<?php

namespace App\Services;

use App\Models\FollowUp;

class FollowUpReminderService
{
    public function sendDueReminders(): int
    {
        $count = 0;
        FollowUp::with('lead:id,first_name,last_name,company')
            ->where('status', 'pending')
            ->where('scheduled_at', '<=', now())
            ->orderBy('id')
            ->chunkById(100, function ($followUps) use (&$count): void {
                foreach ($followUps as $followUp) {
                    $followUp->update(['is_overdue' => $followUp->scheduled_at->isPast()]);
                    $leadName = $followUp->lead?->full_name ?: ($followUp->lead?->company ?? "لید {$followUp->lead_id}");
                    $notification = NotificationService::sendOnce(
                        $followUp->user_id,
                        $followUp->is_overdue ? 'پیگیری عقب‌افتاده' : 'یادآوری پیگیری',
                        $followUp->is_overdue ? "پیگیری لید {$leadName} عقب افتاده است" : "موعد پیگیری لید {$leadName} رسیده است",
                        $followUp->is_overdue ? 'overdue_follow_up' : 'follow_up',
                        ['follow_up_id' => $followUp->id, 'lead_id' => $followUp->lead_id],
                    );
                    if ($notification) {
                        $count++;
                    }
                }
            });

        return $count;
    }
}