package handler

import (
	"strconv"

	"with_you/internal/dto"
	"with_you/internal/model"
	"with_you/internal/pkg/response"
	"with_you/internal/service"

	"github.com/gin-gonic/gin"
)

// AdminCommentHandler 管理端评论处理器
type AdminCommentHandler struct {
	adminCommentService service.AdminCommentService
}

// NewAdminCommentHandler 创建管理端评论处理器
func NewAdminCommentHandler(adminCommentService service.AdminCommentService) *AdminCommentHandler {
	return &AdminCommentHandler{
		adminCommentService: adminCommentService,
	}
}

// GetCommentList 获取评论列表
// GET /api/v1/admin/comments
func (h *AdminCommentHandler) GetCommentList(c *gin.Context) {
	// 解析分页参数
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))

	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 || pageSize > 100 {
		pageSize = 20
	}

	// 获取筛选参数
	keyword := c.Query("keyword")
	postID := c.Query("post_id")
	authorID := c.Query("author_id")
	status := c.Query("status")
	startDate := c.Query("start_date")
	endDate := c.Query("end_date")

	// 验证状态参数
	if status != "" && status != string(model.CommentStatusDraft) &&
		status != string(model.CommentStatusPending) &&
		status != string(model.CommentStatusPublished) &&
		status != string(model.CommentStatusRejected) &&
		status != string(model.CommentStatusDeleted) {
		response.BadRequest(c, "invalid status value")
		return
	}

	comments, total, err := h.adminCommentService.GetCommentList(c.Request.Context(), page, pageSize, keyword, postID, authorID, status, startDate, endDate)
	if err != nil {
		response.InternalServerError(c, "failed to get comment list")
		return
	}

	response.Paginated(c, comments, total, page, pageSize)
}

// GetCommentDetail 获取评论详情
// GET /api/v1/admin/comments/:id
func (h *AdminCommentHandler) GetCommentDetail(c *gin.Context) {
	commentID := c.Param("id")
	if commentID == "" {
		response.BadRequest(c, "comment id is required")
		return
	}

	commentDetail, err := h.adminCommentService.GetCommentDetail(c.Request.Context(), commentID)
	if err != nil {
		response.NotFound(c, "comment not found")
		return
	}

	response.Success(c, commentDetail)
}

// DeleteComment 删除评论
// DELETE /api/v1/admin/comments/:id
func (h *AdminCommentHandler) DeleteComment(c *gin.Context) {
	commentID := c.Param("id")
	if commentID == "" {
		response.BadRequest(c, "comment id is required")
		return
	}

	err := h.adminCommentService.DeleteComment(c.Request.Context(), commentID)
	if err != nil {
		response.HandleError(c, err, "failed to delete comment")
		return
	}

	response.Success(c, dto.SuccessResponse{
		Success: true,
		Message: "comment deleted successfully",
	})
}

// BatchDeleteComments 批量删除评论
// POST /api/v1/admin/comments/batch-delete
func (h *AdminCommentHandler) BatchDeleteComments(c *gin.Context) {
	var req dto.AdminBatchDeleteCommentsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "invalid request body: "+err.Error())
		return
	}

	result, err := h.adminCommentService.BatchDeleteComments(c.Request.Context(), req.IDs)
	if err != nil {
		response.InternalServerError(c, "failed to batch delete comments")
		return
	}

	response.Success(c, result)
}

func (h *AdminCommentHandler) ModerateComment(c *gin.Context) {
	commentID := c.Param("id")
	if commentID == "" {
		response.BadRequest(c, "comment id is required")
		return
	}

	var req dto.AdminModerateCommentRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "invalid request body: "+err.Error())
		return
	}

	if req.Status != string(model.CommentStatusPublished) && req.Status != string(model.CommentStatusRejected) {
		response.BadRequest(c, "invalid status value, must be 'published' or 'rejected'")
		return
	}

	reviewedBy := c.GetString("user_id")

	commentDetail, err := h.adminCommentService.ModerateComment(c.Request.Context(), commentID, model.CommentStatus(req.Status), req.Reason, reviewedBy)
	if err != nil {
		response.HandleError(c, err, "failed to moderate comment")
		return
	}

	response.Success(c, commentDetail)
}

func (h *AdminCommentHandler) BatchModerateComments(c *gin.Context) {
	var req dto.AdminBatchModerateCommentsRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "invalid request body: "+err.Error())
		return
	}

	if req.Status != string(model.CommentStatusPublished) && req.Status != string(model.CommentStatusRejected) {
		response.BadRequest(c, "invalid status value, must be 'published' or 'rejected'")
		return
	}

	reviewedBy := c.GetString("user_id")

	result, err := h.adminCommentService.BatchModerateComments(c.Request.Context(), req.IDs, model.CommentStatus(req.Status), reviewedBy)
	if err != nil {
		response.InternalServerError(c, "failed to batch moderate comments")
		return
	}

	response.Success(c, result)
}

// GetPostComments 获取帖子的评论列表
// GET /api/v1/admin/posts/:postId/comments
func (h *AdminCommentHandler) GetPostComments(c *gin.Context) {
	postID := c.Param("postId")
	if postID == "" {
		response.BadRequest(c, "post id is required")
		return
	}

	// 解析分页参数
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))

	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 || pageSize > 100 {
		pageSize = 20
	}

	comments, total, err := h.adminCommentService.GetCommentsByPostID(c.Request.Context(), postID, page, pageSize)
	if err != nil {
		response.InternalServerError(c, "failed to get post comments")
		return
	}

	response.Paginated(c, comments, total, page, pageSize)
}