<?php

namespace app\flow\context\bean;

use app\config\Config;
use app\repository\EctActionsRepository;

/**
 * 批次号值对象
 * 封装批次号相关操作（不可变）
 */
readonly class BatchNo
{
    public function __construct(
        /** 批次号值 */
        public string $value = '',
    )
    {
    }

    /**
     * 创建空批次号
     */
    public static function empty(): self
    {
        return new self(value: '');
    }

    /**
     * 从字符串创建
     */
    public static function fromString(string $value): self
    {
        return new self(value: $value);
    }

    /**
     * 生成新批次号
     */
    public static function generate(?string $machineId = null): self
    {
        $config = Config::getInstance();
        $machineId = $machineId ?? $config->machineId;

        $existingBatchNo = EctActionsRepository::new()->findTodayActiveBatchNo($machineId);

        $datePart = date('Ymd');
        $sequence = 1;

        if (!empty($existingBatchNo)) {
            $existingDatePart = substr($existingBatchNo, 0, 8);
            $existingSequence = substr($existingBatchNo, 10, 4);

            if ($existingDatePart === $datePart && is_numeric($existingSequence)) {
                $sequence = (int)$existingSequence + 1;
            }
        }

        $sequencePart = str_pad($sequence, 4, '0', STR_PAD_LEFT);
        return new self(value: $datePart . $machineId . $sequencePart);
    }

    /**
     * 解析批次号结构
     *
     * @return array{date: string, machineId: string, sequence: int, dateFormatted: string}
     */
    public function parse(): array
    {
        if (!$this->isValid()) {
            return [
                'date' => '',
                'machineId' => '',
                'sequence' => 0,
                'dateFormatted' => '',
            ];
        }

        $datePart = substr($this->value, 0, 8);
        $machineId = substr($this->value, 8, 2);
        $sequence = (int)substr($this->value, 10, 4);

        return [
            'date' => $datePart,
            'machineId' => $machineId,
            'sequence' => $sequence,
            'dateFormatted' => substr($datePart, 0, 4) . '-' . substr($datePart, 4, 2) . '-' . substr($datePart, 6, 2),
        ];
    }

    /**
     * 解析批次号结构
     * @deprecated
     * @return array{date: string, machineId: string, sequence: int, dateFormatted: string}
     */
    public static function parseBatchNo(string $batchNo): array
    {
        $batch = BatchNo::fromString($batchNo);
        if (!$batch->isValid()) {
            throw new \InvalidArgumentException('Invalid batch string: ' . $batchNo);
        }
        return $batch->parse();
    }

    /**
     * 验证批次号格式是否有效
     */
    public function isValid(): bool
    {
        // 批次号格式: YYYYMMDD + 机器ID(2位) + 序号(4位) = 14位
        if (strlen($this->value) !== 14) {
            return false;
        }

        $datePart = substr($this->value, 0, 8);
        $sequencePart = substr($this->value, 10, 4);

        // 验证日期部分
        if (!is_numeric($datePart)) {
            return false;
        }

        // 验证序号部分
        if (!is_numeric($sequencePart)) {
            return false;
        }

        return true;
    }

    /**
     * 是否为空批次号
     */
    public function isEmpty(): bool
    {
        return empty($this->value);
    }

    /**
     * 获取日期部分
     */
    public function getDateStr(): string
    {
        $parsed = $this->parse();
        return $parsed['dateFormatted'];
    }


    /**
     * 获取时间戳
     * @return int|false
     */
    public function getTimestamp(): int|false
    {
        $parsed = $this->parse();
        return strtotime($parsed['dateFormatted']);
    }

    /**
     * 获取机器ID
     */
    public function getMachineId(): string
    {
        $parsed = $this->parse();
        return $parsed['machineId'];
    }

    /**
     * 获取序号
     */
    public function getSequence(): int
    {
        $parsed = $this->parse();
        return $parsed['sequence'];
    }

    /**
     * 是否是今天的批次号
     */
    public function isToday(): bool
    {
        if (!$this->isValid()) {
            return false;
        }
        $datePart = substr($this->value, 0, 8);
        return $datePart === date('Ymd');
    }

    /**
     * 转换为字符串
     */
    public function __toString(): string
    {
        return $this->value;
    }
}