/*
Copyright 2018 New Vector 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 { _t } from '../../../languageHandler';
import Widgets from '../../../utils/widgets';
import AppTile from '../elements/AppTile';
import MatrixClientPeg from '../../../MatrixClientPeg';
import Modal from '../../../Modal';
import sdk from '../../../index';
import SdkConfig from '../../../SdkConfig';
import ScalarAuthClient from '../../../ScalarAuthClient';
import dis from '../../../dispatcher';
import AccessibleButton from '../elements/AccessibleButton';

const widgetType = 'm.stickerpicker';

export default class Stickerpicker extends React.Component {
    constructor(props) {
        super(props);
        this._onShowStickersClick = this._onShowStickersClick.bind(this);
        this._onHideStickersClick = this._onHideStickersClick.bind(this);
        this._launchManageIntegrations = this._launchManageIntegrations.bind(this);
        this._removeStickerpickerWidgets = this._removeStickerpickerWidgets.bind(this);
        this._onWidgetAction = this._onWidgetAction.bind(this);
        this._onResize = this._onResize.bind(this);
        this._onFinished = this._onFinished.bind(this);

        this._collectWidgetMessaging = this._collectWidgetMessaging.bind(this);

        this.popoverWidth = 300;
        this.popoverHeight = 300;

        this.state = {
            showStickers: false,
            imError: null,
            stickerpickerX: null,
            stickerpickerY: null,
            stickerpickerWidget: null,
            widgetId: null,
        };
    }

    _removeStickerpickerWidgets() {
        console.warn('Removing Stickerpicker widgets');
        if (this.state.widgetId) {
            this.scalarClient.disableWidgetAssets(widgetType, this.state.widgetId).then(() => {
                console.warn('Assets disabled');
            }).catch((err) => {
                console.error('Failed to disable assets');
            });
        } else {
            console.warn('No widget ID specified, not disabling assets');
        }

        this.setState({showStickers: false});
        Widgets.removeStickerpickerWidgets().then(() => {
            this.forceUpdate();
        }).catch((e) => {
            console.error('Failed to remove sticker picker widget', e);
        });
    }

    componentDidMount() {
        // Close the sticker picker when the window resizes
        window.addEventListener('resize', this._onResize);

        this.scalarClient = null;
        if (SdkConfig.get().integrations_ui_url && SdkConfig.get().integrations_rest_url) {
            this.scalarClient = new ScalarAuthClient();
            this.scalarClient.connect().then(() => {
                this.forceUpdate();
            }).catch((e) => {
                this._imError("Failed to connect to integrations server", e);
            });
        }

        if (!this.state.imError) {
            this.dispatcherRef = dis.register(this._onWidgetAction);
        }
        const stickerpickerWidget = Widgets.getStickerpickerWidgets()[0];
        this.setState({
            stickerpickerWidget,
            widgetId: stickerpickerWidget ? stickerpickerWidget.id : null,
        });
    }

    componentWillUnmount() {
        window.removeEventListener('resize', this._onResize);
        if (this.dispatcherRef) {
            dis.unregister(this.dispatcherRef);
        }
    }

    componentDidUpdate(prevProps, prevState) {
        this._sendVisibilityToWidget(this.state.showStickers);
    }

    _imError(errorMsg, e) {
        console.error(errorMsg, e);
        this.setState({
            showStickers: false,
            imError: errorMsg,
        });
    }

    _onWidgetAction(payload) {
        if (payload.action === "user_widget_updated") {
            this.forceUpdate();
        } else if (payload.action === "stickerpicker_close") {
            this.setState({showStickers: false});
        }
    }

    _defaultStickerpickerContent() {
        return (
            <AccessibleButton onClick={this._launchManageIntegrations}
                className='mx_Stickers_contentPlaceholder'>
                <p>{ _t("You don't currently have any stickerpacks enabled") }</p>
                <p className='mx_Stickers_addLink'>Add some now</p>
                <img src='img/stickerpack-placeholder.png' alt={_t('Add a stickerpack')} />
            </AccessibleButton>
        );
    }

    _errorStickerpickerContent() {
        return (
            <div style={{"text-align": "center"}} className="error">
                <p> { this.state.imError } </p>
            </div>
        );
    }

    _collectWidgetMessaging(widgetMessaging) {
        this._appWidgetMessaging = widgetMessaging;

        // Do this now instead of in componentDidMount because we might not have had the
        // reference to widgetMessaging when mounting
        this._sendVisibilityToWidget(true);
    }

    _sendVisibilityToWidget(visible) {
        if (this._appWidgetMessaging && visible !== this._prevSentVisibility) {
            this._appWidgetMessaging.sendVisibility(visible);
            this._prevSentVisibility = visible;
        }
    }

    _getStickerpickerContent() {
        // Handle Integration Manager errors
        if (this.state._imError) {
            return this._errorStickerpickerContent();
        }

        // Stickers
        // TODO - Add support for Stickerpickers from multiple app stores.
        // Render content from multiple stickerpack sources, each within their
        // own iframe, within the stickerpicker UI element.
        const stickerpickerWidget = this.state.stickerpickerWidget;
        let stickersContent;

        // Use a separate ReactDOM tree to render the AppTile separately so that it persists and does
        // not unmount when we (a) close the sticker picker (b) switch rooms. It's properties are still
        // updated.
        const PersistedElement = sdk.getComponent("elements.PersistedElement");

        // Load stickerpack content
        if (stickerpickerWidget && stickerpickerWidget.content && stickerpickerWidget.content.url) {
            // Set default name
            stickerpickerWidget.content.name = stickerpickerWidget.name || _t("Stickerpack");

            stickersContent = (
                <div className='mx_Stickers_content_container'>
                    <div
                        id='stickersContent'
                        className='mx_Stickers_content'
                        style={{
                            border: 'none',
                            height: this.popoverHeight,
                            width: this.popoverWidth,
                        }}
                    >
                    <PersistedElement>
                        <AppTile
                            collectWidgetMessaging={this._collectWidgetMessaging}
                            id={stickerpickerWidget.id}
                            url={stickerpickerWidget.content.url}
                            name={stickerpickerWidget.content.name}
                            room={this.props.room}
                            type={stickerpickerWidget.content.type}
                            fullWidth={true}
                            userId={stickerpickerWidget.sender || MatrixClientPeg.get().credentials.userId}
                            creatorUserId={MatrixClientPeg.get().credentials.userId}
                            waitForIframeLoad={true}
                            show={true}
                            showMenubar={true}
                            onEditClick={this._launchManageIntegrations}
                            onDeleteClick={this._removeStickerpickerWidgets}
                            showTitle={false}
                            showMinimise={true}
                            showDelete={false}
                            showPopout={false}
                            onMinimiseClick={this._onHideStickersClick}
                            handleMinimisePointerEvents={true}
                            whitelistCapabilities={['m.sticker', 'visibility']}
                        />
                    </PersistedElement>
                    </div>
                </div>
            );
        } else {
            // Default content to show if stickerpicker widget not added
            console.warn("No available sticker picker widgets");
            stickersContent = this._defaultStickerpickerContent();
        }
        return stickersContent;
    }

    /**
     * Show the sticker picker overlay
     * If no stickerpacks have been added, show a link to the integration manager add sticker packs page.
     * @param  {Event} e Event that triggered the function
     */
    _onShowStickersClick(e) {
        const buttonRect = e.target.getBoundingClientRect();

        // The window X and Y offsets are to adjust position when zoomed in to page
        const x = buttonRect.right + window.pageXOffset - 42;
        const y = (buttonRect.top + (buttonRect.height / 2) + window.pageYOffset) - 19;

        this.setState({
            showStickers: true,
            stickerPickerX: x,
            stickerPickerY: y,
        });
    }

    /**
     * Trigger hiding of the sticker picker overlay
     * @param  {Event} ev Event that triggered the function call
     */
    _onHideStickersClick(ev) {
        this.setState({showStickers: false});
    }

    /**
     * Called when the window is resized
     */
    _onResize() {
        this.setState({showStickers: false});
    }

    /**
     * The stickers picker was hidden
     */
    _onFinished() {
        this.setState({showStickers: false});
    }

    /**
     * Launch the integrations manager on the stickers integration page
     */
    _launchManageIntegrations() {
        const IntegrationsManager = sdk.getComponent("views.settings.IntegrationsManager");
        const src = (this.scalarClient !== null && this.scalarClient.hasCredentials()) ?
                this.scalarClient.getScalarInterfaceUrlForRoom(
                    this.props.room,
                    'type_' + widgetType,
                    this.state.widgetId,
                ) :
                null;
        Modal.createTrackedDialog('Integrations Manager', '', IntegrationsManager, {
            src: src,
        }, "mx_IntegrationsManager");

        this.setState({showStickers: false});
    }

    render() {
        const TintableSvg = sdk.getComponent("elements.TintableSvg");
        const ContextualMenu = sdk.getComponent('structures.ContextualMenu');
        const GenericElementContextMenu = sdk.getComponent('context_menus.GenericElementContextMenu');
        let stickersButton;

        const stickerPicker = <ContextualMenu
            elementClass={GenericElementContextMenu}
            chevronOffset={10}
            chevronFace={'bottom'}
            left={this.state.stickerPickerX}
            top={this.state.stickerPickerY}
            menuWidth={this.popoverWidth}
            menuHeight={this.popoverHeight}
            element={this._getStickerpickerContent()}
            onFinished={this._onFinished}
            menuPaddingTop={0}
            menuPaddingLeft={0}
            menuPaddingRight={0}
        />;

        if (this.state.showStickers) {
            // Show hide-stickers button
            stickersButton =
                <div
                    id='stickersButton'
                    key="controls_hide_stickers"
                    className="mx_MessageComposer_stickers mx_Stickers_hideStickers"
                    onClick={this._onHideStickersClick}
                    ref='target'
                    title={_t("Hide Stickers")}>
                    <TintableSvg src="img/icons-hide-stickers.svg" width="35" height="35" />
                </div>;
        } else {
            // Show show-stickers button
            stickersButton =
                <div
                    id='stickersButton'
                    key="constrols_show_stickers"
                    className="mx_MessageComposer_stickers"
                    onClick={this._onShowStickersClick}
                    title={_t("Show Stickers")}>
                    <TintableSvg src="img/icons-show-stickers.svg" width="35" height="35" />
                </div>;
        }
        return <div>
            {stickersButton}
            {this.state.showStickers && stickerPicker}
        </div>;
    }
}