package callflow

import (
	"context"
	"testing"
	"time"
)

func TestCaptureTurnWaitsForSpeechAndStopsOnSilence(t *testing.T) {
	silence := make([]byte, 640)
	voice := make([]byte, 640)
	for i := 0; i < len(voice); i += 2 {
		voice[i] = 0xE8
		voice[i+1] = 0x03 // 1000, little-endian PCM16
	}
	session := NewMemorySession(append(append(append([]byte{}, silence...), voice...), silence...))
	captured, err := captureTurn(context.Background(), session, CaptureConfig{
		FirstSpeechTimeout: 20 * time.Millisecond,
		MaxDuration:        20 * time.Millisecond,
		EndSilence:         time.Millisecond,
		VoiceThreshold:     100,
	})
	if err != nil {
		t.Fatal(err)
	}
	if len(captured.PCM) < len(voice) || len(captured.PCM) >= len(silence)+len(voice)+len(silence) || captured.Window.StartedAt.IsZero() || captured.Window.EndedAt.Before(captured.Window.StartedAt) {
		t.Fatalf("capture lost voice, duration boundary or observed times: pcm=%d window=%+v", len(captured.PCM), captured.Window)
	}
}