<?php

namespace App\Services;

use App\Models\Consultation;
use Carbon\Carbon;
use Spatie\IcalendarGenerator\Components\Calendar;
use Spatie\IcalendarGenerator\Components\Event;
use Spatie\IcalendarGenerator\Enums\ParticipationStatus;

class CalendarService
{
    /**
     * Generate an ICS calendar file for a consultation.
     */
    public function generateIcs(Consultation $consultation): string
    {
        $consultation->load('user');

        $startDateTime = Carbon::parse($consultation->booking_date)
            ->setTimeFromTimeString($consultation->booking_time);
        $endDateTime = $startDateTime->copy()->addHour();

        $locale = $consultation->user?->preferred_language ?? 'ar';

        $eventName = $locale === 'ar'
            ? 'استشارة قانونية - مكتب ليبرا للمحاماة'
            : 'Legal Consultation - Libra Law Firm';

        $description = $this->buildDescription($consultation, $locale);

        $event = Event::create()
            ->name($eventName)
            ->description($description)
            ->uniqueIdentifier("consultation-{$consultation->id}@libra.ps")
            ->createdAt(now())
            ->startsAt($startDateTime)
            ->endsAt($endDateTime)
            ->organizer('info@libra.ps', 'Libra Law Firm');

        if ($consultation->user?->email) {
            $event->attendee(
                $consultation->user->email,
                $consultation->user->full_name,
                ParticipationStatus::Accepted
            );
        }

        $calendar = Calendar::create('Libra Law Firm')
            ->productIdentifier('-//Libra Law Firm//Consultation Booking//EN')
            ->event($event);

        return $calendar->get();
    }

    /**
     * Build the event description based on locale.
     */
    private function buildDescription(Consultation $consultation, string $locale): string
    {
        if ($locale === 'ar') {
            $description = "استشارة قانونية مع مكتب ليبرا للمحاماة\n\n";
            $description .= "العميل: {$consultation->user?->full_name}\n";
            $description .= 'التاريخ: '.Carbon::parse($consultation->booking_date)->translatedFormat('l, d M Y')."\n";
            $description .= 'الوقت: '.Carbon::parse($consultation->booking_time)->format('g:i A')."\n";

            if ($consultation->consultation_type?->value === 'paid' && $consultation->payment_amount) {
                $description .= "المبلغ: {$consultation->payment_amount} شيكل\n";
            }

            $description .= "\nللتواصل: info@libra.ps";
        } else {
            $description = "Legal Consultation with Libra Law Firm\n\n";
            $description .= "Client: {$consultation->user?->full_name}\n";
            $description .= 'Date: '.Carbon::parse($consultation->booking_date)->format('l, d M Y')."\n";
            $description .= 'Time: '.Carbon::parse($consultation->booking_time)->format('g:i A')."\n";

            if ($consultation->consultation_type?->value === 'paid' && $consultation->payment_amount) {
                $description .= "Amount: {$consultation->payment_amount} ILS\n";
            }

            $description .= "\nContact: info@libra.ps";
        }

        return $description;
    }
}