package logic

import (
	"math"
	"sync"

	"big-qmt/go-client/config"
	"big-qmt/go-client/libs"
	"big-qmt/go-client/sdk"
)

const (
	legBase  = "base"
	legAdded = "add"
)

var (
	peakMu    sync.Mutex
	peakGrids = make(map[string]int)
)

func managePositions(client *sdk.Client, ticks map[string]sdk.Tick, positions []sdk.Position, marketOK bool) {
	for _, pos := range positions {
		item, err := QuantState.Get(code)
		if err != nil || item.BaseStatus == StatusIng || item.AddedStatus == StatusIng || position.Volume != item.BaseQty+item.AddedQty {
			continue
		}
		price := ticks[code].LastPrice
		if price <= 0 {
			continue
		}
		if item.AddedQty > 0 {
			pnl := (price - item.AddedCost) / item.AddedCost * 100
			if shouldSell(code, legAdded, pnl) {
				sell(client, item, position.CanUseVolume, item.AddedQty, legAdded, pnl)
			}
			continue
		}

		pnl := (price - item.BaseCost) / item.BaseCost * 100
		if shouldSell(code, legBase, pnl) {
			sell(client, item, position.CanUseVolume, item.BaseQty, legBase, pnl)
		} else if pnl <= config.Account.LossTriggerPct {
			buyAdded(client, item, price, marketOK, budget)
		}
	}
}

func syncAdded(item *StateItem, position sdk.Position) {
	addedQty := position.Volume - item.BaseQty
	if addedQty <= 0 {
		item.BaseQty = position.Volume
		item.BaseCost = position.OpenPrice
		item.AddedQty = 0
		item.AddedCost = 0
		item.AddedStatus = StatusNone
		peakMu.Lock()
		delete(peakGrids, item.Code+"|"+legAdded)
		peakMu.Unlock()
		return
	}

	item.AddedQty = addedQty
	totalCost := position.OpenPrice * float64(position.Volume)
	baseCost := item.BaseCost * float64(item.BaseQty)
	item.AddedCost = math.Max(0, (totalCost-baseCost)/float64(addedQty))
	item.AddedStatus = StatusOk
}

func buyAdded(client *sdk.Client, item *StateItem, price float64, marketOK bool, budget *float64) {
	if !marketOK || !PosbuyWatch.Triggered("补仓", item.Code, price) {
		return
	}
	volume := libs.CalcBuyVolume(price, config.Account.BuyValue)
	amount := price * float64(volume)
	if amount > *budget || orderBusy(item.Code, "BUY") {
		return
	}

	orderID := NewOrderID(legAdded)
	if !OrderBook.Place(client, sdk.OpBuy, item.Code, volume, orderID) {
		return
	}
	item.AddedOrderId = orderID
	item.AddedNum++
	item.AddedQty = volume
	item.AddedCost = price
	item.AddedStatus = StatusIng
	QuantState.Set(item)
	*budget -= amount
}

func sell(client *sdk.Client, item *StateItem, usable, volume int, leg string, pnl float64) {
	volume -= volume % 100
	if volume <= 0 || usable < volume || orderBusy(item.Code, "SELL") {
		return
	}
	orderID := NewOrderID(leg)
	if !OrderBook.Place(client, sdk.OpSell, item.Code, volume, orderID) {
		return
	}
	if leg == legAdded {
		item.AddedOrderId = orderID
		item.AddedStatus = StatusIng
	} else {
		item.BaseOrderId = orderID
		item.BaseStatus = StatusIng
	}
	QuantState.Set(item)
	logf("INFO", "[止盈] %s 卖出%d股，盈利=%.2f%%", item.Code, volume, pnl)
}

func orderBusy(code, side string) bool {
	OrderBook.mu.Lock()
	defer OrderBook.mu.Unlock()
	order := OrderBook.Data[side+"-"+code]
	if order == nil {
		return false
	}
	switch order.Status {
	case "48", "49", "50", "51", "52", "55":
		return true
	default:
		return false
	}
}

func shouldSell(code, leg string, pnl float64) bool {
	if pnl < config.Account.MinProfitPct {
		return false
	}
	grid := int(math.Floor(pnl / config.Account.GridStepPct))
	key := code + "|" + leg
	peakMu.Lock()
	defer peakMu.Unlock()
	peak, tracked := peakGrids[key]
	if !tracked || grid > peak {
		peakGrids[key] = grid
		return false
	}
	return grid < peak
}

func forget(code string) {
	OpenWatch.mu.Lock()
	delete(OpenWatch.Data, code)
	OpenWatch.mu.Unlock()
	PosbuyWatch.mu.Lock()
	delete(PosbuyWatch.Data, code)
	PosbuyWatch.mu.Unlock()
	peakMu.Lock()
	delete(peakGrids, code+"|"+legBase)
	delete(peakGrids, code+"|"+legAdded)
	peakMu.Unlock()
}