// CodeMirror, copyright © by Marijn Haverbeke and others // Distributed under an MIT license: codemirror.net/LICENSE

/**

* Smarty 2 and 3 mode.
*/

(function(mod) {

if (typeof exports == "object" && typeof module == "object") // CommonJS
  mod(require("../../lib/codemirror"));
else if (typeof define == "function" && define.amd) // AMD
  define(["../../lib/codemirror"], mod);
else // Plain browser env
  mod(CodeMirror);

})(function(CodeMirror) {

"use strict";

CodeMirror.defineMode("smarty", function(config, parserConf) {
  var rightDelimiter = parserConf.rightDelimiter || "}";
  var leftDelimiter = parserConf.leftDelimiter || "{";
  var version = parserConf.version || 2;
  var baseMode = CodeMirror.getMode(config, parserConf.baseMode || "null");

  var keyFunctions = ["debug", "extends", "function", "include", "literal"];
  var regs = {
    operatorChars: /[+\-*&%=<>!?]/,
    validIdentifier: /[a-zA-Z0-9_]/,
    stringChar: /['"]/
  };

  var last;
  function cont(style, lastType) {
    last = lastType;
    return style;
  }

  function chain(stream, state, parser) {
    state.tokenize = parser;
    return parser(stream, state);
  }

  // Smarty 3 allows { and } surrounded by whitespace to NOT slip into Smarty mode
  function doesNotCount(stream, pos) {
    if (pos == null) pos = stream.pos;
    return version === 3 && leftDelimiter == "{" &&
      (pos == stream.string.length || /\s/.test(stream.string.charAt(pos)));
  }

  function tokenTop(stream, state) {
    var string = stream.string;
    for (var scan = stream.pos;;) {
      var nextMatch = string.indexOf(leftDelimiter, scan);
      scan = nextMatch + leftDelimiter.length;
      if (nextMatch == -1 || !doesNotCount(stream, nextMatch + leftDelimiter.length)) break;
    }
    if (nextMatch == stream.pos) {
      stream.match(leftDelimiter);
      if (stream.eat("*")) {
        return chain(stream, state, tokenBlock("comment", "*" + rightDelimiter));
      } else {
        state.depth++;
        state.tokenize = tokenSmarty;
        last = "startTag";
        return "tag";
      }
    }

    if (nextMatch > -1) stream.string = string.slice(0, nextMatch);
    var token = baseMode.token(stream, state.base);
    if (nextMatch > -1) stream.string = string;
    return token;
  }

  // parsing Smarty content
  function tokenSmarty(stream, state) {
    if (stream.match(rightDelimiter, true)) {
      if (version === 3) {
        state.depth--;
        if (state.depth <= 0) {
          state.tokenize = tokenTop;
        }
      } else {
        state.tokenize = tokenTop;
      }
      return cont("tag", null);
    }

    if (stream.match(leftDelimiter, true)) {
      state.depth++;
      return cont("tag", "startTag");
    }

    var ch = stream.next();
    if (ch == "$") {
      stream.eatWhile(regs.validIdentifier);
      return cont("variable-2", "variable");
    } else if (ch == "|") {
      return cont("operator", "pipe");
    } else if (ch == ".") {
      return cont("operator", "property");
    } else if (regs.stringChar.test(ch)) {
      state.tokenize = tokenAttribute(ch);
      return cont("string", "string");
    } else if (regs.operatorChars.test(ch)) {
      stream.eatWhile(regs.operatorChars);
      return cont("operator", "operator");
    } else if (ch == "[" || ch == "]") {
      return cont("bracket", "bracket");
    } else if (ch == "(" || ch == ")") {
      return cont("bracket", "operator");
    } else if (/\d/.test(ch)) {
      stream.eatWhile(/\d/);
      return cont("number", "number");
    } else {

      if (state.last == "variable") {
        if (ch == "@") {
          stream.eatWhile(regs.validIdentifier);
          return cont("property", "property");
        } else if (ch == "|") {
          stream.eatWhile(regs.validIdentifier);
          return cont("qualifier", "modifier");
        }
      } else if (state.last == "pipe") {
        stream.eatWhile(regs.validIdentifier);
        return cont("qualifier", "modifier");
      } else if (state.last == "whitespace") {
        stream.eatWhile(regs.validIdentifier);
        return cont("attribute", "modifier");
      } if (state.last == "property") {
        stream.eatWhile(regs.validIdentifier);
        return cont("property", null);
      } else if (/\s/.test(ch)) {
        last = "whitespace";
        return null;
      }

      var str = "";
      if (ch != "/") {
        str += ch;
      }
      var c = null;
      while (c = stream.eat(regs.validIdentifier)) {
        str += c;
      }
      for (var i=0, j=keyFunctions.length; i<j; i++) {
        if (keyFunctions[i] == str) {
          return cont("keyword", "keyword");
        }
      }
      if (/\s/.test(ch)) {
        return null;
      }
      return cont("tag", "tag");
    }
  }

  function tokenAttribute(quote) {
    return function(stream, state) {
      var prevChar = null;
      var currChar = null;
      while (!stream.eol()) {
        currChar = stream.peek();
        if (stream.next() == quote && prevChar !== '\\') {
          state.tokenize = tokenSmarty;
          break;
        }
        prevChar = currChar;
      }
      return "string";
    };
  }

  function tokenBlock(style, terminator) {
    return function(stream, state) {
      while (!stream.eol()) {
        if (stream.match(terminator)) {
          state.tokenize = tokenTop;
          break;
        }
        stream.next();
      }
      return style;
    };
  }

  return {
    startState: function() {
      return {
        base: CodeMirror.startState(baseMode),
        tokenize: tokenTop,
        last: null,
        depth: 0
      };
    },
    copyState: function(state) {
      return {
        base: CodeMirror.copyState(baseMode, state.base),
        tokenize: state.tokenize,
        last: state.last,
        depth: state.depth
      };
    },
    innerMode: function(state) {
      if (state.tokenize == tokenTop)
        return {mode: baseMode, state: state.base};
    },
    token: function(stream, state) {
      var style = state.tokenize(stream, state);
      state.last = last;
      return style;
    },
    indent: function(state, text) {
      if (state.tokenize == tokenTop && baseMode.indent)
        return baseMode.indent(state.base, text);
      else
        return CodeMirror.Pass;
    },
    blockCommentStart: leftDelimiter + "*",
    blockCommentEnd: "*" + rightDelimiter
  };
});

CodeMirror.defineMIME("text/x-smarty", "smarty");

});