import { useCallback, useMemo, useState } from 'react'
import { useTranslation } from 'react-i18next'
import { placeGameBet } from '@/api'
import { CHIP_IMAGE_MAP, CHIP_IMAGE_OPTIONS } from '@/constants'
import { notify } from '@/lib/notify'
import { useAuthStore, useModalStore } from '@/store'
import {
  selectSelectionTotal,
  useGameAutoHostingStore,
  useGameRoundStore,
  useGameSessionStore,
} from '@/store/game'
import type { ConfirmState } from '@/type'

function formatChipDisplayValue(amount: number) {
  if (Number.isInteger(amount)) {
    return String(amount)
  }

  return amount.toFixed(2).replace(/\.?0+$/, '')
}

function parseBalance(value: string | number | null | undefined) {
  if (typeof value === 'number') {
    return Number.isFinite(value) ? value : 0
  }

  if (typeof value !== 'string') {
    return 0
  }

  const parsed = Number(value)

  return Number.isFinite(parsed) ? parsed : 0
}

function createIdempotencyKey() {
  if (
    typeof crypto !== 'undefined' &&
    typeof crypto.randomUUID === 'function'
  ) {
    return `bet-${crypto.randomUUID()}`
  }

  return `bet-${Date.now()}-${Math.random().toString(36).slice(2, 10)}`
}

function toBetId(chipId: string) {
  const match = chipId.match(/^chip-(\d+)$/)

  if (!match) {
    return null
  }

  const betId = Number(match[1])

  return Number.isInteger(betId) && betId >= 1 && betId <= 6 ? betId : null
}

export function useGameControlVm() {
  const { t } = useTranslation()
  const chips = useGameRoundStore((state) => state.chips)
  const activeChipId = useGameRoundStore((state) => state.activeChipId)
  const activeBetQuantity = useGameRoundStore(
    (state) => state.activeBetQuantity,
  )
  const round = useGameRoundStore((state) => state.round)
  const maxSelectionCount = useGameRoundStore(
    (state) => state.maxSelectionCount,
  )
  const adjustBetQuantity = useGameRoundStore(
    (state) => state.adjustBetQuantity,
  )
  const selections = useGameRoundStore((state) => state.selections)
  const clearSelections = useGameRoundStore((state) => state.clearSelections)
  const restoreRecentSuccessfulSelections = useGameRoundStore(
    (state) => state.restoreRecentSuccessfulSelections,
  )
  const setRecentSuccessfulSelections = useGameRoundStore(
    (state) => state.setRecentSuccessfulSelections,
  )
  const isAutoHosting = useGameAutoHostingStore((state) => state.isHosting)
  const selectChip = useGameRoundStore((state) => state.selectChip)
  const totalBetAmount = useGameRoundStore(selectSelectionTotal)
  const connectionStatus = useGameSessionStore(
    (state) => state.connection.status,
  )
  const tableLimitMax = useGameSessionStore(
    (state) => state.dashboard.tableLimitMax,
  )
  const shouldConnectRealtime = useGameSessionStore(
    (state) => state.shouldConnectRealtime,
  )
  const authStatus = useAuthStore((state) => state.status)
  const currentUser = useAuthStore((state) => state.currentUser)
  const setCurrentUser = useAuthStore((state) => state.setCurrentUser)
  const setModalOpen = useModalStore((state) => state.setModalOpen)
  const [isSubmitting, setIsSubmitting] = useState(false)

  const chipItems = useMemo(() => {
    const items = chips.map((chip) => ({
      amount: chip.amount,
      id: chip.id,
      isSelected: chip.id === activeChipId,
      isDisabled: tableLimitMax > 0 && chip.amount > tableLimitMax,
      src: CHIP_IMAGE_MAP.get(chip.id) ?? CHIP_IMAGE_OPTIONS[0]?.src ?? '',
      valueLabel: formatChipDisplayValue(chip.amount),
    }))

    return items.sort((left, right) => {
      if (left.isSelected === right.isSelected) {
        return left.id.localeCompare(right.id, undefined, { numeric: true })
      }

      return left.isSelected ? 1 : -1
    })
  }, [activeChipId, chips, tableLimitMax])

  const selectedChip =
    chipItems.find((chip) => chip.id === activeChipId) ?? chipItems[0] ?? null
  const balance = parseBalance(currentUser?.coin)
  const hasSelections = selections.length > 0
  const hasEnteredGame =
    shouldConnectRealtime && connectionStatus === 'connected'
  const hasSubmittedCurrentRound =
    Boolean(round.id) && currentUser?.lastBetPeriodNo === round.id
  const hasInsufficientBalance = hasSelections && totalBetAmount > balance
  const hasExceededBetLimit =
    hasSelections && tableLimitMax > 0 && totalBetAmount > tableLimitMax
  const canIncreaseBetQuantity = useMemo(() => {
    if (!hasSelections) {
      return true
    }

    const activeChip = chips.find((chip) => chip.id === activeChipId)

    if (!activeChip) {
      return false
    }

    const nextQuantity = activeBetQuantity + 1
    const nextTotalPerSelection = activeChip.amount * nextQuantity
    const nextTotal = nextTotalPerSelection * selections.length

    return tableLimitMax <= 0 || nextTotal <= tableLimitMax
  }, [
    hasSelections,
    chips,
    activeChipId,
    activeBetQuantity,
    selections.length,
    tableLimitMax,
  ])
  const confirmState: ConfirmState =
    isSubmitting || isAutoHosting
      ? 'submitting'
      : !hasSelections
        ? 'idle'
        : hasExceededBetLimit
          ? 'limit'
          : hasInsufficientBalance
            ? 'insufficient'
            : 'ready'

  const handleConfirm = useCallback(async () => {
    if (confirmState === 'submitting' || !hasSelections) {
      return
    }

    if (authStatus !== 'authenticated') {
      notify.warning(t('commonUi.toast.loginRequired'))
      setModalOpen('desktopLogin', true)
      return
    }

    if (hasExceededBetLimit) {
      notify.warning(t('commonUi.toast.betLimitExceeded'))
      return
    }

    if (hasInsufficientBalance) {
      notify.warning(t('commonUi.toast.insufficientBalance'))
      return
    }

    if (round.phase !== 'betting' || !round.id) {
      notify.warning(t('commonUi.toast.betUnavailable'))
      return
    }

    if (hasSubmittedCurrentRound) {
      notify.warning(t('commonUi.toast.betUnavailable'))
      return
    }

    const latestBalance = parseBalance(
      useAuthStore.getState().currentUser?.coin,
    )

    if (totalBetAmount > latestBalance) {
      notify.warning(t('commonUi.toast.insufficientBalance'))
      return
    }

    const betId = toBetId(selections[0]?.chipId ?? activeChipId)
    const singleBetAmount = selections[0]?.amount ?? selectedChip?.amount ?? 0

    if (betId === null || singleBetAmount <= 0) {
      notify.warning(t('commonUi.toast.betUnavailable'))
      return
    }

    setIsSubmitting(true)

    try {
      let latestBalance = currentUser?.coin ?? '0'

      const uniqueNumbers = [
        ...new Set(selections.map((item) => item.cellId)),
      ].sort((left, right) => left - right)
      const formattedSingleBetAmount = formatChipDisplayValue(singleBetAmount)
      const result = await placeGameBet({
        bet_amount: formattedSingleBetAmount,
        bet_id: betId,
        idempotency_key: createIdempotencyKey(),
        numbers: uniqueNumbers.join(','),
        period_no: round.id,
        single_bet_amount: formattedSingleBetAmount,
      })

      if (result.status !== 'accepted') {
        throw new Error(t('commonUi.toast.betRejected'))
      }

      latestBalance = result.balance_after

      if (currentUser) {
        setCurrentUser({
          ...currentUser,
          coin: latestBalance,
          lastBetPeriodNo: round.id,
        })
      }

      setRecentSuccessfulSelections(selections)
      clearSelections()
      notify.success(t('commonUi.toast.betPlaced'))
    } catch (error) {
      notify.error(t('commonUi.toast.betPlaceFailed'), {
        description: error instanceof Error ? error.message : undefined,
      })
    } finally {
      setIsSubmitting(false)
    }
  }, [
    activeChipId,
    authStatus,
    clearSelections,
    confirmState,
    currentUser,
    hasInsufficientBalance,
    hasExceededBetLimit,
    hasSelections,
    hasSubmittedCurrentRound,
    round.id,
    round.phase,
    selections,
    selectedChip?.amount,
    setRecentSuccessfulSelections,
    setCurrentUser,
    setModalOpen,
    t,
    totalBetAmount,
  ])

  const handleRepeatSelections = useCallback(() => {
    if (round.phase !== 'betting' || hasSubmittedCurrentRound) {
      notify.warning(t('commonUi.toast.betUnavailable'))
      return
    }

    const restored = restoreRecentSuccessfulSelections()

    if (!restored) {
      notify.warning(t('commonUi.toast.noRecentSuccessfulBet'))
      return
    }

    notify.success(t('commonUi.toast.repeatSelectionsRestored'))
  }, [
    hasSubmittedCurrentRound,
    restoreRecentSuccessfulSelections,
    round.phase,
    t,
  ])

  const handleOpenAutoSetting = useCallback(() => {
    if (!hasSelections) {
      notify.warning(t('commonUi.toast.selectNumbersBeforeAutoHosting'))
      return
    }

    setModalOpen('desktopAutoSetting', true)
  }, [hasSelections, setModalOpen, t])

  return {
    acceptingBets:
      round.phase === 'betting' && !hasSubmittedCurrentRound && !isAutoHosting,
    actionsEnabled:
      hasEnteredGame &&
      round.phase === 'betting' &&
      !hasSubmittedCurrentRound &&
      !isAutoHosting,
    canClear:
      selections.length > 0 &&
      round.phase === 'betting' &&
      !hasSubmittedCurrentRound &&
      !isAutoHosting,
    canDecreaseBetQuantity: activeBetQuantity > 1,
    canIncreaseBetQuantity,
    confirmLabel:
      confirmState === 'idle'
        ? t('gameDesktop.control.selectNumbers')
        : confirmState === 'insufficient'
          ? t('gameDesktop.control.insufficientBalance')
          : confirmState === 'limit'
            ? t('gameDesktop.control.betLimitExceeded')
            : confirmState === 'submitting'
              ? t('gameDesktop.control.submitting')
              : t('gameDesktop.control.confirm'),
    confirmState,
    isConfirmClickable: confirmState === 'ready' && !isAutoHosting,
    onChipSelect: selectChip,
    onDecreaseBetQuantity: () => adjustBetQuantity(-1),
    onIncreaseBetQuantity: () => {
      if (!canIncreaseBetQuantity) {
        notify.warning(t('commonUi.toast.betLimitExceeded'))
        return
      }

      adjustBetQuantity(1)
    },
    onConfirm: handleConfirm,
    onClearSelections: clearSelections,
    onOpenAutoSetting: handleOpenAutoSetting,
    onRepeatSelections: handleRepeatSelections,
    maxSelectionCountLabel: maxSelectionCount,
    selectedBetQuantityLabel: activeBetQuantity,
    selectedChipId: activeChipId,
    selectedCountLabel: selections.length,
    totalBetAmountLabel: formatChipDisplayValue(totalBetAmount),
    chips: chipItems,
  }
}