<?php

namespace Tests\Unit\Services;

use App\Services\DashboardStatsService;
use App\Models\Article;
use App\Models\Feed;
use App\Models\PlatformChannel;
use App\Models\Route;
use App\Models\ArticlePublication;
use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;

class DashboardStatsServiceTest extends TestCase
{
    use RefreshDatabase;

    protected DashboardStatsService $dashboardStatsService;

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

    public function test_get_stats_returns_correct_structure(): void
    {
        $stats = $this->dashboardStatsService->getStats();

        $this->assertIsArray($stats);
        $this->assertArrayHasKey('articles_fetched', $stats);
        $this->assertArrayHasKey('articles_published', $stats);
        $this->assertArrayHasKey('published_percentage', $stats);
    }

    public function test_get_stats_with_today_period(): void
    {
        $feed = Feed::factory()->create();
        $channel = PlatformChannel::factory()->create();
        
        // Create articles for today
        $todayArticle = Article::factory()->create([
            'feed_id' => $feed->id,
            'created_at' => now()
        ]);
        
        // Create publication for today
        ArticlePublication::factory()->create([
            'article_id' => $todayArticle->id,
            'platform_channel_id' => $channel->id,
            'published_at' => now()
        ]);

        $stats = $this->dashboardStatsService->getStats('today');

        $this->assertEquals(1, $stats['articles_fetched']);
        $this->assertEquals(1, $stats['articles_published']);
        $this->assertEquals(100.0, $stats['published_percentage']);
    }

    public function test_get_stats_with_week_period(): void
    {
        $stats = $this->dashboardStatsService->getStats('week');

        $this->assertArrayHasKey('articles_fetched', $stats);
        $this->assertArrayHasKey('articles_published', $stats);
        $this->assertArrayHasKey('published_percentage', $stats);
    }

    public function test_get_stats_with_all_time_period(): void
    {
        $feed = Feed::factory()->create();
        
        // Create articles across different times
        Article::factory()->count(5)->create(['feed_id' => $feed->id]);

        $stats = $this->dashboardStatsService->getStats('all');

        $this->assertEquals(5, $stats['articles_fetched']);
        $this->assertIsFloat($stats['published_percentage']);
    }

    public function test_get_stats_calculates_percentage_correctly(): void
    {
        $feed = Feed::factory()->create();
        $channel = PlatformChannel::factory()->create();
        
        // Create 4 articles
        $articles = Article::factory()->count(4)->create(['feed_id' => $feed->id]);
        
        // Publish 2 of them
        foreach ($articles->take(2) as $article) {
            ArticlePublication::factory()->create([
                'article_id' => $article->id,
                'platform_channel_id' => $channel->id,
                'published_at' => now()
            ]);
        }

        $stats = $this->dashboardStatsService->getStats('all');

        $this->assertEquals(4, $stats['articles_fetched']);
        $this->assertEquals(2, $stats['articles_published']);
        $this->assertEquals(50.0, $stats['published_percentage']);
    }

    public function test_get_stats_handles_zero_articles(): void
    {
        $stats = $this->dashboardStatsService->getStats();

        $this->assertEquals(0, $stats['articles_fetched']);
        $this->assertEquals(0, $stats['articles_published']);
        $this->assertEquals(0.0, $stats['published_percentage']);
    }

    public function test_get_available_periods_returns_correct_options(): void
    {
        $periods = $this->dashboardStatsService->getAvailablePeriods();

        $this->assertIsArray($periods);
        $this->assertArrayHasKey('today', $periods);
        $this->assertArrayHasKey('week', $periods);
        $this->assertArrayHasKey('month', $periods);
        $this->assertArrayHasKey('year', $periods);
        $this->assertArrayHasKey('all', $periods);
        
        $this->assertEquals('Today', $periods['today']);
        $this->assertEquals('All Time', $periods['all']);
    }

    public function test_get_system_stats_returns_correct_structure(): void
    {
        $stats = $this->dashboardStatsService->getSystemStats();

        $this->assertIsArray($stats);
        $this->assertArrayHasKey('total_feeds', $stats);
        $this->assertArrayHasKey('active_feeds', $stats);
        $this->assertArrayHasKey('total_channels', $stats);
        $this->assertArrayHasKey('active_channels', $stats);
        $this->assertArrayHasKey('total_routes', $stats);
        $this->assertArrayHasKey('active_routes', $stats);
    }

    public function test_get_system_stats_counts_correctly(): void
    {
        // Create a single feed, channel, and route to test counting
        $feed = Feed::factory()->create(['is_active' => true]);
        $channel = PlatformChannel::factory()->create(['is_active' => true]);
        $route = Route::factory()->create(['is_active' => true]);

        $stats = $this->dashboardStatsService->getSystemStats();

        // Verify that all stats are properly counted (at least our created items exist)
        $this->assertGreaterThanOrEqual(1, $stats['total_feeds']);
        $this->assertGreaterThanOrEqual(1, $stats['active_feeds']);
        $this->assertGreaterThanOrEqual(1, $stats['total_channels']);
        $this->assertGreaterThanOrEqual(1, $stats['active_channels']);
        $this->assertGreaterThanOrEqual(1, $stats['total_routes']);
        $this->assertGreaterThanOrEqual(1, $stats['active_routes']);
        
        // Verify that active counts are less than or equal to total counts
        $this->assertLessThanOrEqual($stats['total_feeds'], $stats['active_feeds']);
        $this->assertLessThanOrEqual($stats['total_channels'], $stats['active_channels']);
        $this->assertLessThanOrEqual($stats['total_routes'], $stats['active_routes']);
    }

    public function test_get_system_stats_handles_empty_database(): void
    {
        $stats = $this->dashboardStatsService->getSystemStats();

        $this->assertEquals(0, $stats['total_feeds']);
        $this->assertEquals(0, $stats['active_feeds']);
        $this->assertEquals(0, $stats['total_channels']);
        $this->assertEquals(0, $stats['active_channels']);
        $this->assertEquals(0, $stats['total_routes']);
        $this->assertEquals(0, $stats['active_routes']);
    }
}