/*
Copyright 2024 New Vector Ltd.
Copyright 2022 The Matrix.org Foundation C.I.C.
Copyright 2019 New Vector Ltd

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

import React from "react";
import { fireEvent, render, screen, waitFor, waitForElementToBeRemoved } from "@testing-library/react";
import { createClient, MatrixClient, MatrixError, OidcClientConfig } from "matrix-js-sdk/src/matrix";
import { mocked, MockedObject } from "jest-mock";
import fetchMock from "fetch-mock-jest";

import SdkConfig, { DEFAULTS } from "../../../../src/SdkConfig";
import { getMockClientWithEventEmitter, mkServerConfig, mockPlatformPeg, unmockPlatformPeg } from "../../../test-utils";
import Registration from "../../../../src/components/structures/auth/Registration";
import { makeDelegatedAuthConfig } from "../../../test-utils/oidc";
import SettingsStore from "../../../../src/settings/SettingsStore";
import { Features } from "../../../../src/settings/Settings";
import { startOidcLogin } from "../../../../src/utils/oidc/authorize";

jest.mock("../../../../src/utils/oidc/authorize", () => ({
    startOidcLogin: jest.fn(),
}));

jest.mock("matrix-js-sdk/src/matrix", () => ({
    ...jest.requireActual("matrix-js-sdk/src/matrix"),
    createClient: jest.fn(),
}));

/** The matrix versions our mock server claims to support */
const SERVER_SUPPORTED_MATRIX_VERSIONS = ["v1.1", "v1.5", "v1.6", "v1.8", "v1.9"];

describe("Registration", function () {
    let mockClient!: MockedObject<MatrixClient>;

    beforeEach(function () {
        SdkConfig.put({
            ...DEFAULTS,
            disable_custom_urls: true,
        });
        mockClient = getMockClientWithEventEmitter({
            registerRequest: jest.fn(),
            loginFlows: jest.fn(),
            getVersions: jest.fn().mockResolvedValue({ versions: SERVER_SUPPORTED_MATRIX_VERSIONS }),
        });
        mockClient.registerRequest.mockRejectedValueOnce(
            new MatrixError(
                {
                    flows: [{ stages: [] }],
                },
                401,
            ),
        );
        mockClient.loginFlows.mockResolvedValue({ flows: [{ type: "m.login.password" }] });
        mocked(createClient).mockImplementation((opts) => {
            mockClient.idBaseUrl = opts.idBaseUrl;
            mockClient.baseUrl = opts.baseUrl;
            return mockClient;
        });
        fetchMock.catch(404);
        fetchMock.get("https://matrix.org/_matrix/client/versions", {
            unstable_features: {},
            versions: SERVER_SUPPORTED_MATRIX_VERSIONS,
        });
        mockPlatformPeg({
            startSingleSignOn: jest.fn(),
        });
    });

    afterEach(function () {
        jest.restoreAllMocks();
        fetchMock.restore();
        SdkConfig.reset(); // we touch the config, so clean up
        unmockPlatformPeg();
    });

    const defaultProps = {
        defaultDeviceDisplayName: "test-device-display-name",
        onLoggedIn: jest.fn(),
        onLoginClick: jest.fn(),
        onServerConfigChange: jest.fn(),
    };

    const defaultHsUrl = "https://matrix.org";
    const defaultIsUrl = "https://vector.im";

    function getRawComponent(
        hsUrl = defaultHsUrl,
        isUrl = defaultIsUrl,
        authConfig?: OidcClientConfig,
        mobileRegister?: boolean,
    ) {
        return (
            <Registration
                {...defaultProps}
                serverConfig={mkServerConfig(hsUrl, isUrl, authConfig)}
                mobileRegister={mobileRegister}
            />
        );
    }

    function getComponent(hsUrl?: string, isUrl?: string, authConfig?: OidcClientConfig, mobileRegister?: boolean) {
        return render(getRawComponent(hsUrl, isUrl, authConfig, mobileRegister));
    }

    it("should show server picker", async function () {
        const { container } = getComponent();
        expect(container.querySelector(".mx_ServerPicker")).toBeTruthy();
    });

    it("should show form when custom URLs disabled", async function () {
        const { container } = getComponent();
        await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));
        expect(container.querySelector("form")).toBeTruthy();
    });

    it("should show SSO options if those are available", async () => {
        mockClient.loginFlows.mockClear().mockResolvedValue({ flows: [{ type: "m.login.sso" }] });
        const { container } = getComponent();
        await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));

        const ssoButton = container.querySelector(".mx_SSOButton");
        expect(ssoButton).toBeTruthy();
    });

    it("should handle serverConfig updates correctly", async () => {
        mockClient.loginFlows.mockResolvedValue({
            flows: [
                {
                    type: "m.login.sso",
                },
            ],
        });

        const { container, rerender } = render(getRawComponent());
        await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));

        fireEvent.click(container.querySelector(".mx_SSOButton")!);
        expect(mockClient.baseUrl).toBe("https://matrix.org");

        fetchMock.get("https://server2/_matrix/client/versions", {
            unstable_features: {},
            versions: SERVER_SUPPORTED_MATRIX_VERSIONS,
        });
        rerender(getRawComponent("https://server2"));
        await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));

        fireEvent.click(container.querySelector(".mx_SSOButton")!);
        expect(mockClient.baseUrl).toBe("https://server2");
    });

    describe("when delegated authentication is configured and enabled", () => {
        const authConfig = makeDelegatedAuthConfig();
        const clientId = "test-client-id";
        // @ts-ignore
        authConfig.metadata["prompt_values_supported"] = ["create"];

        beforeEach(() => {
            // mock a statically registered client to avoid dynamic registration
            SdkConfig.put({
                oidc_static_clients: {
                    [authConfig.metadata.issuer]: {
                        client_id: clientId,
                    },
                },
            });

            fetchMock.get(`${defaultHsUrl}/_matrix/client/unstable/org.matrix.msc2965/auth_issuer`, {
                issuer: authConfig.metadata.issuer,
            });
            fetchMock.get("https://auth.org/.well-known/openid-configuration", authConfig.metadata);
            fetchMock.get(authConfig.metadata.jwks_uri!, { keys: [] });
        });

        describe("when oidc native flow is not enabled in settings", () => {
            beforeEach(() => {
                jest.spyOn(SettingsStore, "getValue").mockReturnValue(false);
            });

            it("should display user/pass registration form", async () => {
                const { container } = getComponent(defaultHsUrl, defaultIsUrl, authConfig);
                await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));
                expect(container.querySelector("form")).toBeTruthy();
                expect(mockClient.loginFlows).toHaveBeenCalled();
                expect(mockClient.registerRequest).toHaveBeenCalled();
            });
        });

        describe("when oidc native flow is enabled in settings", () => {
            beforeEach(() => {
                jest.spyOn(SettingsStore, "getValue").mockImplementation((key) => key === Features.OidcNativeFlow);
            });

            it("should display oidc-native continue button", async () => {
                const { container } = getComponent(defaultHsUrl, defaultIsUrl, authConfig);
                await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));
                // no form
                expect(container.querySelector("form")).toBeFalsy();

                expect(await screen.findByText("Continue")).toBeTruthy();
            });

            it("should start OIDC login flow as registration on button click", async () => {
                getComponent(defaultHsUrl, defaultIsUrl, authConfig);
                await waitForElementToBeRemoved(() => screen.queryAllByLabelText("Loading…"));

                fireEvent.click(await screen.findByText("Continue"));

                expect(startOidcLogin).toHaveBeenCalledWith(
                    authConfig,
                    clientId,
                    defaultHsUrl,
                    defaultIsUrl,
                    // isRegistration
                    true,
                );
            });
        });

        describe("when is mobile registeration", () => {
            it("should not show server picker", async function () {
                const { container } = getComponent(defaultHsUrl, defaultIsUrl, undefined, true);
                expect(container.querySelector(".mx_ServerPicker")).toBeFalsy();
            });

            it("should show username field with autocaps disabled", async function () {
                const { container } = getComponent(defaultHsUrl, defaultIsUrl, undefined, true);

                await waitFor(() =>
                    expect(container.querySelector("#mx_RegistrationForm_username")).toHaveAttribute(
                        "autocapitalize",
                        "none",
                    ),
                );
            });

            it("should show password and confirm password fields in separate rows", async function () {
                const { container } = getComponent(defaultHsUrl, defaultIsUrl, undefined, true);

                await waitFor(() => expect(container.querySelector("#mx_RegistrationForm_username")).toBeTruthy());
                // when password and confirm password fields are in separate rows there should be 4 rather than 3
                expect(container.querySelectorAll(".mx_AuthBody_fieldRow")).toHaveLength(4);
            });
        });
    });
});