<?php

use App\Models\ArtworkMetricSnapshotHourly;
use App\Services\Metrics\ArtworkHourlySnapshotWindow;
use App\Services\Studio\StudioMetricsService;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;

function snapshotArtworkForUser(int $userId): \App\Models\Artwork
{
    return \App\Models\Artwork::withoutEvents(fn () => \App\Models\Artwork::factory()->create([
        'user_id' => $userId,
        'is_approved' => true,
        'is_public' => true,
        'published_at' => now()->subDays(40),
        'deleted_at' => null,
    ]));
}

function insertHourlySnapshot(int $artworkId, $bucketHour, int $views, int $favourites = 0, int $shares = 0, int $comments = 0, int $downloads = 0): void
{
    ArtworkMetricSnapshotHourly::create([
        'artwork_id' => $artworkId,
        'bucket_hour' => $bucketHour,
        'views_count' => $views,
        'downloads_count' => $downloads,
        'favourites_count' => $favourites,
        'comments_count' => $comments,
        'shares_count' => $shares,
    ]);
}

it('computes 30d views as max-min per artwork not sum of cumulatives', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = snapshotArtworkForUser($user->id);

    insertHourlySnapshot($artwork->id, now()->subDays(10)->startOfHour(), 100, 10, 1, 2, 4);
    insertHourlySnapshot($artwork->id, now()->subDays(1)->startOfHour(), 130, 16, 4, 5, 9);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(30)
        ->and($window['favourites'])->toBe(6)
        ->and($window['shares'])->toBe(3)
        ->and($window['comments'])->toBe(3)
        ->and($window['downloads'])->toBe(5)
        ->and($window['views'])->not->toBe(230);
});

it('sums window deltas across a creator\'s artworks', function () {
    $user = \App\Models\User::factory()->create();
    $a = snapshotArtworkForUser($user->id);
    $b = snapshotArtworkForUser($user->id);

    insertHourlySnapshot($a->id, now()->subDays(5)->startOfHour(), 50);
    insertHourlySnapshot($a->id, now()->subHour()->startOfHour(), 80);
    insertHourlySnapshot($b->id, now()->subDays(5)->startOfHour(), 10);
    insertHourlySnapshot($b->id, now()->subHour()->startOfHour(), 15);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(35);
});

it('does not treat zero growth as lifetime totals', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = snapshotArtworkForUser($user->id);

    DB::table('artwork_stats')->updateOrInsert(
        ['artwork_id' => $artwork->id],
        ['views' => 9999, 'favorites' => 50, 'shares_count' => 7]
    );

    insertHourlySnapshot($artwork->id, now()->subDays(2)->startOfHour(), 40);
    insertHourlySnapshot($artwork->id, now()->subHour()->startOfHour(), 40);

    Cache::flush();
    $kpis = app(StudioMetricsService::class)->getDashboardKpis($user->id);

    expect($kpis['views_30d'])->toBe(0)
        ->and($kpis['favourites_30d'])->toBe(0)
        ->and($kpis['snapshot_window']['window_complete'])->toBeFalse();
});

it('marks a short table history as an incomplete 30-day window', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = snapshotArtworkForUser($user->id);

    insertHourlySnapshot($artwork->id, now()->subDays(2)->startOfHour(), 10);
    insertHourlySnapshot($artwork->id, now()->subHour()->startOfHour(), 18);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(8)
        ->and($window['window_complete'])->toBeFalse()
        ->and($window['table_coverage_days'])->toBeLessThan(30)
        ->and($window['requested_days'])->toBe(30);
});

it('counts all views for artwork created during the window', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = \App\Models\Artwork::withoutEvents(fn () => \App\Models\Artwork::factory()->create([
        'user_id' => $user->id,
        'is_approved' => true,
        'is_public' => true,
        'published_at' => now()->subDays(3),
        'created_at' => now()->subDays(3),
        'deleted_at' => null,
    ]));

    insertHourlySnapshot($artwork->id, now()->subDays(3)->startOfHour(), 40);
    insertHourlySnapshot($artwork->id, now()->subHour()->startOfHour(), 90);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(90);
});

it('uses a pre-window snapshot as baseline for older artwork', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = snapshotArtworkForUser($user->id);

    insertHourlySnapshot($artwork->id, now()->subDays(30)->subHour()->startOfHour(), 200);
    insertHourlySnapshot($artwork->id, now()->subDays(10)->startOfHour(), 220);
    insertHourlySnapshot($artwork->id, now()->subHour()->startOfHour(), 250);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(50);
});

it('does not treat a single in-window snapshot of older artwork as lifetime views', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = snapshotArtworkForUser($user->id);

    insertHourlySnapshot($artwork->id, now()->subDays(2)->startOfHour(), 400);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(0);
});

it('treats a single snapshot of a new artwork as growth from zero', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = \App\Models\Artwork::withoutEvents(fn () => \App\Models\Artwork::factory()->create([
        'user_id' => $user->id,
        'is_approved' => true,
        'is_public' => true,
        'published_at' => now()->subHours(2),
        'created_at' => now()->subHours(2),
        'deleted_at' => null,
    ]));

    insertHourlySnapshot($artwork->id, now()->subHour()->startOfHour(), 12);

    $window = app(ArtworkHourlySnapshotWindow::class)->userWindow($user->id, 30);

    expect($window['views'])->toBe(12);
});

it('ignores creator-journey snapshots older than the retention window', function () {
    $user = \App\Models\User::factory()->create();
    $artwork = snapshotArtworkForUser($user->id);

    insertHourlySnapshot($artwork->id, now()->subDays(40)->startOfHour(), 10, 0, 0, 0, 1);
    insertHourlySnapshot($artwork->id, now()->subDays(39)->startOfHour(), 10, 0, 0, 0, 500);

    $lookbackDays = (int) config('metrics.hourly_snapshot_retention_days', 30);
    $count = DB::table('artwork_metric_snapshots_hourly')
        ->where('artwork_id', $artwork->id)
        ->where('bucket_hour', '>=', now()->subDays($lookbackDays))
        ->count();

    expect($count)->toBe(0);
});