
        ]);

        // Assert
        $response->assertOk();

        $bomItems = $response->json('data.bom_items');

        // Check that SLAT pipe is used
        $screenPipe = collect($bomItems)->first(fn($item) => $item['component_code'] === 'PIPE-SCREEN');
        $slatPipe = collect($bomItems)->first(fn($item) => $item['component_code'] === 'PIPE-SLAT');

        $this->assertNull($screenPipe);
        $this->assertNotNull($slatPipe);
        $this->assertEquals('PIPE-SLAT', $slatPipe['component_code']);
    }

    /** @test */
    public function it_validates_missing_required_parameters()
    {
        // Arrange - Missing H0 parameter
        $incompleteParams = [
            'W0' => 1000,
            'screen_type' => 'SCREEN',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
            'parameters' => $incompleteParams
        ]);

        // Assert
        $response->assertStatus(422)
            ->assertJsonValidationErrors(['parameters.H0']);
    }

    /** @test */
    public function it_validates_parameter_ranges()
    {
        // Arrange - W0 below minimum
        $invalidParams = [
            'W0' => 100, // Below minimum (500)
            'H0' => 800,
            'screen_type' => 'SCREEN',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
            'parameters' => $invalidParams
        ]);

        // Assert
        $response->assertStatus(422)
            ->assertJsonValidationErrors(['parameters.W0']);
    }

    /** @test */
    public function it_validates_select_parameter_options()
    {
        // Arrange - Invalid screen_type
        $invalidParams = [
            'W0' => 1000,
            'H0' => 800,
            'screen_type' => 'INVALID_TYPE',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
            'parameters' => $invalidParams
        ]);

        // Assert
        $response->assertStatus(422)
            ->assertJsonValidationErrors(['parameters.screen_type']);
    }

    /** @test */
    public function it_can_create_product_from_model()
    {
        // Arrange
        $inputParams = [
            'W0' => 1200,
            'H0' => 900,
            'screen_type' => 'SCREEN',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        $productData = [
            'code' => 'KSS01-TEST-001',
            'name' => '테스트 스크린 블라인드 1200x900',
            'description' => 'API 테스트로 생성된 제품',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/products", [
            'parameters' => $inputParams,
            'product' => $productData,
        ]);

        // Assert
        $response->assertCreated()
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    'product' => [
                        'id',
                        'code',
                        'name',
                        'description',
                        'product_type',
                        'model_id',
                        'parameter_values',
                    ],
                    'bom_items' => [
                        '*' => [
                            'id',
                            'product_id',
                            'component_code',
                            'component_type',
                            'quantity',
                            'unit',
                        ]
                    ],
                    'summary' => [
                        'total_components',
                        'calculated_formulas',
                    ]
                ]
            ]);

        $data = $response->json('data');
        $product = $data['product'];

        // Check product data
        $this->assertEquals('KSS01-TEST-001', $product['code']);
        $this->assertEquals('테스트 스크린 블라인드 1200x900', $product['name']);
        $this->assertEquals($this->kss01Model->id, $product['model_id']);

        // Check parameter values are stored
        $parameterValues = json_decode($product['parameter_values'], true);
        $this->assertEquals(1200, $parameterValues['W0']);
        $this->assertEquals(900, $parameterValues['H0']);

        // Check BOM items
        $bomItems = $data['bom_items'];
        $this->assertGreaterThan(0, count($bomItems));

        foreach ($bomItems as $item) {
            $this->assertEquals($product['id'], $item['product_id']);
            $this->assertNotEmpty($item['component_code']);
            $this->assertGreaterThan(0, $item['quantity']);
        }
    }

    /** @test */
    public function it_can_preview_product_without_creating()
    {
        // Arrange
        $inputParams = [
            'W0' => 1800,
            'H0' => 1200,
            'screen_type' => 'SCREEN',
            'install_type' => 'SIDE',
            'power_source' => 'DC',
        ];

        // Act
        $response = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/preview", [
            'parameters' => $inputParams
        ]);

        // Assert
        $response->assertOk()
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    'suggested_product' => [
                        'code',
                        'name',
                        'description',
                    ],
                    'calculated_values' => [
                        'W1',
                        'H1',
                        'area',
                        'weight',
                        'motor',
                    ],
                    'bom_preview' => [
                        'total_components',
                        'components' => [
                            '*' => [
                                'component_code',
                                'quantity',
                                'description',
                            ]
                        ]
                    ],
                    'cost_estimate' => [
                        'total_material_cost',
                        'estimated_labor_cost',
                        'total_estimated_cost',
                    ]
                ]
            ]);

        $data = $response->json('data');

        // Check suggested product info
        $suggestedProduct = $data['suggested_product'];
        $this->assertStringContains('KSS01', $suggestedProduct['code']);
        $this->assertStringContains('1800x1200', $suggestedProduct['name']);

        // Check calculated values
        $calculatedValues = $data['calculated_values'];
        $this->assertEquals(1920, $calculatedValues['W1']); // 1800 + 120
        $this->assertEquals(1300, $calculatedValues['H1']); // 1200 + 100

        // Check BOM preview
        $bomPreview = $data['bom_preview'];
        $this->assertGreaterThan(0, $bomPreview['total_components']);
        $this->assertNotEmpty($bomPreview['components']);
    }

    /** @test */
    public function it_handles_authentication_properly()
    {
        // Arrange - Remove authentication
        Sanctum::actingAs(null);

        // Act
        $response = $this->getJson("/api/v1/design/models/{$this->kss01Model->id}/parameters");

        // Assert
        $response->assertUnauthorized();
    }

    /** @test */
    public function it_handles_tenant_isolation()
    {
        // Arrange - Create user with different tenant
        $otherTenantUser = User::factory()->create(['tenant_id' => 2]);
        Sanctum::actingAs($otherTenantUser);

        // Act
        $response = $this->getJson("/api/v1/design/models/{$this->kss01Model->id}/parameters");

        // Assert
        $response->assertNotFound();
    }

    /** @test */
    public function it_handles_performance_for_large_datasets()
    {
        // Arrange - Use performance test model with many parameters/formulas/rules
        $performanceModel = Model::where('code', 'PERF-TEST')->first();

        if (!$performanceModel) {
            $this->markTestSkipped('Performance test model not found. Run in testing environment.');
        }

        $inputParams = array_fill_keys(
            ModelParameter::where('model_id', $performanceModel->id)->pluck('name')->toArray(),
            100
        );

        // Act
        $startTime = microtime(true);
        $response = $this->postJson("/api/v1/design/models/{$performanceModel->id}/bom/resolve", [
            'parameters' => $inputParams
        ]);
        $executionTime = microtime(true) - $startTime;

        // Assert
        $response->assertOk();
        $this->assertLessThan(2.0, $executionTime, 'BOM resolution should complete within 2 seconds');

        $data = $response->json('data');
        $this->assertArrayHasKey('calculated_formulas', $data);
        $this->assertArrayHasKey('bom_items', $data);
    }

    /** @test */
    public function it_returns_appropriate_error_for_nonexistent_model()
    {
        // Act
        $response = $this->getJson('/api/v1/design/models/999999/parameters');

        // Assert
        $response->assertNotFound()
            ->assertJson([
                'success' => false,
                'message' => 'error.model_not_found',
            ]);
    }

    /** @test */
    public function it_handles_concurrent_requests_safely()
    {
        // Arrange
        $inputParams = [
            'W0' => 1000,
            'H0' => 800,
            'screen_type' => 'SCREEN',
            'install_type' => 'WALL',
            'power_source' => 'AC',
        ];

        // Act - Simulate concurrent requests
        $promises = [];
        for ($i = 0; $i < 5; $i++) {
            $promises[] = $this->postJson("/api/v1/design/models/{$this->kss01Model->id}/bom/resolve", [
                'parameters' => $inputParams
            ]);
        }

        // Assert - All should succeed with same results
        foreach ($promises as $response) {
            $response->assertOk();
            $formulas = $response->json('data.calculated_formulas');
            $this->assertEquals(1120, $formulas['W1']);
            $this->assertEquals(900, $formulas['H1']);
        }
    }
}