package lumberjack_afero

import (
	"fmt"
	"github.com/spf13/afero"
	"io"
	"os"
	"testing"
	"time"
)

var FS afero.Fs
var FakeDay int

func TestMain(m *testing.M) {
	tdir, err := os.MkdirTemp("", "lumberjack_afero_test")
	fmt.Println("Test Dir: ", tdir)
	if err != nil {
		panic(err)
	}
	osfs := afero.NewOsFs()
	FS = afero.NewBasePathFs(osfs, tdir)
	FakeDay = 0
	currentTime = testCurrentTime
	m.Run()
	fmt.Println("Test Dir: ", tdir)
	fmt.Println("Please check the results manually and cleanup the test directory.")
}

func testCurrentTime() time.Time {
	now := time.Now()
	fakeTime := now.AddDate(0, 0, FakeDay)
	return fakeTime
}

func printLine(t *testing.T, f io.Writer, l ...interface{}) {
	_, err := fmt.Fprintln(f, l...)
	if err != nil {
		t.Fatalf("failed to print line: %v", err)
	}
}

func TestCommonCase(t *testing.T) {
	l := &Logger{
		Filesystem: FS,
		Filename:   "common-case-test.log",
		MaxSize:    1,
		MaxBackups: 5,
		LocalTime:  false,
		Compress:   true,
	}
	printLine(t, l, "common-case-test at start")
	printLine(t, l, "common-case-test 2")
	FakeDay = 3
	printLine(t, l, "common-case-test next 3 day")
	FakeDay = 4
	printLine(t, l, "common-case-test next 4 day")
	printLine(t, l, "will test a super long text")
	for i := 0; i <= 114514; i++ {
		printLine(t, l, "1145141919810")
	}
	printLine(t, l, "after the super long text")
	printLine(t, l, "then close the logger")
	_ = l.Close()
	l = &Logger{
		Filesystem: FS,
		Filename:   "common-case-test.log",
		MaxSize:    1,
		MaxBackups: 5,
		LocalTime:  false,
		Compress:   true,
	}
	printLine(t, l, "recreate the logger")
	printLine(t, l, "then close the logger")
	_ = l.Close()
}