import { calculateOrderIncome } from "@/lib/domain/income"
import { generateId } from "@/lib/id"
import type { WalletTransaction } from "@/lib/types"
import { useShopStore } from "@/store/shops"
import { create } from "zustand"

interface WalletState {
  balance: number
  transactions: WalletTransaction[]
  topUp: (amount: number) => void
  withdraw: (amount: number) => void
  deductBalance: (orderId: string, amount: number) => boolean
  refundPayment: (orderId: string, amount: number) => boolean
  addIncome: (orderId: string, totalPrice: number, shopId?: string) => void
  addTransaction: (transaction: WalletTransaction) => void
}

export const useWalletStore = create<WalletState>((set, get) => ({
  balance: 0,
  transactions: [],
  topUp: (amount) => {
    if (!Number.isFinite(amount) || amount <= 0) return
    const now = new Date().toISOString()
    set((state) => ({
      balance: state.balance + amount,
      transactions: [
        {
          id: generateId("tx"),
          type: "topup",
          amount: String(amount),
          description: "充值",
          createdAt: now,
        },
        ...state.transactions,
      ],
    }))
  },
  withdraw: (amount) => {
    if (!Number.isFinite(amount) || amount <= 0) return
    const now = new Date().toISOString()
    set((state) => ({
      transactions: [
        {
          id: generateId("tx"),
          type: "withdrawal",
          amount: String(-amount),
          description: "提现到银行卡",
          createdAt: now,
        },
        ...state.transactions,
      ],
    }))
  },
  deductBalance: (orderId, amount) => {
    if (!Number.isFinite(amount) || amount <= 0) return false

    const state = get()
    const paid = state.transactions.some(
      (transaction) => transaction.type === "payment" && transaction.description.includes(orderId),
    )
    if (paid || state.balance < amount) {
      return false
    }

    const now = new Date().toISOString()
    set((prev) => ({
      balance: prev.balance - amount,
      transactions: [
        {
          id: generateId("tx"),
          type: "payment",
          amount: String(-amount),
          description: `支付订单 ${orderId}`,
          createdAt: now,
        },
        ...prev.transactions,
      ],
    }))
    return true
  },
  refundPayment: (orderId, amount) => {
    if (!Number.isFinite(amount) || amount <= 0) return false

    const state = get()
    const paid = state.transactions.some(
      (transaction) => transaction.type === "payment" && transaction.description.includes(orderId),
    )
    const refunded = state.transactions.some(
      (transaction) => transaction.type === "refund" && transaction.description.includes(orderId),
    )

    if (!paid || refunded) {
      return false
    }

    const now = new Date().toISOString()
    set((prev) => ({
      balance: prev.balance + amount,
      transactions: [
        {
          id: generateId("tx"),
          type: "refund",
          amount: String(amount),
          description: `订单 ${orderId} 退款`,
          createdAt: now,
        },
        ...prev.transactions,
      ],
    }))

    return true
  },
  addIncome: (orderId, totalPrice, shopId) => {
    if (!Number.isFinite(totalPrice) || totalPrice <= 0) return

    const state = get()
    const exists = state.transactions.some(
      (transaction) => transaction.type === "income" && transaction.description.includes(orderId),
    )
    if (exists) return

    const shop = shopId
      ? useShopStore.getState().shops.find((item) => item.id === shopId)
      : undefined
    const { income, commissionLabel } = calculateOrderIncome(totalPrice, shop)

    const now = new Date().toISOString()
    set((prev) => ({
      transactions: [
        {
          id: generateId("tx"),
          type: "income",
          amount: String(income),
          description: `订单 ${orderId} 收入（${commissionLabel}）`,
          createdAt: now,
        },
        ...prev.transactions,
      ],
    }))
  },
  addTransaction: (transaction) => {
    set((state) => ({
      transactions: [transaction, ...state.transactions],
    }))
  },
}))