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// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: https://codemirror.net/LICENSE
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// Depends on jshint.js from https://github.com/jshint/jshint
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(function(mod) {
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  if (typeof exports == "object" && typeof module == "object") // CommonJS
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    mod(require("../../lib/codemirror"));
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  else if (typeof define == "function" && define.amd) // AMD
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    define(["../../lib/codemirror"], mod);
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  else // Plain browser env
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    mod(CodeMirror);
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})(function(CodeMirror) {
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  "use strict";
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  // declare global: JSHINT
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  function validator(text, options) {
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    if (!window.JSHINT) {
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      if (window.console) {
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        window.console.error("Error: window.JSHINT not defined, CodeMirror JavaScript linting cannot run.");
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      }
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      return [];
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    }
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    if (!options.indent) // JSHint error.character actually is a column index, this fixes underlining on lines using tabs for indentation
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      options.indent = 1; // JSHint default value is 4
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    JSHINT(text, options, options.globals);
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    var errors = JSHINT.data().errors, result = [];
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    if (errors) parseErrors(errors, result);
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    return result;
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  }
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  CodeMirror.registerHelper("lint", "javascript", validator);
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  function parseErrors(errors, output) {
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    for ( var i = 0; i < errors.length; i++) {
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      var error = errors[i];
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      if (error) {
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        if (error.line <= 0) {
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          if (window.console) {
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            window.console.warn("Cannot display JSHint error (invalid line " + error.line + ")", error);
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          }
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          continue;
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        }
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        var start = error.character - 1, end = start + 1;
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        if (error.evidence) {
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          var index = error.evidence.substring(start).search(/.\b/);
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          if (index > -1) {
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            end += index;
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          }
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        }
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        // Convert to format expected by validation service
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        var hint = {
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          message: error.reason,
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          severity: error.code ? (error.code.startsWith('W') ? "warning" : "error") : "error",
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          from: CodeMirror.Pos(error.line - 1, start),
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          to: CodeMirror.Pos(error.line - 1, end)
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        };
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        output.push(hint);
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      }
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    }
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  }
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});
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