/*
Copyright 2019 The Matrix.org Foundation C.I.C.

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 PropTypes from "prop-types";
import {_t, pickBestLanguage} from "../../../languageHandler";
import sdk from "../../..";

export default class InlineTermsAgreement extends React.Component {
    static propTypes = {
        policiesAndServicePairs: PropTypes.array.isRequired, // array of service/policy pairs
        agreedUrls: PropTypes.array.isRequired, // array of URLs the user has accepted
        onFinished: PropTypes.func.isRequired, // takes an argument of accepted URLs
        introElement: PropTypes.node,
    };

    constructor() {
        super();

        this.state = {
            policies: [],
            busy: false,
        };
    }

    componentDidMount() {
        // Build all the terms the user needs to accept
        const policies = []; // { checked, url, name }
        for (const servicePolicies of this.props.policiesAndServicePairs) {
            const availablePolicies = Object.values(servicePolicies.policies);
            for (const policy of availablePolicies) {
                const language = pickBestLanguage(Object.keys(policy).filter(p => p !== 'version'));
                const renderablePolicy = {
                    checked: false,
                    url: policy[language].url,
                    name: policy[language].name,
                };
                policies.push(renderablePolicy);
            }
        }

        this.setState({policies});
    }

    _togglePolicy = (index) => {
        const policies = JSON.parse(JSON.stringify(this.state.policies)); // deep & cheap clone
        policies[index].checked = !policies[index].checked;
        this.setState({policies});
    };

    _onContinue = () => {
        const hasUnchecked = !!this.state.policies.some(p => !p.checked);
        if (hasUnchecked) return;

        this.setState({busy: true});
        this.props.onFinished(this.state.policies.map(p => p.url));
    };

    _renderCheckboxes() {
        const rendered = [];
        for (let i = 0; i < this.state.policies.length; i++) {
            const policy = this.state.policies[i];
            const introText = _t(
                "Accept <policyLink /> to continue:", {}, {
                    policyLink: () => {
                        return (
                            <a href={policy.url} rel='noopener' target='_blank'>
                                {policy.name}
                                <span className='mx_InlineTermsAgreement_link' />
                            </a>
                        );
                    },
                },
            );
            rendered.push(
                <div key={i} className='mx_InlineTermsAgreement_cbContainer'>
                    <div>{introText}</div>
                    <div className='mx_InlineTermsAgreement_checkbox'>
                        <input type='checkbox' onChange={() => this._togglePolicy(i)} checked={policy.checked} />
                        {_t("Accept")}
                    </div>
                </div>,
            );
        }
        return rendered;
    }

    render() {
        const AccessibleButton = sdk.getComponent("views.elements.AccessibleButton");
        const hasUnchecked = !!this.state.policies.some(p => !p.checked);

        return (
            <div>
                {this.props.introElement}
                {this._renderCheckboxes()}
                <AccessibleButton
                    onClick={this._onContinue}
                    disabled={hasUnchecked || this.state.busy}
                    kind="primary_sm"
                >
                    {_t("Continue")}
                </AccessibleButton>
            </div>
        );
    }
}
