<?php

namespace App\Domains\Event\Services;

use App\Domains\Event\Enums\EventDateChangeType;
use App\Domains\Event\Models\EventDate;
use App\Domains\Event\Models\EventDateChange;
use Illuminate\Support\Collection;

class EventDateInfoFormatter
{
    /** @param Collection<int, EventDateChange> $changes */
    public function format(EventDate $eventDate, Collection $changes): ?string
    {
        $messages = collect();

        if ($eventDate->suspended_at !== null) {
            $messages->push('Esta fecha fue cancelada.');
        }

        $sourceDates = $changes
            ->where('change_type', EventDateChangeType::Rescheduled)
            ->where('destination_event_date_id', $eventDate->getKey())
            ->pluck('previous_date')
            ->filter()
            ->map(fn ($date): string => $date->format('d/m/Y'))
            ->unique()
            ->values();

        if ($sourceDates->isNotEmpty()) {
            $verb = $sourceDates->count() === 1 ? 'se reprogramó' : 'se reprogramaron';
            $messages->push("{$sourceDates->join(', ', ' y ')} {$verb} para este día.");
        }

        return $messages->isEmpty() ? null : $messages->join(' ');
    }
}