<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;

class NotificationCheckCalibrationDue extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'notifications:check-calibration-due';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Check calibration logs for equipment with calibration due within 20 days or overdue and send notifications.';

    /**
     * Execute the console command.
     *
     * @return int
     */
    public function handle()
    {
        $startTime = microtime(true);
        $commandName = $this->signature;

        logNotificationStart($commandName);
        $this->info('Checking Calibration Log for upcoming/overdue calibrations...');

        $notificationCode = 'notification_calibration_due_soon';

        try {
            // Run at most every 5 minutes
            if (!shouldCheckNotification($notificationCode)) {
                $this->info('Skipping: last calibration notification was sent recently.');
                return 0;
            }

            $lastCheck = getLastCheckTimestamp($notificationCode);

            $today = now()->startOfDay();
            $limitDate = $today->copy()->addDays(20);

            $query = DB::table('calibration_logs')
                ->whereNotNull('calibration_due_date')
                ->whereDate('calibration_due_date', '<=', $limitDate->toDateString());

            // Optional: skip records explicitly marked as completed
            $query->where(function ($q) {
                $q->whereNull('status')
                  ->orWhereNotIn('status', ['Completed']);
            });

            if ($lastCheck !== null) {
                $query->where(function ($q) use ($lastCheck) {
                    $q->where('created_at', '>', $lastCheck)
                      ->orWhere('updated_at', '>', $lastCheck);
                });

                $alreadyNotifiedIds = getAlreadyNotifiedIds($notificationCode);
                if (!empty($alreadyNotifiedIds)) {
                    $query->whereNotIn('id', $alreadyNotifiedIds);
                }
            }

            $ids = $query->pluck('id')->toArray();

            if (empty($ids)) {
                $this->info('No new calibration records found for notification.');
                logNotificationComplete($commandName, 0, 0, 0, microtime(true) - $startTime);
                return 0;
            }

            $filterParams = [
                'table' => 'calibration_logs',
                'conditions' => [],
            ];

            if ($lastCheck !== null) {
                $existingIds = getAlreadyNotifiedIds($notificationCode);
                if (!empty($existingIds)) {
                    $allIds = array_values(array_unique(array_merge($existingIds, $ids)));
                    $newIds = array_diff($ids, $existingIds);

                    if (empty($newIds)) {
                        $this->info('Skipping: no new calibration records since last notification.');
                        logNotificationComplete($commandName, 0, count($allIds), 0, microtime(true) - $startTime);
                        return 0;
                    }

                    $filterParams['conditions']['id'] = $allIds;
                } else {
                    $filterParams['conditions']['id'] = $ids;
                }
            } else {
                $filterParams['conditions']['id'] = $ids;
            }

            if ($lastCheck !== null && isNotificationDuplicate($notificationCode, $filterParams)) {
                $this->info('Skipping: duplicate calibration notification with same filter params.');
                logNotificationComplete($commandName, 0, count($filterParams['conditions']['id']), 0, microtime(true) - $startTime);
                return 0;
            }

            $recordCount = count($filterParams['conditions']['id']);
            $newCount = $lastCheck !== null
                ? count(array_diff($ids, getAlreadyNotifiedIds($notificationCode)))
                : $recordCount;

            $messageTemplate = '%d equipment item(s) have calibration due within 20 days or are already overdue. Please review the Calibration Log module.';

            $sent = sendBatchNotificationWithFilter(
                $notificationCode,
                'Calibration Due Soon',
                $messageTemplate,
                $filterParams,
                $recordCount
            );

            $duration = microtime(true) - $startTime;
            logNotificationComplete($commandName, $sent, $recordCount, $newCount, $duration);

            $this->info("Calibration notifications sent: {$sent} (records: {$recordCount}, new: {$newCount}).");

            return 0;
        } catch (\Throwable $e) {
            $duration = microtime(true) - $startTime;
            logNotificationError($commandName, $e->getMessage(), [
                'file' => $e->getFile(),
                'line' => $e->getLine(),
                'duration' => $duration,
            ]);

            $this->error('Error: ' . $e->getMessage());
            return 1;
        }
    }
}