package service

import (
	"encoding/base64"
	"testing"

	"github.com/stretchr/testify/require"
)

func TestParseAudioUsesFormatSpecificSampleRates(t *testing.T) {
	pcm := base64.StdEncoding.EncodeToString(make([]byte, 48_000))
	duration, err := parseAudio(pcm, "pcm16")
	require.NoError(t, err)
	require.Equal(t, 1.0, duration)

	g711 := base64.StdEncoding.EncodeToString(make([]byte, 8_000))
	duration, err = parseAudio(g711, "g711_ulaw")
	require.NoError(t, err)
	require.Equal(t, 1.0, duration)
}

func TestParseAudioAndDecodeBase64AudioDataRejectInvalidEncoding(t *testing.T) {
	_, err := parseAudio("not base64", "pcm16")
	require.Error(t, err)

	_, err = DecodeBase64AudioData("not base64")
	require.Error(t, err)
}

func TestDecodeBase64AudioDataStripsDataURLPrefix(t *testing.T) {
	decoded, err := DecodeBase64AudioData("data:audio/pcm;base64,AAE=")

	require.NoError(t, err)
	require.Equal(t, "AAE=", decoded)
}

func TestCountAudioTokensUsesConfiguredInputAndOutputRates(t *testing.T) {
	oneSecondPCM := base64.StdEncoding.EncodeToString(make([]byte, 48_000))

	inputTokens, err := CountAudioTokenInput(oneSecondPCM, "pcm16")
	require.NoError(t, err)
	require.Equal(t, 27, inputTokens)

	outputTokens, err := CountAudioTokenOutput(oneSecondPCM, "pcm16")
	require.NoError(t, err)
	require.Equal(t, 13, outputTokens)

	inputTokens, err = CountAudioTokenInput("", "pcm16")
	require.NoError(t, err)
	require.Zero(t, inputTokens)
}