"use strict";

exports.Node = void 0;

var _constants = require("../constants");

var _sourceUtils = require("./source-utils");

var _Range = require("./Range");

/** Root class of all nodes */
class Node {
  static addStringTerminator(src, offset, str) {
    if (str[str.length - 1] === '\n') return str;
    const next = Node.endOfWhiteSpace(src, offset);
    return next >= src.length || src[next] === '\n' ? str + '\n' : str;
  } // ^(---|...)


  static atDocumentBoundary(src, offset, sep) {
    const ch0 = src[offset];
    if (!ch0) return true;
    const prev = src[offset - 1];
    if (prev && prev !== '\n') return false;

    if (sep) {
      if (ch0 !== sep) return false;
    } else {
      if (ch0 !== _constants.Char.DIRECTIVES_END && ch0 !== _constants.Char.DOCUMENT_END) return false;
    }

    const ch1 = src[offset + 1];
    const ch2 = src[offset + 2];
    if (ch1 !== ch0 || ch2 !== ch0) return false;
    const ch3 = src[offset + 3];
    return !ch3 || ch3 === '\n' || ch3 === '\t' || ch3 === ' ';
  }

  static endOfIdentifier(src, offset) {
    let ch = src[offset];
    const isVerbatim = ch === '<';
    const notOk = isVerbatim ? ['\n', '\t', ' ', '>'] : ['\n', '\t', ' ', '[', ']', '{', '}', ','];

    while (ch && notOk.indexOf(ch) === -1) ch = src[offset += 1];

    if (isVerbatim && ch === '>') offset += 1;
    return offset;
  }

  static endOfIndent(src, offset) {
    let ch = src[offset];

    while (ch === ' ') ch = src[offset += 1];

    return offset;
  }

  static endOfLine(src, offset) {
    let ch = src[offset];

    while (ch && ch !== '\n') ch = src[offset += 1];

    return offset;
  }

  static endOfWhiteSpace(src, offset) {
    let ch = src[offset];

    while (ch === '\t' || ch === ' ') ch = src[offset += 1];

    return offset;
  }

  static startOfLine(src, offset) {
    let ch = src[offset - 1];
    if (ch === '\n') return offset;

    while (ch && ch !== '\n') ch = src[offset -= 1];

    return offset + 1;
  }
  /**
   * End of indentation, or null if the line's indent level is not more
   * than `indent`
   *
   * @param {string} src
   * @param {number} indent
   * @param {number} lineStart
   * @returns {?number}
   */


  static endOfBlockIndent(src, indent, lineStart) {
    const inEnd = Node.endOfIndent(src, lineStart);

    if (inEnd > lineStart + indent) {
      return inEnd;
    } else {
      const wsEnd = Node.endOfWhiteSpace(src, inEnd);
      const ch = src[wsEnd];
      if (!ch || ch === '\n') return wsEnd;
    }

    return null;
  }

  static atBlank(src, offset, endAsBlank) {
    const ch = src[offset];
    return ch === '\n' || ch === '\t' || ch === ' ' || endAsBlank && !ch;
  }

  static nextNodeIsIndented(ch, indentDiff, indicatorAsIndent) {
    if (!ch || indentDiff < 0) return false;
    if (indentDiff > 0) return true;
    return indicatorAsIndent && ch === '-';
  } // should be at line or string end, or at next non-whitespace char


  static normalizeOffset(src, offset) {
    const ch = src[offset];
    return !ch ? offset : ch !== '\n' && src[offset - 1] === '\n' ? offset - 1 : Node.endOfWhiteSpace(src, offset);
  } // fold single newline into space, multiple newlines to N - 1 newlines
  // presumes src[offset] === '\n'


  static foldNewline(src, offset, indent) {
    let inCount = 0;
    let error = false;
    let fold = '';
    let ch = src[offset + 1];

    while (ch === ' ' || ch === '\t' || ch === '\n') {
      switch (ch) {
        case '\n':
          inCount = 0;
          offset += 1;
          fold += '\n';
          break;

        case '\t':
          if (inCount <= indent) error = true;
          offset = Node.endOfWhiteSpace(src, offset + 2) - 1;
          break;

        case ' ':
          inCount += 1;
          offset += 1;
          break;
      }

      ch = src[offset + 1];
    }

    if (!fold) fold = ' ';
    if (ch && inCount <= indent) error = true;
    return {
      fold,
      offset,
      error
    };
  }

  constructor(type, props, context) {
    Object.defineProperty(this, 'context', {
      value: context || null,
      writable: true
    });
    this.error = null;
    this.range = null;
    this.valueRange = null;
    this.props = props || [];
    this.type = type;
    this.value = null;
  }

  getPropValue(idx, key, skipKey) {
    if (!this.context) return null;
    const {
      src
    } = this.context;
    const prop = this.props[idx];
    return prop && src[prop.start] === key ? src.slice(prop.start + (skipKey ? 1 : 0), prop.end) : null;
  }

  get anchor() {
    for (let i = 0; i < this.props.length; ++i) {
      const anchor = this.getPropValue(i, _constants.Char.ANCHOR, true);
      if (anchor != null) return anchor;
    }

    return null;
  }

  get comment() {
    const comments = [];

    for (let i = 0; i < this.props.length; ++i) {
      const comment = this.getPropValue(i, _constants.Char.COMMENT, true);
      if (comment != null) comments.push(comment);
    }

    return comments.length > 0 ? comments.join('\n') : null;
  }

  commentHasRequiredWhitespace(start) {
    const {
      src
    } = this.context;
    if (this.header && start === this.header.end) return false;
    if (!this.valueRange) return false;
    const {
      end
    } = this.valueRange;
    return start !== end || Node.atBlank(src, end - 1);
  }

  get hasComment() {
    if (this.context) {
      const {
        src
      } = this.context;

      for (let i = 0; i < this.props.length; ++i) {
        if (src[this.props[i].start] === _constants.Char.COMMENT) return true;
      }
    }

    return false;
  }

  get hasProps() {
    if (this.context) {
      const {
        src
      } = this.context;

      for (let i = 0; i < this.props.length; ++i) {
        if (src[this.props[i].start] !== _constants.Char.COMMENT) return true;
      }
    }

    return false;
  }

  get includesTrailingLines() {
    return false;
  }

  get jsonLike() {
    const jsonLikeTypes = [_constants.Type.FLOW_MAP, _constants.Type.FLOW_SEQ, _constants.Type.QUOTE_DOUBLE, _constants.Type.QUOTE_SINGLE];
    return jsonLikeTypes.indexOf(this.type) !== -1;
  }

  get rangeAsLinePos() {
    if (!this.range || !this.context) return undefined;
    const start = (0, _sourceUtils.getLinePos)(this.range.start, this.context.root);
    if (!start) return undefined;
    const end = (0, _sourceUtils.getLinePos)(this.range.end, this.context.root);
    return {
      start,
      end
    };
  }

  get rawValue() {
    if (!this.valueRange || !this.context) return null;
    const {
      start,
      end
    } = this.valueRange;
    return this.context.src.slice(start, end);
  }

  get tag() {
    for (let i = 0; i < this.props.length; ++i) {
      const tag = this.getPropValue(i, _constants.Char.TAG, false);

      if (tag != null) {
        if (tag[1] === '<') {
          return {
            verbatim: tag.slice(2, -1)
          };
        } else {
          // eslint-disable-next-line no-unused-vars
          const [_, handle, suffix] = tag.match(/^(.*!)([^!]*)$/);
          return {
            handle,
            suffix
          };
        }
      }
    }

    return null;
  }

  get valueRangeContainsNewline() {
    if (!this.valueRange || !this.context) return false;
    const {
      start,
      end
    } = this.valueRange;
    const {
      src
    } = this.context;

    for (let i = start; i < end; ++i) {
      if (src[i] === '\n') return true;
    }

    return false;
  }

  parseComment(start) {
    const {
      src
    } = this.context;

    if (src[start] === _constants.Char.COMMENT) {
      const end = Node.endOfLine(src, start + 1);
      const commentRange = new _Range.Range(start, end);
      this.props.push(commentRange);
      return end;
    }

    return start;
  }
  /**
   * Populates the `origStart` and `origEnd` values of all ranges for this
   * node. Extended by child classes to handle descendant nodes.
   *
   * @param {number[]} cr - Positions of dropped CR characters
   * @param {number} offset - Starting index of `cr` from the last call
   * @returns {number} - The next offset, matching the one found for `origStart`
   */


  setOrigRanges(cr, offset) {
    if (this.range) offset = this.range.setOrigRange(cr, offset);
    if (this.valueRange) this.valueRange.setOrigRange(cr, offset);
    this.props.forEach(prop => prop.setOrigRange(cr, offset));
    return offset;
  }

  toString() {
    const {
      context: {
        src
      },
      range,
      value
    } = this;
    if (value != null) return value;
    const str = src.slice(range.start, range.end);
    return Node.addStringTerminator(src, range.end, str);
  }

}

exports.Node = Node;