<?php

namespace Tests\Feature\Http\Controllers\Api\V1;

use Domains\Platform\Models\PlatformAccount;
use Domains\Platform\Models\PlatformChannel;
use Domains\Platform\Models\PlatformInstance;
use Domains\Platform\Services\ChannelLanguageDetectionService;
use Domains\Platform\Api\Lemmy\LemmyApiService;
use Domains\Settings\Models\Language;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Cache;
use Tests\TestCase;
use Mockery;

class PlatformChannelsControllerTest extends TestCase
{
    use RefreshDatabase;

    protected function tearDown(): void
    {
        Mockery::close();
        parent::tearDown();
    }

    public function test_index_returns_successful_response(): void
    {
        $instance = PlatformInstance::factory()->create();
        PlatformChannel::factory()->count(3)->create(['platform_instance_id' => $instance->id]);

        $response = $this->getJson('/api/v1/platform-channels');

        $response->assertStatus(200)
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    '*' => [
                        'id',
                        'platform_instance_id',
                        'channel_id',
                        'name',
                        'display_name',
                        'description',
                        'is_active',
                        'created_at',
                        'updated_at',
                        'platform_instance'
                    ]
                ]
            ])
            ->assertJson([
                'success' => true,
                'message' => 'Platform channels retrieved successfully.'
            ]);
    }

    public function test_store_creates_platform_channel_successfully(): void
    {
        $instance = PlatformInstance::factory()->create();
        
        // Create a platform account for this instance first
        PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => true,
            'settings' => ['api_token' => 'test-token']
        ]);

        // Create a language for the test
        $language = Language::factory()->create([
            'short_code' => 'en',
            'name' => 'English',
            'is_active' => true
        ]);

        // Mock the ChannelLanguageDetectionService
        $mockService = Mockery::mock(ChannelLanguageDetectionService::class);
        $mockService->shouldReceive('detectChannelLanguages')
            ->with('Test Channel', $instance->id)
            ->once()
            ->andReturn([
                'language_id' => $language->id,
                'matched_languages' => [$language->id],
                'community_details' => ['community' => ['id' => 123]]
            ]);

        $this->app->bind(ChannelLanguageDetectionService::class, function () use ($mockService) {
            return $mockService;
        });

        $data = [
            'platform_instance_id' => $instance->id,
            'channel_id' => 'test_channel',
            'name' => 'Test Channel',
            'display_name' => 'Test Channel Display',
            'description' => 'A test channel',
            'is_active' => true
        ];

        $response = $this->postJson('/api/v1/platform-channels', $data);

        $response->assertStatus(201)
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    'id',
                    'platform_instance_id',
                    'channel_id',
                    'name',
                    'display_name',
                    'description',
                    'is_active',
                    'created_at',
                    'updated_at',
                ]
            ])
            ->assertJson([
                'success' => true,
                'message' => 'Platform channel created successfully and linked to platform account!'
            ]);

        $this->assertDatabaseHas('platform_channels', [
            'platform_instance_id' => $instance->id,
            'channel_id' => 'test_channel',
            'name' => 'Test Channel',
        ]);
    }

    public function test_store_validates_required_fields(): void
    {
        $response = $this->postJson('/api/v1/platform-channels', []);

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['platform_instance_id', 'channel_id', 'name']);
    }

    public function test_store_validates_platform_instance_exists(): void
    {
        $data = [
            'platform_instance_id' => 999,
            'channel_id' => 'test_channel',
            'name' => 'Test Channel'
        ];

        $response = $this->postJson('/api/v1/platform-channels', $data);

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['platform_instance_id']);
    }

    public function test_show_returns_platform_channel_successfully(): void
    {
        $instance = PlatformInstance::factory()->create();
        $channel = PlatformChannel::factory()->create(['platform_instance_id' => $instance->id]);

        $response = $this->getJson("/api/v1/platform-channels/{$channel->id}");

        $response->assertStatus(200)
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    'id',
                    'platform_instance_id',
                    'channel_id',
                    'name',
                    'display_name',
                    'description',
                    'is_active',
                    'created_at',
                    'updated_at',
                    'platform_instance'
                ]
            ])
            ->assertJson([
                'success' => true,
                'message' => 'Platform channel retrieved successfully.',
                'data' => [
                    'id' => $channel->id,
                    'name' => $channel->name,
                ]
            ]);
    }

    public function test_update_modifies_platform_channel_successfully(): void
    {
        $instance = PlatformInstance::factory()->create();
        $channel = PlatformChannel::factory()->create(['platform_instance_id' => $instance->id]);

        $updateData = [
            'name' => 'Updated Channel',
            'display_name' => 'Updated Display Name',
            'description' => 'Updated description',
            'is_active' => false
        ];

        $response = $this->putJson("/api/v1/platform-channels/{$channel->id}", $updateData);

        $response->assertStatus(200)
            ->assertJson([
                'success' => true,
                'message' => 'Platform channel updated successfully!'
            ]);

        $this->assertDatabaseHas('platform_channels', [
            'id' => $channel->id,
            'name' => 'Updated Channel',
            'display_name' => 'Updated Display Name',
            'is_active' => false,
        ]);
    }

    public function test_destroy_deletes_platform_channel_successfully(): void
    {
        $instance = PlatformInstance::factory()->create();
        $channel = PlatformChannel::factory()->create(['platform_instance_id' => $instance->id]);

        $response = $this->deleteJson("/api/v1/platform-channels/{$channel->id}");

        $response->assertStatus(200)
            ->assertJson([
                'success' => true,
                'message' => 'Platform channel deleted successfully!'
            ]);

        $this->assertDatabaseMissing('platform_channels', [
            'id' => $channel->id
        ]);
    }

    public function test_toggle_activates_inactive_channel(): void
    {
        $instance = PlatformInstance::factory()->create();
        $channel = PlatformChannel::factory()->create([
            'platform_instance_id' => $instance->id,
            'is_active' => false
        ]);

        $response = $this->postJson("/api/v1/platform-channels/{$channel->id}/toggle");

        $response->assertStatus(200)
            ->assertJson([
                'success' => true,
                'message' => 'Platform channel activated successfully!'
            ]);

        $this->assertDatabaseHas('platform_channels', [
            'id' => $channel->id,
            'is_active' => true
        ]);
    }

    public function test_toggle_deactivates_active_channel(): void
    {
        $instance = PlatformInstance::factory()->create();
        $channel = PlatformChannel::factory()->create([
            'platform_instance_id' => $instance->id,
            'is_active' => true
        ]);

        $response = $this->postJson("/api/v1/platform-channels/{$channel->id}/toggle");

        $response->assertStatus(200)
            ->assertJson([
                'success' => true,
                'message' => 'Platform channel deactivated successfully!'
            ]);

        $this->assertDatabaseHas('platform_channels', [
            'id' => $channel->id,
            'is_active' => false
        ]);
    }

    public function test_get_communities_returns_successful_response(): void
    {
        // Arrange
        $instance = PlatformInstance::factory()->create(['url' => 'lemmy.world']);
        $account = PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => true,
            'settings' => ['api_token' => 'test-token']
        ]);

        // Mock LemmyApiService
        $mockApiService = Mockery::mock(LemmyApiService::class);
        $mockApiService->shouldReceive('listCommunities')
            ->with('test-token', 'Local', 'Active', 50, 1, false)
            ->once()
            ->andReturn([
                'communities' => [
                    [
                        'community' => [
                            'id' => 1,
                            'name' => 'technology',
                            'title' => 'Technology',
                            'description' => 'Tech discussions',
                            'nsfw' => false,
                            'local' => true
                        ],
                        'counts' => [
                            'subscribers' => 1500,
                            'posts' => 250
                        ]
                    ],
                    [
                        'community' => [
                            'id' => 2,
                            'name' => 'news',
                            'title' => 'News',
                            'description' => 'Latest news',
                            'nsfw' => false,
                            'local' => true
                        ],
                        'counts' => [
                            'subscribers' => 2300,
                            'posts' => 450
                        ]
                    ]
                ]
            ]);

        $this->app->bind(LemmyApiService::class, function () use ($mockApiService) {
            return $mockApiService;
        });

        // Act
        $response = $this->getJson('/api/v1/platform-channels/communities?platform_instance_id=' . $instance->id);

        // Assert
        $response->assertStatus(200)
            ->assertJsonStructure([
                'success',
                'message',
                'data' => [
                    'communities' => [
                        '*' => [
                            'id',
                            'name',
                            'title',
                            'description',
                            'nsfw',
                            'local',
                            'subscribers',
                            'posts',
                            'display_text'
                        ]
                    ],
                    'total',
                    'platform_instance' => [
                        'id',
                        'name',
                        'url'
                    ],
                    'parameters' => [
                        'type',
                        'sort',
                        'limit',
                        'page',
                        'show_nsfw'
                    ]
                ]
            ])
            ->assertJson([
                'success' => true,
                'message' => 'Communities retrieved successfully.',
                'data' => [
                    'communities' => [
                        [
                            'id' => 1,
                            'name' => 'technology',
                            'title' => 'Technology',
                            'subscribers' => 1500,
                            'display_text' => 'Technology (1,500 subscribers)'
                        ],
                        [
                            'id' => 2,
                            'name' => 'news',
                            'title' => 'News',
                            'subscribers' => 2300,
                            'display_text' => 'News (2,300 subscribers)'
                        ]
                    ],
                    'total' => 2,
                    'parameters' => [
                        'type' => 'Local',
                        'sort' => 'Active',
                        'limit' => 50,
                        'page' => 1,
                        'show_nsfw' => false
                    ]
                ]
            ]);
    }

    public function test_get_communities_with_custom_parameters(): void
    {
        // Arrange
        $instance = PlatformInstance::factory()->create(['url' => 'lemmy.world']);
        $account = PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => true,
            'settings' => ['api_token' => 'test-token']
        ]);

        // Mock LemmyApiService with custom parameters
        $mockApiService = Mockery::mock(LemmyApiService::class);
        $mockApiService->shouldReceive('listCommunities')
            ->with('test-token', 'All', 'TopMonth', 25, 2, true)
            ->once()
            ->andReturn(['communities' => []]);

        $this->app->bind(LemmyApiService::class, function () use ($mockApiService) {
            return $mockApiService;
        });

        // Act
        $response = $this->getJson('/api/v1/platform-channels/communities?' . http_build_query([
            'platform_instance_id' => $instance->id,
            'type' => 'All',
            'sort' => 'TopMonth',
            'limit' => 25,
            'page' => 2,
            'show_nsfw' => true
        ]));

        // Assert
        $response->assertStatus(200)
            ->assertJson([
                'success' => true,
                'data' => [
                    'parameters' => [
                        'type' => 'All',
                        'sort' => 'TopMonth',
                        'limit' => 25,
                        'page' => 2,
                        'show_nsfw' => true
                    ]
                ]
            ]);
    }

    public function test_get_communities_validates_required_platform_instance_id(): void
    {
        $response = $this->getJson('/api/v1/platform-channels/communities');

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['platform_instance_id']);
    }

    public function test_get_communities_validates_platform_instance_exists(): void
    {
        $response = $this->getJson('/api/v1/platform-channels/communities?platform_instance_id=999');

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['platform_instance_id']);
    }

    public function test_get_communities_validates_type_parameter(): void
    {
        $instance = PlatformInstance::factory()->create();

        $response = $this->getJson('/api/v1/platform-channels/communities?' . http_build_query([
            'platform_instance_id' => $instance->id,
            'type' => 'InvalidType'
        ]));

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['type']);
    }

    public function test_get_communities_validates_sort_parameter(): void
    {
        $instance = PlatformInstance::factory()->create();

        $response = $this->getJson('/api/v1/platform-channels/communities?' . http_build_query([
            'platform_instance_id' => $instance->id,
            'sort' => 'InvalidSort'
        ]));

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['sort']);
    }

    public function test_get_communities_validates_limit_parameter(): void
    {
        $instance = PlatformInstance::factory()->create();

        $response = $this->getJson('/api/v1/platform-channels/communities?' . http_build_query([
            'platform_instance_id' => $instance->id,
            'limit' => 0  // Invalid: below minimum
        ]));

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['limit']);

        $response = $this->getJson('/api/v1/platform-channels/communities?' . http_build_query([
            'platform_instance_id' => $instance->id,
            'limit' => 101  // Invalid: above maximum
        ]));

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['limit']);
    }

    public function test_get_communities_validates_page_parameter(): void
    {
        $instance = PlatformInstance::factory()->create();

        $response = $this->getJson('/api/v1/platform-channels/communities?' . http_build_query([
            'platform_instance_id' => $instance->id,
            'page' => 0  // Invalid: below minimum
        ]));

        $response->assertStatus(422)
            ->assertJsonValidationErrors(['page']);
    }

    public function test_get_communities_fails_when_no_active_account_exists(): void
    {
        $instance = PlatformInstance::factory()->create(['url' => 'lemmy.world']);
        
        // Create an inactive account
        PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => false
        ]);

        $response = $this->getJson('/api/v1/platform-channels/communities?platform_instance_id=' . $instance->id);

        $response->assertStatus(422)
            ->assertJson([
                'success' => false,
                'message' => 'Cannot fetch communities: No active platform accounts found for this instance. Please create a platform account first.'
            ]);
    }

    public function test_get_communities_uses_cache(): void
    {
        // Arrange
        $instance = PlatformInstance::factory()->create(['url' => 'lemmy.world']);
        $account = PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => true,
            'settings' => ['api_token' => 'test-token']
        ]);

        $mockData = ['communities' => [['community' => ['id' => 1, 'name' => 'test']]]];
        $cacheKey = "communities:{$instance->id}:Local:Active:50:1:0";

        // Set cache data
        Cache::put($cacheKey, $mockData, 600);

        // Mock should not be called since cache hit
        $mockApiService = Mockery::mock(LemmyApiService::class);
        $mockApiService->shouldNotReceive('listCommunities');

        $this->app->bind(LemmyApiService::class, function () use ($mockApiService) {
            return $mockApiService;
        });

        // Act
        $response = $this->getJson('/api/v1/platform-channels/communities?platform_instance_id=' . $instance->id);

        // Assert
        $response->assertStatus(200)
            ->assertJson(['success' => true]);
    }

    public function test_get_communities_clears_cache_on_error(): void
    {
        // Arrange
        $instance = PlatformInstance::factory()->create(['url' => 'lemmy.world']);
        $account = PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => true,
            'settings' => ['api_token' => 'test-token']
        ]);

        $cacheKey = "communities:{$instance->id}:Local:Active:50:1:0";

        // Mock LemmyApiService to throw exception
        $mockApiService = Mockery::mock(LemmyApiService::class);
        $mockApiService->shouldReceive('listCommunities')
            ->once()
            ->andThrow(new \Exception('API Error'));

        $this->app->bind(LemmyApiService::class, function () use ($mockApiService) {
            return $mockApiService;
        });
        
        // Ensure cache is empty initially so API service gets called
        Cache::forget($cacheKey);
        $this->assertFalse(Cache::has($cacheKey));

        // Act
        $response = $this->getJson('/api/v1/platform-channels/communities?platform_instance_id=' . $instance->id);

        // Assert
        $response->assertStatus(500);
        // Cache should still not exist since the error prevented caching
        $this->assertFalse(Cache::has($cacheKey));
    }

    public function test_get_communities_handles_missing_community_data_gracefully(): void
    {
        // Arrange
        $instance = PlatformInstance::factory()->create(['url' => 'lemmy.world']);
        $account = PlatformAccount::factory()->create([
            'instance_url' => $instance->url,
            'is_active' => true,
            'settings' => ['api_token' => 'test-token']
        ]);

        // Mock LemmyApiService with incomplete community data
        $mockApiService = Mockery::mock(LemmyApiService::class);
        $mockApiService->shouldReceive('listCommunities')
            ->once()
            ->andReturn([
                'communities' => [
                    [
                        'community' => [
                            'id' => 1,
                            'name' => 'minimal',
                            // Missing title, description, etc.
                        ],
                        // Missing counts
                    ]
                ]
            ]);

        $this->app->bind(LemmyApiService::class, function () use ($mockApiService) {
            return $mockApiService;
        });

        // Act
        $response = $this->getJson('/api/v1/platform-channels/communities?platform_instance_id=' . $instance->id);

        // Assert
        $response->assertStatus(200)
            ->assertJson([
                'success' => true,
                'data' => [
                    'communities' => [
                        [
                            'id' => 1,
                            'name' => 'minimal',
                            'title' => null,
                            'description' => null,
                            'nsfw' => false,
                            'local' => false,
                            'subscribers' => 0,
                            'posts' => 0,
                            'display_text' => 'minimal (0 subscribers)'
                        ]
                    ]
                ]
            ]);
    }
}