import type { CompetitionData } from '@/views/user/types'
import { defineStore } from 'pinia'
import { computed, ref } from 'vue'
import { useRouterPush } from '@/hooks/common/router'
import { AudioController } from '@/utils/audio'
import { mockData } from '@/views/user/data/mock'

export const useCompetitionStore = defineStore('competition', () => {
  const { routerPushByKey } = useRouterPush()

  // --- State ---
  const data = ref<CompetitionData>(mockData)
  const currentStep = ref(0) // Node 索引
  const subStep = ref(0) // Question 索引
  const timeLeft = ref(0)
  const timerInterval = ref<number | null>(null)

  // 音效控制器 (支持自定义音频文件，例如：{ start: '/audio/start.mp3' })
  const audioController = new AudioController()

  // --- Getters ---
  const currentNode = computed(() => data.value.nodes[currentStep.value])

  const currentQuestion = computed(() => {
    const questions = currentNode.value?.questions || []
    return questions[subStep.value] || questions[0]
  })

  const isLastQuestionInNode = computed(() => {
    if (!currentNode.value)
      return true
    return subStep.value >= currentNode.value.questions.length - 1
  })

  const isLastNode = computed(() => {
    return currentStep.value >= data.value.nodes.length - 1
  })

  // --- Actions ---

  function initData() {
    // 这里可以重置或者重新拉取数据
    // data.value = ...
    resetProgress()
  }

  function resetProgress() {
    currentStep.value = 0
    subStep.value = 0
    stopTimer()
  }

  // --- Audio Helpers ---
  // 音频相关逻辑已抽离到 @/utils/audio.ts

  /**
   * 启动倒计时定时器
   */
  function startTimer() {
    stopTimer()
    if (!currentNode.value)
      return

    timeLeft.value = currentNode.value.config.timeLimit
    audioController.play('start') // 播放开始音效

    timerInterval.value = window.setInterval(() => {
      if (timeLeft.value > 0) {
        timeLeft.value--
        // 剩余5秒播放倒计时音效
        if (timeLeft.value <= 5) {
          audioController.play('tick')
        }
      }
      else {
        stopTimer()
        // 时间到，自动进入解析页
        routerPushByKey('user_analysis')
      }
    }, 1000)
  }

  function stopTimer() {
    if (timerInterval.value) {
      clearInterval(timerInterval.value)
      timerInterval.value = null
    }
  }

  /**
   * 进入下一题或下一环节
   * @returns 返回下一步的路由名称，方便组件跳转
   */
  function nextStep() {
    stopTimer()

    // A. 如果当前环节还有题
    if (!isLastQuestionInNode.value) {
      subStep.value++
      // 回到抽题页
      return 'user_draw'
    }
    // B. 当前环节结束，去下一个环节
    else if (!isLastNode.value) {
      currentStep.value++
      subStep.value = 0
      // 回到抽题页（新环节）
      return 'user_draw'
    }
    // C. 全部结束
    else {
      resetProgress()
      return 'user_cover'
    }
  }

  return {
    data,
    currentStep,
    subStep,
    timeLeft,
    currentNode,
    currentQuestion,
    initData,
    startTimer,
    stopTimer,
    nextStep,
  }
})