package controllers

import (
	"bytes"
	"errors"
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/sirupsen/logrus"
	"psi/constant"
	"psi/database"
	"psi/models"
	systemReq "psi/models/request"
	systemRes "psi/models/response"
	"psi/service"
	"psi/utils"
	"strconv"
)

type ProcessApi struct{}

var processService = &service.ProcessService{}

// CreatePurchaseOrderWithWave 创建采购单并生成入库波次
func (r *ProcessApi) CreatePurchaseOrderWithWave(c *gin.Context) {
	var req systemReq.PurchaseOrderCreateRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "创建采购单请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	carService := &service.CarService{}
	capacity, err := carService.GetCarCapacityByID(req.CarID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "查询小车容量异常", err, c, gin.H{"car_id": req.CarID})
		return
	}

	if len(req.Items) == 0 {
		items, err := bindPurchaseOrderItems(c, int(capacity))
		if err != nil {
			logAndFail(constant.LoggerChannelRequest, "绑定采购订单项异常", "参数错误: "+err.Error(), c)
			return
		}
		req.Items = items
	}

	userInfo := utils.GetUserInfo(c)
	purchaseOrderID, waveID, err := processService.CreatePurchaseOrderWithWave(req, userInfo.Username, userInfo.ID, int(capacity), database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "创建采购单及波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(gin.H{"order_id": purchaseOrderID, "wave_id": waveID}, "采购单创建成功，波次已生成", c)
}

// ReleaseWave 提交波次，生成采购订单明细和波次任务明细
func (r *ProcessApi) ReleaseWave(c *gin.Context) {
	var req systemReq.WaveRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "提交波次请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	carService := &service.CarService{}
	capacity, err := carService.GetCarCapacityByID(req.CarID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "查询小车容量异常", err, c, gin.H{"car_id": req.CarID})
		return
	}

	if len(req.Items) == 0 {
		items, err := bindWaveItems(c, int(capacity))
		if err != nil {
			logAndFail(constant.LoggerChannelRequest, "绑定波次项异常", "参数错误: "+err.Error(), c)
			return
		}
		req.Items = items
	}

	waveID, waveNo, err := processService.ReleaseWave(req, capacity, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "提交波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(systemRes.WaveReleaseResponse{
		WaveID: waveID,
		WaveNo: waveNo,
	}, "波次提交成功，任务和明细已生成", c)
}

// BindWave 绑定波次，创建入库单
func (r *ProcessApi) BindWave(c *gin.Context) {
	var req systemReq.BindWaveRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "绑定波次请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	receivingOrderID, waveTaskID, waveTaskBatchNo, err := processService.BindWave(req, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "绑定波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(map[string]interface{}{
		"receiving_order_id": receivingOrderID,
		"wave_task_id":       waveTaskID,
		"wave_task_batch_no": waveTaskBatchNo,
	}, "绑定波次成功，入库单已创建", c)
}

// GetWaveTaskInfo 获取波次任务信息
func (r *ProcessApi) GetWaveTaskInfo(c *gin.Context) {
	id, err := parsePathID(c, "id", "获取波次任务信息")
	if err != nil {
		return
	}

	info, err := processService.GetWaveTaskInfo(id, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "获取波次任务信息异常", err, c, gin.H{"id": id})
		return
	}

	systemRes.OkWithDetailed(info, "获取成功", c)
}

// SubmitReceiving 提交入库
func (r *ProcessApi) SubmitReceiving(c *gin.Context) {
	var req systemReq.ReceivingSubmitRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "提交入库请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	if len(req.Items) == 0 {
		databaseConn := database.GetDB(c)
		var waveTask models.WaveTask
		if err := databaseConn.Where("id = ? AND is_del = 0", req.WaveTaskID).First(&waveTask).Error; err != nil {
			logAndFail(constant.LoggerChannelWork, "查询波次任务失败", "错误: "+err.Error(), c)
			return
		}

		carCapacity := int(waveTask.CarCapacity)
		if carCapacity <= 0 {
			logAndFail(constant.LoggerChannelWork, "波次任务未设置小车容量", fmt.Sprintf("wave_task_id: %d", req.WaveTaskID), c)
			return
		}
		items, err := bindReceivingItems(c, carCapacity)
		if err != nil {
			logAndFail(constant.LoggerChannelRequest, "绑定入库项异常", "参数错误: "+err.Error(), c)
			return
		}
		req.Items = items
	}

	userInfo := utils.GetUserInfo(c)
	err := processService.SubmitReceiving(req, userInfo.Username, userInfo.ID, userInfo.AboutID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "提交入库异常", err, c, req)
		return
	}

	go func(receivingOrderID, aboutID, waveTaskID int64, itemProductIDs []int64) {
		databaseConn := database.DB

		var receivingOrder models.ReceivingOrder
		if err := databaseConn.Where("id = ? AND is_del = 0", receivingOrderID).First(&receivingOrder).Error; err != nil {
			utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
				"source":             "查询入库单失败",
				"receiving_order_id": receivingOrderID,
				"err_msg":            err.Error(),
			})
			return
		}

		var warehouse models.Warehouse
		if err := databaseConn.Where("id = ? AND is_del = 0", receivingOrder.WarehouseID).First(&warehouse).Error; err != nil {
			utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
				"source":       "查询仓库失败",
				"warehouse_id": receivingOrder.WarehouseID,
				"err_msg":      err.Error(),
			})
			return
		}

		warehouseId := warehouse.ID

		productIds := make([]string, len(itemProductIDs))
		for i, pid := range itemProductIDs {
			productIds[i] = fmt.Sprintf("%d", pid)
		}
		productIdsStr := strings.Join(productIds, ",")

		url := "https://erp.buzhiyushu.cn/zhishu/product/releaseGoodsAuto"
		method := "POST"

		payload := &bytes.Buffer{}
		writer := multipart.NewWriter(payload)
		_ = writer.WriteField("userId", fmt.Sprintf("%d", aboutID))
		_ = writer.WriteField("warehouseId", fmt.Sprintf("%d", warehouseId))
		_ = writer.WriteField("productId", productIdsStr)
		err := writer.Close()
		if err != nil {
			utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
				"source":  "关闭multipart writer失败",
				"err_msg": err.Error(),
			})
			return
		}

		client := &http.Client{}
		req, err := http.NewRequest(method, url, payload)

		if err != nil {
			utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
				"source":  "创建HTTP请求失败",
				"err_msg": err.Error(),
			})
			return
		}
		req.Header.Add("Authorization", "Basic ZWxhc3RpYzo1bVJESVVnNTJWQzBmcDE0bnctRg==")
		req.Header.Set("Content-Type", writer.FormDataContentType())

		res, err := client.Do(req)
		if err != nil {
			utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
				"source":  "调用外部API失败",
				"err_msg": err.Error(),
			})
			return
		}
		defer func(Body io.ReadCloser) {
			err := Body.Close()
			if err != nil {
				utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
					"source":  "调用外部API失败-Body关闭失败",
					"err_msg": err.Error(),
				})
			}
		}(res.Body)

		body, err := io.ReadAll(res.Body)
		if err != nil {
			utils.ErrorLog(constant.LoggerChannelWork, logrus.Fields{
				"source":  "读取响应失败",
				"err_msg": err.Error(),
			})
			return
		}

		utils.InfoLog(constant.LoggerChannelWork, logrus.Fields{
			"source":       "外部API调用完成",
			"user_id":      aboutID,
			"warehouse_id": warehouseId,
			"product_ids":  productIdsStr,
			"status_code":  res.StatusCode,
			"response":     string(body),
		})
	}(req.ReceivingOrderID, userInfo.AboutID, req.WaveTaskID, func() []int64 {
		productIDs := make([]int64, len(req.Items))
		for i, item := range req.Items {
			productIDs[i] = item.ProductID
		}
		return productIDs
	}())

	systemRes.OkWithMessage("入库提交成功", c)
}

// GetReceivingDetail 获取入库单详情
func (r *ProcessApi) GetReceivingDetail(c *gin.Context) {
	id, err := parsePathID(c, "id", "获取入库单详情")
	if err != nil {
		return
	}

	detail, err := processService.GetReceivingDetail(id, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "获取入库单详情异常", err, c, gin.H{"id": id})
		return
	}

	systemRes.OkWithDetailed(detail, "获取成功", c)
}

// CreateSalesOrderWithDetail 创建销售订单和明细
func (r *ProcessApi) CreateSalesOrderWithDetail(c *gin.Context) {
	var req systemReq.SalesOrderCreateRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "创建销售订单请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	if len(req.Items) == 0 {
		items, err := bindSalesOrderItems(c)
		if err != nil {
			logAndFail(constant.LoggerChannelRequest, "绑定销售订单项异常", "参数错误: "+err.Error(), c)
			return
		}
		req.Items = items
	}

	salesOrderID, err := processService.CreateSalesOrderWithDetail(req)
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "创建销售订单及波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(gin.H{"order_id": salesOrderID}, "销售订单创建成功", c)
}

// CreateOutboundOrder 基于多个销售订单创建出库单
func (r *ProcessApi) CreateOutboundOrder(c *gin.Context) {
	var req systemReq.CreateOutboundOrderRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "创建出库单请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	if len(req.SalesOrderIDs) == 0 {
		ids, err := parseIdsFrom(c, req.Total)
		if err != nil {
			systemRes.FailWithMessage("参数错误: "+err.Error(), c)
			return
		}
		req.SalesOrderIDs = ids
	}

	userInfo := utils.GetUserInfo(c)
	outboundOrderID, outNo, err := processService.CreateOutboundOrder(req, userInfo.Username, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "创建出库单异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(gin.H{
		"outbound_order_id": outboundOrderID,
		"out_no":            outNo,
	}, "出库单创建成功", c)
}

// CreateOutboundWave 基于出库单创建出库波次
func (r *ProcessApi) CreateOutboundWave(c *gin.Context) {
	var req systemReq.CreateOutboundWaveRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "创建出库波次请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	if req.OutboundOrderID == 0 {
		systemRes.FailWithMessage("参数错误: 出库单ID不能为空", c)
		return
	}

	userInfo := utils.GetUserInfo(c)
	waveID, err := processService.CreateOutboundWave(req, userInfo.Username, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "创建出库波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(systemRes.WaveReleaseResponse{
		WaveID: waveID,
	}, "出库波次创建成功", c)
}

// ReleaseOutboundWave 提交出库波次，生成波次任务明细
func (r *ProcessApi) ReleaseOutboundWave(c *gin.Context) {
	var req systemReq.WaveRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "提交出库波次请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	waveID, waveNo, err := processService.ReleaseOutboundWave(req, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "提交出库波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(systemRes.WaveReleaseResponse{
		WaveID: waveID,
		WaveNo: waveNo,
	}, "出库波次提交成功，任务和明细已生成", c)
}

// BindOutboundWave 绑定出库波次
func (r *ProcessApi) BindOutboundWave(c *gin.Context) {
	var req systemReq.BindWaveRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "绑定出库波次请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	outboundOrderID, waveTaskID, waveTaskBatchNo, err := processService.BindOutboundWave(req, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "绑定出库波次异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(map[string]interface{}{
		"out_order_id":       outboundOrderID,
		"wave_task_id":       waveTaskID,
		"wave_task_batch_no": waveTaskBatchNo,
	}, "绑定出库波次成功", c)
}

// SubmitOutbound 提交出库
func (r *ProcessApi) SubmitOutbound(c *gin.Context) {
	var req systemReq.OutboundSubmitRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "提交出库请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	if len(req.Items) == 0 {
		databaseConn := database.GetDB(c)
		var waveTask models.WaveTask
		if err := databaseConn.Where("id = ? AND is_del = 0", req.WaveTaskID).First(&waveTask).Error; err != nil {
			logAndFail(constant.LoggerChannelWork, "查询波次任务失败", "错误: "+err.Error(), c)
			return
		}

		var count int64
		if err := databaseConn.Model(&models.WaveTaskDetail{}).Where("wave_task_id = ? AND status = 1 AND is_del = 0", waveTask.ID).Count(&count).Error; err != nil {
			logAndFail(constant.LoggerChannelWork, "查询波次任务明细数量失败", "错误: "+err.Error(), c)
			return
		}

		items, err := bindOutboundItems(c, int(count))
		if err != nil {
			logAndFail(constant.LoggerChannelRequest, "绑定出库项异常", "参数错误: "+err.Error(), c)
			return
		}
		req.Items = items
	}

	userInfo := utils.GetUserInfo(c)
	err := processService.SubmitOutbound(req, userInfo.Username, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "提交出库异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("出库提交成功", c)
}

// GetOutboundDetail 获取发货单详情
func (r *ProcessApi) GetOutboundDetail(c *gin.Context) {
	id, err := parsePathID(c, "id", "获取发货单详情")
	if err != nil {
		return
	}

	detail, err := processService.GetOutboundDetail(id, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "获取发货单详情异常", err, c, gin.H{"id": id})
		return
	}

	systemRes.OkWithDetailed(detail, "获取成功", c)
}

// CreateShippingOrder 基于多个出库单创建发货单
func (r *ProcessApi) CreateShippingOrder(c *gin.Context) {
	var req systemReq.CreateShippingOrderRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "创建发货单请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	if len(req.OutboundOrderIDs) == 0 {
		ids, err := parseIdsFrom(c, req.Total)
		if err != nil {
			systemRes.FailWithMessage("参数错误: "+err.Error(), c)
			return
		}
		req.OutboundOrderIDs = ids
	}

	userInfo := utils.GetUserInfo(c)
	shippingOrderID, shippingNo, err := processService.CreateShippingOrder(req, userInfo.Username, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "创建发货单异常", err, c, req)
		return
	}

	systemRes.OkWithDetailed(gin.H{
		"shipping_order_id": shippingOrderID,
		"shipping_no":       shippingNo,
	}, "发货单创建成功", c)
}

// UpdateShippingLogistics 更新发货单物流信息并回填销售订单明细
func (r *ProcessApi) UpdateShippingLogistics(c *gin.Context) {
	var req systemReq.UpdateShippingLogisticsRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "更新发货单物流信息请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	userInfo := utils.GetUserInfo(c)
	err := processService.UpdateShippingLogistics(req, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "更新发货单物流信息异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("更新成功", c)
}

// CancelSalesOrder 取消销售订单
func (r *ProcessApi) CancelSalesOrder(c *gin.Context) {
	var req systemReq.CancelSalesOrderRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "取消销售订单请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	userInfo := utils.GetUserInfo(c)
	err := processService.CancelSalesOrder(req.OrderID, userInfo.Username, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "取消销售订单异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("销售订单取消成功，库存已释放", c)
}

// CancelOutboundWave 取消出库波次
func (r *ProcessApi) CancelOutboundWave(c *gin.Context) {
	var req systemReq.CancelOutboundWaveRequest

	if err := c.ShouldBindJSON(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "取消出库波次请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	userInfo := utils.GetUserInfo(c)
	err := processService.CancelOutboundWave(req.WaveID, userInfo.Username, userInfo.ID, database.GetDB(c))
	if err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "取消出库波次异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("出库波次取消成功，库存已释放", c)
}

// AdjustInventory 盘库调整（加库存/减库存）
func (r *ProcessApi) AdjustInventory(c *gin.Context) {
	var req systemReq.StockCheckAdjustRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "盘库调整请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	userInfo := utils.GetUserInfo(c)
	if err := processService.AdjustInventory(req, userInfo.Username, userInfo.ID, database.GetDB(c)); err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "盘库调整异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("盘库调整成功", c)
}

// ReturnInventory 盘库退货
func (r *ProcessApi) ReturnInventory(c *gin.Context) {
	var req systemReq.StockCheckReturnRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "盘库退货请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	userInfo := utils.GetUserInfo(c)
	if err := processService.ReturnInventory(req, userInfo.Username, userInfo.ID, database.GetDB(c)); err != nil {
		utils.FailWithRequestLog(constant.LoggerChannelWork, "盘库退货异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("盘库退货成功", c)
}

// ChangeLocation 出库单切换库位
func (r *ProcessApi) ChangeLocation(c *gin.Context) {
	var req systemReq.ChangeLocationRequest

	if err := c.ShouldBind(&req); err != nil {
		ValidAndFail(constant.LoggerChannelRequest, "出库单切换库位请求参数异常", "参数错误: "+err.Error(), c, err)
		return
	}

	userInfo := utils.GetUserInfo(c)
	if err := processService.ChangeLocation(req, userInfo.Username, userInfo.ID, database.GetDB(c)); err != nil {
		if errors.Is(err, utils.ErrNoAvailableLocation) {
			c.Status(http.StatusNoContent)
			return
		}
		utils.FailWithRequestLog(constant.LoggerChannelWork, "出库单切换库位异常", err, c, req)
		return
	}

	systemRes.OkWithMessage("库位切换成功", c)
}

// parsePathID 从URL路径参数中获取并验证ID
func parsePathID(c *gin.Context, paramName, source string) (int64, error) {
	idStr := c.Param(paramName)

	if idStr == "" {
		utils.ErrorLog(constant.LoggerChannelRequest, logrus.Fields{
			"source":  source + "请求参数异常",
			"err_msg": "ID参数不能为空",
		})
		systemRes.FailWithValidateMessage("参数错误: ID不能为空", c)
		return 0, fmt.Errorf("ID参数不能为空")
	}

	var id int64
	if _, err := fmt.Sscanf(idStr, "%d", &id); err != nil || id <= 0 {
		utils.ErrorLog(constant.LoggerChannelRequest, logrus.Fields{
			"source":  source + "请求参数异常",
			"err_msg": "ID格式错误: " + idStr,
		})
		systemRes.FailWithValidateMessage("参数错误: ID格式不正确", c)
		return 0, fmt.Errorf("ID格式错误")
	}

	return id, nil
}

// parseOptionalDate 解析可选日期字段
func parseOptionalDate(c *gin.Context, key string) int64 {
	if str := c.PostForm(key); str != "" {
		if val, err := strconv.ParseInt(str, 10, 64); err == nil {
			return val
		}
	}
	return 0
}

// bindSimpleItem 绑定简单项（ProductID + Quantity + UnitPrice）
func bindSimpleItem[T any](c *gin.Context, i int, creator func(int64, int64, int64) T) (T, bool, error) {
	var zero T

	productID, hasProduct, err := getPostFormInt64(c, fmt.Sprintf("items[%d][product_id]", i))
	if err != nil || !hasProduct {
		return zero, false, err
	}

	quantity, hasQuantity, err := getPostFormInt64(c, fmt.Sprintf("items[%d][quantity]", i))
	if err != nil || !hasQuantity {
		return zero, false, err
	}

	unitPrice, hasPrice, err := getPostFormInt64(c, fmt.Sprintf("items[%d][unit_price]", i))
	if err != nil || !hasPrice {
		return zero, false, err
	}

	return creator(productID, quantity, unitPrice), true, nil
}

// bindLocationItem 绑定带位置信息的项（ProductID + LocationID + Quantity + 批次信息）
func bindLocationItem[T any](c *gin.Context, i int, creator func(int64, int64, string, int64, int64, int64) T) (T, bool, error) {
	var zero T

	productID, hasProduct, err := getPostFormInt64(c, fmt.Sprintf("items[%d][product_id]", i))
	if err != nil || !hasProduct {
		return zero, false, err
	}

	locationID, hasLocation, err := getPostFormInt64(c, fmt.Sprintf("items[%d][location_id]", i))
	if err != nil || !hasLocation {
		return zero, false, err
	}

	quantity, hasQuantity, err := getPostFormInt64(c, fmt.Sprintf("items[%d][quantity]", i))
	if err != nil || !hasQuantity {
		return zero, false, err
	}

	batchNo := c.PostForm(fmt.Sprintf("items[%d][batch_no]", i))
	productionDate := parseOptionalDate(c, fmt.Sprintf("items[%d][production_date]", i))
	expiryDate := parseOptionalDate(c, fmt.Sprintf("items[%d][expiry_date]", i))

	return creator(productID, locationID, batchNo, productionDate, expiryDate, quantity), true, nil
}

// bindPurchaseOrderItems 绑定采购订单项
func bindPurchaseOrderItems(c *gin.Context, capacity int) ([]systemReq.PurchaseOrderItemRequest, error) {
	return bindItemsWithForm(c, func(i int) (systemReq.PurchaseOrderItemRequest, bool, error) {
		return bindSimpleItem(c, i, func(productID, quantity, unitPrice int64) systemReq.PurchaseOrderItemRequest {
			return systemReq.PurchaseOrderItemRequest{
				ProductID: productID,
				Quantity:  quantity,
				UnitPrice: unitPrice,
			}
		})
	}, capacity)
}

// bindWaveItems 绑定波次项
func bindWaveItems(c *gin.Context, capacity int) ([]systemReq.WaveItemRequest, error) {
	return bindItemsWithForm(c, func(i int) (systemReq.WaveItemRequest, bool, error) {
		return bindSimpleItem(c, i, func(productID, quantity, unitPrice int64) systemReq.WaveItemRequest {
			return systemReq.WaveItemRequest{
				ProductID: productID,
				Quantity:  quantity,
				UnitPrice: unitPrice,
			}
		})
	}, capacity)
}

// bindReceivingItems 绑定入库项
func bindReceivingItems(c *gin.Context, maxItems int) ([]systemReq.ReceivingItemRequest, error) {
	return bindItemsWithForm(c, func(i int) (systemReq.ReceivingItemRequest, bool, error) {
		return bindLocationItem(c, i, func(productID, locationID int64, batchNo string, productionDate, expiryDate, quantity int64) systemReq.ReceivingItemRequest {
			return systemReq.ReceivingItemRequest{
				ProductID:      productID,
				LocationID:     locationID,
				BatchNo:        batchNo,
				ProductionDate: productionDate,
				ExpiryDate:     expiryDate,
				Quantity:       quantity,
			}
		})
	}, maxItems)
}

// bindSalesOrderItems 绑定销售订单项
func bindSalesOrderItems(c *gin.Context) ([]systemReq.SalesOrderItemRequest, error) {
	return bindItemsWithForm(c, func(i int) (systemReq.SalesOrderItemRequest, bool, error) {
		return bindSimpleItem(c, i, func(productID, quantity, unitPrice int64) systemReq.SalesOrderItemRequest {
			return systemReq.SalesOrderItemRequest{
				ProductID: productID,
				Quantity:  quantity,
				UnitPrice: unitPrice,
			}
		})
	}, 200)
}

// bindOutboundItems 绑定出库项
func bindOutboundItems(c *gin.Context, maxItems int) ([]systemReq.OutboundItemRequest, error) {
	return bindItemsWithForm(c, func(i int) (systemReq.OutboundItemRequest, bool, error) {
		return bindLocationItem(c, i, func(productID, locationID int64, batchNo string, productionDate, expiryDate, quantity int64) systemReq.OutboundItemRequest {
			return systemReq.OutboundItemRequest{
				ProductID:      productID,
				LocationID:     locationID,
				BatchNo:        batchNo,
				ProductionDate: productionDate,
				ExpiryDate:     expiryDate,
				Quantity:       quantity,
			}
		})
	}, maxItems)
}

// bindItemsWithForm 通用表单项绑定函数
func bindItemsWithForm[T any](c *gin.Context, builder func(int) (T, bool, error), maxItems int) ([]T, error) {
	items := make([]T, 0)
	for i := 0; i < maxItems; i++ {
		item, hasData, err := builder(i)
		if err != nil {
			return nil, err
		}
		if !hasData {
			continue
		}
		items = append(items, item)
	}
	return items, nil
}

func parseIdsFrom(c *gin.Context, total int) ([]int64, error) {
	var ids []int64

	for i := 0; i < total; i++ {
		idStr := c.PostForm(fmt.Sprintf("order_ids[%d]", i))
		if idStr == "" {
			break
		}

		var id int64
		if _, err := fmt.Sscanf(idStr, "%d", &id); err != nil {
			return nil, fmt.Errorf("第%d个ID格式错误", i)
		}
		if id <= 0 {
			return nil, fmt.Errorf("第%d个ID必须大于0", i)
		}
		ids = append(ids, id)
	}

	if len(ids) == 0 {
		return nil, fmt.Errorf("至少需要一个ID")
	}

	return ids, nil
}

// getPostFormInt64 获取表单中的int64值
func getPostFormInt64(c *gin.Context, key string) (int64, bool, error) {
	str := c.PostForm(key)
	if str == "" {
		return 0, false, nil
	}
	val, err := strconv.ParseInt(str, 10, 64)
	if err != nil {
		return 0, true, err
	}
	return val, true, nil
}

// logAndFail 业务统一的错误日志和响应函数
func logAndFail(channel string, source, errMsg string, c *gin.Context) {
	utils.ErrorLog(channel, logrus.Fields{
		"source":  source,
		"err_msg": errMsg,
	})
	systemRes.FailWithMessage(errMsg, c)
}

// ValidAndFail 参数统一的错误日志和响应函数
func ValidAndFail(channel string, source, errMsg string, c *gin.Context, err error) {
	utils.ErrorLog(channel, logrus.Fields{
		"source":  source,
		"err_msg": errMsg,
	})
	utils.HandleValidationError(c, err)
}