package handlers

import (
	"strconv"
	"strings"
	"time"
	securityEntities "tyapi-server/internal/domains/security/entities"
	"tyapi-server/internal/shared/interfaces"
	"tyapi-server/internal/shared/ipgeo"

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

// AdminSecurityHandler 管理员安全数据处理器
type AdminSecurityHandler struct {
	db              *gorm.DB
	responseBuilder interfaces.ResponseBuilder
	logger          *zap.Logger
	ipLocator       *ipgeo.Locator
}

func NewAdminSecurityHandler(
	db *gorm.DB,
	responseBuilder interfaces.ResponseBuilder,
	logger *zap.Logger,
	ipLocator *ipgeo.Locator,
) *AdminSecurityHandler {
	return &AdminSecurityHandler{
		db:              db,
		responseBuilder: responseBuilder,
		logger:          logger,
		ipLocator:       ipLocator,
	}
}

func (h *AdminSecurityHandler) getIntQuery(c *gin.Context, key string, defaultValue int) int {
	if value := c.Query(key); value != "" {
		if intValue, err := strconv.Atoi(value); err == nil && intValue > 0 {
			return intValue
		}
	}
	return defaultValue
}

func (h *AdminSecurityHandler) parseRange(c *gin.Context) (time.Time, time.Time, bool) {
	startTime := time.Now().Add(-24 * time.Hour)
	endTime := time.Now()

	if start := strings.TrimSpace(c.Query("start_time")); start != "" {
		t, err := time.Parse("2006-01-02 15:04:05", start)
		if err != nil {
			h.responseBuilder.BadRequest(c, "start_time格式错误，示例：2026-03-19 10:00:00")
			return time.Time{}, time.Time{}, false
		}
		startTime = t
	}
	if end := strings.TrimSpace(c.Query("end_time")); end != "" {
		t, err := time.Parse("2006-01-02 15:04:05", end)
		if err != nil {
			h.responseBuilder.BadRequest(c, "end_time格式错误，示例：2026-03-19 12:00:00")
			return time.Time{}, time.Time{}, false
		}
		endTime = t
	}
	return startTime, endTime, true
}

// ListSuspiciousIPs 获取可疑IP列表
func (h *AdminSecurityHandler) ListSuspiciousIPs(c *gin.Context) {
	page := h.getIntQuery(c, "page", 1)
	pageSize := h.getIntQuery(c, "page_size", 20)
	if pageSize > 100 {
		pageSize = 100
	}
	startTime, endTime, ok := h.parseRange(c)
	if !ok {
		return
	}

	ip := strings.TrimSpace(c.Query("ip"))
	path := strings.TrimSpace(c.Query("path"))

	query := h.db.Model(&securityEntities.SuspiciousIPRecord{}).
		Where("created_at >= ? AND created_at <= ?", startTime, endTime)
	if ip != "" {
		query = query.Where("ip = ?", ip)
	}
	if path != "" {
		query = query.Where("path LIKE ?", "%"+path+"%")
	}

	var total int64
	if err := query.Count(&total).Error; err != nil {
		h.logger.Error("查询可疑IP总数失败", zap.Error(err))
		h.responseBuilder.InternalError(c, "查询失败")
		return
	}

	var items []securityEntities.SuspiciousIPRecord
	if err := query.Order("created_at DESC").Offset((page - 1) * pageSize).Limit(pageSize).Find(&items).Error; err != nil {
		h.logger.Error("查询可疑IP列表失败", zap.Error(err))
		h.responseBuilder.InternalError(c, "查询失败")
		return
	}

	h.responseBuilder.Success(c, gin.H{
		"items": items,
		"total": total,
	}, "获取成功")
}

type geoStreamRow struct {
	IP    string `json:"ip"`
	Path  string `json:"path"`
	Count int    `json:"count"`
}

// GetSuspiciousIPGeoStream 获取地球请求流数据
func (h *AdminSecurityHandler) GetSuspiciousIPGeoStream(c *gin.Context) {
	startTime, endTime, ok := h.parseRange(c)
	if !ok {
		return
	}
	topN := h.getIntQuery(c, "top_n", 200)
	if topN > 1000 {
		topN = 1000
	}

	var rows []geoStreamRow
	err := h.db.Model(&securityEntities.SuspiciousIPRecord{}).
		Select("ip, path, COUNT(1) as count").
		Where("created_at >= ? AND created_at <= ?", startTime, endTime).
		Group("ip, path").
		Order("count DESC").
		Limit(topN).
		Scan(&rows).Error
	if err != nil {
		h.logger.Error("查询地球请求流失败", zap.Error(err))
		h.responseBuilder.InternalError(c, "查询失败")
		return
	}

	// 目标固定服务器点位（上海）
	const serverName = "TYAPI-Server"
	const serverLng = 121.4737
	const serverLat = 31.2304

	result := make([]gin.H, 0, len(rows))
	for _, row := range rows {
		record := securityEntities.SuspiciousIPRecord{IP: row.IP}
		fromName, fromLng, fromLat := h.ipLocator.ToGeoPoint(record)
		result = append(result, gin.H{
			"from_name": fromName,
			"from_lng":  fromLng,
			"from_lat":  fromLat,
			"to_name":   serverName,
			"to_lng":    serverLng,
			"to_lat":    serverLat,
			"value":     row.Count,
			"path":      row.Path,
			"ip":        row.IP,
		})
	}

	h.responseBuilder.Success(c, result, "获取成功")
}