/*
Copyright 2017 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 Modal from '../../../Modal';
import React from 'react';
import sdk from '../../../index';

import { _t, _td } from '../../../languageHandler';

/**
 * Dialog which asks the user whether they want to share their keys with
 * an unverified device.
 *
 * onFinished is called with `true` if the key should be shared, `false` if it
 * should not, and `undefined` if the dialog is cancelled. (In other words:
 * truthy: do the key share. falsy: don't share the keys).
 */
export default React.createClass({
    propTypes: {
        matrixClient: React.PropTypes.object.isRequired,
        userId: React.PropTypes.string.isRequired,
        deviceId: React.PropTypes.string.isRequired,
        onFinished: React.PropTypes.func.isRequired,
    },

    getInitialState: function() {
        return {
            deviceInfo: null,
            wasNewDevice: false,
        };
    },

    componentDidMount: function() {
        this._unmounted = false;
        const userId = this.props.userId;
        const deviceId = this.props.deviceId;

        // give the client a chance to refresh the device list
        this.props.matrixClient.downloadKeys([userId], false).then((r) => {
            if (this._unmounted) { return; }

            const deviceInfo = r[userId][deviceId];

            if(!deviceInfo) {
                console.warn(`No details found for device ${userId}:${deviceId}`);

                this.props.onFinished(false);
                return;
            }

            const wasNewDevice = !deviceInfo.isKnown();

            this.setState({
                deviceInfo: deviceInfo,
                wasNewDevice: wasNewDevice,
            });

            // if the device was new before, it's not any more.
            if (wasNewDevice) {
                this.props.matrixClient.setDeviceKnown(
                    userId,
                    deviceId,
                    true,
                );
            }
        }).done();
    },

    componentWillUnmount: function() {
        this._unmounted = true;
    },


    _onVerifyClicked: function() {
        const DeviceVerifyDialog = sdk.getComponent('views.dialogs.DeviceVerifyDialog');

        console.log("KeyShareDialog: Starting verify dialog");
        Modal.createTrackedDialog('Key Share', 'Starting dialog', DeviceVerifyDialog, {
            userId: this.props.userId,
            device: this.state.deviceInfo,
            onFinished: (verified) => {
                if (verified) {
                    // can automatically share the keys now.
                    this.props.onFinished(true);
                }
            },
        });
    },

    _onShareClicked: function() {
        console.log("KeyShareDialog: User clicked 'share'");
        this.props.onFinished(true);
    },

    _onIgnoreClicked: function() {
        console.log("KeyShareDialog: User clicked 'ignore'");
        this.props.onFinished(false);
    },

    _renderContent: function() {
        const displayName = this.state.deviceInfo.getDisplayName() ||
            this.state.deviceInfo.deviceId;

        let text;
        if (this.state.wasNewDevice) {
            text = _td("You added a new device '%(displayName)s', which is"
                + " requesting encryption keys.");
        } else {
            text = _td("Your unverified device '%(displayName)s' is requesting"
                + " encryption keys.");
        }
        text = _t(text, {displayName: displayName});

        return (
            <div>
                <p>{ text }</p>

                <div className="mx_Dialog_buttons">
                    <button onClick={this._onVerifyClicked}>
                        { _t('Start verification') }
                    </button>
                    <button onClick={this._onShareClicked}>
                        { _t('Share without verifying') }
                    </button>
                    <button onClick={this._onIgnoreClicked}>
                        { _t('Ignore request') }
                    </button>
                </div>
            </div>
        );
    },

    render: function() {
        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
        const Spinner = sdk.getComponent('views.elements.Spinner');

        let content;

        if (this.state.deviceInfo) {
            content = this._renderContent();
        } else {
            content = (
                <div>
                    <p>{ _t('Loading device info...') }</p>
                    <Spinner />
                </div>
            );
        }

        return (
            <BaseDialog className='mx_KeyShareRequestDialog'
                onFinished={this.props.onFinished}
                title={_t('Encryption key request')}
            >
                { content }
            </BaseDialog>
        );
    },
});