import React from 'react';
import CharacterCounter from './character_counter';
import Button from '../../../components/button';
import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import ReplyIndicatorContainer from '../containers/reply_indicator_container';
import AutosuggestTextarea from '../../../components/autosuggest_textarea';
import AutosuggestInput from '../../../components/autosuggest_input';
import PollButtonContainer from '../containers/poll_button_container';
import UploadButtonContainer from '../containers/upload_button_container';
import { defineMessages, injectIntl } from 'react-intl';
import SpoilerButtonContainer from '../containers/spoiler_button_container';
import PrivacyDropdownContainer from '../containers/privacy_dropdown_container';
import EmojiPickerDropdown from '../containers/emoji_picker_dropdown_container';
import PollFormContainer from '../containers/poll_form_container';
import UploadFormContainer from '../containers/upload_form_container';
import WarningContainer from '../containers/warning_container';
import { isMobile } from '../../../is_mobile';
import ImmutablePureComponent from 'react-immutable-pure-component';
import { length } from 'stringz';
import { countableText } from '../util/counter';
import Icon from 'mastodon/components/icon';
import snarkdown from 'snarkdown';
import DOMPurify from 'dompurify';

// import elephantUIPlane from '../../../images/elephant_ui_plane.svg';
// import { mascot } from '../../initial_state';

const allowedAroundShortCode = '><\u0085\u0020\u00a0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000\u2028\u2029\u0009\u000a\u000b\u000c\u000d';

const messages = defineMessages({
  placeholder        : { id: 'compose_form.placeholder', defaultMessage: 'What is on your mind?' },
  spoiler_placeholder: { id: 'compose_form.spoiler_placeholder', defaultMessage: 'Write your warning here' },
  publish            : { id: 'compose_form.publish', defaultMessage: 'Toot' },
  publishLoud        : { id: 'compose_form.publish_loud', defaultMessage: '{publish}!' },
});

export default @injectIntl
class ComposeForm extends ImmutablePureComponent {

  textMarkdownConverted = '';

  static contextTypes = {
    router: PropTypes.object,
  };

  static propTypes = {
    intl                 : PropTypes.object.isRequired,
    text                 : PropTypes.string.isRequired,
    textMarkdownConverted: PropTypes.string,
    suggestions          : ImmutablePropTypes.list,
    spoiler              : PropTypes.bool,
    privacy              : PropTypes.string,
    spoilerText          : PropTypes.string,
    focusDate            : PropTypes.instanceOf(Date),
    caretPosition        : PropTypes.number,
    maxTootCharsLimit    : PropTypes.number,
    preselectDate        : PropTypes.instanceOf(Date),
    isSubmitting         : PropTypes.bool,
    isChangingUpload     : PropTypes.bool,
    isUploading          : PropTypes.bool,
    onChange             : PropTypes.func.isRequired,
    onSubmit             : PropTypes.func.isRequired,
    onClearSuggestions   : PropTypes.func.isRequired,
    onFetchSuggestions   : PropTypes.func.isRequired,
    onSuggestionSelected : PropTypes.func.isRequired,
    onChangeSpoilerText  : PropTypes.func.isRequired,
    onPaste              : PropTypes.func.isRequired,
    onPickEmoji          : PropTypes.func.isRequired,
    showSearch           : PropTypes.bool,
    anyMedia             : PropTypes.bool,
    singleColumn         : PropTypes.bool,
  };

  static defaultProps = {
    showSearch       : false,
    maxTootCharsLimit: 7777,
    text: '# salut les bibous\n' +
      '\n' +
      'hé ouais',
  };

  handleChange = (e) => {
    this.props.onChange(e.target.value);
  };

  handleKeyDown = (e) => {
    let markdownConverted = this.convertMarkdown(this.props.text);
    console.log('markdownConverted', markdownConverted);
    this.render();
    if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
      this.handleSubmit();
    }

  };

  getFulltextForCharacterCounting = () => {
    return [this.props.spoiler ? this.props.spoilerText : '', countableText(this.props.text)].join('');
  };

  canSubmit = () => {
    const { isSubmitting, isChangingUpload, isUploading, anyMedia } = this.props;
    const fulltext = this.getFulltextForCharacterCounting();
    const isOnlyWhitespace = fulltext.length !== 0 && fulltext.trim().length === 0;

    return !(isSubmitting || isUploading || isChangingUpload || length(fulltext) > 500 || (isOnlyWhitespace && !anyMedia));
  };

  handleSubmit = () => {
    if (this.props.text !== this.autosuggestTextarea.textarea.value) {
      // Something changed the text inside the textarea (e.g. browser extensions like Grammarly)
      // Update the state to match the current text
      this.props.onChange(this.autosuggestTextarea.textarea.value);
    }

    if (!this.canSubmit()) {
      return;
    }

    this.props.onSubmit(this.context.router ? this.context.router.history : null);
  };

  onSuggestionsClearRequested = () => {
    this.props.onClearSuggestions();
  };

  onSuggestionsFetchRequested = (token) => {
    this.props.onFetchSuggestions(token);
  };

  onSuggestionSelected = (tokenStart, token, value) => {
    this.props.onSuggestionSelected(tokenStart, token, value, ['text']);
  };

  onSpoilerSuggestionSelected = (tokenStart, token, value) => {
    this.props.onSuggestionSelected(tokenStart, token, value, ['spoiler_text']);
  };

  handleChangeSpoilerText = (e) => {
    this.props.onChangeSpoilerText(e.target.value);
  };

  handleFocus = () => {
    if (this.composeForm && !this.props.singleColumn) {
      const { left, right } = this.composeForm.getBoundingClientRect();
      if (left < 0 || right > (window.innerWidth || document.documentElement.clientWidth)) {
        this.composeForm.scrollIntoView();
      }
    }
  };

  componentDidUpdate(prevProps) {
    // This statement does several things:
    // - If we're beginning a reply, and,
    //     - Replying to zero or one users, places the cursor at the end of the textbox.
    //     - Replying to more than one user, selects any usernames past the first;
    //       this provides a convenient shortcut to drop everyone else from the conversation.
    if (this.props.focusDate !== prevProps.focusDate) {
      let selectionEnd, selectionStart;

      if (this.props.preselectDate !== prevProps.preselectDate) {
        selectionEnd = this.props.text.length;
        selectionStart = this.props.text.search(/\s/) + 1;
      } else if (typeof this.props.caretPosition === 'number') {
        selectionStart = this.props.caretPosition;
        selectionEnd = this.props.caretPosition;
      } else {
        selectionEnd = this.props.text.length;
        selectionStart = selectionEnd;
      }

      this.autosuggestTextarea.textarea.setSelectionRange(selectionStart, selectionEnd);
      this.autosuggestTextarea.textarea.focus();
    } else if (prevProps.isSubmitting && !this.props.isSubmitting) {
      this.autosuggestTextarea.textarea.focus();
    } else if (this.props.spoiler !== prevProps.spoiler) {
      if (this.props.spoiler) {
        this.spoilerText.input.focus();
      } else {
        this.autosuggestTextarea.textarea.focus();
      }
    }
  }

  setAutosuggestTextarea = (c) => {
    this.autosuggestTextarea = c;
  };

  setSpoilerText = (c) => {
    this.spoilerText = c;
  };

  setRef = c => {
    this.composeForm = c;
  };

  handleEmojiPick = (data) => {
    const { text } = this.props;
    const position = this.autosuggestTextarea.textarea.selectionStart;
    const needsSpace = data.custom && position > 0 && !allowedAroundShortCode.includes(text[position - 1]);

    this.props.onPickEmoji(position, data, needsSpace);
  };

  convertMarkdown(markdownInput) {
    let md = `# title ouane
* aaaaaa
* bbbbbb
* cccccc
aaaaa

## title deux
deuuuux

### title trois

_this_ is **easy** to \` use\`. 

* aaaaaa
* bbbbbb
* cccccc

un lien vers [[www.wikipedia.org]]
[un lien vers cipherbliss.com](https://cipherbliss.com)
    `;
    let html = '';
    if (!markdownInput) {
      html = snarkdown(md);
    } else {
      html = snarkdown(markdownInput);
      // html = DOMPurify.sanitize(markdownInput);
    }
    this.textMarkdownConverted = html;
    return html;
  };

  render() {
    const { intl, onPaste, showSearch } = this.props;
    const disabled = this.props.isSubmitting;
    let publishText = '';

    if (this.props.privacy === 'private' || this.props.privacy === 'direct') {
      publishText =
        <span className='compose-form__publish-private'><Icon id='lock' /> {intl.formatMessage(messages.publish)}</span >;
    } else {
      publishText = this.props.privacy !== 'unlisted' ? intl.formatMessage(messages.publishLoud, { publish: intl.formatMessage(messages.publish) }) : intl.formatMessage(messages.publish);
    }

    return (
      <div className='compose-form'>
        <WarningContainer />

        <ReplyIndicatorContainer />

        <div
          className={`spoiler-input ${this.props.spoiler ? 'spoiler-input--visible' : ''}`}
          ref={this.setRef}
        >
          <AutosuggestInput
            placeholder={intl.formatMessage(messages.spoiler_placeholder)}
            value={this.props.spoilerText}
            onChange={this.handleChangeSpoilerText}
            onKeyDown={this.handleKeyDown}
            disabled={!this.props.spoiler}
            ref={this.setSpoilerText}
            suggestions={this.props.suggestions}
            onSuggestionsFetchRequested={this.onSuggestionsFetchRequested}
            onSuggestionsClearRequested={this.onSuggestionsClearRequested}
            onSuggestionSelected={this.onSpoilerSuggestionSelected}
            searchTokens={[':']}
            id='cw-spoiler-input'
            className='spoiler-input__input'
          />
        </div >

        <AutosuggestTextarea
          ref={this.setAutosuggestTextarea}
          placeholder={intl.formatMessage(messages.placeholder)}
          disabled={disabled}
          value={this.props.text}
          onChange={this.handleChange}
          suggestions={this.props.suggestions}
          onFocus={this.handleFocus}
          onKeyDown={this.handleKeyDown}
          onSuggestionsFetchRequested={this.onSuggestionsFetchRequested}
          onSuggestionsClearRequested={this.onSuggestionsClearRequested}
          onSuggestionSelected={this.onSuggestionSelected}
          onPaste={onPaste}
          autoFocus={!showSearch && !isMobile(window.innerWidth)}
        >
          <EmojiPickerDropdown onPickEmoji={this.handleEmojiPick} />
          <div className='compose-form__modifiers'>
            <UploadFormContainer />
            <PollFormContainer />
          </div >
        </AutosuggestTextarea >

        <div className='compose-form__buttons-wrapper'>
          <div className='compose-form__buttons'>
            <UploadButtonContainer />
            <PollButtonContainer />
            <PrivacyDropdownContainer />
            <SpoilerButtonContainer />
          </div >
          <div className='character-counter__wrapper'><CharacterCounter
            max={this.props.maxTootCharsLimit}
            text={this.getFulltextForCharacterCounting()}
          /></div >
        </div >

        <div className='compose-form__publish'>
          <div className='compose-form__publish-button-wrapper'><Button
            text={publishText}
            onClick={this.handleSubmit}
            disabled={!this.canSubmit()}
            block
          /></div >
        </div >

        {this.textMarkdownConverted &&

          <div className='preview formatted-markdown'>
            <h1>Markdown:</h1>
          <div
          dangerouslySetInnerHTML={{
          __html: this.textMarkdownConverted,
        }}
          >
          </div >
          </div >

        }

      </div >
    );
  };

}