package handlers

import (
	"strconv"
	"strings"

	"hyapi-server/internal/application/user"
	"hyapi-server/internal/application/user/dto/commands"
	"hyapi-server/internal/application/user/dto/queries"
	securityServices "hyapi-server/internal/domains/security/services"
	"hyapi-server/internal/shared/interfaces"

	"github.com/gin-gonic/gin"
	"go.uber.org/zap"
)

// AdminBlacklistHandler 管理端黑名单
type AdminBlacklistHandler struct {
	userApp   user.UserApplicationService
	blacklist *securityServices.BlacklistService
	response  interfaces.ResponseBuilder
	logger    *zap.Logger
}

func NewAdminBlacklistHandler(
	userApp user.UserApplicationService,
	blacklist *securityServices.BlacklistService,
	response interfaces.ResponseBuilder,
	logger *zap.Logger,
) *AdminBlacklistHandler {
	return &AdminBlacklistHandler{
		userApp:   userApp,
		blacklist: blacklist,
		response:  response,
		logger:    logger,
	}
}

func (h *AdminBlacklistHandler) operatorID(c *gin.Context) string {
	if v, ok := c.Get("user_id"); ok {
		if id, ok := v.(string); ok {
			return id
		}
	}
	return ""
}

func (h *AdminBlacklistHandler) pageParams(c *gin.Context) (int, int) {
	page, pageSize := 1, 20
	if v := c.Query("page"); v != "" {
		if n, err := strconv.Atoi(v); err == nil && n > 0 {
			page = n
		}
	}
	if v := c.Query("page_size"); v != "" {
		if n, err := strconv.Atoi(v); err == nil && n > 0 && n <= 100 {
			pageSize = n
		}
	}
	return page, pageSize
}

// ListUsers 用户黑名单列表
func (h *AdminBlacklistHandler) ListUsers(c *gin.Context) {
	page, pageSize := h.pageParams(c)
	flag := true
	q := &queries.ListUsersQuery{
		Page:          page,
		PageSize:      pageSize,
		Phone:         c.Query("phone"),
		IsBlacklisted: &flag,
	}
	resp, err := h.userApp.ListUsers(c.Request.Context(), q)
	if err != nil {
		h.logger.Error("查询用户黑名单失败", zap.Error(err))
		h.response.BadRequest(c, "查询失败")
		return
	}
	h.response.Success(c, resp, "ok")
}

// AddUser 按手机号或用户ID加入黑名单
func (h *AdminBlacklistHandler) AddUser(c *gin.Context) {
	op := h.operatorID(c)
	if op == "" {
		h.response.Unauthorized(c, "未登录")
		return
	}
	var body struct {
		UserID string `json:"user_id"`
		Phone  string `json:"phone"`
		Reason string `json:"reason" binding:"required"`
		Source string `json:"source"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		h.response.BadRequest(c, "请填写纳入原因")
		return
	}

	userID := strings.TrimSpace(body.UserID)
	if userID == "" {
		phone := strings.TrimSpace(body.Phone)
		if phone == "" {
			h.response.BadRequest(c, "请提供用户ID或手机号")
			return
		}
		list, err := h.userApp.ListUsers(c.Request.Context(), &queries.ListUsersQuery{
			Page:     1,
			PageSize: 50,
			Phone:    phone,
		})
		if err != nil || list == nil || len(list.Items) == 0 {
			h.response.BadRequest(c, "未找到该手机号用户")
			return
		}
		for _, item := range list.Items {
			if item.Phone == phone {
				userID = item.ID
				break
			}
		}
		if userID == "" {
			userID = list.Items[0].ID
		}
	}

	cmd := &commands.BlacklistUserCommand{
		UserID:         userID,
		OperatorUserID: op,
		Reason:         body.Reason,
		Source:         body.Source,
	}
	if err := h.userApp.BlacklistUser(c.Request.Context(), cmd); err != nil {
		h.response.BadRequest(c, err.Error())
		return
	}
	h.response.Success(c, gin.H{"user_id": userID}, "已列入用户黑名单")
}

// RemoveUser 移出用户黑名单
func (h *AdminBlacklistHandler) RemoveUser(c *gin.Context) {
	op := h.operatorID(c)
	userID := c.Param("user_id")
	if userID == "" {
		h.response.BadRequest(c, "用户ID不能为空")
		return
	}
	if err := h.userApp.UnblacklistUser(c.Request.Context(), &commands.UnblacklistUserCommand{
		UserID:         userID,
		OperatorUserID: op,
	}); err != nil {
		h.response.BadRequest(c, err.Error())
		return
	}
	h.response.Success(c, nil, "已移出用户黑名单")
}

// ListIPs IP 黑名单
func (h *AdminBlacklistHandler) ListIPs(c *gin.Context) {
	page, pageSize := h.pageParams(c)
	list, total, err := h.blacklist.ListIP(c.Request.Context(), page, pageSize, c.Query("keyword"))
	if err != nil {
		h.response.BadRequest(c, "查询失败")
		return
	}
	h.response.Success(c, gin.H{
		"items": list,
		"total": total,
		"page":  page,
		"size":  pageSize,
	}, "ok")
}

// AddIP 添加 IP 黑名单
func (h *AdminBlacklistHandler) AddIP(c *gin.Context) {
	op := h.operatorID(c)
	var body struct {
		IP     string `json:"ip" binding:"required"`
		Reason string `json:"reason" binding:"required"`
		Source string `json:"source"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		h.response.BadRequest(c, "请填写IP和原因")
		return
	}
	entry, err := h.blacklist.AddIP(c.Request.Context(), body.IP, body.Reason, body.Source, op)
	if err != nil {
		h.response.BadRequest(c, err.Error())
		return
	}
	h.response.Success(c, entry, "已加入IP黑名单")
}

// RemoveIP 移除 IP 黑名单
func (h *AdminBlacklistHandler) RemoveIP(c *gin.Context) {
	idStr := c.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 64)
	if err != nil {
		h.response.BadRequest(c, "无效ID")
		return
	}
	if err := h.blacklist.RemoveIP(c.Request.Context(), id); err != nil {
		h.response.BadRequest(c, err.Error())
		return
	}
	h.response.Success(c, nil, "已移除IP黑名单")
}

// ListHits 拦截记录
func (h *AdminBlacklistHandler) ListHits(c *gin.Context) {
	page, pageSize := h.pageParams(c)
	list, total, err := h.blacklist.ListHits(c.Request.Context(), page, pageSize, c.Query("hit_type"), c.Query("keyword"))
	if err != nil {
		h.response.BadRequest(c, "查询失败")
		return
	}
	h.response.Success(c, gin.H{
		"items": list,
		"total": total,
		"page":  page,
		"size":  pageSize,
	}, "ok")
}