package user

import (
	"context"

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

type InventoryWithProduct struct {
	*model.UserInventory
	ProductName    string `json:"product_name"`
	ProductImages  string `json:"product_images"`
	HasShipment    bool   `json:"has_shipment"`
	ShippingStatus int32  `json:"shipping_status"`
}

func (s *service) ListInventoryWithProduct(ctx context.Context, userID int64, page, pageSize int) (items []*InventoryWithProduct, total int64, err error) {
	q := s.readDB.UserInventory.WithContext(ctx).ReadDB().Where(s.readDB.UserInventory.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
	}
	rows, err := q.Order(s.readDB.UserInventory.ID.Desc()).Offset((page - 1) * pageSize).Limit(pageSize).Find()
	if err != nil {
		return nil, 0, err
	}
	pidMap := make(map[int64]struct{})
	invIDs := make([]int64, 0, len(rows))
	for _, r := range rows {
		invIDs = append(invIDs, r.ID)
		if r.ProductID > 0 {
			pidMap[r.ProductID] = struct{}{}
		}
	}
	products := map[int64]*model.Products{}
	if len(pidMap) > 0 {
		ids := make([]int64, 0, len(pidMap))
		for id := range pidMap {
			ids = append(ids, id)
		}
		pros, err := s.readDB.Products.WithContext(ctx).ReadDB().Where(s.readDB.Products.ID.In(ids...)).Find()
		if err != nil {
			return nil, 0, err
		}
		for _, p := range pros {
			products[p.ID] = p
		}
	}
	// 查询发货记录，按 inventory 维度取最新状态
	shipMap := map[int64]*model.ShippingRecords{}
	if len(invIDs) > 0 {
		ships, _ := s.readDB.ShippingRecords.WithContext(ctx).ReadDB().Where(s.readDB.ShippingRecords.InventoryID.In(invIDs...)).Order(s.readDB.ShippingRecords.UpdatedAt.Desc(), s.readDB.ShippingRecords.ID.Desc()).Find()
		for _, sh := range ships {
			if _, ok := shipMap[sh.InventoryID]; !ok {
				shipMap[sh.InventoryID] = sh
			}
		}
	}
	items = make([]*InventoryWithProduct, len(rows))
	for i, r := range rows {
		p := products[r.ProductID]
		name := ""
		images := ""
		if p != nil {
			name = p.Name
			images = p.ImagesJSON
		}
		sh := shipMap[r.ID]
		has := sh != nil && sh.Status != 5
		var st int32
		if sh != nil {
			st = sh.Status
		}
		items[i] = &InventoryWithProduct{UserInventory: r, ProductName: name, ProductImages: images, HasShipment: has, ShippingStatus: st}
	}
	return items, total, nil
}

func (s *service) ListInventoryWithProductActive(ctx context.Context, userID int64, page, pageSize int) (items []*InventoryWithProduct, total int64, err error) {
	q := s.readDB.UserInventory.WithContext(ctx).ReadDB().Where(
		s.readDB.UserInventory.UserID.Eq(userID),
		s.readDB.UserInventory.Status.Neq(2),
	)
	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
	}
	rows, err := q.Order(s.readDB.UserInventory.ID.Desc()).Offset((page - 1) * pageSize).Limit(pageSize).Find()
	if err != nil {
		return nil, 0, err
	}
	pidMap := make(map[int64]struct{})
	invIDs := make([]int64, 0, len(rows))
	for _, r := range rows {
		invIDs = append(invIDs, r.ID)
		if r.ProductID > 0 {
			pidMap[r.ProductID] = struct{}{}
		}
	}
	products := map[int64]*model.Products{}
	if len(pidMap) > 0 {
		ids := make([]int64, 0, len(pidMap))
		for id := range pidMap {
			ids = append(ids, id)
		}
		pros, err := s.readDB.Products.WithContext(ctx).ReadDB().Where(s.readDB.Products.ID.In(ids...)).Find()
		if err != nil {
			return nil, 0, err
		}
		for _, p := range pros {
			products[p.ID] = p
		}
	}
	shipMap := map[int64]*model.ShippingRecords{}
	if len(invIDs) > 0 {
		ships, _ := s.readDB.ShippingRecords.WithContext(ctx).ReadDB().Where(s.readDB.ShippingRecords.InventoryID.In(invIDs...)).Order(s.readDB.ShippingRecords.UpdatedAt.Desc(), s.readDB.ShippingRecords.ID.Desc()).Find()
		for _, sh := range ships {
			if _, ok := shipMap[sh.InventoryID]; !ok {
				shipMap[sh.InventoryID] = sh
			}
		}
	}
	items = make([]*InventoryWithProduct, len(rows))
	for i, r := range rows {
		p := products[r.ProductID]
		name := ""
		images := ""
		if p != nil {
			name = p.Name
			images = p.ImagesJSON
		}
		sh := shipMap[r.ID]
		has := sh != nil && sh.Status != 5
		var st int32
		if sh != nil {
			st = sh.Status
		}
		items[i] = &InventoryWithProduct{UserInventory: r, ProductName: name, ProductImages: images, HasShipment: has, ShippingStatus: st}
	}
	return items, total, nil
}