<?php

namespace App\Console\Commands;

use App\Models\AnalyticsSession;
use App\Models\Event;
use App\Models\PageView;
use App\Models\Website;
use Illuminate\Console\Command;
use Illuminate\Support\Carbon;

class PurgeAnalytics extends Command
{
    protected $signature = 'analytics:purge
        {--website= : Purge only a specific website ID.}
        {--force : Skip confirmation prompt.}';

    protected $description = 'Delete raw analytics data older than each website\'s retention period';

    private const DEFAULT_RETENTION_DAYS = 365;

    public function handle(): int
    {
        $websites = $this->option('website')
            ? Website::where('id', $this->option('website'))->get()
            : Website::all();

        if ($websites->isEmpty()) {
            $this->warn('No websites found.');

            return self::SUCCESS;
        }

        $summary = $websites->map(fn (Website $w) => [
            'id' => $w->id,
            'name' => $w->name,
            'retention' => $this->getRetentionDays($w) . ' days',
            'cutoff' => Carbon::today()->subDays($this->getRetentionDays($w))->toDateString(),
        ])->toArray();

        $this->table(['ID', 'Website', 'Retention', 'Delete before'], $summary);

        if (! $this->option('force') && ! $this->confirm('Proceed with purging old raw data?')) {
            $this->info('Cancelled.');

            return self::SUCCESS;
        }

        foreach ($websites as $website) {
            $this->purgeForWebsite($website);
        }

        $this->info('Purge complete.');

        return self::SUCCESS;
    }

    private function purgeForWebsite(Website $website): void
    {
        $retentionDays = $this->getRetentionDays($website);
        $cutoff = Carbon::today()->subDays($retentionDays);

        $this->info("Purging {$website->name} (data before {$cutoff->toDateString()})...");

        $pvDeleted = PageView::where('website_id', $website->id)
            ->where('viewed_at', '<', $cutoff)
            ->delete();

        $evDeleted = Event::where('website_id', $website->id)
            ->where('occurred_at', '<', $cutoff)
            ->delete();

        $sessDeleted = AnalyticsSession::where('website_id', $website->id)
            ->where('started_at', '<', $cutoff)
            ->delete();

        $this->line("  Deleted: {$pvDeleted} page views, {$evDeleted} events, {$sessDeleted} sessions");
    }

    private function getRetentionDays(Website $website): int
    {
        return $website->settings['data_retention_days'] ?? self::DEFAULT_RETENTION_DAYS;
    }
}