/* global define */
'use strict';

exports.__esModule = true;

var _utils = require('../utils');

var SourceNode = undefined;

try {
  /* istanbul ignore next */
  if (typeof define !== 'function' || !define.amd) {
    // We don't support this in AMD environments. For these environments, we asusme that
    // they are running on the browser and thus have no need for the source-map library.
    var SourceMap = require('source-map');
    SourceNode = SourceMap.SourceNode;
  }
} catch (err) {}
/* NOP */

/* istanbul ignore if: tested but not covered in istanbul due to dist build  */
if (!SourceNode) {
  SourceNode = function (line, column, srcFile, chunks) {
    this.src = '';
    if (chunks) {
      this.add(chunks);
    }
  };
  /* istanbul ignore next */
  SourceNode.prototype = {
    add: function add(chunks) {
      if (_utils.isArray(chunks)) {
        chunks = chunks.join('');
      }
      this.src += chunks;
    },
    prepend: function prepend(chunks) {
      if (_utils.isArray(chunks)) {
        chunks = chunks.join('');
      }
      this.src = chunks + this.src;
    },
    toStringWithSourceMap: function toStringWithSourceMap() {
      return { code: this.toString() };
    },
    toString: function toString() {
      return this.src;
    }
  };
}

function castChunk(chunk, codeGen, loc) {
  if (_utils.isArray(chunk)) {
    var ret = [];

    for (var i = 0, len = chunk.length; i < len; i++) {
      ret.push(codeGen.wrap(chunk[i], loc));
    }
    return ret;
  } else if (typeof chunk === 'boolean' || typeof chunk === 'number') {
    // Handle primitives that the SourceNode will throw up on
    return chunk + '';
  }
  return chunk;
}

function CodeGen(srcFile) {
  this.srcFile = srcFile;
  this.source = [];
}

CodeGen.prototype = {
  isEmpty: function isEmpty() {
    return !this.source.length;
  },
  prepend: function prepend(source, loc) {
    this.source.unshift(this.wrap(source, loc));
  },
  push: function push(source, loc) {
    this.source.push(this.wrap(source, loc));
  },

  merge: function merge() {
    var source = this.empty();
    this.each(function (line) {
      source.add(['  ', line, '\n']);
    });
    return source;
  },

  each: function each(iter) {
    for (var i = 0, len = this.source.length; i < len; i++) {
      iter(this.source[i]);
    }
  },

  empty: function empty() {
    var loc = this.currentLocation || { start: {} };
    return new SourceNode(loc.start.line, loc.start.column, this.srcFile);
  },
  wrap: function wrap(chunk) {
    var loc = arguments.length <= 1 || arguments[1] === undefined ? this.currentLocation || { start: {} } : arguments[1];

    if (chunk instanceof SourceNode) {
      return chunk;
    }

    chunk = castChunk(chunk, this, loc);

    return new SourceNode(loc.start.line, loc.start.column, this.srcFile, chunk);
  },

  functionCall: function functionCall(fn, type, params) {
    params = this.generateList(params);
    return this.wrap([fn, type ? '.' + type + '(' : '(', params, ')']);
  },

  quotedString: function quotedString(str) {
    return '"' + (str + '').replace(/\\/g, '\\\\').replace(/"/g, '\\"').replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/\u2028/g, '\\u2028') // Per Ecma-262 7.3 + 7.8.4
    .replace(/\u2029/g, '\\u2029') + '"';
  },

  objectLiteral: function objectLiteral(obj) {
    var pairs = [];

    for (var key in obj) {
      if (obj.hasOwnProperty(key)) {
        var value = castChunk(obj[key], this);
        if (value !== 'undefined') {
          pairs.push([this.quotedString(key), ':', value]);
        }
      }
    }

    var ret = this.generateList(pairs);
    ret.prepend('{');
    ret.add('}');
    return ret;
  },

  generateList: function generateList(entries) {
    var ret = this.empty();

    for (var i = 0, len = entries.length; i < len; i++) {
      if (i) {
        ret.add(',');
      }

      ret.add(castChunk(entries[i], this));
    }

    return ret;
  },

  generateArray: function generateArray(entries) {
    var ret = this.generateList(entries);
    ret.prepend('[');
    ret.add(']');

    return ret;
  }
};

exports['default'] = CodeGen;
module.exports = exports['default'];
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For these environments, we asusme that\n    // they are running on the browser and thus have no need for the source-map library.\n    let SourceMap = require('source-map');\n    SourceNode = SourceMap.SourceNode;\n  }\n} catch (err) {\n  /* NOP */\n}\n\n/* istanbul ignore if: tested but not covered in istanbul due to dist build  */\nif (!SourceNode) {\n  SourceNode = function(line, column, srcFile, chunks) {\n    this.src = '';\n    if (chunks) {\n      this.add(chunks);\n    }\n  };\n  /* istanbul ignore next */\n  SourceNode.prototype = {\n    add: function(chunks) {\n      if (isArray(chunks)) {\n        chunks = chunks.join('');\n      }\n      this.src += chunks;\n    },\n    prepend: function(chunks) {\n      if (isArray(chunks)) {\n        chunks = chunks.join('');\n      }\n      this.src = chunks + this.src;\n    },\n    toStringWithSourceMap: function() {\n      return {code: this.toString()};\n    },\n    toString: function() {\n      return this.src;\n    }\n  };\n}\n\n\nfunction castChunk(chunk, codeGen, loc) {\n  if (isArray(chunk)) {\n    let ret = [];\n\n    for (let i = 0, len = chunk.length; i < len; i++) {\n      ret.push(codeGen.wrap(chunk[i], loc));\n    }\n    return ret;\n  } else if (typeof chunk === 'boolean' || typeof chunk === 'number') {\n    // Handle primitives that the SourceNode will throw up on\n    return chunk + '';\n  }\n  return chunk;\n}\n\n\nfunction CodeGen(srcFile) {\n  this.srcFile = srcFile;\n  this.source = [];\n}\n\nCodeGen.prototype = {\n  isEmpty() {\n    return !this.source.length;\n  },\n  prepend: function(source, loc) {\n    this.source.unshift(this.wrap(source, loc));\n  },\n  push: function(source, loc) {\n    this.source.push(this.wrap(source, loc));\n  },\n\n  merge: function() {\n    let source = this.empty();\n    this.each(function(line) {\n      source.add(['  ', line, '\\n']);\n    });\n    return source;\n  },\n\n  each: function(iter) {\n    for (let i = 0, len = this.source.length; i < len; i++) {\n      iter(this.source[i]);\n    }\n  },\n\n  empty: function() {\n    let loc = this.currentLocation || {start: {}};\n    return new SourceNode(loc.start.line, loc.start.column, this.srcFile);\n  },\n  wrap: function(chunk, loc = this.currentLocation || {start: {}}) {\n    if (chunk instanceof SourceNode) {\n      return chunk;\n    }\n\n    chunk = castChunk(chunk, this, loc);\n\n    return new SourceNode(loc.start.line, loc.start.column, this.srcFile, chunk);\n  },\n\n  functionCall: function(fn, type, params) {\n    params = this.generateList(params);\n    return this.wrap([fn, type ? '.' + type + '(' : '(', params, ')']);\n  },\n\n  quotedString: function(str) {\n    return '\"' + (str + '')\n      .replace(/\\\\/g, '\\\\\\\\')\n      .replace(/\"/g, '\\\\\"')\n      .replace(/\\n/g, '\\\\n')\n      .replace(/\\r/g, '\\\\r')\n      .replace(/\\u2028/g, '\\\\u2028') // Per Ecma-262 7.3 + 7.8.4\n      .replace(/\\u2029/g, '\\\\u2029') + '\"';\n  },\n\n  objectLiteral: function(obj) {\n    let pairs = [];\n\n    for (let key in obj) {\n      if (obj.hasOwnProperty(key)) {\n        let value = castChunk(obj[key], this);\n        if (value !== 'undefined') {\n          pairs.push([this.quotedString(key), ':', value]);\n        }\n      }\n    }\n\n    let ret = this.generateList(pairs);\n    ret.prepend('{');\n    ret.add('}');\n    return ret;\n  },\n\n\n  generateList: function(entries) {\n    let ret = this.empty();\n\n    for (let i = 0, len = entries.length; i < len; i++) {\n      if (i) {\n        ret.add(',');\n      }\n\n      ret.add(castChunk(entries[i], this));\n    }\n\n    return ret;\n  },\n\n  generateArray: function(entries) {\n    let ret = this.generateList(entries);\n    ret.prepend('[');\n    ret.add(']');\n\n    return ret;\n  }\n};\n\nexport default CodeGen;\n\n"]}