package proxy

import (
	"fmt"
	"reflect"
	"testing"
	"time"

	"github.com/pomerium/pomerium/internal/sessions"

	"github.com/golang/mock/gomock"
	"github.com/golang/protobuf/proto"
	"github.com/golang/protobuf/ptypes"
	pb "github.com/pomerium/pomerium/proto/authenticate"
	mock "github.com/pomerium/pomerium/proto/authenticate/mock_authenticate"
)

var fixedDate = time.Date(2009, 11, 17, 20, 34, 58, 651387237, time.UTC)

// rpcMsg implements the gomock.Matcher interface
type rpcMsg struct {
	msg proto.Message
}

func (r *rpcMsg) Matches(msg interface{}) bool {
	m, ok := msg.(proto.Message)
	if !ok {
		return false
	}
	return proto.Equal(m, r.msg)
}

func (r *rpcMsg) String() string {
	return fmt.Sprintf("is %s", r.msg)
}

func TestProxy_AuthenticateRedeem(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	mockAuthenticateClient := mock.NewMockAuthenticatorClient(ctrl)
	req := &pb.AuthenticateRequest{Code: "unit_test"}
	mockExpire, err := ptypes.TimestampProto(fixedDate)
	if err != nil {
		t.Fatalf("%v failed converting timestamp", err)
	}

	mockAuthenticateClient.EXPECT().Authenticate(
		gomock.Any(),
		&rpcMsg{msg: req},
	).Return(&pb.AuthenticateReply{
		AccessToken:  "mocked access token",
		RefreshToken: "mocked refresh token",
		IdToken:      "mocked id token",
		User:         "user1",
		Email:        "test@email.com",
		Expiry:       mockExpire,
	}, nil)
	p := &Proxy{AuthenticatorClient: mockAuthenticateClient}
	tests := []struct {
		name    string
		idToken string
		want    *sessions.SessionState
		wantErr bool
	}{
		{"good", "unit_test", &sessions.SessionState{
			AccessToken:      "mocked access token",
			RefreshToken:     "mocked refresh token",
			IDToken:          "mocked id token",
			User:             "user1",
			Email:            "test@email.com",
			RefreshDeadline:  (fixedDate).Truncate(time.Second),
			LifetimeDeadline: extendDeadline(p.CookieLifetimeTTL),
			ValidDeadline:    extendDeadline(p.CookieExpire),
		}, false},
		{"empty code", "", nil, true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			got, err := p.AuthenticateRedeem(tt.idToken)
			if (err != nil) != tt.wantErr {
				t.Errorf("Proxy.AuthenticateValidate() error = %v,\n wantErr %v", err, tt.wantErr)
				return
			}
			if got != nil {
				if got.AccessToken != "mocked access token" {
					t.Errorf("authenticate: invalid access token")
				}
				if got.RefreshToken != "mocked refresh token" {
					t.Errorf("authenticate: invalid refresh token")
				}
				if got.IDToken != "mocked id token" {
					t.Errorf("authenticate: invalid id token")
				}
				if got.User != "user1" {
					t.Errorf("authenticate: invalid user")
				}
				if got.Email != "test@email.com" {
					t.Errorf("authenticate: invalid email")
				}
			}
		})
	}
}
func TestProxy_AuthenticateValidate(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	mockAuthenticateClient := mock.NewMockAuthenticatorClient(ctrl)
	req := &pb.ValidateRequest{IdToken: "unit_test"}

	mockAuthenticateClient.EXPECT().Validate(
		gomock.Any(),
		&rpcMsg{msg: req},
	).Return(&pb.ValidateReply{IsValid: false}, nil)

	p := &Proxy{AuthenticatorClient: mockAuthenticateClient}
	tests := []struct {
		name    string
		idToken string
		want    bool
		wantErr bool
	}{
		{"good", "unit_test", false, false},
		{"empty id token", "", false, true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {

			got, err := p.AuthenticateValidate(tt.idToken)
			if (err != nil) != tt.wantErr {
				t.Errorf("Proxy.AuthenticateValidate() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if got != tt.want {
				t.Errorf("Proxy.AuthenticateValidate() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestProxy_AuthenticateRefresh(t *testing.T) {
	ctrl := gomock.NewController(t)
	defer ctrl.Finish()
	mockRefreshClient := mock.NewMockAuthenticatorClient(ctrl)
	req := &pb.RefreshRequest{RefreshToken: "unit_test"}
	mockExpire, err := ptypes.TimestampProto(fixedDate)
	if err != nil {
		t.Fatalf("%v failed converting timestamp", err)
	}
	mockRefreshClient.EXPECT().Refresh(
		gomock.Any(),
		&rpcMsg{msg: req},
	).Return(&pb.RefreshReply{
		AccessToken: "mocked access token",
		Expiry:      mockExpire,
	}, nil).AnyTimes()

	tests := []struct {
		name         string
		refreshToken string
		wantAT       string
		wantExp      time.Time
		wantErr      bool
	}{
		{"good", "unit_test", "mocked access token", fixedDate, false},
		{"missing refresh", "", "", time.Time{}, true},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			p := &Proxy{AuthenticatorClient: mockRefreshClient}

			got, gotExp, err := p.AuthenticateRefresh(tt.refreshToken)
			if (err != nil) != tt.wantErr {
				t.Errorf("Proxy.AuthenticateRefresh() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if got != tt.wantAT {
				t.Errorf("Proxy.AuthenticateRefresh() got = %v, want %v", got, tt.wantAT)
			}
			if !reflect.DeepEqual(gotExp, tt.wantExp) {
				t.Errorf("Proxy.AuthenticateRefresh() gotExp = %v, want %v", gotExp, tt.wantExp)
			}
		})
	}
}

func Test_extendDeadline(t *testing.T) {

	tests := []struct {
		name string
		ttl  time.Duration
		want time.Time
	}{
		{"good", time.Second, time.Now().Add(time.Second).Truncate(time.Second)},
		{"test nanoseconds truncated", 500 * time.Nanosecond, time.Now().Truncate(time.Second)},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := extendDeadline(tt.ttl); !reflect.DeepEqual(got, tt.want) {
				t.Errorf("extendDeadline() = %v, want %v", got, tt.want)
			}
		})
	}
}