/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

import { render, RenderResult, screen } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import React from "react";
import { mocked, MockedObject } from "jest-mock";
import { Crypto, MatrixClient, MatrixError } from "matrix-js-sdk/src/matrix";
import { defer, IDeferred, sleep } from "matrix-js-sdk/src/utils";
import { BackupTrustInfo, KeyBackupInfo } from "matrix-js-sdk/src/crypto-api";

import {
    filterConsole,
    flushPromises,
    getMockClientWithEventEmitter,
    mockClientMethodsCrypto,
    mockClientMethodsServer,
} from "../../../../test-utils";
import CreateSecretStorageDialog from "../../../../../src/async-components/views/dialogs/security/CreateSecretStorageDialog";
import Modal from "../../../../../src/Modal";
import RestoreKeyBackupDialog from "../../../../../src/components/views/dialogs/security/RestoreKeyBackupDialog";

describe("CreateSecretStorageDialog", () => {
    let mockClient: MockedObject<MatrixClient>;
    let mockCrypto: MockedObject<Crypto.CryptoApi>;

    beforeEach(() => {
        mockClient = getMockClientWithEventEmitter({
            ...mockClientMethodsServer(),
            ...mockClientMethodsCrypto(),
            uploadDeviceSigningKeys: jest.fn().mockImplementation(async () => {
                await sleep(0); // CreateSecretStorageDialog doesn't expect this to resolve immediately
                throw new MatrixError({ flows: [] });
            }),
        });

        mockCrypto = mocked(mockClient.getCrypto()!);
        Object.assign(mockCrypto, {
            isKeyBackupTrusted: jest.fn(),
            isDehydrationSupported: jest.fn(() => false),
            bootstrapCrossSigning: jest.fn(),
            bootstrapSecretStorage: jest.fn(),
        });
    });

    afterEach(() => {
        jest.restoreAllMocks();
    });

    function renderComponent(
        props: Partial<React.ComponentProps<typeof CreateSecretStorageDialog>> = {},
    ): RenderResult {
        const onFinished = jest.fn();
        return render(<CreateSecretStorageDialog onFinished={onFinished} {...props} />);
    }

    it("shows a loading spinner initially", async () => {
        const { container } = renderComponent();
        expect(screen.getByTestId("spinner")).toBeDefined();
        expect(container).toMatchSnapshot();
        await flushPromises();
    });

    describe("when there is an error fetching the backup version", () => {
        filterConsole("Error fetching backup data from server");

        it("shows an error", async () => {
            mockClient.getKeyBackupVersion.mockImplementation(async () => {
                throw new Error("bleh bleh");
            });

            const result = renderComponent();
            // XXX the error message is... misleading.
            await result.findByText("Unable to query secret storage status");
            expect(result.container).toMatchSnapshot();
        });
    });

    it("shows 'Generate a Security Key' text if no key backup is present", async () => {
        const result = renderComponent();
        await flushPromises();
        expect(result.container).toMatchSnapshot();
        result.getByText("Generate a Security Key");
    });

    describe("when canUploadKeysWithPasswordOnly", () => {
        // spy on Modal.createDialog
        let modalSpy: jest.SpyInstance;

        // deferred which should be resolved to indicate that the created dialog has completed
        let restoreDialogFinishedDefer: IDeferred<[done?: boolean]>;

        beforeEach(() => {
            mockClient.getKeyBackupVersion.mockResolvedValue({} as KeyBackupInfo);
            mockClient.uploadDeviceSigningKeys.mockImplementation(async () => {
                await sleep(0);
                throw new MatrixError({
                    flows: [{ stages: ["m.login.password"] }],
                });
            });

            restoreDialogFinishedDefer = defer<[done?: boolean]>();
            modalSpy = jest.spyOn(Modal, "createDialog").mockReturnValue({
                finished: restoreDialogFinishedDefer.promise,
                close: jest.fn(),
            });
        });

        it("prompts for a password and then shows RestoreKeyBackupDialog", async () => {
            const result = renderComponent();
            await result.findByText(/Enter your account password to confirm the upgrade/);
            expect(result.container).toMatchSnapshot();

            await userEvent.type(result.getByPlaceholderText("Password"), "my pass");
            result.getByRole("button", { name: "Next" }).click();

            expect(modalSpy).toHaveBeenCalledWith(
                RestoreKeyBackupDialog,
                {
                    keyCallback: expect.any(Function),
                    showSummary: false,
                },
                undefined,
                false,
                false,
            );

            restoreDialogFinishedDefer.resolve([]);
        });

        it("calls bootstrapSecretStorage once keys are restored if the backup is now trusted", async () => {
            mockClient.isCryptoEnabled.mockReturnValue(true);

            const result = renderComponent();
            await result.findByText(/Enter your account password to confirm the upgrade/);
            expect(result.container).toMatchSnapshot();

            await userEvent.type(result.getByPlaceholderText("Password"), "my pass");
            result.getByRole("button", { name: "Next" }).click();

            expect(modalSpy).toHaveBeenCalled();

            // While we restore the key backup, its signature becomes accepted
            mockCrypto.isKeyBackupTrusted.mockResolvedValue({ trusted: true } as BackupTrustInfo);

            restoreDialogFinishedDefer.resolve([]);
            await flushPromises();

            // XXX no idea why this is a sensible thing to do. I just work here.
            expect(mockCrypto.bootstrapCrossSigning).toHaveBeenCalled();
            expect(mockCrypto.bootstrapSecretStorage).toHaveBeenCalled();

            await result.findByText("Your keys are now being backed up from this device.");
        });

        describe("when there is an error fetching the backup version after RestoreKeyBackupDialog", () => {
            filterConsole("Error fetching backup data from server");

            it("handles the error sensibly", async () => {
                const result = renderComponent();
                await result.findByText(/Enter your account password to confirm the upgrade/);
                expect(result.container).toMatchSnapshot();

                await userEvent.type(result.getByPlaceholderText("Password"), "my pass");
                result.getByRole("button", { name: "Next" }).click();

                expect(modalSpy).toHaveBeenCalled();

                mockClient.getKeyBackupVersion.mockImplementation(async () => {
                    throw new Error("bleh bleh");
                });
                restoreDialogFinishedDefer.resolve([]);
                await result.findByText("Unable to query secret storage status");
            });
        });
    });

    describe("when backup is present but not trusted", () => {
        beforeEach(() => {
            mockClient.getKeyBackupVersion.mockResolvedValue({} as KeyBackupInfo);
        });

        it("shows migrate text, then 'RestoreKeyBackupDialog' if 'Restore' is clicked", async () => {
            const result = renderComponent();
            await result.findByText("Restore your key backup to upgrade your encryption");
            expect(result.container).toMatchSnapshot();

            // before we click "Restore", set up a spy on createDialog
            const restoreDialogFinishedDefer = defer<[done?: boolean]>();
            const modalSpy = jest.spyOn(Modal, "createDialog").mockReturnValue({
                finished: restoreDialogFinishedDefer.promise,
                close: jest.fn(),
            });

            result.getByRole("button", { name: "Restore" }).click();

            expect(modalSpy).toHaveBeenCalledWith(
                RestoreKeyBackupDialog,
                {
                    keyCallback: expect.any(Function),
                    showSummary: false,
                },
                undefined,
                false,
                false,
            );

            // simulate RestoreKeyBackupDialog completing, to run that code path
            restoreDialogFinishedDefer.resolve([]);
        });
    });
});