text: 'use strict';
  
  const color = require('kleur');
  
  const _require = require('sisteransi'),
        cursor = _require.cursor;
  
  const Prompt = require('./prompt');
  
  const _require2 = require('../util'),
        clear = _require2.clear,
        figures = _require2.figures,
        style = _require2.style,
        wrap = _require2.wrap,
        entriesToDisplay = _require2.entriesToDisplay;
  /**
   * MultiselectPrompt Base Element
   * @param {Object} opts Options
   * @param {String} opts.message Message
   * @param {Array} opts.choices Array of choice objects
   * @param {String} [opts.hint] Hint to display
   * @param {String} [opts.warn] Hint shown for disabled choices
   * @param {Number} [opts.max] Max choices
   * @param {Number} [opts.cursor=0] Cursor start position
   * @param {Number} [opts.optionsPerPage=10] Max options to display at once
   * @param {Stream} [opts.stdin] The Readable stream to listen to
   * @param {Stream} [opts.stdout] The Writable stream to write readline data to
   */
  
  
  class MultiselectPrompt extends Prompt {
    constructor(opts = {}) {
      super(opts);
      this.msg = opts.message;
      this.cursor = opts.cursor || 0;
      this.scrollIndex = opts.cursor || 0;
      this.hint = opts.hint || '';
      this.warn = opts.warn || '- This option is disabled -';
      this.minSelected = opts.min;
      this.showMinError = false;
      this.maxChoices = opts.max;
      this.instructions = opts.instructions;
      this.optionsPerPage = opts.optionsPerPage || 10;
      this.value = opts.choices.map((ch, idx) => {
        if (typeof ch === 'string') ch = {
          title: ch,
          value: idx
        };
        return {
          title: ch && (ch.title || ch.value || ch),
          description: ch && ch.description,
          value: ch && (ch.value === undefined ? idx : ch.value),
          selected: ch && ch.selected,
          disabled: ch && ch.disabled
        };
      });
      this.clear = clear('');
  
      if (!opts.overrideRender) {
        this.render();
      }
    }
  
    reset() {
      this.value.map(v => !v.selected);
      this.cursor = 0;
      this.fire();
      this.render();
    }
  
    selected() {
      return this.value.filter(v => v.selected);
    }
  
    abort() {
      this.done = this.aborted = true;
      this.fire();
      this.render();
      this.out.write('\n');
      this.close();
    }
  
    submit() {
      const selected = this.value.filter(e => e.selected);
  
      if (this.minSelected && selected.length < this.minSelected) {
        this.showMinError = true;
        this.render();
      } else {
        this.done = true;
        this.aborted = false;
        this.fire();
        this.render();
        this.out.write('\n');
        this.close();
      }
    }
  
    first() {
      this.cursor = 0;
      this.render();
    }
  
    last() {
      this.cursor = this.value.length - 1;
      this.render();
    }
  
    next() {
      this.cursor = (this.cursor + 1) % this.value.length;
      this.render();
    }
  
    up() {
      if (this.cursor === 0) {
        this.cursor = this.value.length - 1;
      } else {
        this.cursor--;
      }
  
      this.render();
    }
  
    down() {
      if (this.cursor === this.value.length - 1) {
        this.cursor = 0;
      } else {
        this.cursor++;
      }
  
      this.render();
    }
  
    left() {
      this.value[this.cursor].selected = false;
      this.render();
    }
  
    right() {
      if (this.value.filter(e => e.selected).length >= this.maxChoices) return this.bell();
      this.value[this.cursor].selected = true;
      this.render();
    }
  
    handleSpaceToggle() {
      const v = this.value[this.cursor];
  
      if (v.selected) {
        v.selected = false;
        this.render();
      } else if (v.disabled || this.value.filter(e => e.selected).length >= this.maxChoices) {
        return this.bell();
      } else {
        v.selected = true;
        this.render();
      }
    }
  
    toggleAll() {
      if (this.maxChoices !== undefined || this.value[this.cursor].disabled) {
        return this.bell();
      }
  
      const newSelected = !this.value[this.cursor].selected;
      this.value.filter(v => !v.disabled).forEach(v => v.selected = newSelected);
      this.render();
    }
  
    _(c, key) {
      if (c === ' ') {
        this.handleSpaceToggle();
      } else if (c === 'a') {
        this.toggleAll();
      } else {
        return this.bell();
      }
    }
  
    renderInstructions() {
      if (this.instructions === undefined || this.instructions) {
        if (typeof this.instructions === 'string') {
          return this.instructions;
        }
  
        return '\nInstructions:\n' + `    ${figures.arrowUp}/${figures.arrowDown}: Highlight option\n` + `    ${figures.arrowLeft}/${figures.arrowRight}/[space]: Toggle selection\n` + (this.maxChoices === undefined ? `    a: Toggle all\n` : '') + `    enter/return: Complete answer`;
      }
  
      return '';
    }
  
    renderOption(cursor, v, i, arrowIndicator) {
      const prefix = (v.selected ? color.green(figures.radioOn) : figures.radioOff) + ' ' + arrowIndicator + ' ';
      let title, desc;
  
      if (v.disabled) {
        title = cursor === i ? color.gray().underline(v.title) : color.strikethrough().gray(v.title);
      } else {
        title = cursor === i ? color.cyan().underline(v.title) : v.title;
  
        if (cursor === i && v.description) {
          desc = ` - ${v.description}`;
  
          if (prefix.length + title.length + desc.length >= this.out.columns || v.description.split(/\r?\n/).length > 1) {
            desc = '\n' + wrap(v.description, {
              margin: prefix.length,
              width: this.out.columns
            });
          }
        }
      }
  
      return prefix + title + color.gray(desc || '');
    } // shared with autocompleteMultiselect
  
  
    paginateOptions(options) {
      if (options.length === 0) {
        return color.red('No matches for this query.');
      }
  
      let _entriesToDisplay = entriesToDisplay(this.cursor, options.length, this.optionsPerPage),
          startIndex = _entriesToDisplay.startIndex,
          endIndex = _entriesToDisplay.endIndex;
  
      let prefix,
          styledOptions = [];
  
      for (let i = startIndex; i < endIndex; i++) {
        if (i === startIndex && startIndex > 0) {
          prefix = figures.arrowUp;
        } else if (i === endIndex - 1 && endIndex < options.length) {
          prefix = figures.arrowDown;
        } else {
          prefix = ' ';
        }
  
        styledOptions.push(this.renderOption(this.cursor, options[i], i, prefix));
      }
  
      return '\n' + styledOptions.join('\n');
    } // shared with autocomleteMultiselect
  
  
    renderOptions(options) {
      if (!this.done) {
        return this.paginateOptions(options);
      }
  
      return '';
    }
  
    renderDoneOrInstructions() {
      if (this.done) {
        return this.value.filter(e => e.selected).map(v => v.title).join(', ');
      }
  
      const output = [color.gray(this.hint), this.renderInstructions()];
  
      if (this.value[this.cursor].disabled) {
        output.push(color.yellow(this.warn));
      }
  
      return output.join(' ');
    }
  
    render() {
      if (this.closed) return;
      if (this.firstRender) this.out.write(cursor.hide);
      super.render(); // print prompt
  
      let prompt = [style.symbol(this.done, this.aborted), color.bold(this.msg), style.delimiter(false), this.renderDoneOrInstructions()].join(' ');
  
      if (this.showMinError) {
        prompt += color.red(`You must select a minimum of ${this.minSelected} choices.`);
        this.showMinError = false;
      }
  
      prompt += this.renderOptions(this.value);
      this.out.write(this.clear + prompt);
      this.clear = clear(prompt);
    }
  
  }
  
  module.exports = MultiselectPrompt;