package service

import (
	"context"
	"errors"
	"fmt"
	"time"

	"gitea.com/red-future/common/consul"
	"gitea.com/red-future/common/http"
	"github.com/gogf/gf/v2/util/gconv"

	marketConsts "shop-user-trade/consts/market"
	marketDao "shop-user-trade/dao/market"
	marketDto "shop-user-trade/model/dto/market"
	marketEntity "shop-user-trade/model/entity/market"
)

type market struct{}

// Market 市场服务
var Market = new(market)

// Create 创建市场物品
func (s *market) Create(ctx context.Context, req *marketDto.CreateMarketReq) (int64, error) {
	// 检查该背包项是否已经在市场中
	existing, _ := marketDao.Market.GetByKnapsackID(ctx, req.KnapsackID)
	if existing != nil && existing.Id > 0 {
		return 0, errors.New("该物品已在市场中")
	}

	// 设置上架过期时间（默认7天）
	if req.ListExpireAt == nil {
		defaultExpire := time.Now().Add(7 * 24 * time.Hour).Unix()
		req.ListExpireAt = &defaultExpire
	}

	id, err := marketDao.Market.Insert(ctx, req)
	if err != nil {
		return 0, fmt.Errorf("创建市场物品失败: %w", err)
	}
	return id, nil
}

// GetOne 获取单个市场物品
func (s *market) GetOne(ctx context.Context, req *marketDto.GetMarketReq) (*marketDto.GetMarketRes, error) {
	item, err := marketDao.Market.GetOne(ctx, req)
	if err != nil {
		return nil, err
	}
	if item == nil {
		return nil, errors.New("市场物品不存在")
	}
	return &marketDto.GetMarketRes{
		MarketItem: s.entityToItem(item),
	}, nil
}

// List 获取市场列表（支持分页和搜索）
func (s *market) List(ctx context.Context, req *marketDto.ListMarketReq) (*marketDto.ListMarketRes, error) {
	list, total, err := marketDao.Market.List(ctx, req)
	if err != nil {
		return nil, err
	}
	res := &marketDto.ListMarketRes{Total: total}
	for _, item := range list {
		itemCopy := item
		res.List = append(res.List, s.entityToItem(&itemCopy))
	}
	return res, nil
}

// Unlist 下架市场物品
func (s *market) Unlist(ctx context.Context, req *marketDto.UnlistMarketReq) error {
	item, err := marketDao.Market.GetByID(ctx, req.ID)
	if err != nil {
		return err
	}
	if item == nil {
		return errors.New("市场物品不存在")
	}
	if item.Status != marketConsts.MarketStatusActive {
		return errors.New("只有活跃状态的物品才能下架")
	}
	inactiveStatus := marketConsts.MarketStatusInactive
	updateReq := &marketDto.UpdateMarketReq{
		Id:      item.Id,
		Status:  &inactiveStatus,
		Updater: req.OperatorName,
	}
	if _, err = marketDao.Market.Update(ctx, updateReq); err != nil {
		return fmt.Errorf("更新市场物品失败: %w", err)
	}
	return nil
}

// UpdatePrice 更新价格
func (s *market) UpdatePrice(ctx context.Context, req *marketDto.UpdatePriceReq) error {
	item, err := marketDao.Market.GetByID(ctx, req.ID)
	if err != nil {
		return err
	}
	if item == nil {
		return errors.New("市场物品不存在")
	}
	if item.Status != marketConsts.MarketStatusActive {
		return errors.New("只有活跃状态的物品才能更新价格")
	}
	updateReq := &marketDto.UpdateMarketReq{
		Id:      item.Id,
		Price:   &req.Price,
		Updater: req.OperatorName,
	}
	if _, err = marketDao.Market.Update(ctx, updateReq); err != nil {
		return fmt.Errorf("更新价格失败: %w", err)
	}
	return nil
}

// Buy 购买市场物品 - 调用order模块创建订单
func (s *market) Buy(ctx context.Context, req *marketDto.BuyMarketReq) (string, error) {
	item, err := marketDao.Market.GetByID(ctx, req.MarketID)
	if err != nil {
		return "", err
	}
	if item == nil {
		return "", errors.New("市场物品不存在")
	}
	if err = s.canBeBought(item); err != nil {
		return "", err
	}
	// 检查买家不能是卖家
	if item.UserID == req.BuyerID {
		return "", errors.New("不能购买自己上架的物品")
	}

	// 调用order模块创建订单
	orderAddr, err := consul.GetInstanceAddr(ctx, "order")
	if err != nil {
		return "", fmt.Errorf("获取order服务地址失败: %w", err)
	}

	orderReq := map[string]interface{}{
		"user_id":     req.BuyerID,
		"order_type":  "market",
		"subject":     item.AssetName,
		"description": item.Description,
		"order_items": []map[string]interface{}{
			{
				"asset_id":   item.AssetID,
				"asset_name": item.AssetName,
				"asset_type": item.Type,
				"image_url":  item.ImageURL,
				"stocks": []map[string]interface{}{
					{
						"stock_id":   item.StockDetailID,
						"batch_id":   item.BatchID,
						"batch_no":   item.BatchNo,
						"quantity":   1,
						"price":      item.Price,
						"stock_mode": item.StockMode,
						"stock_attrs": map[string]interface{}{
							"market_id": item.Id,
							"seller_id": item.UserID,
						},
					},
				},
			},
		},
		"shipping_info": map[string]interface{}{},
	}

	orderRes := &struct {
		Code    int    `json:"code"`
		Message string `json:"message"`
		Data    struct {
			OrderNo     string `json:"order_no"`
			TotalAmount int64  `json:"total_amount"`
			PayAmount   int64  `json:"pay_amount"`
			ExpiredAt   string `json:"expired_at"`
		} `json:"data"`
	}{}
	err = http.Post(ctx, fmt.Sprintf("http://%s/order/create", orderAddr), nil, orderRes, orderReq) // #nosec G107
	if err != nil {
		return "", fmt.Errorf("创建订单失败: %w", err)
	}

	// 更新市场物品状态为已售出
	soldStatus := marketConsts.MarketStatusSold
	updateReq := &marketDto.UpdateMarketReq{
		Id:     item.Id,
		Status: &soldStatus,
	}
	if _, err = marketDao.Market.Update(ctx, updateReq); err != nil {
		return "", fmt.Errorf("更新市场物品失败: %w", err)
	}
	return orderRes.Data.OrderNo, nil
}

// ExpireExpiredItems 将过期的市场物品标记为过期状态（定时任务调用）
func (s *market) ExpireExpiredItems(ctx context.Context) (int64, error) {
	expiredList, err := marketDao.Market.ListExpired(ctx)
	if err != nil {
		return 0, fmt.Errorf("查询过期物品失败: %w", err)
	}
	if len(expiredList) == 0 {
		return 0, nil
	}
	count := int64(len(expiredList))
	expiredStatus := marketConsts.MarketStatusExpired
	for _, item := range expiredList {
		updateReq := &marketDto.UpdateMarketReq{
			Id:     item.Id,
			Status: &expiredStatus,
		}
		if _, err = marketDao.Market.Update(ctx, updateReq); err != nil {
			return count, fmt.Errorf("更新过期物品状态失败: %w", err)
		}
	}
	return count, nil
}

// canBeBought 检查市场物品是否可以购买
func (s *market) canBeBought(item *marketEntity.Market) error {
	if item.Status != marketConsts.MarketStatusActive {
		return errors.New("物品状态不可购买")
	}
	if item.ListExpireAt != nil && *item.ListExpireAt < time.Now().Unix() {
		return errors.New("物品已过期")
	}
	return nil
}

// entityToItem 实体转换为Item
func (s *market) entityToItem(e *marketEntity.Market) *marketDto.MarketItem {
	item := &marketDto.MarketItem{}
	if err := gconv.Struct(e, item); err != nil {
		return item
	}
	item.ID = e.Id
	item.Status = e.Status
	if e.CreatedAt != nil {
		item.CreatedAt = e.CreatedAt.String()
	}
	if e.UpdatedAt != nil {
		item.UpdatedAt = e.UpdatedAt.String()
	}
	return item
}