<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Cache;
use App\Services\CaldavService;
use App\Models\Todo;

class CaldavSyncCommand extends Command
{
    protected $signature = 'caldav:sync';
    protected $description = 'Sync CalDAV VTODOs into local todos table';

    public function handle(CaldavService $service)
    {
        // only run every 5 minutes although the task is called every minute
        $cacheKey = 'caldav_sync_last_run';
        if (\Illuminate\Support\Facades\Cache::has($cacheKey)) {
            Log::info('CalDAV sync Throttled');
            return 0;
        }
        Cache::put($cacheKey, true, 300);

        Log::info('Running CalDAV sync');
        $this->info('Starting CalDAV sync');

        $todos = $service->getTodos();

        $count = 0;
        foreach ($todos as $todo) {
            Todo::upsert($todo->attributesToArray(), 'id');
            $count++;
        }
        // Collect hrefs/URLs returned by the CalDAV server so we can remove local
        // todos that belong to this calendar but were deleted on the server.
        $hrefs = array_values(array_filter(array_map(function ($t) {
            return $t->url ?? null;
        }, $todos)));

        // Remove local todos that have a URL in this calendar but weren't returned
        // by the server (i.e. they were deleted remotely). Scope deletion by
        // calendar prefix to avoid touching other calendars.
        $calendarId = $service->getCalendarId();
        $username = config('caldav.username') ?? '';
        $calendarPrefix = 'calendars/' . $username . '/' . $calendarId;

        if ($calendarId && $username) {
            Todo::whereNotNull('url')
                ->where('url', 'like', '%' . $calendarPrefix . "%")
                ->whereNotIn('url', $hrefs ?: [''])
                ->delete();
        }

        // Remove old todos
        Todo::where('status', 'COMPLETED')
            ->where('last_modified', '<', now()->subDays(30)) // TODO: get from settings
            ->where('due_date', '<', now()->subDays(30))
            ->delete();

        Log::info("Synced " . count($todos) . " todos.");
        $this->info("Synced " . count($todos) . " todos.");
        return 0;
    }
}