package feed

import (
	"context"
	"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"
	"git.huangwc.com/pig/pig-farm-controller/internal/domain/recipe"
	"git.huangwc.com/pig/pig-farm-controller/internal/infra/logs"

	"github.com/labstack/echo/v4"
)

// RecipeController 包含配方相关的处理器
type RecipeController struct {
	ctx           context.Context
	recipeService service.RecipeService
}

// NewRecipeController 创建一个新的 RecipeController
func NewRecipeController(ctx context.Context, recipeService service.RecipeService) *RecipeController {
	return &RecipeController{
		ctx:           ctx,
		recipeService: recipeService,
	}
}

// CreateRecipe godoc
// @Summary      创建配方
// @Description  创建一个新的配方，包含其原料组成。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Accept       json
// @Produce      json
// @Param        recipe body dto.CreateRecipeRequest true "配方信息"
// @Success      200 {object} controller.Response{data=dto.RecipeResponse} "业务码为201代表创建成功"
// @Router       /api/v1/feed/recipes [post]
func (c *RecipeController) CreateRecipe(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "CreateRecipe")
	var req dto.CreateRecipeRequest
	const actionType = "创建配方"
	if err := ctx.Bind(&req); err != nil {
		logger.Errorf("%s: 参数绑定失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体: "+err.Error(), actionType, "请求体绑定失败", req)
	}

	resp, err := c.recipeService.CreateRecipe(reqCtx, &req)
	if err != nil {
		logger.Errorf("%s: 服务层创建配方失败: %v", actionType, err)
		if errors.Is(err, recipe.ErrRecipeNameConflict) {
			return controller.SendErrorWithAudit(ctx, controller.CodeConflict, err.Error(), actionType, "配方名称已存在", req)
		}
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "创建配方失败: "+err.Error(), actionType, "服务层创建配方失败", req)
	}

	logger.Infof("%s: 配方创建成功, ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeCreated, "配方创建成功", resp, actionType, "配方创建成功", resp)
}

// UpdateRecipe godoc
// @Summary      更新配方
// @Description  根据ID更新配方信息及其原料组成。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Accept       json
// @Produce      json
// @Param        id path int true "配方ID"
// @Param        recipe body dto.UpdateRecipeRequest true "更新后的配方信息"
// @Success      200 {object} controller.Response{data=dto.RecipeResponse} "业务码为200代表更新成功"
// @Router       /api/v1/feed/recipes/{id} [put]
func (c *RecipeController) UpdateRecipe(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "UpdateRecipe")
	const actionType = "更新配方"
	idStr := ctx.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		logger.Errorf("%s: 配方ID格式错误: %v, ID: %s", actionType, err, idStr)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的配方ID格式", actionType, "配方ID格式错误", idStr)
	}

	var req dto.UpdateRecipeRequest
	if err := ctx.Bind(&req); err != nil {
		logger.Errorf("%s: 参数绑定失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的请求体: "+err.Error(), actionType, "请求体绑定失败", req)
	}

	resp, err := c.recipeService.UpdateRecipe(reqCtx, uint32(id), &req)
	if err != nil {
		logger.Errorf("%s: 服务层更新配方失败: %v, ID: %d", actionType, err, id)
		if errors.Is(err, recipe.ErrRecipeNotFound) {
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, err.Error(), actionType, "配方不存在", id)
		}
		if errors.Is(err, recipe.ErrRecipeNameConflict) {
			return controller.SendErrorWithAudit(ctx, controller.CodeConflict, err.Error(), actionType, "配方名称已存在", req)
		}
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "更新配方失败: "+err.Error(), actionType, "服务层更新配方失败", req)
	}

	logger.Infof("%s: 配方更新成功, ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "配方更新成功", resp, actionType, "配方更新成功", resp)
}

// DeleteRecipe godoc
// @Summary      删除配方
// @Description  根据ID删除配方。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Produce      json
// @Param        id path int true "配方ID"
// @Success      200 {object} controller.Response "业务码为200代表删除成功"
// @Router       /api/v1/feed/recipes/{id} [delete]
func (c *RecipeController) DeleteRecipe(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "DeleteRecipe")
	const actionType = "删除配方"
	idStr := ctx.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		logger.Errorf("%s: 配方ID格式错误: %v, ID: %s", actionType, err, idStr)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的配方ID格式", actionType, "配方ID格式错误", idStr)
	}

	err = c.recipeService.DeleteRecipe(reqCtx, uint32(id))
	if err != nil {
		logger.Errorf("%s: 服务层删除配方失败: %v, ID: %d", actionType, err, id)
		if errors.Is(err, recipe.ErrRecipeNotFound) {
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, err.Error(), actionType, "配方不存在", id)
		}
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "删除配方失败: "+err.Error(), actionType, "服务层删除配方失败", id)
	}

	logger.Infof("%s: 配方删除成功, ID: %d", actionType, id)
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "配方删除成功", nil, actionType, "配方删除成功", id)
}

// GetRecipe godoc
// @Summary      获取配方详情
// @Description  根据ID获取单个配方的详细信息。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Produce      json
// @Param        id path int true "配方ID"
// @Success      200 {object} controller.Response{data=dto.RecipeResponse} "业务码为200代表成功获取"
// @Router       /api/v1/feed/recipes/{id} [get]
func (c *RecipeController) GetRecipe(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "GetRecipe")
	const actionType = "获取配方详情"
	idStr := ctx.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		logger.Errorf("%s: 配方ID格式错误: %v, ID: %s", actionType, err, idStr)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的配方ID格式", actionType, "配方ID格式错误", idStr)
	}

	resp, err := c.recipeService.GetRecipeByID(reqCtx, uint32(id))
	if err != nil {
		logger.Errorf("%s: 服务层获取配方详情失败: %v, ID: %d", actionType, err, id)
		if errors.Is(err, recipe.ErrRecipeNotFound) {
			return controller.SendErrorWithAudit(ctx, controller.CodeNotFound, err.Error(), actionType, "配方不存在", id)
		}
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "获取配方详情失败: "+err.Error(), actionType, "服务层获取配方详情失败", id)
	}

	logger.Infof("%s: 获取配方详情成功, ID: %d", actionType, id)
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "获取配方详情成功", resp, actionType, "获取配方详情成功", resp)
}

// ListRecipes godoc
// @Summary      获取配方列表
// @Description  获取所有配方的列表，支持分页和过滤。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Produce      json
// @Param        query query dto.ListRecipeRequest false "查询参数"
// @Success      200 {object} controller.Response{data=dto.ListRecipeResponse} "业务码为200代表成功获取列表"
// @Router       /api/v1/feed/recipes [get]
func (c *RecipeController) ListRecipes(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "ListRecipes")
	const actionType = "获取配方列表"
	var req dto.ListRecipeRequest
	if err := ctx.Bind(&req); err != nil {
		logger.Errorf("%s: 查询参数绑定失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的查询参数: "+err.Error(), actionType, "查询参数绑定失败", req)
	}

	resp, err := c.recipeService.ListRecipes(reqCtx, &req)
	if err != nil {
		logger.Errorf("%s: 服务层获取配方列表失败: %v", actionType, err)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "获取配方列表失败: "+err.Error(), actionType, "服务层获取配方列表失败", nil)
	}

	logger.Infof("%s: 获取配方列表成功, 数量: %d", actionType, len(resp.List))
	return controller.SendSuccessWithAudit(ctx, controller.CodeSuccess, "获取配方列表成功", resp, actionType, "获取配方列表成功", resp)
}

// GenerateFromAllMaterials godoc
// @Summary      使用系统中所有可用的原料一键生成配方
// @Description  根据指定的猪类型ID，使用系统中所有可用的原料，自动计算并创建一个成本最优的配方。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Produce      json
// @Param        pig_type_id path int true "猪类型ID"
// @Success      201 {object} controller.Response{data=dto.GenerateRecipeResponse} "业务码为201代表创建成功"
// @Router       /api/v1/feed/recipes/generate-from-all-materials/{pig_type_id} [post]
func (c *RecipeController) GenerateFromAllMaterials(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "GenerateFromAllMaterials")
	const actionType = "使用系统中所有可用的原料一键生成配方"

	idStr := ctx.Param("pig_type_id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		logger.Errorf("%s: 猪类型ID格式错误: %v, ID: %s", actionType, err, idStr)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的猪类型ID格式", actionType, "猪类型ID格式错误", idStr)
	}

	recipe, err := c.recipeService.GenerateRecipeWithAllRawMaterials(reqCtx, uint32(id))
	if err != nil {
		logger.Errorf("%s: 服务层生成配方失败: %v, PigTypeID: %d", actionType, err, id)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "生成配方失败: "+err.Error(), actionType, "服务层生成配方失败", id)
	}

	resp := dto.ToGenerateRecipeResponse(recipe)
	logger.Infof("%s: 配方生成成功, 新配方ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeCreated, "配方生成成功", resp, actionType, "配方生成成功", resp)
}

// GenerateRecipeWithPrioritizedStockRawMaterials godoc
// @Summary      使用优先有库存原料的策略生成配方
// @Description  根据指定的猪类型ID，优先使用有库存的原料，自动计算并创建一个配方。
// @Tags         饲料管理-配方
// @Security     BearerAuth
// @Produce      json
// @Param        pig_type_id path int true "猪类型ID"
// @Success      201 {object} controller.Response{data=dto.GenerateRecipeResponse} "业务码为201代表创建成功"
// @Router       /api/v1/feed/recipes/generate-prioritized-stock/{pig_type_id} [post]
func (c *RecipeController) GenerateRecipeWithPrioritizedStockRawMaterials(ctx echo.Context) error {
	reqCtx, logger := logs.Trace(ctx.Request().Context(), c.ctx, "GenerateRecipeWithPrioritizedStockRawMaterials")
	const actionType = "生成优先使用库存原料的配方"

	idStr := ctx.Param("pig_type_id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		logger.Errorf("%s: 猪类型ID格式错误: %v, ID: %s", actionType, err, idStr)
		return controller.SendErrorWithAudit(ctx, controller.CodeBadRequest, "无效的猪类型ID格式", actionType, "猪类型ID格式错误", idStr)
	}

	recipe, err := c.recipeService.GenerateRecipeWithPrioritizedStockRawMaterials(reqCtx, uint32(id))
	if err != nil {
		logger.Errorf("%s: 服务层生成配方失败: %v, PigTypeID: %d", actionType, err, id)
		return controller.SendErrorWithAudit(ctx, controller.CodeInternalError, "生成配方失败: "+err.Error(), actionType, "服务层生成配方失败", id)
	}

	resp := dto.ToGenerateRecipeResponse(recipe)
	logger.Infof("%s: 配方生成成功, 新配方ID: %d", actionType, resp.ID)
	return controller.SendSuccessWithAudit(ctx, controller.CodeCreated, "配方生成成功", resp, actionType, "配方生成成功", resp)
}