package handler

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

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

// ===== 内容审核队列（RequireStaff 基础鉴权，板块范围由 service 按 Actor 隔离） =====

// AdminPendingPosts 待审核帖子分页
func (h *Handlers) AdminPendingPosts(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	posts, total, err := h.Moderation.PendingPosts(middleware.CurrentActor(c), page, 15)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取待审帖子失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"posts": nonNilSlice(posts), "total": total, "page": page})
}

// AdminPendingComments 待审核评论分页
func (h *Handlers) AdminPendingComments(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	comments, total, err := h.Moderation.PendingComments(middleware.CurrentActor(c), page, 15)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "获取待审评论失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"comments": nonNilSlice(comments), "total": total, "page": page})
}

// AdminPendingCounts 当前操作者可见的待审数量（导航角标）
func (h *Handlers) AdminPendingCounts(c *gin.Context) {
	posts, comments := h.Moderation.PendingCounts(middleware.CurrentActor(c))
	c.JSON(http.StatusOK, gin.H{"posts": posts, "comments": comments})
}

// AdminApprovePost 通过帖子
func (h *Handlers) AdminApprovePost(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的 ID"})
		return
	}
	actor := middleware.CurrentActor(c)
	boardID, err := h.Moderation.ApprovePost(actor, uint(id))
	if err != nil {
		h.writeModerationError(c, err)
		return
	}
	h.broadcastFeedChanged("post", uint(id), boardID, actor.ID)
	h.broadcastModerationChanged()
	c.JSON(http.StatusOK, gin.H{"message": "操作成功"})
}

// AdminRejectPost 拒绝帖子
func (h *Handlers) AdminRejectPost(c *gin.Context) {
	h.execModeration(c, h.Moderation.RejectPost)
}

// AdminApproveComment 通过评论
func (h *Handlers) AdminApproveComment(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的 ID"})
		return
	}
	actor := middleware.CurrentActor(c)
	postID, boardID, err := h.Moderation.ApproveComment(actor, uint(id))
	if err != nil {
		h.writeModerationError(c, err)
		return
	}
	h.broadcastFeedChanged("comment", postID, boardID, actor.ID)
	h.broadcastModerationChanged()
	c.JSON(http.StatusOK, gin.H{"message": "操作成功"})
}

// AdminRejectComment 拒绝评论
func (h *Handlers) AdminRejectComment(c *gin.Context) {
	h.execModeration(c, h.Moderation.RejectComment)
}

// writeModerationError 映射审核业务错误为 HTTP 响应
func (h *Handlers) writeModerationError(c *gin.Context, err error) {
	switch {
	case errors.Is(err, gorm.ErrRecordNotFound):
		c.JSON(http.StatusNotFound, gin.H{"error": "内容不存在"})
	case errors.Is(err, service.ErrModerationForbidden):
		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
	case errors.Is(err, service.ErrNotPending):
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
	default:
		c.JSON(http.StatusInternalServerError, gin.H{"error": "操作失败"})
	}
}

// execModeration 统一解析 :id 并映射审核业务错误（拒绝等无额外副作用的操作）
func (h *Handlers) execModeration(c *gin.Context, fn func(*service.Actor, uint) error) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil || id == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的 ID"})
		return
	}
	if err := fn(middleware.CurrentActor(c), uint(id)); err != nil {
		h.writeModerationError(c, err)
		return
	}
	h.broadcastModerationChanged()
	c.JSON(http.StatusOK, gin.H{"message": "操作成功"})
}