package management

import (
	"errors"
	"strconv"

	"git.huangwc.com/pig/pig-farm-controller/internal/app/controller"
	"git.huangwc.com/pig/pig-farm-controller/internal/app/dto"
	"git.huangwc.com/pig/pig-farm-controller/internal/app/service"
	"github.com/gin-gonic/gin"
)

// SellPigs godoc
// @Summary      处理卖猪的业务逻辑
// @Description  记录猪批次中的猪只出售事件
// @Tags         猪批次管理
// @Accept       json
// @Produce      json
// @Param        id path int true "猪批次ID"
// @Param        body body dto.SellPigsRequest true "卖猪请求信息"
// @Success      200 {object} controller.Response "卖猪成功"
// @Router       /api/v1/pig-batches/{id}/sell-pigs [post]
func (c *PigBatchController) SellPigs(ctx *gin.Context) {
	const action = "卖猪"
	batchID, err := strconv.ParseUint(ctx.Param("id"), 10, 32)
	if err != nil {
		controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的猪批次ID格式", action, "ID格式错误", ctx.Param("id"))
		return
	}

	var req dto.SellPigsRequest
	if err := ctx.ShouldBindJSON(&req); err != nil {
		controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体", action, "请求体绑定失败", req)
		return
	}

	operatorID, err := controller.GetOperatorIDFromContext(ctx)

	err = c.service.SellPigs(uint(batchID), req.PenID, req.Quantity, req.UnitPrice, req.TotalPrice, req.TraderName, req.TradeDate, req.Remarks, operatorID)
	if err != nil {
		if errors.Is(err, service.ErrPigBatchNotFound) || errors.Is(err, service.ErrPenNotFound) {
			controller.SendErrorWithAudit(ctx, controller.CodeNotFound, err.Error(), action, err.Error(), batchID)
			return
		} else if errors.Is(err, service.ErrInvalidOperation) || errors.Is(err, service.ErrPigBatchNotActive) || errors.Is(err, service.ErrPenNotAssociatedWithBatch) || errors.Is(err, service.ErrPenNotEmpty) {
			controller.SendErrorWithAudit(ctx, controller.CodeConflict, err.Error(), action, err.Error(), batchID)
			return
		}
		c.logger.Errorf("%s: 业务逻辑失败: %v", action, err)
		controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "卖猪失败", action, err.Error(), batchID)
		return
	}

	controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "卖猪成功", nil, action, "卖猪成功", batchID)
}

// BuyPigs godoc
// @Summary      处理买猪的业务逻辑
// @Description  记录猪批次中的猪只购买事件
// @Tags         猪批次管理
// @Accept       json
// @Produce      json
// @Param        id path int true "猪批次ID"
// @Param        body body dto.BuyPigsRequest true "买猪请求信息"
// @Success      200 {object} controller.Response "买猪成功"
// @Router       /api/v1/pig-batches/{id}/buy-pigs [post]
func (c *PigBatchController) BuyPigs(ctx *gin.Context) {
	const action = "买猪"
	batchID, err := strconv.ParseUint(ctx.Param("id"), 10, 32)
	if err != nil {
		controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的猪批次ID格式", action, "ID格式错误", ctx.Param("id"))
		return
	}

	var req dto.BuyPigsRequest
	if err := ctx.ShouldBindJSON(&req); err != nil {
		controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体", action, "请求体绑定失败", req)
		return
	}

	operatorID, err := controller.GetOperatorIDFromContext(ctx)

	err = c.service.BuyPigs(uint(batchID), req.PenID, req.Quantity, req.UnitPrice, req.TotalPrice, req.TraderName, req.TradeDate, req.Remarks, operatorID)
	if err != nil {
		if errors.Is(err, service.ErrPigBatchNotFound) || errors.Is(err, service.ErrPenNotFound) {
			controller.SendErrorWithAudit(ctx, controller.CodeNotFound, err.Error(), action, err.Error(), batchID)
			return
		} else if errors.Is(err, service.ErrInvalidOperation) || errors.Is(err, service.ErrPigBatchNotActive) || errors.Is(err, service.ErrPenNotAssociatedWithBatch) {
			controller.SendErrorWithAudit(ctx, controller.CodeConflict, err.Error(), action, err.Error(), batchID)
			return
		}
		c.logger.Errorf("%s: 业务逻辑失败: %v", action, err)
		controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "买猪失败", action, err.Error(), batchID)
		return
	}

	controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "买猪成功", nil, action, "买猪成功", batchID)
}