package service

import (
	"context"
	"customer-server/consts/account"
	"customer-server/dao"
	"customer-server/model/dto"
	"customer-server/model/entity"
	"errors"
	"net/http"

	"gitea.com/red-future/common/jaeger"
	"github.com/gogf/gf/v2/container/gmap"
	"github.com/gogf/gf/v2/encoding/gjson"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/net/ghttp"
	"github.com/gogf/gf/v2/os/glog"
	"github.com/gogf/gf/v2/os/gtime"
	"github.com/gogf/gf/v2/util/gconv"
	"github.com/gorilla/websocket"
)

// AccountWebSocket 全局单例
var AccountWebSocket = &accountWebsocketService{
	connections: gmap.NewStrAnyMap(true),
	upgrader: websocket.Upgrader{
		CheckOrigin: func(r *http.Request) bool {
			return true // 允许跨域
		},
	},
}

type accountWebsocketService struct {
	connections *gmap.StrAnyMap
	upgrader    websocket.Upgrader
}

// key: userId_platform
// accountWsConnection WebSocket 连接信息
type accountWsConnection struct {
	UserId      string
	Platform    account.Platform
	TenantId    uint64
	AccountName string // 客服账号ID
	Conn        *websocket.Conn
	CreatedAt   int64
}

// Connect 建立 WebSocket 连接
func (s *accountWebsocketService) Connect(ctx context.Context, r *ghttp.Request, accountName string, platform account.Platform) error {
	// 使用原生upgrader升级WebSocket连接
	ws, err := s.upgrader.Upgrade(r.Response.Writer, r.Request, nil)
	if err != nil {
		jaeger.RecordError(ctx, err, "WebSocket 升级失败")
		return err
	}
	defer ws.Close()
	if g.IsEmpty(accountName) {
		return errors.New("accountName is empty")
	}
	res, err := s.getGreeting(ctx, accountName)
	if err != nil {
		return err
	}
	if g.IsEmpty(&res) {
		return errors.New("account is empty")
	}
	if !g.IsEmpty(res.Greeting) {
		s.writeJSON(ws, &dto.WebSocketPushMsg{
			Type:    "message",
			Message: res.Greeting,
		})
		glog.Infof(ctx, "已发送开场白 - 用户: %v, 客服账号: %s, 长度: %d", res.Id, accountName, len(res.Greeting))
	} else {
		glog.Warningf(ctx, "客服账号未配置开场白 - accountName: %s, tenantId: %v", accountName, res.TenantId)
	}

	// key格式: tenantId:userId_platform （确保租户隔离）
	key := gconv.String(res.TenantId) + ":" + gconv.String(res.Creator) + ":" + gconv.String(platform)

	// 关闭旧连接
	if old := s.connections.Get(key); old != nil {
		old.(*accountWsConnection).Conn.Close()
	}

	// 注册新连接（携带 TenantId 和 AccountName）
	s.connections.Set(key, &accountWsConnection{
		UserId:      res.Creator,
		Platform:    platform,
		TenantId:    res.TenantId,
		AccountName: accountName,
		Conn:        ws,
		CreatedAt:   gtime.Now().Timestamp(),
	})

	// 处理消息（阻塞）
	s.handleConnection(ctx, key, ws)
	return nil
}

// handleConnection 处理 WebSocket 连接
func (s *accountWebsocketService) handleConnection(ctx context.Context, key string, conn *websocket.Conn) {
	defer func() {
		s.connections.Remove(key)
		conn.Close()
		glog.Infof(ctx, "WebSocket 连接断开 - %s", key)
	}()

	for {
		msgType, message, err := conn.ReadMessage()
		if err != nil {
			// 排除正常关闭情况：正常关闭、离开页面、无状态码关闭
			if websocket.IsUnexpectedCloseError(err,
				websocket.CloseNormalClosure,
				websocket.CloseGoingAway,
				websocket.CloseNoStatusReceived,
			) {
				jaeger.RecordError(ctx, err, "WebSocket 读取错误")
			}
			break
		}

		if msgType != websocket.TextMessage {
			continue
		}

		content := gconv.String(message)
		glog.Infof(ctx, "收到 WebSocket 消息 - %s: %s", key, content)

		// 解析 userId
		connInfo := s.connections.Get(key)
		if connInfo == nil {
			break
		}
		wsConn := connInfo.(*accountWsConnection)

		// 先检查对话轮数，>5 则只发卡片，跳过话术
		//checkCardBeforeProcess 已推送卡片消息，无需ack
		//if handled, err := checkCardBeforeProcess(ctx, wsConn.TenantId, wsConn.UserId, wsConn.Platform); err != nil {
		//	jaeger.RecordError(ctx, err, "卡片检查失败")
		//} else if handled {
		//	continue
		//}

		// 话术匹配并发布响应
		// status 暂时为空，表示任意行为匹配
		// isPushed=true表示已直接推送响应（话术匹配），无需ack
		// isPushed=false表示转发到RAGFlow，需要ack告知用户正在处理

		// 创建带有accountName的context，供GetTenantInfo使用
		//newCtx := ctx
		//if wsConn.AccountName != "" {
		//	newCtx = context.WithValue(ctx, "accountName", wsConn.AccountName)
		//}

		//isPushed, err := Speechcraft.ProcessAndPublish(newCtx, wsConn.UserId, wsConn.Platform, wsConn.TenantId, content, "", wsConn.AccountName)
		//if err != nil {
		//	jaeger.RecordError(ctx, err, "话术处理失败")
		//	s.writeJSON(conn, &dto.WebSocketPushMsg{Type: "error", Message: "消息处理失败"})
		//	continue
		//}

		// 只在转发到RAGFlow时发送ack（Go直接返回的不需要ack）
		//if !isPushed {
		//	s.writeJSON(conn, &dto.WebSocketPushMsg{Type: "ack", Message: "消息已接收，正在处理..."})
		//}
	}
}

// writeJSON 发送 JSON 消息
func (s *accountWebsocketService) writeJSON(conn *websocket.Conn, data interface{}) {
	jsonBytes, _ := gjson.Encode(data)
	conn.WriteMessage(websocket.TextMessage, jsonBytes)
}

// getGreeting 获取客服账号的开场白
func (s *accountWebsocketService) getGreeting(ctx context.Context, accountName string) (res *entity.Account, err error) {
	res, err = dao.Account.GetByAccountName(ctx, &dto.GetByAccountNameReq{
		AccountName: accountName,
	})
	if err != nil {
		jaeger.RecordError(ctx, err, "查询客服账号开场白失败")
		glog.Errorf(ctx, "查询开场白失败: %v", err)
		return
	}
	return
}