/*
Copyright 2019 Vector Creations Ltd

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 React from 'react';
import { IGeneratedSas } from "matrix-js-sdk/src/crypto/verification/SAS";
import { DeviceInfo } from "matrix-js-sdk/src//crypto/deviceinfo";

import { _t, _td } from '../../../languageHandler';
import { PendingActionSpinner } from "../right_panel/EncryptionInfo";
import AccessibleButton from "../elements/AccessibleButton";
import { fixupColorFonts } from '../../../utils/FontManager';

interface IProps {
    pending?: boolean;
    displayName?: string; // required if pending is true
    device?: DeviceInfo;
    onDone: () => void;
    onCancel: () => void;
    sas: IGeneratedSas;
    isSelf?: boolean;
    inDialog?: boolean; // whether this component is being shown in a dialog and to use DialogButtons
}

interface IState {
    pending: boolean;
    cancelling?: boolean;
}

function capFirst(s) {
    return s.charAt(0).toUpperCase() + s.slice(1);
}

export default class VerificationShowSas extends React.Component<IProps, IState> {
    constructor(props: IProps) {
        super(props);

        this.state = {
            pending: false,
        };
    }

    public componentWillMount(): void {
        // As this component is also used before login (during complete security),
        // also make sure we have a working emoji font to display the SAS emojis here.
        // This is also done from LoggedInView.
        fixupColorFonts();
    }

    private onMatchClick = (): void => {
        this.setState({ pending: true });
        this.props.onDone();
    };

    private onDontMatchClick = (): void => {
        this.setState({ cancelling: true });
        this.props.onCancel();
    };

    render() {
        let sasDisplay;
        let sasCaption;
        if (this.props.sas.emoji) {
            const emojiBlocks = this.props.sas.emoji.map(
                (emoji, i) => <div className="mx_VerificationShowSas_emojiSas_block" key={i}>
                    <div className="mx_VerificationShowSas_emojiSas_emoji">
                        { emoji[0] }
                    </div>
                    <div className="mx_VerificationShowSas_emojiSas_label">
                        { _t(capFirst(emoji[1])) }
                    </div>
                </div>,
            );
            sasDisplay = <div className="mx_VerificationShowSas_emojiSas">
                { emojiBlocks.slice(0, 4) }
                <div className="mx_VerificationShowSas_emojiSas_break" />
                { emojiBlocks.slice(4) }
            </div>;
            sasCaption = this.props.isSelf ?
                _t(
                    "Confirm the emoji below are displayed on both devices, in the same order:",
                ):
                _t(
                    "Verify this user by confirming the following emoji appear on their screen.",
                );
        } else if (this.props.sas.decimal) {
            const numberBlocks = this.props.sas.decimal.map((num, i) => <span key={i}>
                { num }
            </span>);
            sasDisplay = <div className="mx_VerificationShowSas_decimalSas">
                { numberBlocks }
            </div>;
            sasCaption = this.props.isSelf ?
                _t(
                    "Verify this device by confirming the following number appears on its screen.",
                ):
                _t(
                    "Verify this user by confirming the following number appears on their screen.",
                );
        } else {
            return <div>
                { _t("Unable to find a supported verification method.") }
                <AccessibleButton kind="primary" onClick={this.props.onCancel}>
                    { _t('Cancel') }
                </AccessibleButton>
            </div>;
        }

        let confirm;
        if (this.state.pending && this.props.isSelf) {
            let text;
            // device shouldn't be null in this situation but it can be, eg. if the device is
            // logged out during verification
            if (this.props.device) {
                text = _t("Waiting for you to verify on your other device, %(deviceName)s (%(deviceId)s)…", {
                    deviceName: this.props.device ? this.props.device.getDisplayName() : '',
                    deviceId: this.props.device ? this.props.device.deviceId : '',
                });
            } else {
                text = _t("Waiting for you to verify on your other device…");
            }
            confirm = <p>{ text }</p>;
        } else if (this.state.pending || this.state.cancelling) {
            let text;
            if (this.state.pending) {
                const { displayName } = this.props;
                text = _t("Waiting for %(displayName)s to verify…", { displayName });
            } else {
                text = _t("Cancelling…");
            }
            confirm = <PendingActionSpinner text={text} />;
        } else {
            confirm = <div className="mx_VerificationShowSas_buttonRow">
                <AccessibleButton onClick={this.onDontMatchClick} kind="danger">
                    { _t("They don't match") }
                </AccessibleButton>
                <AccessibleButton onClick={this.onMatchClick} kind="primary">
                    { _t("They match") }
                </AccessibleButton>
            </div>;
        }

        return <div className="mx_VerificationShowSas">
            <p>{ sasCaption }</p>
            { sasDisplay }
            <p>{ this.props.isSelf ?
                "":
                _t("To be secure, do this in person or use a trusted way to communicate.") }</p>
            { confirm }
        </div>;
    }
}

// List of Emoji strings from the js-sdk, for i18n
_td("Dog");
_td("Cat");
_td("Lion");
_td("Horse");
_td("Unicorn");
_td("Pig");
_td("Elephant");
_td("Rabbit");
_td("Panda");
_td("Rooster");
_td("Penguin");
_td("Turtle");
_td("Fish");
_td("Octopus");
_td("Butterfly");
_td("Flower");
_td("Tree");
_td("Cactus");
_td("Mushroom");
_td("Globe");
_td("Moon");
_td("Cloud");
_td("Fire");
_td("Banana");
_td("Apple");
_td("Strawberry");
_td("Corn");
_td("Pizza");
_td("Cake");
_td("Heart");
_td("Smiley");
_td("Robot");
_td("Hat");
_td("Glasses");
_td("Spanner");
_td("Santa");
_td("Thumbs up");
_td("Umbrella");
_td("Hourglass");
_td("Clock");
_td("Gift");
_td("Light bulb");
_td("Book");
_td("Pencil");
_td("Paperclip");
_td("Scissors");
_td("Lock");
_td("Key");
_td("Hammer");
_td("Telephone");
_td("Flag");
_td("Train");
_td("Bicycle");
_td("Aeroplane");
_td("Rocket");
_td("Trophy");
_td("Ball");
_td("Guitar");
_td("Trumpet");
_td("Bell");
_td("Anchor");
_td("Headphones");
_td("Folder");
_td("Pin");