package ws

import (
	"encoding/json"

	"visiona-local/server/pkg/logger"

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

func ServerLogsHandler(hub *Hub, broadcaster *logger.Broadcaster) gin.HandlerFunc {
	return func(c *gin.Context) {
		conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
		if err != nil {
			return
		}
		defer conn.Close()

		client := &Client{Conn: conn, Send: make(chan []byte, 100)}
		sub := &Subscription{Client: client, Room: "server-logs"}
		hub.RegisterSync(sub)
		defer hub.Unregister(sub)

		// Send buffered recent logs to the newly connected client
		if broadcaster != nil {
			for _, entry := range broadcaster.Recent() {
				data, err := json.Marshal(entry)
				if err != nil {
					continue
				}
				select {
				case client.Send <- data:
				default:
					return
				}
			}
		}

		// Read pump — drain incoming messages (close frames)
		go func() {
			defer conn.Close()
			for {
				if _, _, err := conn.ReadMessage(); err != nil {
					break
				}
			}
		}()

		// Write pump
		for msg := range client.Send {
			if err := conn.WriteMessage(websocket.TextMessage, msg); err != nil {
				return
			}
		}
	}
}