package api

import (
	"errors"
	"fmt"
	"net/http"

	"github.com/LoveLosita/smartflow/backend/model"
	"github.com/LoveLosita/smartflow/backend/respond"
	"github.com/LoveLosita/smartflow/backend/service"
	"github.com/gin-gonic/gin"
)

type TaskHandler struct {
	// 伸出手：准备接住 Service
	svc *service.TaskService
}

// NewTaskHandler 创建 TaskHandler 实例
func NewTaskHandler(svc *service.TaskService) *TaskHandler {
	return &TaskHandler{
		svc: svc,
	}
}

func (th *TaskHandler) AddTask(c *gin.Context) {
	//1. 绑定请求参数
	var req model.UserAddTaskRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, respond.WrongParamType)
		fmt.Println(err)
		return
	}
	// 用户ID从上下文中获取
	userID := c.GetInt("user_id")
	//2. 调用 Service 层处理业务逻辑
	resp, err := th.svc.AddTask(&req, userID)
	if err != nil {
		switch {
		case errors.Is(err, respond.InvalidPriority): //如果是无效刷新令牌或者无效claims或者无效签名方法
			c.JSON(http.StatusBadRequest, err)
			return
		default:
			c.JSON(http.StatusInternalServerError, respond.InternalError(err))
		}
	}
	//3. 返回响应
	c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, resp))
}

func (th *TaskHandler) GetUserTasks(c *gin.Context) {
	// 用户ID从上下文中获取
	userID := c.GetInt("user_id")
	//2. 调用 Service 层处理业务逻辑
	resp, err := th.svc.GetUserTasks(userID)
	if err != nil {
		switch {
		case errors.Is(err, respond.UserTasksEmpty): //如果任务列表为空
			c.JSON(http.StatusOK, respond.RespWithData(respond.UserTasksEmpty, []model.Task{})) //确实没错误，但是任务列表为空，返回自定义响应
			return
		default:
			c.JSON(http.StatusInternalServerError, respond.InternalError(err))
			return
		}
	}
	//3. 返回响应
	c.JSON(http.StatusOK, respond.RespWithData(respond.Ok, resp))
}