package download

import (
	"context"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"testing"
)

func TestDownloaderHasNoClientTimeout(t *testing.T) {
	d := NewWithOptions(true, false)
	if d.http.Timeout != 0 {
		t.Fatalf("http timeout = %v, want 0 (no global timeout)", d.http.Timeout)
	}
}

func TestDownloaderFile(t *testing.T) {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte("abc123"))
	}))
	defer ts.Close()

	d := New()
	out := filepath.Join(t.TempDir(), "x", "a.bin")
	if err := d.File(context.Background(), ts.URL, out); err != nil {
		t.Fatalf("File() error = %v", err)
	}

	b, err := os.ReadFile(out)
	if err != nil {
		t.Fatalf("ReadFile() error = %v", err)
	}
	if string(b) != "abc123" {
		t.Fatalf("contents = %q, want %q", string(b), "abc123")
	}
}

func TestManifestDetection(t *testing.T) {
	if !isManifestResponse("application/dash+xml", []byte("x")) {
		t.Fatalf("expected dash content-type to be manifest")
	}
	if !isManifestResponse("application/octet-stream", []byte("<?xml version='1.0'?><MPD></MPD>")) {
		t.Fatalf("expected MPD XML body to be manifest")
	}
	if !isManifestResponse("text/plain", []byte("#EXTM3U\n#EXT-X-VERSION:3")) {
		t.Fatalf("expected HLS body to be manifest")
	}
	if isManifestResponse("audio/flac", []byte("fLaC")) {
		t.Fatalf("did not expect flac to be manifest")
	}
}