/*
Copyright 2021 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import * as React from "react";
import BaseDialog from '../../views/dialogs/BaseDialog';
import GenericToast from "../toasts/GenericToast";
import Modal from "../../../Modal";
import QuestionDialog from './QuestionDialog';
import SdkConfig from "../../../SdkConfig";
import ToastStore from "../../../stores/ToastStore";
import {_t} from "../../../languageHandler";
import {MatrixClientPeg} from "../../../MatrixClientPeg";
import {OwnProfileStore} from "../../../stores/OwnProfileStore";
import {IPostmessage, IPostmessageResponseData, PostmessageAction} from "./HostSignupDialogTypes";

interface IProps {
    requestClose(): void;
}

interface IState {
    completed: boolean;
    error: string;
    loadIframe: boolean;
    minimized: boolean;
}

export default class HostSignupDialog extends React.PureComponent<IProps, IState> {
    private iframeRef: React.RefObject<HTMLIFrameElement> = React.createRef();
    private readonly hostSignupSetupUrl: string;

    constructor(props: IProps) {
        super(props);

        this.state = {
            completed: false,
            error: null,
            loadIframe: false,
            minimized: false,
        };

        this.hostSignupSetupUrl = SdkConfig.get().host_signup.url;
    }

    private messageHandler = async (message: IPostmessage) => {
        if (!this.hostSignupSetupUrl.startsWith(message.origin)) {
            return;
        }
        switch (message.data.action) {
            case PostmessageAction.HostSignupAccountDetailsRequest:
                await this.sendAccountDetails();
                break;
            case PostmessageAction.Minimize:
                this.minimizeDialog();
                break;
            case PostmessageAction.SetupComplete:
                // Set as completed but let the user close the modal themselves
                // so they have time to finish reading any information
                this.setState({
                    completed: true,
                });
                break;
            case PostmessageAction.CloseDialog:
                this.onFinished(true);
                break;
        }
    }

    private maximizeDialog = () => {
        this.setState({
            minimized: false,
        });
    }

    private minimizeDialog = () => {
        ToastStore.sharedInstance().addOrReplaceToast({
            priority: 0,
            key: 'host_signup_dialog',
            title: "Building your home",
            icon: "verification",
            props: {
                description: "",
                onAccept: this.maximizeDialog,
                acceptLabel: "Return",
            },
            component: GenericToast,
        });
        this.setState({
            minimized: true,
        });
    }

    private onFinished = (result: boolean) => {
        if (result || this.state.completed) {
            // We're done, close
            this.props.requestClose();
        } else {
            Modal.createDialog(
                QuestionDialog,
                {
                    title: _t("Confirm Abort Of Host Creation"),
                    description: _t(
                        "Are you sure you wish to abort creation of the host? The process cannot be continued.",
                    ),
                    button: _t("Abort"),
                    onFinished: result => {
                        if (result) {
                            this.props.requestClose();
                        }
                    },
                },
            );
        }
    }

    private sendMessage = (message: IPostmessageResponseData) => {
        this.iframeRef.current.contentWindow.postMessage(message, this.hostSignupSetupUrl);
    }

    private async sendAccountDetails() {
        const openIdToken = await MatrixClientPeg.get().getOpenIdToken();
        if (!openIdToken || !openIdToken.access_token) {
            this.setState({
                completed: true,
                error: _t("Failed to connect to your homeserver. Please close this dialog and try again."),
            });
            return;
        }
        this.sendMessage({
            action: PostmessageAction.HostSignupAccountDetails,
            account: {
                accessToken: await MatrixClientPeg.get().getAccessToken(),
                name: OwnProfileStore.instance.displayName,
                openIdToken: openIdToken.access_token,
                serverName: await MatrixClientPeg.get().getDomain(),
                userLocalpart: await MatrixClientPeg.get().getUserIdLocalpart(),
            },
        });
    }

    private loadIframe = () => {
        window.addEventListener("message", this.messageHandler);
        this.setState({
            loadIframe: true,
        });
    }

    public componentWillUnmount() {
        window.removeEventListener("message", this.messageHandler);
    }

    public render(): React.ReactNode {
        return (
            <div className={this.state.minimized ? "mx_HostSignupBaseDialog_minimized" : ""}>
                <BaseDialog
                    className="mx_HostSignupBaseDialog"
                    onFinished={this.onFinished}
                    title=""
                    hasCancel={true}
                >
                    <div className="mx_HostSignupDialog_container">
                        {this.state.loadIframe &&
                            <iframe
                                src={this.hostSignupSetupUrl}
                                ref={this.iframeRef}
                                sandbox="allow-forms allow-scripts allow-same-origin"
                            />
                        }
                        {!this.state.loadIframe &&
                            <div className="mx_HostSignupDialog_info">
                                <img
                                    alt="image of planet"
                                    src={require("../../../../res/img/host_signup.png")}
                                />
                                <div className="mx_HostSignupDialog_content">
                                    <h1>Unlock the power of Element</h1>
                                    <p>
                                        Congratulations! You taken your first steps into unlocking the full power of&nbsp;
                                        the Element app. In a few minutes, you'll be able to see how powerful our&nbsp;
                                        Matrix services are and take control of your conversation data.
                                    </p>
                                </div>
                                <div>
                                    <button onClick={this.props.requestClose}>Maybe later</button>
                                    <button onClick={this.loadIframe} className="mx_Dialog_primary">
                                        Lets get started
                                    </button>
                                    <button onClick={this.minimizeDialog}>Minimize</button>
                                </div>
                            </div>
                        }
                        {this.state.error &&
                            <div>
                                {this.state.error}
                            </div>
                        }
                    </div>
                </BaseDialog>
            </div>
        );
    }
}