<?php

namespace App\Services;

use App\Models\FollowUp;
use App\Models\Notification as NotificationModel;
use App\Models\Setting;
use App\Models\User;

class NotificationService
{
    public static function send(int $userId, string $title, string $message, string $type = 'info', ?array $data = null): NotificationModel
    {
        if (! self::enabled($type)) {
            return new NotificationModel;
        }

        return NotificationModel::create([
            'user_id' => $userId,
            'title' => $title,
            'message' => $message,
            'type' => $type,
            'data' => $data,
            'is_read' => false,
        ]);
    }

    public static function sendOnce(int $userId, string $title, string $message, string $type = 'info', ?array $data = null): ?NotificationModel
    {
        $exists = NotificationModel::where('user_id', $userId)
            ->where('type', $type)
            ->where('data->follow_up_id', $data['follow_up_id'] ?? null)
            ->whereDate('created_at', now()->toDateString())
            ->exists();

        return $exists ? null : self::send($userId, $title, $message, $type, $data);
    }

    public static function notifyAssignment(int $userId, string $leadName, ?int $leadId = null, ?string $eventKey = null): void
    {
        if (! self::enabled('assignment')) {
            return;
        }

        $attributes = [
            'user_id' => $userId,
            'title' => 'لید جدید',
            'message' => "لید {$leadName} به شما اختصاص داده شد",
            'type' => 'assignment',
            'data' => $leadId ? ['lead_id' => $leadId, 'url' => "/leads/{$leadId}"] : null,
            'is_read' => false,
        ];

        if ($eventKey) {
            NotificationModel::firstOrCreate(['idempotency_key' => $eventKey], $attributes);
        } else {
            NotificationModel::create($attributes);
        }
    }

    public static function notifyFollowUpReminder(int $userId, string $leadName, ?int $followUpId = null): void
    {
        self::send($userId, 'یادآوری پیگیری', "موعد پیگیری لید {$leadName} رسیده است", 'follow_up', $followUpId ? [
            'follow_up_id' => $followUpId,
            'url' => "/follow-ups?follow_up={$followUpId}",
        ] : null);
    }

    public static function notifyFollowUpAssigned(FollowUp $followUp, string $leadName, User $actor): void
    {
        if ($followUp->user_id === $actor->id) {
            return;
        }

        self::send(
            $followUp->user_id,
            'پیگیری جدید به شما واگذار شد',
            "پیگیری لید {$leadName} برای شما ثبت شد",
            'follow_up',
            [
                'follow_up_id' => $followUp->id,
                'url' => "/follow-ups?follow_up={$followUp->id}",
                'actor' => ['id' => $actor->id, 'name' => $actor->name],
            ],
        );
    }

    public static function notifyFeedback(int $userId, string $agentName): void
    {
        self::send($userId, 'بازخورد جدید', 'بازخورد جدیدی برای شما ثبت شده است', 'feedback');
    }

    public static function notifyReassignment(int $userId, string $leadName): void
    {
        self::send($userId, 'تغییر وضعیت لید', "لید {$leadName} دوباره به شما اختصاص داده شد", 'reassignment');
    }

    public static function notifyToAllAgents(string $title, string $message, string $type = 'system'): void
    {
        $agents = User::role('agent')->get();
        foreach ($agents as $agent) {
            self::send($agent->id, $title, $message, $type);
        }
    }

    private static function enabled(string $type): bool
    {
        if (Setting::where('key', 'in_app_notifications_enabled')->value('value') === 'false') {
            return false;
        }

        return match ($type) {
            'assignment', 'reassignment' => Setting::where('key', 'assigned_lead_notification_enabled')->value('value') !== 'false',
            'follow_up' => Setting::where('key', 'follow_up_notification_enabled')->value('value') !== 'false',
            'overdue_follow_up' => Setting::where('key', 'overdue_notification_enabled')->value('value') !== 'false',
            default => true,
        };
    }
}