/*
Copyright 2019 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, {createRef} from 'react';
import {_t} from "../../../languageHandler";
import {MatrixClientPeg} from "../../../MatrixClientPeg";
import Field from "../elements/Field";
import {User} from "matrix-js-sdk";
import { getHostingLink } from '../../../utils/HostingLink';
import * as sdk from "../../../index";

export default class ProfileSettings extends React.Component {
    constructor() {
        super();

        const client = MatrixClientPeg.get();
        let user = client.getUser(client.getUserId());
        if (!user) {
            // XXX: We shouldn't have to do this.
            // There seems to be a condition where the User object won't exist until a room
            // exists on the account. To work around this, we'll just create a temporary User
            // and use that.
            console.warn("User object not found - creating one for ProfileSettings");
            user = new User(client.getUserId());
        }
        let avatarUrl = user.avatarUrl;
        if (avatarUrl) avatarUrl = client.mxcUrlToHttp(avatarUrl, 96, 96, 'crop', false);
        this.state = {
            userId: user.userId,
            originalDisplayName: user.displayName,
            displayName: user.displayName,
            originalAvatarUrl: avatarUrl,
            avatarUrl: avatarUrl,
            avatarFile: null,
            enableProfileSave: false,
        };

        this._avatarUpload = createRef();
    }

    _uploadAvatar = () => {
        this._avatarUpload.current.click();
    };

    _removeAvatar = () => {
        // clear file upload field so same file can be selected
        this._avatarUpload.current.value = "";
        this.setState({
            avatarUrl: undefined,
            avatarFile: undefined,
            enableProfileSave: true,
        });
    };

    _saveProfile = async (e) => {
        e.stopPropagation();
        e.preventDefault();

        if (!this.state.enableProfileSave) return;
        this.setState({enableProfileSave: false});

        const client = MatrixClientPeg.get();
        const newState = {};

        // TODO: What do we do about errors?

        if (this.state.originalDisplayName !== this.state.displayName) {
            await client.setDisplayName(this.state.displayName);
            newState.originalDisplayName = this.state.displayName;
        }

        if (this.state.avatarFile) {
            const uri = await client.uploadContent(this.state.avatarFile);
            await client.setAvatarUrl(uri);
            newState.avatarUrl = client.mxcUrlToHttp(uri, 96, 96, 'crop', false);
            newState.originalAvatarUrl = newState.avatarUrl;
            newState.avatarFile = null;
        } else if (this.state.originalAvatarUrl !== this.state.avatarUrl) {
            await client.setAvatarUrl(""); // use empty string as Synapse 500s on undefined
        }

        this.setState(newState);
    };

    _onDisplayNameChanged = (e) => {
        this.setState({
            displayName: e.target.value,
            enableProfileSave: true,
        });
    };

    _onAvatarChanged = (e) => {
        if (!e.target.files || !e.target.files.length) {
            this.setState({
                avatarUrl: this.state.originalAvatarUrl,
                avatarFile: null,
                enableProfileSave: false,
            });
            return;
        }

        const file = e.target.files[0];
        const reader = new FileReader();
        reader.onload = (ev) => {
            this.setState({
                avatarUrl: ev.target.result,
                avatarFile: file,
                enableProfileSave: true,
            });
        };
        reader.readAsDataURL(file);
    };

    render() {
        const hostingSignupLink = getHostingLink('user-settings');
        let hostingSignup = null;
        if (hostingSignupLink) {
            hostingSignup = <span className="mx_ProfileSettings_hostingSignup">
                {_t(
                    "<a>Upgrade</a> to your own domain", {},
                    {
                        a: sub => <a href={hostingSignupLink} target="_blank" rel="noreferrer noopener">{sub}</a>,
                    },
                )}
                <a href={hostingSignupLink} target="_blank" rel="noreferrer noopener">
                    <img src={require("../../../../res/img/external-link.svg")} width="11" height="10" alt='' />
                </a>
            </span>;
        }

        const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
        const AvatarSetting = sdk.getComponent('settings.AvatarSetting');
        return (
            <form onSubmit={this._saveProfile} autoComplete="off" noValidate={true}>
                <input type="file" ref={this._avatarUpload} className="mx_ProfileSettings_avatarUpload"
                       onChange={this._onAvatarChanged} accept="image/*" />
                <div className="mx_ProfileSettings_profile">
                    <div className="mx_ProfileSettings_controls">
                        <p>
                            {this.state.userId}
                            {hostingSignup}
                        </p>
                        <Field id="profileDisplayName" label={_t("Display Name")}
                               type="text" value={this.state.displayName} autoComplete="off"
                               onChange={this._onDisplayNameChanged} />
                    </div>
                    <AvatarSetting
                        avatarUrl={this.state.avatarUrl}
                        avatarName={this.state.displayName || this.state.userId}
                        avatarAltText={_t("Profile picture")}
                        uploadAvatar={this._uploadAvatar}
                        removeAvatar={this._removeAvatar} />
                </div>
                <AccessibleButton onClick={this._saveProfile} kind="primary"
                                  disabled={!this.state.enableProfileSave}>
                    {_t("Save")}
                </AccessibleButton>
            </form>
        );
    }
}