package handler

import (
	"net/http"
	"strconv"

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

// UpdateProfileRequest 更新资料请求（头像不在此通道，见 /api/upload/avatar）
type UpdateProfileRequest struct {
	Nickname  string `json:"nickname"`
	Email     string `json:"email"`
	Signature string `json:"signature"`
}

// UpdateProfile 更新当前登录用户的资料（昵称、邮箱、签名）
func (h *Handlers) UpdateProfile(c *gin.Context) {
	claims := middleware.CurrentUser(c)
	var req UpdateProfileRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "请求参数格式错误"})
		return
	}

	user, err := h.Auth.UpdateProfile(claims.ID, req.Nickname, req.Email, req.Signature)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// 返回更新后的完整资料（含 email/signature，供前端刷新展示）
	c.JSON(http.StatusOK, gin.H{
		"user": gin.H{
			"id":        user.ID,
			"username":  user.Username,
			"nickname":  user.Nickname,
			"avatar":    user.Avatar,
			"signature": user.Signature,
			"email":     user.Email,
			"role":      user.Role,
		},
	})
}

// UserProfile 获取用户资料：基本信息 + 统计 + 发帖列表（分页）
func (h *Handlers) UserProfile(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的用户 ID"})
		return
	}

	user, err := h.Auth.GetUserByID(uint(id))
	if err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "用户不存在"})
		return
	}

	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))

	var viewerID uint
	var actor *service.Actor
	if claims := middleware.CurrentUser(c); claims != nil {
		viewerID = claims.ID
		if a, err := h.Auth.LoadActor(claims.ID); err == nil {
			actor = a
		}
	}

	posts, postsTotal, err := h.Post.ListByUser(user.ID, viewerID, actor, page, size)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	// 填充点赞状态（仅登录用户）
	if viewerID > 0 {
		ids := make([]uint, 0, len(posts))
		for _, p := range posts {
			ids = append(ids, p.ID)
		}
		likedMap := h.Like.BatchHasLiked(ids, viewerID)
		for i := range posts {
			posts[i].Liked = likedMap[posts[i].ID]
		}
	}

	postCount, _ := h.Post.CountByUser(user.ID)
	commentCount, _ := h.Comment.CountByUser(user.ID)

	// 签到积分概览（失败不阻塞资料返回）
	pointsTotal, streak := 0, 0
	if cs, err := h.Checkin.Status(user.ID); err == nil && cs != nil {
		pointsTotal = cs.TotalPoints
		streak = cs.Streak
	}

	// 板块管理员公开其授权板块（角色徽章展示"板块管理员 · 板块名"）
	var boardIDs []uint
	if user.Role == model.RoleBoardAdmin {
		boardIDs, _ = h.Auth.GetUserBoardIDs(user.ID)
	}
	if boardIDs == nil {
		boardIDs = []uint{}
	}

	userPayload := gin.H{
		"id":           user.ID,
		"username":     user.Username,
		"nickname":     user.Nickname,
		"avatar":       user.Avatar,
		"signature":    user.Signature,
		"role":         user.Role,
		"board_ids":    boardIDs,
		"created_at":   user.CreatedAt,
		"level":        user.Level,
		"total_points": user.TotalPoints,
	}
	// 仅对具备用户管理权限的访客下发封禁态（避免信息公开）
	if actor != nil && actor.HasPerm(service.PermUsers) {
		userPayload["banned"] = user.Banned
	}
	// 徽章墙（失败不阻塞资料返回）
	if h.Badge != nil {
		if badges, err := h.Badge.ForUser(user.ID); err == nil && badges != nil {
			userPayload["badges"] = badges
		}
	}

	c.JSON(http.StatusOK, gin.H{
		"user": userPayload,
		"stats": gin.H{
			"post_count":    postCount,
			"comment_count": commentCount,
			"points":        pointsTotal,
			"streak":        streak,
		},
		"posts":       nonNilSlice(posts),
		"posts_total": postsTotal,
		"page":        page,
		"size":        size,
	})
}

// UserComments 获取用户发表的评论列表（分页，含帖子标题）
func (h *Handlers) UserComments(c *gin.Context) {
	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的用户 ID"})
		return
	}
	// 校验用户存在
	if _, err := h.Auth.GetUserByID(uint(id)); err != nil {
		c.JSON(http.StatusNotFound, gin.H{"error": "用户不存在"})
		return
	}

	if allow, err := h.Setting.AllowComments(); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "评论暂时不可用"})
		return
	} else if !allow {
		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
		size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
		c.JSON(http.StatusOK, gin.H{
			"comments": []any{},
			"total":    0,
			"page":     page,
			"size":     size,
		})
		return
	}
	if requireLogin, err := h.Setting.CommentsRequireLogin(); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "评论暂时不可用"})
		return
	} else if requireLogin && middleware.CurrentUser(c) == nil {
		page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
		size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
		c.JSON(http.StatusOK, gin.H{
			"comments":      []any{},
			"total":         0,
			"page":          page,
			"size":          size,
			"require_login": true,
		})
		return
	}

	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))

	comments, total, err := h.Comment.ListByUser(uint(id), page, size)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"comments": nonNilSlice(comments),
		"total":    total,
		"page":     page,
		"size":     size,
	})
}