package handler

import (
	"net/http"
	"strconv"

	"github.com/gin-gonic/gin"
	"github.com/gouki/lunar-server/internal/model"
	"github.com/gouki/lunar-server/internal/service"
)

// GetWishTree 获取许愿树
func GetWishTree(c *gin.Context) {
	treeID, _ := strconv.Atoi(c.DefaultQuery("treeId", "1"))

	wishService := service.NewWishService()
	tree, wishes, err := wishService.GetWishTreeWithWishes(uint(treeID))
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  "获取许愿树失败",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": gin.H{
			"tree":   tree,
			"wishes": wishes,
		},
	})
}

// CreateWish 创建许愿
func CreateWish(c *gin.Context) {
	userID, exists := c.Get("userID")
	if !exists {
		c.JSON(http.StatusUnauthorized, gin.H{
			"code": 401,
			"msg":  "未授权",
		})
		return
	}

	var req struct {
		TreeID  uint   `json:"treeId" binding:"required"`
		Content string `json:"content" binding:"required"`
		Type    string `json:"type" binding:"required"` // free:免费 paid:付费
	}

	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "参数错误",
		})
		return
	}

	// 检查内容长度
	maxLength := 20
	if req.Type == "paid" {
		maxLength = 100
	}
	if len(req.Content) > maxLength {
		c.JSON(http.StatusBadRequest, gin.H{
			"code": 400,
			"msg":  "内容长度超过限制",
		})
		return
	}

	wishService := service.NewWishService()
	wish := &model.Wish{
		UserID:  userID.(uint),
		TreeID:  req.TreeID,
		Content: req.Content,
		Type:    req.Type,
		Status:  1,
	}

	if err := wishService.CreateWish(wish); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  err.Error(),
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": wish,
	})
}

// GetWishList 获取许愿列表
func GetWishList(c *gin.Context) {
	treeID, _ := strconv.Atoi(c.DefaultQuery("treeId", "1"))
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "20"))

	wishService := service.NewWishService()
	wishes, total, err := wishService.GetWishList(uint(treeID), page, pageSize)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  "获取许愿列表失败",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": gin.H{
			"list":  wishes,
			"total": total,
			"page":  page,
		},
	})
}

// GetWishDetail 获取许愿详情
func GetWishDetail(c *gin.Context) {
	id := c.Param("id")
	wishID, _ := strconv.Atoi(id)

	wishService := service.NewWishService()
	wish, err := wishService.GetWishByID(uint(wishID))
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{
			"code": 404,
			"msg":  "许愿不存在",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": wish,
	})
}

// DeleteWish 删除许愿
func DeleteWish(c *gin.Context) {
	userID, exists := c.Get("userID")
	if !exists {
		c.JSON(http.StatusUnauthorized, gin.H{
			"code": 401,
			"msg":  "未授权",
		})
		return
	}

	id := c.Param("id")
	wishID, _ := strconv.Atoi(id)

	// 检查是否是本人的许愿
	wishService := service.NewWishService()
	wish, err := wishService.GetWishByID(uint(wishID))
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{
			"code": 404,
			"msg":  "许愿不存在",
		})
		return
	}

	if wish.UserID != userID.(uint) {
		c.JSON(http.StatusForbidden, gin.H{
			"code": 403,
			"msg":  "无权删除",
		})
		return
	}

	if err := wishService.DeleteWish(uint(wishID)); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  "删除失败",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
	})
}

// GetWishProducts 获取许愿商品列表
func GetWishProducts(c *gin.Context) {
	wishService := service.NewWishService()
	products, err := wishService.GetWishProducts()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{
			"code": 500,
			"msg":  "获取商品列表失败",
		})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"code": 0,
		"msg":  "success",
		"data": gin.H{
			"list": products,
		},
	})
}