package handlers

import (
	"github.com/gin-gonic/gin"
	"net/http"
	"strconv"
	"wqyblog_api_go/db"
	"wqyblog_api_go/models"
)

func GetPosts(c *gin.Context) {
	// 获取查询参数
	pageStr := c.DefaultQuery("page", "1")
	limitStr := c.DefaultQuery("limit", "10")

	// 将查询参数转换为整数
	page, err := strconv.Atoi(pageStr)
	if err != nil || page < 1 {
		page = 1
	}

	limit, err := strconv.Atoi(limitStr)
	if err != nil || limit < 1 {
		limit = 10
	}

	// 计算偏移量
	offset := (page - 1) * limit

	var posts []models.Post

	// 按照创建时间降序排序获取帖子
	db.DB.Order("created_at desc").Limit(limit).Offset(offset).Find(&posts)

	// 返回分页结果
	c.JSON(http.StatusOK, gin.H{
		"page":  page,
		"limit": limit,
		"data":  posts,
	})
}

func GetPost(c *gin.Context) {
	id := c.Param("id")
	var post models.Post
	if err := db.DB.First(&post, id).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Post not found"})
		return
	}
	c.JSON(http.StatusOK, post)
}

func CreatePost(c *gin.Context) {
	var input models.Post
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	post := models.Post{Title: input.Title, Content: input.Content}
	db.DB.Create(&post)
	c.JSON(http.StatusOK, post)
}

func UpdatePost(c *gin.Context) {
	id := c.Param("id")
	var post models.Post
	if err := db.DB.First(&post, id).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Post not found"})
		return
	}

	var input models.Post
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	db.DB.Model(&post).Updates(models.Post{Title: input.Title, Content: input.Content})
	c.JSON(http.StatusOK, post)
}

func DeletePost(c *gin.Context) {
	id := c.Param("id")
	var post models.Post
	if err := db.DB.First(&post, id).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "Post not found"})
		return
	}

	db.DB.Delete(&post)
	c.JSON(http.StatusOK, gin.H{"message": "Post deleted successfully"})
}