<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

class Letter extends Model
{
    use HasFactory, SoftDeletes;

    protected $fillable = [
        'tenant_id',
        'project_id',
        'parent_id',
        'type',
        'subject',
        'content',
        'sender',
        'recipient',
        'date',
        'reference_number',
        'status',
        'created_by',
    ];

    protected $casts = [
        'date' => 'date',
    ];

    public function tenant()
    {
        return $this->belongsTo(Tenant::class);
    }

    public function project()
    {
        return $this->belongsTo(Project::class);
    }

    public function parentLetter()
    {
        return $this->belongsTo(Letter::class, 'parent_id');
    }

    public function replies()
    {
        return $this->hasMany(Letter::class, 'parent_id');
    }

    public function creator()
    {
        return $this->belongsTo(User::class, 'created_by');
    }

    public function attachments()
    {
        return $this->hasMany(LetterAttachment::class);
    }

    public function createdBy()
    {
        return $this->belongsTo(User::class, 'created_by');
    }
}