package server

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/dexidp/dex/storage"
)

func TestHandleHealth(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	httpServer, server := newTestServer(ctx, t, nil)
	defer httpServer.Close()

	rr := httptest.NewRecorder()
	server.ServeHTTP(rr, httptest.NewRequest("GET", "/healthz", nil))
	if rr.Code != http.StatusOK {
		t.Errorf("expected 200 got %d", rr.Code)
	}
}

type badStorage struct {
	storage.Storage
}

func (b *badStorage) CreateAuthRequest(r storage.AuthRequest) error {
	return errors.New("storage unavailable")
}

func TestHandleHealthFailure(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	httpServer, server := newTestServer(ctx, t, func(c *Config) {
		c.Storage = &badStorage{c.Storage}
	})
	defer httpServer.Close()

	rr := httptest.NewRecorder()
	server.ServeHTTP(rr, httptest.NewRequest("GET", "/healthz", nil))
	if rr.Code != http.StatusInternalServerError {
		t.Errorf("expected 500 got %d", rr.Code)
	}
}

type emptyStorage struct {
	storage.Storage
}

func (*emptyStorage) GetAuthRequest(string) (storage.AuthRequest, error) {
	return storage.AuthRequest{}, storage.ErrNotFound
}

func TestHandleInvalidOAuth2Callbacks(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	httpServer, server := newTestServer(ctx, t, func(c *Config) {
		c.Storage = &emptyStorage{c.Storage}
	})
	defer httpServer.Close()

	tests := []struct {
		TargetURI    string
		ExpectedCode int
	}{
		{"/callback", http.StatusBadRequest},
		{"/callback?code=&state=", http.StatusBadRequest},
		{"/callback?code=AAAAAAA&state=BBBBBBB", http.StatusBadRequest},
	}

	rr := httptest.NewRecorder()

	for i, r := range tests {
		server.ServeHTTP(rr, httptest.NewRequest("GET", r.TargetURI, nil))
		if rr.Code != r.ExpectedCode {
			t.Fatalf("test %d expected %d, got %d", i, r.ExpectedCode, rr.Code)
		}
	}
}

func TestHandleInvalidSAMLCallbacks(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	httpServer, server := newTestServer(ctx, t, func(c *Config) {
		c.Storage = &emptyStorage{c.Storage}
	})
	defer httpServer.Close()

	type requestForm struct {
		RelayState string
	}
	tests := []struct {
		RequestForm  requestForm
		ExpectedCode int
	}{
		{requestForm{}, http.StatusBadRequest},
		{requestForm{RelayState: "AAAAAAA"}, http.StatusBadRequest},
	}

	rr := httptest.NewRecorder()

	for i, r := range tests {
		jsonValue, err := json.Marshal(r.RequestForm)
		if err != nil {
			t.Fatal(err.Error())
		}
		server.ServeHTTP(rr, httptest.NewRequest("POST", "/callback", bytes.NewBuffer(jsonValue)))
		if rr.Code != r.ExpectedCode {
			t.Fatalf("test %d expected %d, got %d", i, r.ExpectedCode, rr.Code)
		}
	}
}