package logging

import (
	`os`
	`testing`
)

// TestMultiLogger tests GetMultiLogger and MultiLogger methods.
func TestMultiLogger(t *testing.T) {

	var l *MultiLogger
	var tempfile *os.File
	var tempfilePath string
	var keepLog bool
	var ltype string = "MultiLogger"
	var prefix string
	var testPrefix string
	var err error

	if tempfile, err = os.CreateTemp("", ".LOGGINGTEST_*"); err != nil {
		t.Fatalf("error when creating temporary log file '%v': %v", tempfile.Name(), err.Error())
	}
	tempfilePath = tempfile.Name()
	// We can close the handler immediately; we don't need it since the FileLogger opens its own.
	if err = tempfile.Close(); err != nil {
		t.Fatalf("error when closing handler for temporary log file '%v': %v", tempfile.Name(), err.Error())
	}

	l = GetMultiLogger(true, TestLogPrefix)

	if err = l.AddStdLogger("StdLogger", false, true, logFlags); err != nil {
		t.Fatalf("error when adding StdLogger to MultiLogger: %v", err.Error())
	}
	if err = l.AddFileLogger("FileLogger", logFlags, tempfilePath); err != nil {
		t.Fatalf("error when adding FileLogger to MultiLogger: %v", err.Error())
	}

	if err = l.AddDefaultLogger("DefaultLogger", DefaultEventID, logFlags, tempfilePath); err != nil {
		t.Fatalf("error when adding default logger to MultiLogger: %v", err.Error())
	}

	if err = l.AddWinLogger("WinLogger", DefaultEventID); err != nil {
		t.Fatalf("error when adding WinLogger to MultiLogger: %v", err.Error())
	}

	t.Logf("Logger %v passed Setup. Logger: %#v", ltype, l)

	if err = l.Alert(testAlert, ltype); err != nil {
		t.Fatalf("error for Alert: %v", err.Error())
	}

	if err = l.Crit(testCrit, ltype); err != nil {
		t.Fatalf("error for Crit: %v", err.Error())
	}

	if err = l.Debug(testDebug, ltype); err != nil {
		t.Fatalf("error for Debug: %v", err.Error())
	}

	if err = l.Emerg(testEmerg, ltype); err != nil {
		t.Fatalf("error for Emerg: %v", err.Error())
	}

	if err = l.Err(testErr, ltype); err != nil {
		t.Fatalf("error for Err: %v", err.Error())
	}

	if err = l.Info(testInfo, ltype); err != nil {
		t.Fatalf("error for Alert: %v", err.Error())
	}

	if err = l.Notice(testNotice, ltype); err != nil {
		t.Fatalf("error for Notice: %v", err.Error())
	}

	if err = l.Warning(testWarning, ltype); err != nil {
		t.Fatalf("error for Warning: %v", err.Error())
	}

	if prefix, err = l.GetPrefix(); err != nil {
		t.Fatalf("error when fetching prefix: %v", err.Error())
	}

	if ltype == "StdLogger" || ltype == "FileLogger" { // StdLogger (and thus FileLogger) adds a space at the end.
		testPrefix = TestLogPrefix + " "
	} else {
		testPrefix = TestLogPrefix
	}

	if prefix != testPrefix {
		t.Fatalf("true prefix ('%v') does not match TestLogPrefix ('%v')", prefix, TestLogPrefix)
	}
	if err = l.SetPrefix(TestLogAltPrefix); err != nil {
		t.Fatalf("error when setting prefix to %v: %v", TestLogAltPrefix, err.Error())
	} else {
		_ = l.SetPrefix(TestLogPrefix)
	}

	if err = l.DoDebug(false); err != nil {
		t.Fatalf("error when changing debug to false: %v", err.Error())
	} else {
		_ = l.DoDebug(true)
	}

	if err = l.Shutdown(); err != nil {
		t.Fatalf("Error when running Shutdown: %v", err.Error())
	}

	_, keepLog = os.LookupEnv(EnvVarKeepLog)

	if !keepLog {
		if err = os.Remove(tempfilePath); err != nil {
			t.Fatalf("error when removing temporary log file '%v': %v", tempfilePath, err.Error())
		}
	}

	t.Logf("Logger %v passed all logging targets.", ltype)
}