package user

import (
	"context"
	"strings"

	"bindbox-game/internal/repository/mysql/model"
)

// OrderWithItems 包含订单项的订单信息
type OrderWithItems struct {
	*model.Orders
	Items        []*model.OrderItems `json:"items"`
	ActivityName string              `json:"activity_name"`
	IssueNumber  string              `json:"issue_number"`
	IsDraw       bool                `json:"is_draw"`
	IsWinner     bool                `json:"is_winner"`
	RewardLevel  int32               `json:"reward_level"`
}

func (s *service) ListOrders(ctx context.Context, userID int64, page, pageSize int) (items []*model.Orders, total int64, err error) {
	// 查询用户的所有订单，包括商城直购(1)、抽奖票据(2)和系统发放(3)
	q := s.readDB.Orders.WithContext(ctx).ReadDB().Where(s.readDB.Orders.UserID.Eq(userID))
	total, err = q.Count()
	if err != nil {
		return nil, 0, err
	}
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 20
	}
	if pageSize > 100 {
		pageSize = 100
	}
	items, err = q.Order(s.readDB.Orders.ID.Desc()).Offset((page - 1) * pageSize).Limit(pageSize).Find()
	if err != nil {
		return nil, 0, err
	}
	return items, total, nil
}

// GetOrderWithItems 查询单个订单详情
func (s *service) GetOrderWithItems(ctx context.Context, userID int64, orderID int64) (*OrderWithItems, error) {
	order, err := s.readDB.Orders.WithContext(ctx).ReadDB().Where(s.readDB.Orders.ID.Eq(orderID), s.readDB.Orders.UserID.Eq(userID)).First()
	if err != nil {
		return nil, err
	}
	if order == nil {
		return nil, nil
	}

	res := &OrderWithItems{
		Orders: order,
	}

	items, err := s.readDB.OrderItems.WithContext(ctx).ReadDB().Where(s.readDB.OrderItems.OrderID.Eq(order.ID)).Find()
	if err != nil {
		return nil, err
	}

	if len(items) > 0 {
		ids := make(map[int64]struct{})
		for _, it := range items {
			if strings.TrimSpace(it.Title) == "" || strings.TrimSpace(it.Title) == "系统发放奖励" || it.ProductImages == "" || it.ProductImages == "[]" {
				ids[it.ProductID] = struct{}{}
			}
		}
		if len(ids) > 0 {
			pidList := make([]int64, 0, len(ids))
			for id := range ids {
				pidList = append(pidList, id)
			}
			pros, err2 := s.readDB.Products.WithContext(ctx).ReadDB().Where(s.readDB.Products.ID.In(pidList...)).Find()
			if err2 != nil {
				return nil, err2
			}
			pm := make(map[int64]*model.Products, len(pros))
			for _, p := range pros {
				pm[p.ID] = p
			}
			for _, it := range items {
				p := pm[it.ProductID]
				if p == nil {
					continue
				}
				if strings.TrimSpace(it.Title) == "" || strings.TrimSpace(it.Title) == "系统发放奖励" {
					it.Title = p.Name
				}
				if it.ProductImages == "" || it.ProductImages == "[]" {
					it.ProductImages = p.ImagesJSON
				}
			}
		}
		res.Items = items
	}

	// 补充开奖信息
	log, _ := s.readDB.ActivityDrawLogs.WithContext(ctx).ReadDB().Where(s.readDB.ActivityDrawLogs.OrderID.Eq(order.ID)).First()
	if log != nil {
		res.IsDraw = true
		res.IsWinner = log.IsWinner == 1
		res.RewardLevel = log.Level
		issue, _ := s.readDB.ActivityIssues.WithContext(ctx).ReadDB().Where(s.readDB.ActivityIssues.ID.Eq(log.IssueID)).First()
		if issue != nil {
			res.IssueNumber = issue.IssueNumber
			act, _ := s.readDB.Activities.WithContext(ctx).ReadDB().Where(s.readDB.Activities.ID.Eq(issue.ActivityID)).First()
			if act != nil {
				res.ActivityName = act.Name
			}
		}
	}

	return res, nil
}

// ListOrdersWithItems 查询用户的订单列表，包含订单项详情
func (s *service) ListOrdersWithItems(ctx context.Context, userID int64, status int32, page, pageSize int) (items []*OrderWithItems, total int64, err error) {
	// 查询用户的所有订单，包括商城直购(1)、抽奖票据(2)和系统发放(3)
	q := s.readDB.Orders.WithContext(ctx).ReadDB().Where(s.readDB.Orders.UserID.Eq(userID))
	if status > 0 {
		q = q.Where(s.readDB.Orders.Status.Eq(status))
	}
	total, err = q.Count()
	if err != nil {
		return nil, 0, err
	}
	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 {
		pageSize = 20
	}
	if pageSize > 100 {
		pageSize = 100
	}

	// 查询订单列表
	orders, err := q.Order(s.readDB.Orders.ID.Desc()).Offset((page - 1) * pageSize).Limit(pageSize).Find()
	if err != nil {
		return nil, 0, err
	}

	// 构建订单ID列表
	orderIDs := make([]int64, len(orders))
	for i, order := range orders {
		orderIDs[i] = order.ID
	}

	var allItems []*model.OrderItems
	if len(orderIDs) > 0 {
		allItems, err = s.readDB.OrderItems.WithContext(ctx).ReadDB().Where(s.readDB.OrderItems.OrderID.In(orderIDs...)).Find()
		if err != nil {
			return nil, 0, err
		}

		ids := make(map[int64]struct{})
		for _, it := range allItems {
			if strings.TrimSpace(it.Title) == "" || strings.TrimSpace(it.Title) == "系统发放奖励" || it.ProductImages == "" || it.ProductImages == "[]" {
				ids[it.ProductID] = struct{}{}
			}
		}
		if len(ids) > 0 {
			pidList := make([]int64, 0, len(ids))
			for id := range ids {
				pidList = append(pidList, id)
			}
			pros, err2 := s.readDB.Products.WithContext(ctx).ReadDB().Where(s.readDB.Products.ID.In(pidList...)).Find()
			if err2 != nil {
				return nil, 0, err2
			}
			pm := make(map[int64]*model.Products, len(pros))
			for _, p := range pros {
				pm[p.ID] = p
			}
			for _, it := range allItems {
				p := pm[it.ProductID]
				if p == nil {
					continue
				}
				if strings.TrimSpace(it.Title) == "" || strings.TrimSpace(it.Title) == "系统发放奖励" {
					it.Title = p.Name
				}
				if it.ProductImages == "" || it.ProductImages == "[]" {
					it.ProductImages = p.ImagesJSON
				}
			}
		}
	}

	// 构建订单ID到订单项的映射
	itemsMap := make(map[int64][]*model.OrderItems)
	for _, item := range allItems {
		itemsMap[item.OrderID] = append(itemsMap[item.OrderID], item)
	}

	// 批量查询活动开奖信息
	drawLogsMap := make(map[int64]*model.ActivityDrawLogs)
	activityMap := make(map[int64]*model.Activities)
	issueMap := make(map[int64]*model.ActivityIssues)

	if len(orderIDs) > 0 {
		logs, _ := s.readDB.ActivityDrawLogs.WithContext(ctx).ReadDB().Where(s.readDB.ActivityDrawLogs.OrderID.In(orderIDs...)).Find()
		var issueIDs []int64
		for _, log := range logs {
			drawLogsMap[log.OrderID] = log
			issueIDs = append(issueIDs, log.IssueID)
		}

		if len(issueIDs) > 0 {
			issues, _ := s.readDB.ActivityIssues.WithContext(ctx).ReadDB().Where(s.readDB.ActivityIssues.ID.In(issueIDs...)).Find()
			var activityIDs []int64
			for _, issue := range issues {
				issueMap[issue.ID] = issue
				activityIDs = append(activityIDs, issue.ActivityID)
			}

			if len(activityIDs) > 0 {
				activities, _ := s.readDB.Activities.WithContext(ctx).ReadDB().Where(s.readDB.Activities.ID.In(activityIDs...)).Find()
				for _, act := range activities {
					activityMap[act.ID] = act
				}
			}
		}
	}

	// 构建返回结果
	items = make([]*OrderWithItems, len(orders))
	for i, order := range orders {
		items[i] = &OrderWithItems{
			Orders: order,
			Items:  itemsMap[order.ID],
		}

		if log, ok := drawLogsMap[order.ID]; ok {
			items[i].IsDraw = true
			items[i].IsWinner = log.IsWinner == 1
			items[i].RewardLevel = log.Level
			if issue, ok := issueMap[log.IssueID]; ok {
				items[i].IssueNumber = issue.IssueNumber
				if act, ok := activityMap[issue.ActivityID]; ok {
					items[i].ActivityName = act.Name
				}
			}
		}
	}

	return items, total, nil
}