package query

import (
	"context"
	"database/sql"
	"database/sql/driver"
	"errors"
	"fmt"
	"net"
	"net/http"
	"regexp"
	"testing"

	sq "github.com/Masterminds/squirrel"
	"github.com/muhlemmer/gu"
	"github.com/stretchr/testify/require"

	"github.com/zitadel/zitadel/internal/api/authz"
	"github.com/zitadel/zitadel/internal/domain"
	"github.com/zitadel/zitadel/internal/zerrors"
)

var (
	expectedSessionQuery = regexp.QuoteMeta(`SELECT projections.sessions8.id,` +
		` projections.sessions8.creation_date,` +
		` projections.sessions8.change_date,` +
		` projections.sessions8.sequence,` +
		` projections.sessions8.state,` +
		` projections.sessions8.resource_owner,` +
		` projections.sessions8.creator,` +
		` projections.sessions8.user_id,` +
		` projections.sessions8.user_resource_owner,` +
		` projections.sessions8.user_checked_at,` +
		` projections.login_names3.login_name,` +
		` projections.users13_humans.display_name,` +
		` projections.sessions8.password_checked_at,` +
		` projections.sessions8.intent_checked_at,` +
		` projections.sessions8.webauthn_checked_at,` +
		` projections.sessions8.webauthn_user_verified,` +
		` projections.sessions8.totp_checked_at,` +
		` projections.sessions8.otp_sms_checked_at,` +
		` projections.sessions8.otp_email_checked_at,` +
		` projections.sessions8.metadata,` +
		` projections.sessions8.token_id,` +
		` projections.sessions8.user_agent_fingerprint_id,` +
		` projections.sessions8.user_agent_ip,` +
		` projections.sessions8.user_agent_description,` +
		` projections.sessions8.user_agent_header,` +
		` projections.sessions8.expiration` +
		` FROM projections.sessions8` +
		` LEFT JOIN projections.login_names3 ON projections.sessions8.user_id = projections.login_names3.user_id AND projections.sessions8.instance_id = projections.login_names3.instance_id` +
		` LEFT JOIN projections.users13_humans ON projections.sessions8.user_id = projections.users13_humans.user_id AND projections.sessions8.instance_id = projections.users13_humans.instance_id` +
		` LEFT JOIN projections.users13 ON projections.sessions8.user_id = projections.users13.id AND projections.sessions8.instance_id = projections.users13.instance_id` +
		` AS OF SYSTEM TIME '-1 ms'`)
	expectedSessionsQuery = regexp.QuoteMeta(`SELECT projections.sessions8.id,` +
		` projections.sessions8.creation_date,` +
		` projections.sessions8.change_date,` +
		` projections.sessions8.sequence,` +
		` projections.sessions8.state,` +
		` projections.sessions8.resource_owner,` +
		` projections.sessions8.creator,` +
		` projections.sessions8.user_id,` +
		` projections.sessions8.user_resource_owner,` +
		` projections.sessions8.user_checked_at,` +
		` projections.login_names3.login_name,` +
		` projections.users13_humans.display_name,` +
		` projections.sessions8.password_checked_at,` +
		` projections.sessions8.intent_checked_at,` +
		` projections.sessions8.webauthn_checked_at,` +
		` projections.sessions8.webauthn_user_verified,` +
		` projections.sessions8.totp_checked_at,` +
		` projections.sessions8.otp_sms_checked_at,` +
		` projections.sessions8.otp_email_checked_at,` +
		` projections.sessions8.metadata,` +
		` projections.sessions8.user_agent_fingerprint_id,` +
		` projections.sessions8.user_agent_ip,` +
		` projections.sessions8.user_agent_description,` +
		` projections.sessions8.user_agent_header,` +
		` projections.sessions8.expiration,` +
		` COUNT(*) OVER ()` +
		` FROM projections.sessions8` +
		` LEFT JOIN projections.login_names3 ON projections.sessions8.user_id = projections.login_names3.user_id AND projections.sessions8.instance_id = projections.login_names3.instance_id` +
		` LEFT JOIN projections.users13_humans ON projections.sessions8.user_id = projections.users13_humans.user_id AND projections.sessions8.instance_id = projections.users13_humans.instance_id` +
		` LEFT JOIN projections.users13 ON projections.sessions8.user_id = projections.users13.id AND projections.sessions8.instance_id = projections.users13.instance_id` +
		` AS OF SYSTEM TIME '-1 ms'`)

	sessionCols = []string{
		"id",
		"creation_date",
		"change_date",
		"sequence",
		"state",
		"resource_owner",
		"creator",
		"user_id",
		"user_resource_owner",
		"user_checked_at",
		"login_name",
		"display_name",
		"password_checked_at",
		"intent_checked_at",
		"webauthn_checked_at",
		"webauthn_user_verified",
		"totp_checked_at",
		"otp_sms_checked_at",
		"otp_email_checked_at",
		"metadata",
		"token",
		"user_agent_fingerprint_id",
		"user_agent_ip",
		"user_agent_description",
		"user_agent_header",
		"expiration",
	}

	sessionsCols = []string{
		"id",
		"creation_date",
		"change_date",
		"sequence",
		"state",
		"resource_owner",
		"creator",
		"user_id",
		"user_resource_owner",
		"user_checked_at",
		"login_name",
		"display_name",
		"password_checked_at",
		"intent_checked_at",
		"webauthn_checked_at",
		"webauthn_user_verified",
		"totp_checked_at",
		"otp_sms_checked_at",
		"otp_email_checked_at",
		"metadata",
		"user_agent_fingerprint_id",
		"user_agent_ip",
		"user_agent_description",
		"user_agent_header",
		"expiration",
		"count",
	}
)

func Test_SessionsPrepare(t *testing.T) {
	type want struct {
		sqlExpectations sqlExpectation
		err             checkErr
	}
	tests := []struct {
		name    string
		prepare interface{}
		want    want
		object  interface{}
	}{
		{
			name:    "prepareSessionsQuery no result",
			prepare: prepareSessionsQuery,
			want: want{
				sqlExpectations: mockQueries(
					expectedSessionsQuery,
					nil,
					nil,
				),
			},
			object: &Sessions{Sessions: []*Session{}},
		},
		{
			name:    "prepareSessionQuery",
			prepare: prepareSessionsQuery,
			want: want{
				sqlExpectations: mockQueries(
					expectedSessionsQuery,
					sessionsCols,
					[][]driver.Value{
						{
							"session-id",
							testNow,
							testNow,
							uint64(20211109),
							domain.SessionStateActive,
							"ro",
							"creator",
							"user-id",
							"resourceOwner",
							testNow,
							"login-name",
							"display-name",
							testNow,
							testNow,
							testNow,
							true,
							testNow,
							testNow,
							testNow,
							[]byte(`{"key": "dmFsdWU="}`),
							"fingerPrintID",
							"1.2.3.4",
							"agentDescription",
							[]byte(`{"foo":["foo","bar"]}`),
							testNow,
						},
					},
				),
			},
			object: &Sessions{
				SearchResponse: SearchResponse{
					Count: 1,
				},
				Sessions: []*Session{
					{
						ID:            "session-id",
						CreationDate:  testNow,
						ChangeDate:    testNow,
						Sequence:      20211109,
						State:         domain.SessionStateActive,
						ResourceOwner: "ro",
						Creator:       "creator",
						UserFactor: SessionUserFactor{
							UserID:        "user-id",
							UserCheckedAt: testNow,
							LoginName:     "login-name",
							DisplayName:   "display-name",
							ResourceOwner: "resourceOwner",
						},
						PasswordFactor: SessionPasswordFactor{
							PasswordCheckedAt: testNow,
						},
						IntentFactor: SessionIntentFactor{
							IntentCheckedAt: testNow,
						},
						WebAuthNFactor: SessionWebAuthNFactor{
							WebAuthNCheckedAt: testNow,
							UserVerified:      true,
						},
						TOTPFactor: SessionTOTPFactor{
							TOTPCheckedAt: testNow,
						},
						OTPSMSFactor: SessionOTPFactor{
							OTPCheckedAt: testNow,
						},
						OTPEmailFactor: SessionOTPFactor{
							OTPCheckedAt: testNow,
						},
						Metadata: map[string][]byte{
							"key": []byte("value"),
						},
						UserAgent: domain.UserAgent{
							FingerprintID: gu.Ptr("fingerPrintID"),
							IP:            net.IPv4(1, 2, 3, 4),
							Description:   gu.Ptr("agentDescription"),
							Header:        http.Header{"foo": []string{"foo", "bar"}},
						},
						Expiration: testNow,
					},
				},
			},
		},
		{
			name:    "prepareSessionsQuery multiple result",
			prepare: prepareSessionsQuery,
			want: want{
				sqlExpectations: mockQueries(
					expectedSessionsQuery,
					sessionsCols,
					[][]driver.Value{
						{
							"session-id",
							testNow,
							testNow,
							uint64(20211109),
							domain.SessionStateActive,
							"ro",
							"creator",
							"user-id",
							"resourceOwner",
							testNow,
							"login-name",
							"display-name",
							testNow,
							testNow,
							testNow,
							true,
							testNow,
							testNow,
							testNow,
							[]byte(`{"key": "dmFsdWU="}`),
							"fingerPrintID",
							"1.2.3.4",
							"agentDescription",
							[]byte(`{"foo":["foo","bar"]}`),
							testNow,
						},
						{
							"session-id2",
							testNow,
							testNow,
							uint64(20211109),
							domain.SessionStateActive,
							"ro",
							"creator2",
							"user-id2",
							"resourceOwner",
							testNow,
							"login-name2",
							"display-name2",
							testNow,
							testNow,
							testNow,
							false,
							testNow,
							testNow,
							testNow,
							[]byte(`{"key": "dmFsdWU="}`),
							"fingerPrintID",
							"1.2.3.4",
							"agentDescription",
							[]byte(`{"foo":["foo","bar"]}`),
							testNow,
						},
					},
				),
			},
			object: &Sessions{
				SearchResponse: SearchResponse{
					Count: 2,
				},
				Sessions: []*Session{
					{
						ID:            "session-id",
						CreationDate:  testNow,
						ChangeDate:    testNow,
						Sequence:      20211109,
						State:         domain.SessionStateActive,
						ResourceOwner: "ro",
						Creator:       "creator",
						UserFactor: SessionUserFactor{
							UserID:        "user-id",
							UserCheckedAt: testNow,
							LoginName:     "login-name",
							DisplayName:   "display-name",
							ResourceOwner: "resourceOwner",
						},
						PasswordFactor: SessionPasswordFactor{
							PasswordCheckedAt: testNow,
						},
						IntentFactor: SessionIntentFactor{
							IntentCheckedAt: testNow,
						},
						WebAuthNFactor: SessionWebAuthNFactor{
							WebAuthNCheckedAt: testNow,
							UserVerified:      true,
						},
						TOTPFactor: SessionTOTPFactor{
							TOTPCheckedAt: testNow,
						},
						OTPSMSFactor: SessionOTPFactor{
							OTPCheckedAt: testNow,
						},
						OTPEmailFactor: SessionOTPFactor{
							OTPCheckedAt: testNow,
						},
						Metadata: map[string][]byte{
							"key": []byte("value"),
						},
						UserAgent: domain.UserAgent{
							FingerprintID: gu.Ptr("fingerPrintID"),
							IP:            net.IPv4(1, 2, 3, 4),
							Description:   gu.Ptr("agentDescription"),
							Header:        http.Header{"foo": []string{"foo", "bar"}},
						},
						Expiration: testNow,
					},
					{
						ID:            "session-id2",
						CreationDate:  testNow,
						ChangeDate:    testNow,
						Sequence:      20211109,
						State:         domain.SessionStateActive,
						ResourceOwner: "ro",
						Creator:       "creator2",
						UserFactor: SessionUserFactor{
							UserID:        "user-id2",
							UserCheckedAt: testNow,
							LoginName:     "login-name2",
							DisplayName:   "display-name2",
							ResourceOwner: "resourceOwner",
						},
						PasswordFactor: SessionPasswordFactor{
							PasswordCheckedAt: testNow,
						},
						IntentFactor: SessionIntentFactor{
							IntentCheckedAt: testNow,
						},
						WebAuthNFactor: SessionWebAuthNFactor{
							WebAuthNCheckedAt: testNow,
							UserVerified:      false,
						},
						TOTPFactor: SessionTOTPFactor{
							TOTPCheckedAt: testNow,
						},
						OTPSMSFactor: SessionOTPFactor{
							OTPCheckedAt: testNow,
						},
						OTPEmailFactor: SessionOTPFactor{
							OTPCheckedAt: testNow,
						},
						Metadata: map[string][]byte{
							"key": []byte("value"),
						},
						UserAgent: domain.UserAgent{
							FingerprintID: gu.Ptr("fingerPrintID"),
							IP:            net.IPv4(1, 2, 3, 4),
							Description:   gu.Ptr("agentDescription"),
							Header:        http.Header{"foo": []string{"foo", "bar"}},
						},
						Expiration: testNow,
					},
				},
			},
		},
		{
			name:    "prepareSessionsQuery sql err",
			prepare: prepareSessionsQuery,
			want: want{
				sqlExpectations: mockQueryErr(
					expectedSessionsQuery,
					sql.ErrConnDone,
				),
				err: func(err error) (error, bool) {
					if !errors.Is(err, sql.ErrConnDone) {
						return fmt.Errorf("err should be sql.ErrConnDone got: %w", err), false
					}
					return nil, true
				},
			},
			object: (*Sessions)(nil),
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			assertPrepare(t, tt.prepare, tt.object, tt.want.sqlExpectations, tt.want.err, defaultPrepareArgs...)
		})
	}
}

func Test_SessionPrepare(t *testing.T) {
	type want struct {
		sqlExpectations sqlExpectation
		err             checkErr
	}
	tests := []struct {
		name    string
		prepare interface{}
		want    want
		object  interface{}
	}{
		{
			name:    "prepareSessionQuery no result",
			prepare: prepareSessionQueryTesting(t, ""),
			want: want{
				sqlExpectations: mockQueriesScanErr(
					expectedSessionQuery,
					nil,
					nil,
				),
				err: func(err error) (error, bool) {
					if !zerrors.IsNotFound(err) {
						return fmt.Errorf("err should be zitadel.NotFoundError got: %w", err), false
					}
					return nil, true
				},
			},
			object: (*Session)(nil),
		},
		{
			name:    "prepareSessionQuery found",
			prepare: prepareSessionQueryTesting(t, "tokenID"),
			want: want{
				sqlExpectations: mockQuery(
					expectedSessionQuery,
					sessionCols,
					[]driver.Value{
						"session-id",
						testNow,
						testNow,
						uint64(20211109),
						domain.SessionStateActive,
						"ro",
						"creator",
						"user-id",
						"resourceOwner",
						testNow,
						"login-name",
						"display-name",
						testNow,
						testNow,
						testNow,
						true,
						testNow,
						testNow,
						testNow,
						[]byte(`{"key": "dmFsdWU="}`),
						"tokenID",
						"fingerPrintID",
						"1.2.3.4",
						"agentDescription",
						[]byte(`{"foo":["foo","bar"]}`),
						testNow,
					},
				),
			},
			object: &Session{
				ID:            "session-id",
				CreationDate:  testNow,
				ChangeDate:    testNow,
				Sequence:      20211109,
				State:         domain.SessionStateActive,
				ResourceOwner: "ro",
				Creator:       "creator",
				UserFactor: SessionUserFactor{
					UserID:        "user-id",
					UserCheckedAt: testNow,
					LoginName:     "login-name",
					DisplayName:   "display-name",
					ResourceOwner: "resourceOwner",
				},
				PasswordFactor: SessionPasswordFactor{
					PasswordCheckedAt: testNow,
				},
				IntentFactor: SessionIntentFactor{
					IntentCheckedAt: testNow,
				},
				WebAuthNFactor: SessionWebAuthNFactor{
					WebAuthNCheckedAt: testNow,
					UserVerified:      true,
				},
				TOTPFactor: SessionTOTPFactor{
					TOTPCheckedAt: testNow,
				},
				OTPSMSFactor: SessionOTPFactor{
					OTPCheckedAt: testNow,
				},
				OTPEmailFactor: SessionOTPFactor{
					OTPCheckedAt: testNow,
				},
				Metadata: map[string][]byte{
					"key": []byte("value"),
				},
				UserAgent: domain.UserAgent{
					FingerprintID: gu.Ptr("fingerPrintID"),
					IP:            net.IPv4(1, 2, 3, 4),
					Description:   gu.Ptr("agentDescription"),
					Header:        http.Header{"foo": []string{"foo", "bar"}},
				},
				Expiration: testNow,
			},
		},
		{
			name:    "prepareSessionQuery sql err",
			prepare: prepareSessionQueryTesting(t, ""),
			want: want{
				sqlExpectations: mockQueryErr(
					expectedSessionQuery,
					sql.ErrConnDone,
				),
				err: func(err error) (error, bool) {
					if !errors.Is(err, sql.ErrConnDone) {
						return fmt.Errorf("err should be sql.ErrConnDone got: %w", err), false
					}
					return nil, true
				},
			},
			object: (*Session)(nil),
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			assertPrepare(t, tt.prepare, tt.object, tt.want.sqlExpectations, tt.want.err, defaultPrepareArgs...)
		})
	}
}

func prepareSessionQueryTesting(t *testing.T, token string) func(context.Context, prepareDatabase) (sq.SelectBuilder, func(*sql.Row) (*Session, error)) {
	return func(ctx context.Context, db prepareDatabase) (sq.SelectBuilder, func(*sql.Row) (*Session, error)) {
		builder, scan := prepareSessionQuery(ctx, db)
		return builder, func(row *sql.Row) (*Session, error) {
			session, tokenID, err := scan(row)
			require.Equal(t, tokenID, token)
			return session, err
		}
	}
}

func Test_sessionCheckPermission(t *testing.T) {
	type args struct {
		ctx             context.Context
		resourceOwner   string
		creator         string
		useragent       domain.UserAgent
		userFactor      SessionUserFactor
		permissionCheck domain.PermissionCheck
	}
	tests := []struct {
		name    string
		args    args
		wantErr bool
	}{
		{
			name: "permission check, no user in context",
			args: args{
				ctx:             authz.NewMockContextWithAgent("instance", "org", "", ""),
				resourceOwner:   "instance",
				creator:         "creator",
				permissionCheck: expectedFailedPermissionCheck("instance", ""),
			},
			wantErr: true,
		},
		{
			name: "permission check, factor, no user in context",
			args: args{
				ctx:             authz.NewMockContextWithAgent("instance", "org", "", ""),
				resourceOwner:   "instance",
				creator:         "creator",
				userFactor:      SessionUserFactor{ResourceOwner: "resourceowner", UserID: "user"},
				permissionCheck: expectedFailedPermissionCheck("resourceowner", "user"),
			},
			wantErr: true,
		},
		{
			name: "no permission check, creator",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user", "agent"),
				resourceOwner: "instance",
				creator:       "user",
			},
			wantErr: false,
		},
		{
			name: "no permission check, same user",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user", "agent"),
				resourceOwner: "instance",
				creator:       "creator",
				userFactor:    SessionUserFactor{UserID: "user"},
			},
			wantErr: false,
		},
		{
			name: "no permission check, same useragent",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user1", "agent"),
				resourceOwner: "instance",
				creator:       "creator",
				userFactor:    SessionUserFactor{UserID: "user2"},
				useragent: domain.UserAgent{
					FingerprintID: gu.Ptr("agent"),
				},
			},
			wantErr: false,
		},
		{
			name: "permission check, factor",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user", "agent"),
				resourceOwner: "instance",
				creator:       "not-user",
				useragent: domain.UserAgent{
					FingerprintID: gu.Ptr("not-agent"),
				},
				userFactor:      SessionUserFactor{UserID: "user2", ResourceOwner: "resourceowner2"},
				permissionCheck: expectedSuccessfulPermissionCheck("resourceowner2", "user2"),
			},
			wantErr: false,
		},
		{
			name: "permission check, factor, error",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user", "agent"),
				resourceOwner: "instance",
				creator:       "not-user",
				useragent: domain.UserAgent{
					FingerprintID: gu.Ptr("not-agent"),
				},
				userFactor:      SessionUserFactor{UserID: "user2", ResourceOwner: "resourceowner2"},
				permissionCheck: expectedFailedPermissionCheck("resourceowner2", "user2"),
			},
			wantErr: true,
		},
		{
			name: "permission check",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user", "agent"),
				resourceOwner: "instance",
				creator:       "not-user",
				useragent: domain.UserAgent{
					FingerprintID: gu.Ptr("not-agent"),
				},
				userFactor:      SessionUserFactor{},
				permissionCheck: expectedSuccessfulPermissionCheck("instance", ""),
			},
			wantErr: false,
		},
		{
			name: "permission check, error",
			args: args{
				ctx:           authz.NewMockContextWithAgent("instance", "org", "user", "agent"),
				resourceOwner: "instance",
				creator:       "not-user",
				useragent: domain.UserAgent{
					FingerprintID: gu.Ptr("not-agent"),
				},
				userFactor:      SessionUserFactor{},
				permissionCheck: expectedFailedPermissionCheck("instance", ""),
			},
			wantErr: true,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := sessionCheckPermission(tt.args.ctx, tt.args.resourceOwner, tt.args.creator, tt.args.useragent, tt.args.userFactor, tt.args.permissionCheck)
			if tt.wantErr {
				require.Error(t, err)
				return
			}
			require.NoError(t, err)
		})
	}
}

func expectedSuccessfulPermissionCheck(resourceOwner, userID string) func(ctx context.Context, permission, orgID, resourceID string) (err error) {
	return func(ctx context.Context, permission, orgID, resourceID string) (err error) {
		if orgID == resourceOwner && resourceID == userID {
			return nil
		}
		return fmt.Errorf("permission check failed: %s %s", orgID, resourceID)
	}
}

func expectedFailedPermissionCheck(resourceOwner, userID string) func(ctx context.Context, permission, orgID, resourceID string) (err error) {
	return func(ctx context.Context, permission, orgID, resourceID string) (err error) {
		if orgID == resourceOwner && resourceID == userID {
			return fmt.Errorf("permission check failed: %s %s", orgID, resourceID)
		}
		return nil
	}
}