import { computed } from 'vue'

export interface QuestionItem {
  value: string | null
  score: number
  time: number
}

export interface RoundModel {
  id: string
  name: string
  questions: QuestionItem[]
}

export interface QuestionConfigModel {
  rounds: RoundModel[]
}

export function useQuestionConfig(props: any) {
  // 计算每个轮次的分数
  const getRoundScore = (roundIndex: number) => {
    const round = props.modelValue?.rounds?.[roundIndex]
    if (!round)
      return 0
    return round.questions.reduce((sum: number, item: any) => sum + (Number(item.score) || 0), 0)
  }

  // 计算每个轮次的时长
  const getRoundTime = (roundIndex: number) => {
    const round = props.modelValue?.rounds?.[roundIndex]
    if (!round)
      return 0
    return round.questions.reduce((sum: number, item: any) => sum + (Number(item.time) || 0), 0)
  }

  // 总计统计
  const totalStats = computed(() => {
    const rounds = props.modelValue?.rounds || []
    return rounds.reduce((acc: any, round: any) => {
      acc.count += round.questions.length
      acc.score += round.questions.reduce((sum: number, item: any) => sum + (Number(item.score) || 0), 0)
      acc.time += round.questions.reduce((sum: number, item: any) => sum + (Number(item.time) || 0), 0)
      return acc
    }, { count: 0, score: 0, time: 0 })
  })

  const questionOptions = [
    { label: '汉字听写 - 根据提示书写汉字', value: 'hanzi' },
    { label: '同音字辨析 - 根据拼音书写', value: 'tongyin' },
    { label: '偏旁部首 - 按要求写字', value: 'pianpang' },
    { label: '词语听写 - 综合练习', value: 'ciyu' },
    { label: '成语填空 - 四字成语', value: 'chengyu' },
    { label: '反义词挑战', value: 'fanyi' },
    { label: '近义词挑战', value: 'jinyi' },
    { label: '看图猜字', value: 'kantu' },
    { label: '古诗词接龙', value: 'gushi' },
    { label: '名句听写', value: 'mingju' },
    { label: '极速成语接龙 - 每题10秒', value: 'speed10' },
    { label: '极速成语接龙 - 每题20秒', value: 'speed20' },
  ]

  const scoreOptions = [
    { label: '1分', value: 1 },
    { label: '2分', value: 2 },
    { label: '3分', value: 3 },
    { label: '5分', value: 5 },
    { label: '10分', value: 10 },
  ]

  const timeOptions = [
    { label: '15s', value: 15 },
    { label: '30s', value: 30 },
    { label: '45s', value: 45 },
    { label: '60s', value: 60 },
    { label: '90s', value: 90 },
  ]

  // 新增轮次
  function addRound(customName?: string, customCount?: number) {
    if (!props.modelValue.rounds) {
      props.modelValue.rounds = []
    }
    const index = props.modelValue.rounds.length + 1
    const count = typeof customCount === 'number' ? customCount : 10
    const name = typeof customName === 'string' ? customName : `第${index}轮：比赛环节`

    props.modelValue.rounds.push({
      id: `round_${Date.now()}`,
      name,
      questions: Array.from({ length: count }).map(() => ({
        value: null,
        score: 5,
        time: 30,
      })),
    })
  }

  // 删除轮次
  function removeRound(index: number) {
    props.modelValue.rounds.splice(index, 1)
    // 重命名剩余轮次
    props.modelValue.rounds.forEach((round: RoundModel, idx: number) => {
      round.name = round.name.replace(/第\d+轮/, `第${idx + 1}轮`)
    })
  }

  // 新增题目
  function addQuestion(roundIndex: number) {
    const round = props.modelValue.rounds[roundIndex]
    if (round) {
      round.questions.push({
        value: null,
        score: 5,
        time: 30,
      })
    }
  }

  // 删除题目
  function removeQuestion(roundIndex: number, questionIndex: number) {
    const round = props.modelValue.rounds[roundIndex]
    if (round) {
      round.questions.splice(questionIndex, 1)
    }
  }

  function validate() {
    const rounds = props.modelValue?.rounds || []
    if (rounds.length === 0) {
      window.$message?.error('请至少配置一个比赛环节')
      return false
    }

    for (let i = 0; i < rounds.length; i++) {
      const round = rounds[i]
      if (round.questions.length === 0) {
        window.$message?.error(`${round.name} 至少需要配置一道题目`)
        return false
      }
      for (let j = 0; j < round.questions.length; j++) {
        if (!round.questions[j].value) {
          window.$message?.error(`${round.name} 第 ${j + 1} 题未选择题型`)
          return false
        }
      }
    }
    return true
  }

  function reset() {
    // 默认重置为1个轮次，10个题目
    props.modelValue.rounds = []
    addRound()
  }

  return {
    getRoundScore,
    getRoundTime,
    totalStats,
    questionOptions,
    scoreOptions,
    timeOptions,
    addRound,
    removeRound,
    addQuestion,
    removeQuestion,
    validate,
    reset,
  }
}
