package gitea

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestRepositoryUsesTokenAndDecodesResponse(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/gitea/api/v1/repos/hop/demo" {
			t.Fatalf("path = %q", r.URL.Path)
		}
		if got := r.Header.Get("Authorization"); got != "token gitea-token" {
			t.Fatalf("authorization = %q", got)
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"id":42,"owner":{"login":"hop"},"name":"demo","full_name":"hop/demo","clone_url":"http://gitea/hop/demo.git","default_branch":"main"}`))
	}))
	defer server.Close()

	client, err := NewClient(server.URL+"/gitea", "gitea-token")
	if err != nil {
		t.Fatal(err)
	}
	repository, err := client.Repository(context.Background(), "hop", "demo")
	if err != nil {
		t.Fatal(err)
	}
	if repository.ID != 42 || repository.OwnerName() != "hop" || repository.DefaultBranch != "main" {
		t.Fatalf("unexpected repository: %#v", repository)
	}
}

func TestRepositoryRequiresToken(t *testing.T) {
	client, err := NewClient("http://gitea.test", "")
	if err != nil {
		t.Fatal(err)
	}
	if _, err := client.Repository(context.Background(), "hop", "demo"); err != ErrTokenNotConfigured {
		t.Fatalf("error = %v, want %v", err, ErrTokenNotConfigured)
	}
}

func TestUserUsesTokenAndDecodesStableID(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/api/v1/users/alice" {
			t.Fatalf("path = %q", r.URL.Path)
		}
		if got := r.Header.Get("Authorization"); got != "token gitea-token" {
			t.Fatalf("authorization = %q", got)
		}
		_, _ = w.Write([]byte(`{"id":42,"login":"alice"}`))
	}))
	defer server.Close()
	client, err := NewClient(server.URL, "gitea-token")
	if err != nil {
		t.Fatal(err)
	}
	user, err := client.User(context.Background(), "alice")
	if err != nil || user.ID != 42 || user.LoginName() != "alice" {
		t.Fatalf("user = %#v, err = %v", user, err)
	}
}

func TestAuthenticatedUserForwardsSessionCookie(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/user/settings" {
			t.Fatalf("path = %q", r.URL.Path)
		}
		if got := r.Header.Get("Cookie"); got != "i_like_gitea=session" {
			t.Fatalf("cookie = %q", got)
		}
		_, _ = w.Write([]byte(`<meta name="hop-signed-user-id" content="42"><meta name="hop-signed-user-login" content="alice">`))
	}))
	defer server.Close()
	client, err := NewClient(server.URL, "")
	if err != nil {
		t.Fatal(err)
	}
	user, authenticated, err := client.AuthenticatedUser(context.Background(), "i_like_gitea=session")
	if err != nil || !authenticated || user.ID != 42 || user.LoginName() != "alice" {
		t.Fatalf("user = %#v, authenticated = %t, err = %v", user, authenticated, err)
	}
}

func TestAuthenticatedUserRejectsLoginRedirect(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Redirect(w, r, "/user/login", http.StatusSeeOther)
	}))
	defer server.Close()
	client, err := NewClient(server.URL, "gitea-token")
	if err != nil {
		t.Fatal(err)
	}
	user, authenticated, err := client.AuthenticatedUser(context.Background(), "i_like_gitea=expired")
	if err != nil || authenticated || user.ID != 0 {
		t.Fatalf("user = %#v, authenticated = %t, err = %v", user, authenticated, err)
	}
}

func TestAuthenticatedUserRejectsUnidentifiableSettingsPage(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte(`<main>settings changed</main>`))
	}))
	defer server.Close()
	client, err := NewClient(server.URL, "gitea-token")
	if err != nil {
		t.Fatal(err)
	}
	_, authenticated, err := client.AuthenticatedUser(context.Background(), "i_like_gitea=session")
	if err == nil || authenticated {
		t.Fatalf("authenticated = %t, err = %v", authenticated, err)
	}
}

func TestAuthenticatedUserRejectsMissingSession(t *testing.T) {
	client, err := NewClient("http://gitea.test", "")
	if err != nil {
		t.Fatal(err)
	}
	user, authenticated, err := client.AuthenticatedUser(context.Background(), "")
	if err != nil || authenticated || user.ID != 0 {
		t.Fatalf("user = %#v, authenticated = %t, err = %v", user, authenticated, err)
	}
}

func TestViewerCanReadRepositoryForwardsSessionCookie(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/hop/private" {
			t.Fatalf("path = %q", r.URL.Path)
		}
		if got := r.Header.Get("Cookie"); got != "i_like_gitea=session" {
			t.Fatalf("cookie = %q", got)
		}
		w.WriteHeader(http.StatusOK)
	}))
	defer server.Close()

	client, err := NewClient(server.URL, "")
	if err != nil {
		t.Fatal(err)
	}
	allowed, err := client.ViewerCanReadRepository(context.Background(), "i_like_gitea=session", "hop", "private")
	if err != nil || !allowed {
		t.Fatalf("allowed = %t, err = %v", allowed, err)
	}
}

func TestViewerCannotReadMissingRepository(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusNotFound)
	}))
	defer server.Close()

	client, err := NewClient(server.URL, "")
	if err != nil {
		t.Fatal(err)
	}
	allowed, err := client.ViewerCanReadRepository(context.Background(), "i_like_gitea=session", "hop", "missing")
	if err != nil || allowed {
		t.Fatalf("allowed = %t, err = %v", allowed, err)
	}
}