/**
 * Copyright (C) 2018 Glayzzle (BSD3 License)
 * @authors https://github.com/glayzzle/php-parser/graphs/contributors
 * @url http://glayzzle.com
 */
"use strict";

module.exports = {
  matchST_IN_SCRIPTING: function () {
    let ch = this.input();
    switch (ch) {
      case " ":
      case "\t":
      case "\n":
      case "\r":
      case "\r\n":
        return this.T_WHITESPACE();
      case "#":
        if (this.version >= 800 && this._input[this.offset] === "[") {
          this.input();
          this.attributeListDepth[++this.attributeIndex] = 0;
          this.begin("ST_ATTRIBUTE");
          return this.tok.T_ATTRIBUTE;
        }
        return this.T_COMMENT();
      case "/":
        if (this._input[this.offset] === "/") {
          return this.T_COMMENT();
        } else if (this._input[this.offset] === "*") {
          this.input();
          return this.T_DOC_COMMENT();
        }
        return this.consume_TOKEN();
      case "'":
        return this.T_CONSTANT_ENCAPSED_STRING();
      case '"':
        return this.ST_DOUBLE_QUOTES();
      case "`":
        this.begin("ST_BACKQUOTE");
        return "`";
      case "?":
        if (!this.aspTagMode && this.tryMatch(">")) {
          this.input();
          const nextCH = this._input[this.offset];
          if (nextCH === "\n" || nextCH === "\r") this.input();
          if (this.conditionStack.length > 1) {
            this.begin("INITIAL");
          }
          return this.tok.T_CLOSE_TAG;
        }
        return this.consume_TOKEN();
      case "%":
        if (this.aspTagMode && this._input[this.offset] === ">") {
          this.input(); // consume the '>'
          ch = this._input[this.offset]; // read next
          if (ch === "\n" || ch === "\r") {
            this.input(); // consume the newline
          }
          this.aspTagMode = false;
          if (this.conditionStack.length > 1) {
            this.begin("INITIAL");
          }
          return this.tok.T_CLOSE_TAG;
        }
        return this.consume_TOKEN();
      case "{":
        this.begin("ST_IN_SCRIPTING");
        return "{";
      case "}":
        if (this.conditionStack.length > 2) {
          // Return to HEREDOC/ST_DOUBLE_QUOTES mode
          this.popState();
        }
        return "}";
      default:
        if (ch === ".") {
          ch = this.input();
          if (this.is_NUM_START()) {
            return this.consume_NUM();
          } else {
            if (ch) this.unput(1);
          }
        }
        if (this.is_NUM_START()) {
          return this.consume_NUM();
        } else if (this.is_LABEL_START()) {
          return this.consume_LABEL().T_STRING();
        } else if (this.is_TOKEN()) {
          return this.consume_TOKEN();
        }
    }
    throw new Error(
      'Bad terminal sequence "' +
        ch +
        '" at line ' +
        this.yylineno +
        " (offset " +
        this.offset +
        ")"
    );
  },

  T_WHITESPACE: function () {
    while (this.offset < this.size) {
      const ch = this.input();
      if (ch === " " || ch === "\t" || ch === "\n" || ch === "\r") {
        continue;
      }
      if (ch) this.unput(1);
      break;
    }
    return this.tok.T_WHITESPACE;
  },
};