import { computed, toRefs, shallowReadonly } from 'vue'
import { v4 } from 'uuid'
import { formatDecimal } from '@/filters'
import { BuyOrSell } from '@/constants/buyorsell'
import { queryTaAccounts } from '@/services/api/account'
import { queryErmcpTradePosition } from '@/services/api/trade'
import subscribe from '@/services/subscribe'
import { useLoginStore } from './login'
import { useFuturesStore } from './futures'
import { VueStore } from '../base'
import eventBus from '@/services/bus'

interface StoreState {
    loading: boolean;
    accountId: number; // 当前资金账户ID
    accountList: Ermcp.TaAccountsRsp[]; // 资金账户列表
    accountPositionList: Ermcp.TradePositionRsp[]; // 资金账户持仓列表
}

function useFormula(item: Ermcp.TradePositionRsp) {
    const { getGoodsPriceByCode } = useFuturesStore()
    const { goodscode, buyorsell, curpositionqty, agreeunit, positionpl, opencost, positioncost, decimalplace } = item

    // 计算开仓均价
    const calcOpenAveragePrice = () => {
        // 开仓成本 ÷ 期末头寸 ÷ 合约单位
        return opencost / curpositionqty / agreeunit
    }

    // 计算持仓均价
    const calcPositionAveragePrice = () => {
        // 持仓成本 ÷ 期末头寸 ÷ 合约单位
        return positioncost / curpositionqty / agreeunit
    }

    // 计算浮动盈亏 - 对应市场收益权
    const calcProfitLoss = () => {
        const last = getGoodsPriceByCode(goodscode)
        let result = positionpl

        if (last.value) {
            const positionAveragePrice = calcPositionAveragePrice()
            // 收益权 = (最新价 - 持仓均价) * 持仓数量 * 合约单位 * 方向(买1卖-1)
            const rightToEarnings = (last.value - positionAveragePrice) * curpositionqty * agreeunit
            result = rightToEarnings * (buyorsell === BuyOrSell.Buy ? 1 : -1)
        }
        return formatDecimal(result, decimalplace)
    }

    return {
        calcOpenAveragePrice,
        calcPositionAveragePrice,
        calcProfitLoss
    }
}

/**
 * 账户存储类
 */
const store = new (class extends VueStore<StoreState>{
    constructor() {
        const state: StoreState = {
            loading: false,
            accountId: 0,
            accountList: [],
            accountPositionList: [],
        }
        super(state)

        // 接收资金变动通知
        eventBus.$on('MoneyChangedNotify', () => {
            this.actions.getAccountList()
        })
    }

    private uuid = v4()
    private pending = Promise.resolve() // 请求等待状态，防止重复请求

    /** 当前资金账户信息 */
    private accountInfo = computed(() => {
        const account = this.state.accountList.find((e) => e.accountid === this.state.accountId)
        // 总浮动盈亏
        const totalProfitLoss = this.futuresPositionList.value.reduce((res, cur) => res + cur.positionpl, 0)
        return {
            ...account,
            totalProfitLoss,
        }
    })

    /** 期货持仓列表 */
    private futuresPositionList = computed(() => {
        const positionList = this.state.accountPositionList
        return positionList.reduce((res, item) => {
            const { calcProfitLoss } = useFormula(item)
            res.push({
                ...item,
                positionpl: Number(calcProfitLoss()),
            })
            return res
        }, [] as Ermcp.TradePositionRsp[])
    })

    getters = {
        accountInfo: this.accountInfo,
        futuresPositionList: this.futuresPositionList
    }

    actions = {
        /** 获取资金账户列表 */
        getAccountList: async () => {
            await this.pending
            const { getLoginId } = useLoginStore()
            this.state.loading = true

            this.pending = queryTaAccounts({
                data: {
                    loginID: getLoginId()
                },
                success: (res) => {
                    const dataList = res.data
                    if (dataList.length) {
                        this.state.accountList = dataList
                        // 查找当前选中的资金账户
                        const account = dataList.find((e) => e.accountid === this.state.accountId)
                        if (account) {
                            this.state.loading = false
                        } else {
                            // 如果不存在，默认选中第一个账户
                            this.state.accountId = dataList[0].accountid
                            this.actions.getAccountPositionList()
                        }
                    } else {
                        this.state.loading = false
                        this.actions.reset()
                    }
                },
                fail: () => {
                    this.state.loading = false
                }
            })
            return this.pending
        },
        /** 获取资金账户持仓列表 */
        getAccountPositionList: async (marketID?: number) => {
            await this.pending
            subscribe.removeQuoteSubscribe(this.uuid)
            this.state.loading = true

            this.pending = queryErmcpTradePosition({
                data: {
                    accountID: this.state.accountId,
                    ...marketID ? { marketID } : {}
                },
                success: (res) => {
                    const codes = res.data.map((e) => e.goodscode)
                    this.state.accountPositionList = res.data
                    if (codes.length) {
                        // 行情订阅
                        subscribe.addQuoteSubscribe(codes, this.uuid).start()
                    }
                },
                complete: () => {
                    this.state.loading = false
                }
            })
            return this.pending
        },
        /** 重置数据 */
        reset: () => {
            this.state.accountId = 0
            this.state.accountList = []
            this.state.accountPositionList = []
        }
    }
})

export function useAccountStore() {
    return shallowReadonly({
        ...toRefs(store.state),
        ...store.getters,
        ...store.actions,
        ...store.methods,
    })
}