package updatecdn

import (
	"crypto/sha256"
	"encoding/hex"
	"io"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestHandlerServesCurrentResolveAndRange(t *testing.T) {
	dir := t.TempDir()
	filesDir := filepath.Join(dir, "files")
	if err := os.Mkdir(filesDir, 0o755); err != nil {
		t.Fatal(err)
	}
	packageData := []byte("0123456789abcdef")
	packageName := "tx64upd7007000"
	if err := os.WriteFile(filepath.Join(filesDir, packageName), packageData, 0o600); err != nil {
		t.Fatal(err)
	}
	hash := sha256.Sum256(packageData)
	manifestPath := writeTestManifest(t, dir, Manifest{
		SchemaVersion: ManifestSchemaVersion,
		Desktop: map[string]map[string]DesktopRelease{
			"win64": {"stable": {Build: 7007000, File: packageName, SHA256: hex.EncodeToString(hash[:])}},
		},
		Apps: map[string]map[string]ApplicationRelease{
			"ios": {"stable": {ID: 8, Version: "12.9.1", URL: "https://apps.apple.com/app/id1", Notes: map[string]string{"en": "Update available"}}},
		},
	})
	store, err := NewStore(manifestPath, filesDir)
	if err != nil {
		t.Fatal(err)
	}
	handler, err := NewHandler(store)
	if err != nil {
		t.Fatal(err)
	}
	server := httptest.NewServer(handler)
	defer server.Close()

	resp, err := http.Get(server.URL + "/current4")
	if err != nil {
		t.Fatal(err)
	}
	currentBody, _ := io.ReadAll(resp.Body)
	resp.Body.Close()
	if resp.StatusCode != http.StatusOK || !strings.Contains(string(currentBody), `"released":7007000`) {
		t.Fatalf("current4 = %d %s", resp.StatusCode, currentBody)
	}

	client, err := NewClient(server.URL, time.Second)
	if err != nil {
		t.Fatal(err)
	}
	resolved, err := client.Resolve(t.Context(), ResolveRequest{Platform: "ios", Version: "12.9.0", LangCode: "en"})
	if err != nil {
		t.Fatal(err)
	}
	if resolved == nil || resolved.ID != 8 || resolved.Version != "12.9.1" {
		t.Fatalf("resolved = %#v", resolved)
	}

	req, err := http.NewRequest(http.MethodGet, server.URL+"/files/"+packageName, nil)
	if err != nil {
		t.Fatal(err)
	}
	req.Header.Set("Range", "bytes=2-5")
	rangeResp, err := http.DefaultClient.Do(req)
	if err != nil {
		t.Fatal(err)
	}
	rangeBody, _ := io.ReadAll(rangeResp.Body)
	rangeResp.Body.Close()
	if rangeResp.StatusCode != http.StatusPartialContent || string(rangeBody) != "2345" {
		t.Fatalf("range = %d %q", rangeResp.StatusCode, rangeBody)
	}
}