package web

import (
	"net/http"
	"net/http/httptest"
	"net/url"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"webfilebrowser/internal/auth"
	"webfilebrowser/internal/config"
)

func TestAuthenticatedBrowserListsRootsAndProvidesBreadcrumbNavigation(t *testing.T) {
	rootPath, handler := newBrowsingApplication(t)
	if err := os.Mkdir(filepath.Join(rootPath, "documents"), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(rootPath, "documents", "report.txt"), []byte("report"), 0o600); err != nil {
		t.Fatal(err)
	}
	cookie := completeSeedPasswordChange(t, handler)

	rootResponse := getWithCookie(handler, "/", cookie)
	if rootResponse.Code != http.StatusOK {
		t.Fatalf("GET / status = %d, want %d", rootResponse.Code, http.StatusOK)
	}
	if body := rootResponse.Body.String(); !strings.Contains(body, "Media") || !strings.Contains(body, "/browse?root=Media") {
		t.Errorf("GET / did not render the configured root: %s", body)
	}

	directoryResponse := getWithCookie(handler, "/browse?root=Media&path=documents", cookie)
	if directoryResponse.Code != http.StatusOK {
		t.Fatalf("GET nested directory status = %d, want %d", directoryResponse.Code, http.StatusOK)
	}
	body := directoryResponse.Body.String()
	for _, text := range []string{"Media", "documents", "report.txt", "File"} {
		if !strings.Contains(body, text) {
			t.Errorf("GET nested directory body is missing %q: %s", text, body)
		}
	}
}

func TestBrowserRejectsTraversalAndSymlinkEscapeRequests(t *testing.T) {
	rootPath, handler := newBrowsingApplication(t)
	outsidePath := t.TempDir()
	if err := os.WriteFile(filepath.Join(outsidePath, "secret.txt"), []byte("outside-root"), 0o600); err != nil {
		t.Fatal(err)
	}
	if err := os.Symlink(outsidePath, filepath.Join(rootPath, "escape")); err != nil {
		t.Fatal(err)
	}
	cookie := completeSeedPasswordChange(t, handler)

	for _, target := range []string{"/browse?root=Media&path=../outside", "/browse?root=Media&path=escape"} {
		t.Run(target, func(t *testing.T) {
			response := getWithCookie(handler, target, cookie)
			if response.Code != http.StatusNotFound {
				t.Errorf("GET %s status = %d, want %d", target, response.Code, http.StatusNotFound)
			}
			if strings.Contains(response.Body.String(), "outside-root") {
				t.Errorf("GET %s exposed content outside the configured root", target)
			}
		})
	}
}

func TestBrowserThemeTogglePersistsInLocalStorage(t *testing.T) {
	_, handler := newBrowsingApplication(t)
	cookie := completeSeedPasswordChange(t, handler)

	response := getWithCookie(handler, "/", cookie)
	if response.Code != http.StatusOK {
		t.Fatalf("GET / status = %d, want %d", response.Code, http.StatusOK)
	}
	body := response.Body.String()
	for _, text := range []string{`id="theme-toggle"`, "localStorage.getItem", "localStorage.setItem", "data-theme"} {
		if !strings.Contains(body, text) {
			t.Errorf("GET / is missing theme persistence behavior %q", text)
		}
	}
}

func newBrowsingApplication(t *testing.T) (string, http.Handler) {
	t.Helper()
	rootPath := t.TempDir()
	store, err := auth.Open(filepath.Join(t.TempDir(), "webfilebrowser.db"), auth.Options{})
	if err != nil {
		t.Fatalf("Open() error = %v", err)
	}
	t.Cleanup(func() { _ = store.Close() })
	return rootPath, New(store, config.Root{Name: "Media", Path: rootPath})
}

func completeSeedPasswordChange(t *testing.T, handler http.Handler) *http.Cookie {
	t.Helper()
	loginResponse := postForm(handler, loginPath, url.Values{
		"email":    {auth.SeedAdminEmail},
		"password": {auth.SeedAdminPassword},
	}, nil)
	cookie := responseCookie(t, loginResponse, sessionCookieName)
	changeResponse := postForm(handler, changePasswordPath, url.Values{
		"current_password": {auth.SeedAdminPassword},
		"new_password":     {"A-new-password-123!"},
	}, cookie)
	if changeResponse.Code != http.StatusSeeOther {
		t.Fatalf("POST %s status = %d, want %d", changePasswordPath, changeResponse.Code, http.StatusSeeOther)
	}
	return cookie
}

func getWithCookie(handler http.Handler, target string, cookie *http.Cookie) *httptest.ResponseRecorder {
	request := httptest.NewRequest(http.MethodGet, target, nil)
	request.AddCookie(cookie)
	response := httptest.NewRecorder()
	handler.ServeHTTP(response, request)
	return response
}