<?php

namespace app\flow\strategies;

use app\config\Config;
use app\flow\config\TimeValidationConfig;
use app\flow\ProcessContext;
use app\flow\nodes\ProcessNodeInterface;
use app\flow\VoiceMessage;
use app\repository\ProcessDurationRepository;
use app\utils\Logger;

/**
 * 时间验证策略
 * 验证步骤时间是否满足要求
 */
class TimeValidationStrategy extends AbstractStrategy
{
    protected string $phase = 'before';

    protected TimeValidationConfig $timeValidationConfig;

    /**
     * 已从数据库加载的时长缓存：[processType => [stepName => seconds]]
     */
    private array $dbDurationCache = [];

    public function __construct(TimeValidationConfig $config)
    {
        parent::__construct([]);
        $this->timeValidationConfig = $config;
        Logger::debug("TimeValidationStrategy 初始化完成");
    }

    /**
     * 从数据库获取步骤时长（按流程类型精确匹配）
     * 优先级：数据库记录 > 构造时配置 > 内置 fallback
     */
    protected function getDurationFromDb(string $stepCode, string $processType): int
    {
        if (empty($processType)) {
            return $this->timeValidationConfig->getDuration($stepCode, $processType);
        }

        // 整批加载并缓存，减少查询次数
        if (!isset($this->dbDurationCache[$processType])) {
            $this->dbDurationCache[$processType] = ProcessDurationRepository::new()
                ->getDurationsByProcessType($processType);
        }

        $dbValue = $this->dbDurationCache[$processType][$stepCode] ?? null;
        if ($dbValue !== null) {
            return $dbValue;
        }

        // fallback：返回配置中的默认值
        return $this->timeValidationConfig->getDuration($stepCode);
    }

    /**
     * 执行时间验证
     */
    protected function doExecute(ProcessContext $context, ProcessNodeInterface $node): ProcessContext
    {
        $stepCode = $node->getCode();
        $currentStep = $context->currentStep;
        $processType = $context->processType;

        Logger::debug("开始执行时间验证策略，步骤：{$stepCode}，流程类型：{$processType}");
        $configDuration = $this->timeValidationConfig->getDuration($stepCode,$processType);

        Logger::debug("步骤：{$stepCode}，流程类型：{$processType}，配置时长：{$configDuration}s");
        if ($configDuration > 0) {
            // 配置中有明确时长，直接使用
            $requiredDuration = $configDuration;
        } else {
            Logger::debug("步骤：{$stepCode}，流程类型：{$processType}，无配置时长，从数据库查询");
            // 从数据库按流程类型精确查询
            $requiredDuration = $this->getDurationFromDb($stepCode, $context->processType);
            if ($requiredDuration > 0) {
                $context->setStepDuration($stepCode, $requiredDuration);
            } else {
                // 最后使用上下文已缓存值
                $requiredDuration = $context->getStepDuration($stepCode);
            }
        }

        // 无需时间验证，直接放行
        if ($requiredDuration <= 0) {
            return $context;
        }

        // 获取上次该步骤的操作时间
        $duration = $context->duration;

        // 没有上次记录（第一次操作），允许通过
        if (empty($duration)) {
            Logger::debug("步骤：{$stepCode}，流程类型：{$processType}，无上次记录，允许通过");
            return $context;
        }

        if ($duration < $requiredDuration) {
            Logger::debug("[{$stepCode}] 时间不足，剩余: {}s", [$requiredDuration - $duration]);
            if (Config::getInstance()->blockMode){
                $voice = VoiceMessage::NOT_ENOUGH_TIME->value;
                $voice = str_replace('{step}', $stepCode, $voice);
                $voice = str_replace('{time}', $requiredDuration - $duration, $voice);
                $context->setCustomError($voice);
            }
            return $context;
        }

        return $context;
    }

    /**
     * 判断策略是否适用
     * 只有在 timeValidationConfig 中登记的步骤才参与时间验证
     */
    public function isApplicable(ProcessContext $context, ProcessNodeInterface $node): bool
    {
        if ($context->currentStep != $context->previousAction->process_name) return false;
        if (!$this->timeValidationConfig->hasStep($node->getCode(), $context->processType)) return false;
        return true;
    }

    /**
     * 获取策略名称
     */
    public function getName(): string
    {
        return '时间验证策略';
    }

    /**
     * 手动设置步骤时长（覆盖 fallback，不影响数据库缓存）
     */
    public function setStepDuration(string $stepCode, int $seconds): self
    {
        $this->timeValidationConfig->setDuration($stepCode, $seconds);
        return $this;
    }
}