package mic

import (
	"testing"
	"time"
)

func TestEncodeWAVRoundTrip(t *testing.T) {
	t.Parallel()
	pcm := make([]byte, 3200)
	for i := range pcm {
		pcm[i] = byte(i % 256)
	}
	wav := EncodeWAV(pcm)
	if len(wav) != wavHeaderSize+len(pcm) {
		t.Fatalf("wav len = %d, want %d", len(wav), wavHeaderSize+len(pcm))
	}
	got, err := PCMBytesFromWAV(wav)
	if err != nil {
		t.Fatal(err)
	}
	if got != len(pcm) {
		t.Fatalf("pcm bytes = %d, want %d", got, len(pcm))
	}
}

func TestRecordingFilename(t *testing.T) {
	t.Parallel()
	name := RecordingFilename(mustTime("2006-01-02T15:04:05"))
	if name != "2006-01-02-150405.wav" {
		t.Fatalf("name = %q", name)
	}
	if !ValidRecordingFilename(name) {
		t.Fatal("expected valid filename")
	}
	if ValidRecordingFilename("../evil.wav") {
		t.Fatal("expected invalid filename")
	}
}

func mustTime(s string) (t time.Time) {
	t, _ = time.ParseInLocation("2006-01-02T15:04:05", s, time.Local)
	return t
}