<?php

declare(strict_types=1);

use App\Services\Recommendations\FeedOfflineEvaluationService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Tests\TestCase;

uses(TestCase::class, RefreshDatabase::class);

it('evaluates objective metrics for an algo from feed_daily_metrics', function () {
    $metricDate = now()->subDay()->toDateString();

    DB::table('feed_daily_metrics')->insert([
        'metric_date' => $metricDate,
        'algo_version' => 'clip-cosine-v1',
        'source' => 'personalized',
        'impressions' => 100,
        'clicks' => 20,
        'saves' => 8,
        'ctr' => 0.2,
        'save_rate' => 0.4,
        'dwell_0_5' => 3,
        'dwell_5_30' => 7,
        'dwell_30_120' => 6,
        'dwell_120_plus' => 4,
        'created_at' => now(),
        'updated_at' => now(),
    ]);

    $result = app(FeedOfflineEvaluationService::class)->evaluateAlgo('clip-cosine-v1', $metricDate, $metricDate);

    expect((string) $result['algo_version'])->toBe('clip-cosine-v1');
    expect((float) $result['ctr'])->toBe(0.2);
    expect((float) $result['save_rate'])->toBe(0.4);
    expect((float) $result['long_dwell_share'])->toBe(0.5);
    expect((float) $result['bounce_rate'])->toBe(0.15);
    expect((float) $result['objective_score'])->toBeGreaterThan(0);
});

it('compares baseline vs candidate with delta and lift', function () {
    $metricDate = now()->subDay()->toDateString();

    DB::table('feed_daily_metrics')->insert([
        [
            'metric_date' => $metricDate,
            'algo_version' => 'clip-cosine-v1',
            'source' => 'personalized',
            'impressions' => 100,
            'clicks' => 20,
            'saves' => 6,
            'ctr' => 0.2,
            'save_rate' => 0.3,
            'dwell_0_5' => 4,
            'dwell_5_30' => 8,
            'dwell_30_120' => 5,
            'dwell_120_plus' => 3,
            'created_at' => now(),
            'updated_at' => now(),
        ],
        [
            'metric_date' => $metricDate,
            'algo_version' => 'clip-cosine-v2',
            'source' => 'personalized',
            'impressions' => 100,
            'clicks' => 25,
            'saves' => 10,
            'ctr' => 0.25,
            'save_rate' => 0.4,
            'dwell_0_5' => 3,
            'dwell_5_30' => 8,
            'dwell_30_120' => 8,
            'dwell_120_plus' => 6,
            'created_at' => now(),
            'updated_at' => now(),
        ],
    ]);

    $comparison = app(FeedOfflineEvaluationService::class)
        ->compareBaselineCandidate('clip-cosine-v1', 'clip-cosine-v2', $metricDate, $metricDate);

    expect((float) $comparison['delta']['objective_score'])->toBeGreaterThan(0.0);
    expect((float) $comparison['delta']['ctr'])->toBeGreaterThan(0.0);
    expect((float) $comparison['delta']['save_rate'])->toBeGreaterThan(0.0);
});

it('treats save_rate as informational when configured', function () {
    $metricDate = now()->subDay()->toDateString();

    config()->set('discovery.evaluation.objective_weights', [
        'ctr' => 0.45,
        'save_rate' => 0.35,
        'long_dwell_share' => 0.25,
        'bounce_rate_penalty' => 0.15,
    ]);
    config()->set('discovery.evaluation.save_rate_informational', true);

    DB::table('feed_daily_metrics')->insert([
        'metric_date' => $metricDate,
        'algo_version' => 'clip-cosine-v1',
        'source' => 'personalized',
        'impressions' => 100,
        'clicks' => 20,
        'saves' => 8,
        'ctr' => 0.2,
        'save_rate' => 0.4,
        'dwell_0_5' => 3,
        'dwell_5_30' => 7,
        'dwell_30_120' => 6,
        'dwell_120_plus' => 4,
        'created_at' => now(),
        'updated_at' => now(),
    ]);

    $result = app(FeedOfflineEvaluationService::class)->evaluateAlgo('clip-cosine-v1', $metricDate, $metricDate);

    expect((float) $result['save_rate'])->toBe(0.4);
    expect((float) $result['objective_score'])->toBe(0.226471);
});