import { defineStore } from 'pinia'

import { uniStorage } from '@/utils/uniStorage'

export interface SettlementSignContext {
  signTraceId: string
  subjectLocation: string
  createdAt: number
}

interface SettlementSignState {
  context?: SettlementSignContext
  returnedSignTraceId: string
  processingSignTraceId: string
}

const SIGN_CONTEXT_EXPIRE_TIME = 30 * 60 * 1000

const createSignTraceId = (subjectLocation: string): string => {
  return `${Date.now()}_${subjectLocation}`
}

export const useSettlementSignStore = defineStore('settlementSign', {
  state: (): SettlementSignState => ({
    context: undefined,
    returnedSignTraceId: '',
    processingSignTraceId: '',
  }),

  getters: {
    validContext(state): SettlementSignContext | undefined {
      if (!state.context?.subjectLocation) return undefined

      const isExpired = Date.now() - state.context.createdAt > SIGN_CONTEXT_EXPIRE_TIME

      if (isExpired) return undefined

      return state.context
    },

    pendingSubjectLocation(): string {
      return this.validContext?.subjectLocation || ''
    },

    returnedContext(): SettlementSignContext | undefined {
      const context = this.validContext
      return context?.signTraceId === this.returnedSignTraceId ? context : undefined
    },
  },

  actions: {
    createContext(subjectLocation: string): SettlementSignContext {
      const context: SettlementSignContext = {
        signTraceId: createSignTraceId(subjectLocation),
        subjectLocation,
        createdAt: Date.now(),
      }

      this.context = context
      this.returnedSignTraceId = ''

      return context
    },

    markReturned(subjectLocation: string, signTraceId: string): void {
      const context = this.validContext
      if (
        !context ||
        context.subjectLocation !== subjectLocation ||
        context.signTraceId !== signTraceId ||
        this.processingSignTraceId === signTraceId
      ) {
        return
      }

      this.returnedSignTraceId = signTraceId
    },

    // query 回跳与 WebView 返回共用同一把锁，避免两个页面实例重复处理。
    beginSignRedirect(subjectLocation: string, signTraceId: string): boolean {
      if (this.processingSignTraceId) return false

      const context = this.validContext
      if (
        signTraceId &&
        (context?.signTraceId !== signTraceId || context.subjectLocation !== subjectLocation)
      ) {
        return false
      }

      this.processingSignTraceId =
        signTraceId ||
        (context?.subjectLocation === subjectLocation ? context.signTraceId : subjectLocation)
      this.returnedSignTraceId = ''
      return true
    },

    finishSignRedirect(): void {
      this.processingSignTraceId = ''
    },

    clearContext(signTraceId?: string): void {
      if (signTraceId && this.context?.signTraceId !== signTraceId) return

      this.context = undefined
      this.returnedSignTraceId = ''
    },
  },

  persist: {
    key: 'settlement-sign-store',
    storage: uniStorage,
    pick: ['context'],
  },
})