package handler

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

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

// GET /api/sidebar 公开侧栏载荷（布局 + 启用中的自定义工具）
func (h *Handlers) GetSidebar(c *gin.Context) {
	payload, err := h.Sidebar.PublicPayload()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取侧栏配置失败"})
		return
	}
	c.JSON(http.StatusOK, payload)
}

// GET /api/admin/sidebar 管理端全量（生效配置 + 全部工具）
func (h *Handlers) AdminGetSidebar(c *gin.Context) {
	cfg, err := h.Sidebar.GetConfig()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取侧栏配置失败"})
		return
	}
	widgets, err := h.Sidebar.ListWidgets()
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取侧栏工具失败"})
		return
	}
	if widgets == nil {
		widgets = []model.SidebarWidget{}
	}
	c.JSON(http.StatusOK, gin.H{"config": cfg, "widgets": widgets})
}

// PUT /api/admin/sidebar/config 保存布局配置
func (h *Handlers) AdminSaveSidebarConfig(c *gin.Context) {
	var req struct {
		Config *service.SidebarConfig `json:"config"`
	}
	if err := c.ShouldBindJSON(&req); err != nil || req.Config == nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	saved, err := h.Sidebar.SaveConfig(*req.Config)
	if err != nil {
		if errors.Is(err, service.ErrSidebarInvalid) {
			c.JSON(http.StatusBadRequest, gin.H{"error": "侧栏布局配置无效"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "保存侧栏配置失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"config": saved})
}

// POST /api/admin/sidebar/widgets 新建自定义工具
func (h *Handlers) AdminCreateSidebarWidget(c *gin.Context) {
	var w model.SidebarWidget
	if err := c.ShouldBindJSON(&w); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	if err := h.Sidebar.CreateWidget(&w); err != nil {
		if errors.Is(err, service.ErrSidebarInvalid) {
			c.JSON(http.StatusBadRequest, gin.H{"error": "工具名称或代码长度无效"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "创建侧栏工具失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"widget": w})
}

// PUT /api/admin/sidebar/widgets/:id 更新工具（内容 + 启用态）
func (h *Handlers) AdminUpdateSidebarWidget(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	var body model.SidebarWidget
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	if err := h.Sidebar.UpdateWidget(uint(id), &body); err != nil {
		if errors.Is(err, service.ErrSidebarWidgetNotFound) {
			c.JSON(http.StatusNotFound, gin.H{"error": "侧栏工具不存在"})
			return
		}
		if errors.Is(err, service.ErrSidebarInvalid) {
			c.JSON(http.StatusBadRequest, gin.H{"error": "工具名称或代码长度无效"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "更新侧栏工具失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}

// DELETE /api/admin/sidebar/widgets/:id 删除工具并清理布局引用
func (h *Handlers) AdminDeleteSidebarWidget(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数无效"})
		return
	}
	if err := h.Sidebar.DeleteWidget(uint(id)); err != nil {
		if errors.Is(err, service.ErrSidebarWidgetNotFound) {
			c.JSON(http.StatusNotFound, gin.H{"error": "侧栏工具不存在"})
			return
		}
		c.JSON(http.StatusInternalServerError, gin.H{"error": "删除侧栏工具失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"ok": true})
}