import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { addStep, removeStep, changeStepIndex } from '../../../actions/tutorialBuilderActions';

import clsx from 'clsx';

import Textfield from './Textfield';
import StepType from './StepType';
import BlocklyExample from './BlocklyExample';
import Requirements from './Requirements';
import Hardware from './Hardware';
import Media from './Media';

import { withStyles } from '@material-ui/core/styles';
import Typography from '@material-ui/core/Typography';
import IconButton from '@material-ui/core/IconButton';
import Tooltip from '@material-ui/core/Tooltip';

import { faPlus, faAngleDoubleUp, faAngleDoubleDown, faTrash } from "@fortawesome/free-solid-svg-icons";
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";

import MarkdownEditor from "./MarkdownEditor";

const styles = (theme) => ({
  button: {
    backgroundColor: theme.palette.primary.main,
    color: theme.palette.primary.contrastText,
    width: '40px',
    height: '40px',
    '&:hover': {
      backgroundColor: theme.palette.primary.main,
      color: theme.palette.primary.contrastText,
    }
  },
  delete: {
    backgroundColor: theme.palette.error.dark,
    color: theme.palette.error.contrastText,
    '&:hover': {
      backgroundColor: theme.palette.error.dark,
      color: theme.palette.error.contrastText,
    }
  }
});

class Step extends Component {

  render() {
    var index = this.props.index;
    var steps = this.props.steps;
    return (
      <div style={{ borderRadius: '25px', border: '1px solid lightgrey', padding: '10px 14px 10px 10px', marginBottom: '20px' }}>
        <Typography variant='h6' style={{ marginBottom: '10px', marginLeft: '4px' }}>Schritt {index + 1}</Typography>
        <div style={{ display: 'flex', position: 'relative' }}>
          <div style={{ width: '40px', marginRight: '10px', position: 'absolute', left: '4px', bottom: '10px' }}>
            <Tooltip title='Schritt hinzufügen' arrow>
              <IconButton
                className={this.props.classes.button}
                style={index === 0 ? {} : { marginBottom: '5px' }}
                onClick={() => this.props.addStep(index + 1)}
              >
                <FontAwesomeIcon icon={faPlus} size="xs" />
              </IconButton>
            </Tooltip>
            {index !== 0 ?
              <div>
                <Tooltip title={`Schritt ${index + 1} nach oben schieben`} arrow>
                  <IconButton
                    disabled={index < 2}
                    className={this.props.classes.button}
                    style={{ marginBottom: '5px' }}
                    onClick={() => this.props.changeStepIndex(index, index - 1)}
                  >
                    <FontAwesomeIcon icon={faAngleDoubleUp} size="xs" />
                  </IconButton>
                </Tooltip>
                <Tooltip title={`Schritt ${index + 1} nach unten schieben`} arrow>
                  <IconButton
                    disabled={index === steps.length - 1}
                    className={this.props.classes.button}
                    style={{ marginBottom: '5px' }}
                    onClick={() => this.props.changeStepIndex(index, index + 1)}
                  >
                    <FontAwesomeIcon icon={faAngleDoubleDown} size="xs" />
                  </IconButton>
                </Tooltip>
                <Tooltip title={`Schritt ${index + 1} löschen`} arrow>
                  <IconButton
                    disabled={index === 0}
                    className={clsx(this.props.classes.button, this.props.classes.delete)}
                    onClick={() => this.props.removeStep(index)}
                  >
                    <FontAwesomeIcon icon={faTrash} size="xs" />
                  </IconButton>
                </Tooltip>
              </div>
              : null}
          </div>
          <div style={{ width: '100%', marginLeft: '54px' }}>
            <StepType value={this.props.step.type} index={index} />
            <Textfield
              value={this.props.step.headline}
              property={"headline"}
              label={"Überschrift"}
              index={index}
              error={this.props.error.steps[index].headline}
              errorText={`Gib eine Überschrift für die ${this.props.step.type === "task" ? "Aufgabe" : "Anleitung"
                } ein.`}
            />
            <MarkdownEditor
              value={this.props.step.text}
              property={"text"}
              label={
                this.props.step.type === "task"
                  ? "Aufgabenstellung"
                  : "Instruktionen"
              }
              index={index}
              multiline
              error={this.props.error.steps[index].text}
              errorText={`Gib Instruktionen für die ${this.props.step.type === "task" ? "Aufgabe" : "Anleitung"
                } ein.`}
            />
            {index === 0 ?
              <div>
                <Requirements value={this.props.step.requirements ? this.props.step.requirements : []} index={index} />
                <Hardware value={this.props.step.hardware ? this.props.step.hardware : []} index={index} error={this.props.error.steps[index].hardware} />
              </div>
              : null}
            {this.props.step.type === 'instruction' ?
              <Media value={this.props.step.media} picture={this.props.step.media && this.props.step.media.picture} youtube={this.props.step.media && this.props.step.media.youtube} url={this.props.step.url} index={index} error={this.props.error.steps[index].media} />
              : null}
            <BlocklyExample value={this.props.step.xml} index={index} task={this.props.step.type === 'task'} error={this.props.error.steps[index].xml ? true : false} />
          </div>
        </div>
      </div>
    );
  };
}

Step.propTypes = {
  addStep: PropTypes.func.isRequired,
  removeStep: PropTypes.func.isRequired,
  changeStepIndex: PropTypes.func.isRequired,
  steps: PropTypes.array.isRequired,
  change: PropTypes.number.isRequired,
  error: PropTypes.object.isRequired,
};

const mapStateToProps = state => ({
  steps: state.builder.steps,
  change: state.builder.change,
  error: state.builder.error
});

export default connect(mapStateToProps, { addStep, removeStep, changeStepIndex })(withStyles(styles, { withTheme: true })(Step));