<?php

namespace App\Models;

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

class PrintJob extends Model
{
    use HasFactory;

    protected $fillable = [
        'user_id',
        'job_no',
        'order_id',
        'platform',
        'plugin_code',
        'template_id',
        'print_data',
        'status',
        'priority',
        'retry_count',
        'error_message',
        'printed_by',
        'print_start_time',
        'print_end_time',
    ];

    protected $casts = [
        'print_data' => 'array',
        'priority' => 'integer',
        'retry_count' => 'integer',
        'print_start_time' => 'datetime',
        'print_end_time' => 'datetime',
    ];

    public const STATUS_PENDING = 'pending';
    public const STATUS_QUEUED = 'queued';
    public const STATUS_PRINTING = 'printing';
    public const STATUS_COMPLETED = 'completed';
    public const STATUS_FAILED = 'failed';
    public const STATUS_CANCELLED = 'cancelled';

    public const MAX_RETRY = 3;

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

    public function order(): BelongsTo
    {
        return $this->belongsTo(Order::class, 'order_id');
    }

    public function template(): BelongsTo
    {
        return $this->belongsTo(Template::class, 'template_id');
    }

    /**
     * 生成任务编号
     */
    public static function generateJobNo(): string
    {
        return 'PJ' . date('YmdHis') . str_pad(mt_rand(1, 9999), 4, '0', STR_PAD_LEFT);
    }

    /**
     * 检查是否可以重试
     */
    public function canRetry(): bool
    {
        return $this->status === self::STATUS_FAILED && $this->retry_count < self::MAX_RETRY;
    }

    /**
     * 标记为打印中
     */
    public function markAsPrinting(): void
    {
        $this->update([
            'status' => self::STATUS_PRINTING,
            'print_start_time' => now(),
        ]);
    }

    /**
     * 标记为完成
     */
    public function markAsCompleted(): void
    {
        $this->update([
            'status' => self::STATUS_COMPLETED,
            'print_end_time' => now(),
        ]);
    }

    /**
     * 标记为失败
     */
    public function markAsFailed(string $error): void
    {
        $this->update([
            'status' => self::STATUS_FAILED,
            'error_message' => $error,
            'retry_count' => $this->retry_count + 1,
        ]);
    }

    /**
     * 加入打印队列
     */
    public function queue(): void
    {
        $this->update(['status' => self::STATUS_QUEUED]);
    }

    /**
     * 取消任务
     */
    public function cancel(): void
    {
        $this->update(['status' => self::STATUS_CANCELLED]);
    }
}