<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Support\Facades\Storage;

class TicketAttachment extends Model
{
    use HasFactory;

    protected $table    = 'ticket_attachments';
    protected $fillable = ['ticket_id', 'ticket_update_id', 'user_id', 'file_path', 'original_file_name', 'mime_type', 'size', 'description', 'metadata'];

    protected $casts = [
        'size'     => 'integer',
        'metadata' => 'array',
    ];

    public function ticket(): BelongsTo
    {
        return $this->belongsTo(Ticket::class, 'ticket_id', 'id');
    }

    public function ticketUpdate(): BelongsTo
    {
        return $this->belongsTo(TicketUpdate::class, 'ticket_update_id', 'id');
    }

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class, 'user_id', 'id');
    }

    public function resolvedMimeType(): string
    {
        return self::normalizeMimeType(
            (string) ($this->mime_type ?? ''),
            (string) ($this->original_file_name ?? ''),
            (string) ($this->file_path ?? '')
        );
    }

    public function isImage(): bool
    {
        return str_starts_with($this->resolvedMimeType(), 'image/');
    }

    public function isPdf(): bool
    {
        return $this->resolvedMimeType() === 'application/pdf';
    }

    public static function normalizeMimeType(?string $mimeType, ?string $originalName = null, ?string $path = null): string
    {
        $mime = strtolower(trim((string) $mimeType));

        if ($mime !== '' && $mime !== 'application/octet-stream') {
            return $mime;
        }

        $extension = strtolower((string) pathinfo((string) ($originalName ?: $path), PATHINFO_EXTENSION));

        $fromExtension = match ($extension) {
            'jpg', 'jpeg' => 'image/jpeg',
            'png'   => 'image/png',
            'webp'  => 'image/webp',
            'gif'   => 'image/gif',
            'bmp'   => 'image/bmp',
            'pdf'   => 'application/pdf',
            'txt'   => 'text/plain',
            'doc'   => 'application/msword',
            'docx'  => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
            'xls'   => 'application/vnd.ms-excel',
            'xlsx'  => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
            default => '',
        };

        if ($fromExtension !== '') {
            return $fromExtension;
        }

        $diskPath = trim((string) $path);
        if ($diskPath !== '') {
            try {
                $detected = Storage::disk('public')->mimeType($diskPath);
                if (is_string($detected) && trim($detected) !== '') {
                    return strtolower(trim($detected));
                }
            } catch (\Throwable) {
            }
        }

        return 'application/octet-stream';
    }
}