/*
Copyright 2018, 2019 New Vector Ltd
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 * as sdk from '../../../../index';
import {MatrixClientPeg} from '../../../../MatrixClientPeg';

import { _t } from '../../../../languageHandler';
import { Key } from "../../../../Keyboard";

/*
 * Access Secure Secret Storage by requesting the user's passphrase.
 */
export default class AccessSecretStorageDialog extends React.PureComponent {
    static propTypes = {
        // { passphrase, pubkey }
        keyInfo: PropTypes.object.isRequired,
        // Function from one of { passphrase, recoveryKey } -> boolean
        checkPrivateKey: PropTypes.func.isRequired,
    }

    constructor(props) {
        super(props);
        this.state = {
            recoveryKey: "",
            recoveryKeyValid: false,
            forceRecoveryKey: false,
            passPhrase: '',
            keyMatches: null,
        };
    }

    _onCancel = () => {
        this.props.onFinished(false);
    }

    _onUseRecoveryKeyClick = () => {
        this.setState({
            forceRecoveryKey: true,
        });
    }

    _onResetRecoveryClick = () => {
        this.props.onFinished(false);
        throw new Error("Resetting secret storage unimplemented");
    }

    _onRecoveryKeyChange = (e) => {
        this.setState({
            recoveryKey: e.target.value,
            recoveryKeyValid: MatrixClientPeg.get().isValidRecoveryKey(e.target.value),
            keyMatches: null,
        });
    }

    _onPassPhraseNext = async () => {
        this.setState({ keyMatches: null });
        const input = { passphrase: this.state.passPhrase };
        const keyMatches = await this.props.checkPrivateKey(input);
        if (keyMatches) {
            this.props.onFinished(input);
        } else {
            this.setState({ keyMatches });
        }
    }

    _onRecoveryKeyNext = async () => {
        this.setState({ keyMatches: null });
        const input = { recoveryKey: this.state.recoveryKey };
        const keyMatches = await this.props.checkPrivateKey(input);
        if (keyMatches) {
            this.props.onFinished(input);
        } else {
            this.setState({ keyMatches });
        }
    }

    _onPassPhraseChange = (e) => {
        this.setState({
            passPhrase: e.target.value,
            keyMatches: null,
        });
    }

    _onPassPhraseKeyPress = (e) => {
        if (e.key === Key.ENTER && this.state.passPhrase.length > 0) {
            this._onPassPhraseNext();
        }
    }

    _onRecoveryKeyKeyPress = (e) => {
        if (e.key === Key.ENTER && this.state.recoveryKeyValid) {
            this._onRecoveryKeyNext();
        }
    }

    render() {
        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');

        const hasPassphrase = (
            this.props.keyInfo &&
            this.props.keyInfo.passphrase &&
            this.props.keyInfo.passphrase.salt &&
            this.props.keyInfo.passphrase.iterations
        );

        let content;
        let title;
        if (hasPassphrase && !this.state.forceRecoveryKey) {
            const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
            const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
            title = _t("Enter secret storage passphrase");

            let keyStatus;
            if (this.state.keyMatches === false) {
                keyStatus = <div className="mx_AccessSecretStorageDialog_keyStatus">
                    {"\uD83D\uDC4E "}{_t(
                        "Unable to access secret storage. Please verify that you " +
                        "entered the correct passphrase.",
                    )}
                </div>;
            } else {
                keyStatus = <div className="mx_AccessSecretStorageDialog_keyStatus"></div>;
            }

            content = <div>
                <p>{_t(
                    "<b>Warning</b>: You should only access secret storage " +
                    "from a trusted computer.", {},
                    { b: sub => <b>{sub}</b> },
                )}</p>
                <p>{_t(
                    "Access your secure message history and your cross-signing " +
                    "identity for verifying other devices by entering your passphrase.",
                )}</p>

                <div className="mx_AccessSecretStorageDialog_primaryContainer">
                    <input type="password"
                        className="mx_AccessSecretStorageDialog_passPhraseInput"
                        onChange={this._onPassPhraseChange}
                        onKeyPress={this._onPassPhraseKeyPress}
                        value={this.state.passPhrase}
                        autoFocus={true}
                    />
                    {keyStatus}
                    <DialogButtons primaryButton={_t('Next')}
                        onPrimaryButtonClick={this._onPassPhraseNext}
                        hasCancel={true}
                        onCancel={this._onCancel}
                        focus={false}
                        primaryDisabled={this.state.passPhrase.length === 0}
                    />
                </div>
                {_t(
                    "If you've forgotten your passphrase you can "+
                    "<button1>use your recovery key</button1> or " +
                    "<button2>set up new recovery options</button2>."
                , {}, {
                    button1: s => <AccessibleButton className="mx_linkButton"
                        element="span"
                        onClick={this._onUseRecoveryKeyClick}
                    >
                        {s}
                    </AccessibleButton>,
                    button2: s => <AccessibleButton className="mx_linkButton"
                        element="span"
                        onClick={this._onResetRecoveryClick}
                    >
                        {s}
                    </AccessibleButton>,
                })}
            </div>;
        } else {
            title = _t("Enter secret storage recovery key");
            const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
            const AccessibleButton = sdk.getComponent('elements.AccessibleButton');

            let keyStatus;
            if (this.state.recoveryKey.length === 0) {
                keyStatus = <div className="mx_AccessSecretStorageDialog_keyStatus"></div>;
            } else if (this.state.recoveryKeyValid) {
                keyStatus = <div className="mx_AccessSecretStorageDialog_keyStatus">
                    {"\uD83D\uDC4D "}{_t("This looks like a valid recovery key!")}
                </div>;
            } else if (this.state.keyMatches === false) {
                keyStatus = <div className="mx_AccessSecretStorageDialog_keyStatus">
                    {"\uD83D\uDC4E "}{_t(
                        "Unable to access secret storage. Please verify that you " +
                        "entered the correct recovery key.",
                    )}
                </div>;
            } else {
                keyStatus = <div className="mx_AccessSecretStorageDialog_keyStatus">
                    {"\uD83D\uDC4E "}{_t("Not a valid recovery key")}
                </div>;
            }

            content = <div>
                <p>{_t(
                    "<b>Warning</b>: You should only access secret storage " +
                    "from a trusted computer.", {},
                    { b: sub => <b>{sub}</b> },
                )}</p>
                <p>{_t(
                    "Access your secure message history and your cross-signing " +
                    "identity for verifying other devices by entering your recovery key.",
                )}</p>

                <div className="mx_AccessSecretStorageDialog_primaryContainer">
                    <input className="mx_AccessSecretStorageDialog_recoveryKeyInput"
                        onChange={this._onRecoveryKeyChange}
                        onKeyPress={this._onRecoveryKeyKeyPress}
                        value={this.state.recoveryKey}
                        autoFocus={true}
                    />
                    {keyStatus}
                    <DialogButtons primaryButton={_t('Next')}
                        onPrimaryButtonClick={this._onRecoveryKeyNext}
                        hasCancel={true}
                        onCancel={this._onCancel}
                        focus={false}
                        primaryDisabled={!this.state.recoveryKeyValid}
                    />
                </div>
                {_t(
                    "If you've forgotten your recovery key you can "+
                    "<button>set up new recovery options</button>."
                , {}, {
                    button: s => <AccessibleButton className="mx_linkButton"
                        element="span"
                        onClick={this._onResetRecoveryClick}
                    >
                        {s}
                    </AccessibleButton>,
                })}
            </div>;
        }

        return (
            <BaseDialog className='mx_AccessSecretStorageDialog'
                onFinished={this.props.onFinished}
                title={title}
            >
            <div>
                {content}
            </div>
            </BaseDialog>
        );
    }
}