package task

import (
	"net/http"
	"time"

	"task-track-backend/model"
	"task-track-backend/pkg/database"

	"github.com/gin-gonic/gin"
)

// CreateTaskRequest 创建任务请求结构
type CreateTaskRequest struct {
	Title          string     `json:"title" binding:"required"`
	Description    string     `json:"description"`
	Type           string     `json:"type"`
	Priority       string     `json:"priority"`
	AssigneeID     *uint      `json:"assignee_id"`
	StartTime      *time.Time `json:"start_time"`
	EndTime        *time.Time `json:"end_time"`
	OrganizationID uint       `json:"organization_id" binding:"required"`
	CreatorID      uint       `json:"creator_id" binding:"required"`
}

func (h *TaskHandler) CreateTask(c *gin.Context) {
	var req CreateTaskRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "请求参数错误: " + err.Error(),
		})
		return
	}

	// 验证优先级
	if req.Priority != "" && req.Priority != "urgent" && req.Priority != "high" && req.Priority != "medium" && req.Priority != "low" {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "优先级值无效，必须是 urgent、high、medium 或 low",
		})
		return
	}

	// 如果没有指定优先级，默认为 medium
	if req.Priority == "" {
		req.Priority = "medium"
	}

	// 验证时间逻辑
	if req.StartTime != nil && req.EndTime != nil && req.StartTime.After(*req.EndTime) {
		c.JSON(http.StatusBadRequest, gin.H{
			"code":    400,
			"message": "开始时间不能晚于结束时间",
		})
		return
	}

	// 创建任务对象
	task := model.Task{
		Title:          req.Title,
		Description:    req.Description,
		Type:           req.Type,
		Priority:       req.Priority,
		Status:         "pending", // 默认状态
		CreatorID:      req.CreatorID,
		OrganizationID: req.OrganizationID,
		StartTime:      req.StartTime,
		EndTime:        req.EndTime,
	}

	// 如果指定了执行者
	if req.AssigneeID != nil {
		task.AssigneeID = *req.AssigneeID
	}

	// 保存到数据库
	db := database.GetDB()
	if err := db.Create(&task).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code":    500,
			"message": "创建任务失败: " + err.Error(),
		})
		return
	}

	// 返回成功响应
	c.JSON(http.StatusCreated, gin.H{
		"code":    201,
		"message": "任务创建成功",
		"data": gin.H{
			"id":              task.ID,
			"title":           task.Title,
			"description":     task.Description,
			"type":            task.Type,
			"priority":        task.Priority,
			"status":          task.Status,
			"creator_id":      task.CreatorID,
			"assignee_id":     task.AssigneeID,
			"organization_id": task.OrganizationID,
			"start_time":      task.StartTime,
			"end_time":        task.EndTime,
			"created_at":      task.CreatedAt,
			"updated_at":      task.UpdatedAt,
		},
	})
}