package ts3

import (
	"bufio"
	"context"
	"io"
	"net"
	"strings"
	"testing"
	"time"
)

func TestEscapeRoundTrip(t *testing.T) {
	values := []string{"abc", "a b|c", "slash/and\\backslash", "ąęść", "x\ny\tz"}
	for _, v := range values {
		if got := unescape(escape(v)); got != v {
			t.Fatalf("roundtrip %q -> %q", v, got)
		}
	}
}

func TestParseFields(t *testing.T) {
	f := parseFields(`clid=12 client_nickname=Jan\sKowalski connection_client_ip=1.2.3.4`)
	if f["client_nickname"] != "Jan Kowalski" || f["clid"] != "12" {
		t.Fatalf("bad fields: %#v", f)
	}
}

func TestCreateChannelUsesDatabaseIDAndRefreshesClientID(t *testing.T) {
	ln, err := net.Listen("tcp", "127.0.0.1:0")
	if err != nil {
		t.Fatal(err)
	}
	defer ln.Close()

	commands := make(chan []string, 1)
	go func() {
		c, err := ln.Accept()
		if err != nil {
			return
		}
		defer c.Close()
		_, _ = io.WriteString(c, "TS3\nWelcome to the TeamSpeak 3 ServerQuery interface\n")
		r := bufio.NewReader(c)
		var got []string
		for {
			line, err := r.ReadString('\n')
			if err != nil {
				break
			}
			line = strings.TrimSpace(line)
			if line == "" {
				continue
			}
			got = append(got, line)
			switch {
			case strings.HasPrefix(line, "login "):
				_, _ = io.WriteString(c, "error id=0 msg=ok\n")
			case strings.HasPrefix(line, "use "):
				_, _ = io.WriteString(c, "error id=0 msg=ok\n")
			case line == "clientlist -ip -uid":
				_, _ = io.WriteString(c, "clid=8 cid=1 client_database_id=42 client_nickname=Jan\\sKowalski client_type=0 client_unique_identifier=abc connection_client_ip=1.2.3.4\nerror id=0 msg=ok\n")
			case strings.HasPrefix(line, "channelcreate "):
				_, _ = io.WriteString(c, "cid=321\nerror id=0 msg=ok\n")
			case strings.HasPrefix(line, "setclientchannelgroup "):
				_, _ = io.WriteString(c, "error id=0 msg=ok\n")
			case strings.HasPrefix(line, "clientmove "):
				_, _ = io.WriteString(c, "error id=0 msg=ok\n")
			case line == "quit":
				commands <- got
				return
			}
		}
		commands <- got
	}()

	q := &Query{Addr: ln.Addr().String(), User: "u", Password: "p", VoicePort: 9987, Timeout: 2 * time.Second}
	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
	defer cancel()
	cid, err := q.CreateChannelForClient(ctx, Client{ID: 7, DatabaseID: 42, Nick: "old", UID: "abc", IP: "1.2.3.4"}, 5, "Moj kanal", "temat", "haslo")
	if err != nil {
		t.Fatal(err)
	}
	if cid != 321 {
		t.Fatalf("cid=%d", cid)
	}
	got := <-commands
	joined := strings.Join(got, "\n")
	if !strings.Contains(joined, "setclientchannelgroup cgid=5 cid=321 cldbid=42") {
		t.Fatalf("missing channel group command:\n%s", joined)
	}
	if !strings.Contains(joined, "clientmove clid=8 cid=321") {
		t.Fatalf("expected refreshed clid:\n%s", joined)
	}
}