import { create } from 'zustand'
import { persist } from 'zustand/middleware'
import { STORE_NAMES } from './storeNames'
import {
  setUserDefine,
  getUserDefineResult,
  type UserDefineFetchStatus,
} from '@/lib/utils/api-common'

interface ChenyunStore {
  // 存储每个场景（place）的已访问展品ID集合
  // 格式：{ place1: Set<1, 2>, place2: Set<1, 2>, ... }
  visitedExhibits: Record<string, Set<number>>

  // 标记展品为已访问
  markExhibitVisited: (place: string, exhibitId: number) => void

  // 检查展品是否已访问
  isExhibitVisited: (place: string, exhibitId: number) => boolean

  // 获取某个场景已访问的展品ID数组
  getVisitedExhibits: (place: string) => number[]

  // 重置某个场景的访问记录
  resetPlace: (place: string) => void

  // 重置所有访问记录
  resetAll: () => void

  // ========== 断点续读 ==========
  // 上次访问的场景（place1~place9）
  lastVisitedPlace: string | null
  setLastVisitedPlace: (place: string) => void

  // ========== 体悟模块状态 ==========
  // 银元之战是否已解决
  isYinyuanSolved: boolean
  // 设置银元之战解决状态
  setYinyuanSolved: (solved: boolean) => void

  // 米棉之战是否已解决
  isMimianSolved: boolean
  // 设置米棉之战解决状态
  setMimianSolved: (solved: boolean) => void

  // ========== 视频完成状态 ==========
  completedVideos: Record<string, boolean>
  markVideoCompleted: (videoKey: string) => void
}

// 将 Set 转换为数组以便序列化
const serializeVisitedExhibits = (
  visitedExhibits: Record<string, Set<number>>
): Record<string, number[]> => {
  const serialized: Record<string, number[]> = {}
  for (const [place, exhibits] of Object.entries(visitedExhibits)) {
    serialized[place] = Array.from(exhibits)
  }
  return serialized
}

// 将数组转换回 Set
const deserializeVisitedExhibits = (
  serialized: Record<string, number[]> | undefined
): Record<string, Set<number>> => {
  if (!serialized || typeof serialized !== 'object') {
    return {}
  }
  const visitedExhibits: Record<string, Set<number>> = {}
  for (const [place, exhibits] of Object.entries(serialized)) {
    if (Array.isArray(exhibits)) {
      visitedExhibits[place] = new Set(exhibits)
    } else {
      visitedExhibits[place] = new Set()
    }
  }
  return visitedExhibits
}

interface ChenyunPersistedState {
  visitedExhibits?: Record<string, number[]>
  isYinyuanSolved?: boolean
  isMimianSolved?: boolean
  lastVisitedPlace?: string | null
  completedVideos?: Record<string, boolean>
}

export const useChenyunStore = create<ChenyunStore>()(
  persist(
    (set, get) => ({
      visitedExhibits: {},

      markExhibitVisited: (place: string, exhibitId: number) => {
        set((state) => {
          const currentExhibits = state.visitedExhibits[place] || new Set<number>()
          if (!currentExhibits.has(exhibitId)) {
            const newExhibits = {
              ...state.visitedExhibits,
              [place]: new Set([...currentExhibits, exhibitId]),
            }
            return { visitedExhibits: newExhibits }
          }
          return state
        })
      },

      isExhibitVisited: (place: string, exhibitId: number) => {
        const { visitedExhibits } = get()
        return visitedExhibits[place]?.has(exhibitId) || false
      },

      getVisitedExhibits: (place: string) => {
        const { visitedExhibits } = get()
        return Array.from(visitedExhibits[place] || [])
      },

      resetPlace: (place: string) => {
        set((state) => {
          const newExhibits = { ...state.visitedExhibits }
          delete newExhibits[place]
          return { visitedExhibits: newExhibits }
        })
      },

      resetAll: () => {
        set({
          visitedExhibits: {},
          lastVisitedPlace: null,
          isYinyuanSolved: false,
          isMimianSolved: false,
          completedVideos: {},
        })
      },

      // ========== 断点续读 ==========
      lastVisitedPlace: null,
      setLastVisitedPlace: (place: string) => set({ lastVisitedPlace: place }),

      // ========== 体悟模块状态 ==========
      isYinyuanSolved: false,
      setYinyuanSolved: (solved: boolean) => {
        set({ isYinyuanSolved: solved })
      },

      isMimianSolved: false,
      setMimianSolved: (solved: boolean) => {
        set({ isMimianSolved: solved })
      },

      completedVideos: {},
      markVideoCompleted: (videoKey: string) => {
        set((state) => ({
          completedVideos: { ...state.completedVideos, [videoKey]: true },
        }))
      },
    }),
    {
      name: STORE_NAMES.CHENYUN, // localStorage key
      partialize: (state) => ({
        visitedExhibits: serializeVisitedExhibits(state.visitedExhibits),
        isYinyuanSolved: state.isYinyuanSolved,
        isMimianSolved: state.isMimianSolved,
        lastVisitedPlace: state.lastVisitedPlace,
        completedVideos: state.completedVideos,
      }),
      onRehydrateStorage: () => (state) => {
        if (state) {
          // 确保反序列化后的数据格式正确
          state.visitedExhibits = deserializeVisitedExhibits(state.visitedExhibits as any)
          // 确保解决状态有默认值
          if (state.isYinyuanSolved === undefined) {
            state.isYinyuanSolved = false
          }
          if (state.isMimianSolved === undefined) {
            state.isMimianSolved = false
          }
          if (state.lastVisitedPlace === undefined) {
            state.lastVisitedPlace = null
          }
          if (!state.completedVideos || typeof state.completedVideos !== 'object') {
            state.completedVideos = {}
          }
        }
      },
    }
  )
)

// ========== 易班平台数据保存 ==========
export const CHENYUN_LESSON_ID = 'Cheny_duihua'
export const CHENYUN_KEY = 22

export const saveChenyunStore = (): void => {
  const state = useChenyunStore.getState()

  const payload = {
    visitedExhibits: serializeVisitedExhibits(state.visitedExhibits),
    isYinyuanSolved: state.isYinyuanSolved,
    isMimianSolved: state.isMimianSolved,
    lastVisitedPlace: state.lastVisitedPlace,
    completedVideos: state.completedVideos,
  }

  try {
    setUserDefine(CHENYUN_LESSON_ID, CHENYUN_KEY, JSON.stringify(payload))
  } catch (error) {
    console.error('Failed to save Chenyun store', error)
  }
}

export const applyChenyunPersistedState = (payload: ChenyunPersistedState): void => {
  useChenyunStore.setState({
    visitedExhibits: deserializeVisitedExhibits(payload.visitedExhibits),
    isYinyuanSolved: payload.isYinyuanSolved ?? false,
    isMimianSolved: payload.isMimianSolved ?? false,
    lastVisitedPlace: payload.lastVisitedPlace ?? null,
    completedVideos: payload.completedVideos ?? {},
  })
}

export const loadChenyunStore = async (): Promise<UserDefineFetchStatus> => {
  try {
    const result = await getUserDefineResult(CHENYUN_LESSON_ID, CHENYUN_KEY)
    if (result.status !== 'success') {
      if (result.status === 'empty') {
        useChenyunStore.getState().resetAll()
      }
      return result.status
    }

    applyChenyunPersistedState(JSON.parse(result.content) as ChenyunPersistedState)
    return result.status
  } catch (error) {
    console.error('Failed to load Chenyun store', error)
    return 'error'
  }
}