package guerrilla

import (
	"testing"

	"bufio"
	"fmt"
	"net/textproto"
	"strings"
	"sync"

	"github.com/flashmob/go-guerrilla/backends"
	"github.com/flashmob/go-guerrilla/mocks"
)

// getMockServerConfig gets a mock ServerConfig struct used for creating a new server
func getMockServerConfig() *ServerConfig {
	sc := &ServerConfig{
		IsEnabled:       true, // not tested here
		Hostname:        "saggydimes.test.com",
		MaxSize:         1024, // smtp message max size
		PrivateKeyFile:  "./tests/mail.guerrillamail.com.key.pem",
		PublicKeyFile:   "./tests/mail.guerrillamail.com.cert.pem",
		Timeout:         5,
		ListenInterface: "127.0.0.1:2529",
		StartTLSOn:      true,
		TLSAlwaysOn:     false,
		MaxClients:      30, // not tested here
		LogFile:         "/dev/stdout",
	}
	return sc
}

// getMockServerConn gets a new server using sc. Server will be using a mocked TCP connection
// using the dummy backend
// RCP TO command only allows test.com host
func getMockServerConn(sc *ServerConfig, t *testing.T) (*mocks.Conn, *server) {

	backend, err := backends.New("dummy", backends.BackendConfig{"log_received_mails": true})
	if err != nil {
		t.Error("new dummy backend failed because:", err)
	}
	server, err := newServer(sc, backend)
	if err != nil {
		t.Error("new server failed because:", err)
	} else {
		server.setAllowedHosts([]string{"test.com"})
	}
	conn := mocks.NewConn()
	return conn, server
}

func TestHandleClient(t *testing.T) {

	sc := getMockServerConfig()
	conn, server := getMockServerConn(sc, t)
	// call the serve.handleClient() func in a goroutine.
	client := NewClient(conn.Server, 1)
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		server.handleClient(client)
		wg.Done()
	}()
	// Wait for the greeting from the server
	r := textproto.NewReader(bufio.NewReader(conn.Client))
	line, _ := r.ReadLine()
	fmt.Println(line)
	w := textproto.NewWriter(bufio.NewWriter(conn.Client))
	w.PrintfLine("HELO test.test.com")
	line, _ = r.ReadLine()
	fmt.Println(line)
	w.PrintfLine("QUIT")
	line, _ = r.ReadLine()
	fmt.Println("line is:", line)
	expected := "221 2.0.0 Bye"
	if strings.Index(line, expected) != 0 {
		t.Error("expected", expected, "but got:", line)
	}
	wg.Wait() // wait for handleClient to exit
}

// TODO
// - test github issue #44 and #42
// - test other commands

// also, could test
// - test allowsHost() and allowsHost()
// - test isInTransaction() (make sure it returns true after MAIL command, but false after HELO/EHLO/RSET/end of DATA
// - test to make sure client envelope
// - perhaps anything else that can be tested in server_test.go