package handler

import (
	"errors"
	"net/http"
	"strconv"

	"github.com/freefire/jiang13-bbs/service"
	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
)

// SitePagesList 已发布单页目录（全部页）
func (h *Handlers) SitePagesList(c *gin.Context) {
	list, err := h.SitePage.ListPublished()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取页面失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"pages": nonNilSlice(list)})
}

// SitePageDetail 公开单页详情（按 slug）
func (h *Handlers) SitePageDetail(c *gin.Context) {
	slug := c.Param("slug")
	p, err := h.SitePage.GetPublishedBySlug(slug)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			c.JSON(http.StatusNotFound, gin.H{"error": "页面不存在"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取页面失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"page": p})
}

// AdminListSitePages 后台单页列表
func (h *Handlers) AdminListSitePages(c *gin.Context) {
	list, err := h.SitePage.ListAll()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取页面失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"pages": nonNilSlice(list)})
}

// AdminCreateSitePage 新建单页
func (h *Handlers) AdminCreateSitePage(c *gin.Context) {
	var in service.SitePageInput
	if err := c.ShouldBindJSON(&in); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	p, err := h.SitePage.Create(&in)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusCreated, gin.H{"page": p})
}

// AdminUpdateSitePage 编辑单页
func (h *Handlers) AdminUpdateSitePage(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的页面 ID"})
		return
	}
	var in service.SitePageInput
	if err := c.ShouldBindJSON(&in); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	p, err := h.SitePage.Update(uint(id), &in)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			c.JSON(http.StatusNotFound, gin.H{"error": "页面不存在"})
			return
		}
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"page": p})
}

// AdminDeleteSitePage 删除单页
func (h *Handlers) AdminDeleteSitePage(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的页面 ID"})
		return
	}
	if err := h.SitePage.Delete(uint(id)); err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			c.JSON(http.StatusNotFound, gin.H{"error": "页面不存在"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "删除失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}