/*
Copyright 2015 OpenMarket 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.
*/
var React = require('react');
var sdk = require('../../index');
var MatrixClientPeg = require("../../MatrixClientPeg");
var Modal = require('../../Modal');
var dis = require("../../dispatcher");
var q = require('q');
var version = require('../../../package.json').version;
var UserSettingsStore = require('../../UserSettingsStore');

module.exports = React.createClass({
    displayName: 'UserSettings',

    propTypes: {
        onClose: React.PropTypes.func
    },

    getDefaultProps: function() {
        return {
            onClose: function() {}
        };
    },

    getInitialState: function() {
        return {
            avatarUrl: null,
            threePids: [],
            clientVersion: version,
            phase: "UserSettings.LOADING", // LOADING, DISPLAY
        };
    },

    componentWillMount: function() {
        var self = this;

        q.all([
            UserSettingsStore.loadProfileInfo(), UserSettingsStore.loadThreePids()
        ]).done(function(resps) {
            self.setState({
                avatarUrl: resps[0].avatar_url,
                threepids: resps[1].threepids,
                phase: "UserSettings.DISPLAY",
            });

            // keep a copy of the original state in order to track changes
            self.setState({
                originalState: self.state
            });
        }, function(error) {
            var ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            Modal.createDialog(ErrorDialog, {
                title: "Can't load user settings",
                description: error.toString()
            });
        });
    },

    componentDidMount: function() {
        this.dispatcherRef = dis.register(this.onAction);
        this._me = MatrixClientPeg.get().credentials.userId;
    },

    componentWillUnmount: function() {
        dis.unregister(this.dispatcherRef);
    },

/*
    onSaveClicked: function(ev) { // XXX unused
        var self = this;
        var savePromises = [];

        // XXX: this is managed in ChangeAvatar.js, although could be moved out here in order
        // to allow for the change to be staged alongside the rest of the form.
        //
        // if (this.state.originalState.avatarUrl !== this.state.avatarUrl) {
        //     savePromises.push( UserSettingsStore.saveAvatarUrl(this.state.avatarUrl) );
        // }

        if (this.state.originalState.threepids.length !== this.state.threepids.length ||
                this.state.originalState.threepids.every((element, index) => {
                    return element === this.state.threepids[index];
                })) {
            savePromises.push(
                UserSettingsStore.saveThreePids(this.state.threepids)
            );
        }

        self.setState({
            phase: "UserSettings.SAVING",
        });

        q.all(savePromises).done(function(resps) {
            self.setState({
                phase: "UserSettings.DISPLAY",
            });
            self.props.onClose();
        }, function(error) {
            self.setState({
                phase: "UserSettings.DISPLAY",
            });
            var ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
            Modal.createDialog(ErrorDialog, {
                title: "Can't save user settings",
                description: error.toString()
            });
        });        
    }, */

    onAction: function(payload) {
        if (payload.action === "notifier_enabled") {
            this.setState({
                enableNotifications : UserSettingsStore.getEnableNotifications()
            });
        }
    }, 

    editAvatar: function() {
        var url = MatrixClientPeg.get().mxcUrlToHttp(this.state.avatarUrl);
        var ChangeAvatar = sdk.getComponent('settings.ChangeAvatar');
        var avatarDialog = (
            <div>
                <ChangeAvatar initialAvatarUrl={url} />
                <div className="mx_Dialog_buttons">
                    <button onClick={this.onAvatarDialogCancel}>Cancel</button>
                </div>
            </div>
        );
        this.avatarDialog = Modal.createDialogWithElement(avatarDialog);
    },

    onAvatarDialogCancel: function() {
        this.avatarDialog.close();
    },

    onLogoutClicked: function(ev) {
        var LogoutPrompt = sdk.getComponent('dialogs.LogoutPrompt');
        this.logoutModal = Modal.createDialog(
            LogoutPrompt, {onCancel: this.onLogoutPromptCancel}
        );
    },

    onPasswordChangeError: function(err) {
        var errMsg = err.error || "";
        if (err.httpStatus === 403) {
            errMsg = "Failed to change password. Is your password correct?";
        }
        else if (err.httpStatus) {
            errMsg += ` (HTTP status ${err.httpStatus})`;
        }
        var ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
        Modal.createDialog(ErrorDialog, {
            title: "Error",
            description: errMsg
        });
    },

    onPasswordChanged: function() {
        var ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
        Modal.createDialog(ErrorDialog, {
            title: "Success",
            description: `Your password was successfully changed. You will not
                          receive push notifications on other devices until you
                          log back in to them.`
        });
    },

    onLogoutPromptCancel: function() {
        this.logoutModal.closeDialog();
    },

    onEnableNotificationsChange: function(event) {
        // don't bother waiting for Save to be clicked, as that'd be silly
        UserSettingsStore.setEnableNotifications( this.refs.enableNotifications.value );
        this.setState({
            enableNotifications : UserSettingsStore.getEnableNotifications()
        });
    },

    render: function() {
        switch (this.state.phase) {
            case "UserSettings.LOADING":
                var Loader = sdk.getComponent("elements.Spinner");
                return (
                    <Loader />
                );
            case "UserSettings.DISPLAY":
                break; // quit the switch to return the common state
            default:
                throw new Error("Unknown state.phase => " + this.state.phase);
        }
        // can only get here if phase is UserSettings.DISPLAY
        var RoomHeader = sdk.getComponent('rooms.RoomHeader');
        var ChangeDisplayName = sdk.getComponent("views.settings.ChangeDisplayName");
        var ChangePassword = sdk.getComponent("views.settings.ChangePassword");

        return (
            <div className="mx_UserSettings">
                <RoomHeader simpleHeader="Settings" />

                <h2>Profile</h2>

                <div className="mx_UserSettings_section">
                    <div className="mx_UserSettings_profileTable">
                        <div className="mx_UserSettings_profileTableRow">
                            <div className="mx_UserSettings_profileLabelCell">
                                <label htmlFor="displayName">Display name</label>
                            </div>
                            <div className="mx_UserSettings_profileInputCell">
                                <ChangeDisplayName />
                            </div>
                        </div>

                        {this.state.threepids.map(function(val, pidIndex) {
                            var id = "email-" + val.address;
                            return (
                                <div className="mx_UserSettings_profileTableRow" key={pidIndex}>
                                    <div className="mx_UserSettings_profileLabelCell">
                                        <label htmlFor={id}>Email</label>
                                    </div>
                                    <div className="mx_UserSettings_profileInputCell">
                                        <input key={val.address} id={id} value={val.address} disabled />
                                    </div>
                                </div>
                            );
                        })}
                    </div>

                    <div className="mx_UserSettings_avatarPicker">
                        <div className="mx_UserSettings_avatarPicker_edit"
                            onClick={this.editAvatar}>
                        </div>
                    </div>
                </div>

                <h2>Account</h2>

                <div className="mx_UserSettings_section">
                    <ChangePassword
                        className="mx_UserSettings_profileTable"
                        rowClassName="mx_UserSettings_profileTableRow"
                        rowLabelClassName="mx_UserSettings_profileLabelCell"
                        rowInputClassName="mx_UserSettings_profileInputCell"
                        buttonClassName="mx_UserSettings_button"
                        onError={this.onPasswordChangeError}
                        onFinished={this.onPasswordChanged} />                   
                </div>

                <div className="mx_UserSettings_logout">
                    <div className="mx_UserSettings_button" onClick={this.onLogoutClicked}>
                        Log out
                    </div>
                </div>

                <h2>Notifications</h2>

                <div className="mx_UserSettings_section">
                    <div className="mx_UserSettings_notifTable">
                        <div className="mx_UserSettings_notifTableRow">
                            <div className="mx_UserSettings_notifInputCell">
                                <input id="enableNotifications"
                                    ref="enableNotifications"
                                    type="checkbox"
                                    checked={ this.state.enableNotifications }
                                    onChange={ this.onEnableNotificationsChange } />
                            </div>
                            <div className="mx_UserSettings_notifLabelCell">
                                <label htmlFor="enableNotifications">
                                    Enable desktop notifications
                                </label>
                            </div>
                        </div>
                    </div>
                </div>

                <h2>Advanced</h2>

                <div className="mx_UserSettings_section">
                    <div className="mx_UserSettings_advanced">
                        Logged in as {this._me}
                    </div>
                    <div className="mx_UserSettings_advanced">
                        Version {this.state.clientVersion}
                    </div>
                </div>
            </div>
        );
    }
});