<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\MorphTo;

class FileAttachment extends Model
{
    use HasFactory;

    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'file_attachments';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'file_id',
        'label',
        'attachable_type',
        'attachable_id',
        'sort_order',
        'created_at',
        'updated_at',
    ];

    /**
     * The attributes that should be cast.
     *
     * @var array
     */
    protected $casts = [
        'sort_order' => 'integer',
    ];

    /**
     * Get the parent attachable model (polymorphic).
     */
    public function attachable(): MorphTo
    {
        return $this->morphTo();
    }

    /**
     * Get the file associated with the attachment.
     */
    public function file(): BelongsTo
    {
        return $this->belongsTo(File::class);
    }

    /**
     * Get the intervention associated with the attachment (legacy support).
     */
    public function intervention(): BelongsTo
    {
        return $this->belongsTo(Intervention::class, 'attachable_id')->where('attachable_type', Intervention::class);
    }

    /**
     * Get the client associated with the attachment.
     */
    public function client(): BelongsTo
    {
        return $this->belongsTo(Client::class, 'attachable_id')->where('attachable_type', Client::class);
    }

    /**
     * Get the deceased associated with the attachment.
     */
    public function deceased(): BelongsTo
    {
        return $this->belongsTo(Deceased::class, 'attachable_id')->where('attachable_type', Deceased::class);
    }

    /**
     * Scope to filter by attachable type.
     */
    public function scopeOfType($query, string $type)
    {
        return $query->where('attachable_type', $type);
    }

    /**
     * Scope to filter by attachable model.
     */
    public function scopeFor($query, Model $model)
    {
        return $query->where('attachable_type', get_class($model))
                    ->where('attachable_id', $model->getKey());
    }

    /**
     * Get the display name of the attached model.
     */
    public function getAttachableNameAttribute(): string
    {
        return $this->attachable?->name ?? $this->attachable?->file_name ?? 'Unknown';
    }

    /**
     * Get the URL for downloading the attached file.
     */
    public function getDownloadUrlAttribute(): string
    {
        return url('/api/files/' . $this->file_id . '/download');
    }

    /**
     * Check if this attachment belongs to an intervention.
     */
    public function isForIntervention(): bool
    {
        return $this->attachable_type === Intervention::class;
    }

    /**
     * Check if this attachment belongs to a client.
     */
    public function isForClient(): bool
    {
        return $this->attachable_type === Client::class;
    }

    /**
     * Check if this attachment belongs to a deceased.
     */
    public function isForDeceased(): bool
    {
        return $this->attachable_type === Deceased::class;
    }
}