// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

import React, { Component } from 'react';
import { observer } from 'mobx-react';

import { api } from '../parity';
import DappsStore from '../dappsStore';
import ModalStore from '../modalStore';

import Button from '../Button';
import Modal from '../Modal';

import styles from '../Modal/modal.css';

const HEADERS = [
  'Error During Deletion',
  'Confirm Application Deletion',
  'Waiting for Signer Confirmation',
  'Waiting for Transaction Receipt',
  'Deletion Completed'
];
const STEP_ERROR = 0;
const STEP_CONFIRM = 1;
const STEP_SIGNER = 2;
const STEP_TXRECEIPT = 3;
const STEP_DONE = 4;

@observer
export default class ModalDelete extends Component {
  dappsStore = DappsStore.instance();
  modalStore = ModalStore.instance();

  render () {
    if (!this.modalStore.showingDelete) {
      return null;
    }

    return (
      <Modal
        buttons={ this.renderButtons() }
        error={ this.modalStore.errorDelete }
        header={ HEADERS[this.modalStore.stepDelete] }>
        { this.renderStep() }
      </Modal>
    );
  }

  renderButtons () {
    switch (this.modalStore.stepDelete) {
      case STEP_ERROR:
      case STEP_DONE:
        return [
          <Button
            key='close'
            label='Close'
            onClick={ this.onClickClose } />
        ];
      case STEP_CONFIRM:
        return [
          <Button
            key='cancel'
            label='No, Cancel'
            onClick={ this.onClickClose } />,
          <Button
            key='delete'
            label='Yes, Delete'
            warning
            onClick={ this.onClickYes } />
        ];
      default:
        return null;
    }
  }

  renderStep () {
    switch (this.modalStore.stepDelete) {
      case STEP_CONFIRM:
        return this.renderStepConfirm();
      case STEP_SIGNER:
        return this.renderStepWait('Waiting for transaction confirmation in the Parity secure signer');
      case STEP_TXRECEIPT:
        return this.renderStepWait('Waiting for the transaction receipt from the network');
      case STEP_DONE:
        return this.renderStepCompleted();
      default:
        return null;
    }
  }

  renderStepCompleted () {
    return (
      <div>
        <div className={ styles.section }>
          Your application has been removed from the registry.
        </div>
      </div>
    );
  }

  renderStepConfirm () {
    return (
      <div>
        <div className={ styles.section }>
          You are about to remove a distributed application from the registry, the details of this application is given below. Removal does not return any fees, however the application will not be available to users anymore.
        </div>
        <div className={ styles.section }>
          <div className={ styles.heading }>
            Owner account
          </div>
          <div className={ styles.account }>
            <img src={ api.util.createIdentityImg(this.dappsStore.currentApp.owner, 3) } />
            <div>{ this.dappsStore.currentApp.ownerName }</div>
            <div className={ styles.address }>{ this.dappsStore.currentApp.owner }</div>
          </div>
        </div>
        <div className={ styles.section }>
          <div className={ styles.heading }>
            Application identifier
          </div>
          <div>
            { this.dappsStore.currentApp.id }
          </div>
        </div>
      </div>
    );
  }

  renderStepWait (waitingFor) {
    return (
      <div>
        <div className={ styles.section }>
          { waitingFor }
        </div>
      </div>
    );
  }

  onClickClose = () => {
    this.modalStore.hideDelete();
  }

  onClickYes = () => {
    this.modalStore.doDelete();
  }
}