package websocket

import (
	"github.com/gorilla/websocket"
	"time"
)

const (
	// ReadTimeLimit is the maximum time the server is willing to wait after receiving a message before receiving another one.
	ReadTimeLimit = 60 * time.Second
	// WriteTimeLimit is the maximum time the server is willing to wait to send a message.
	WriteTimeLimit = 10 * time.Second
	// ControlTimeLimit is the maximum time the server is willing to wait to send a control message like Ping or Close.
	ControlTimeLimit = (WriteTimeLimit * 5) / 10
	// PingDelay is the time between pings.
	// It must be less than ReadTimeLimit to account for latency and delays on either side.
	PingDelay = (ReadTimeLimit * 7) / 10
)

// A Connection corresponds to a pair of actors.
type Connection struct {
	conn *websocket.Conn
	r    reader
	w    writer
}

// ReadChannel returns the channel that can be used to read client messages from the connection.
// After receiving SocketClosed, the reader will close its channel.
func (c *Connection) ReadChannel() <-chan ClientMessage {
	return c.r.channel
}

// WriteChannel returns the channel that can be used to send server messages on the connection.
// After sending SocketClosed, the writer will close its channel; do not send any further messages on the channel.
func (c *Connection) WriteChannel() chan<- ServerMessage {
	return c.w.channel
}