package qq_obv11

// This file implements the client role of the OneBot v11 WebSocket channel: the
// adapter dials out to a OneBot (正向) WebSocket endpoint, authenticating with
// an access token when configured.

import (
	"context"
	"errors"
	"fmt"
	"net/url"
	"strings"
)

// connectClient dials the configured OneBot WebSocket endpoint and installs the
// resulting connection as the active session.
func (a *Adapter) connectClient(ctx context.Context) error {
	if a.cfg.RemoteURL == "" {
		return errors.New("qq-obv11: client mode requires remoteURL")
	}
	target := appendQueryToken(a.cfg.RemoteURL, a.cfg.AccessToken)
	conn, err := dialWS(ctx, a.cfg.DialContext, target, a.cfg.AccessToken)
	if err != nil {
		return fmt.Errorf("qq-obv11: dial onebot ws %s: %w", a.cfg.RemoteURL, err)
	}
	a.setConn(conn)
	a.log.Info("connected to onebot ws (client mode)", "url", a.cfg.RemoteURL)
	return nil
}

// appendQueryToken adds an access_token query parameter to a URL, preserving any
// existing query string.
func appendQueryToken(rawURL, token string) string {
	if token == "" {
		return rawURL
	}
	sep := "?"
	if strings.Contains(rawURL, "?") {
		sep = "&"
	}
	return rawURL + sep + "access_token=" + url.QueryEscape(token)
}