define(['exports', 'async', 'fs', './handlebars', 'path', 'source-map'], function (exports, _async, _fs, _handlebars, _path, _sourceMap) {
  /* eslint-disable no-console */
  'use strict';

  // istanbul ignore next

  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }

  var _Async = _interopRequireDefault(_async);

  var _fs2 = _interopRequireDefault(_fs);

  module.exports.loadTemplates = function (opts, callback) {
    loadStrings(opts, function (err, strings) {
      if (err) {
        callback(err);
      } else {
        loadFiles(opts, function (err, files) {
          if (err) {
            callback(err);
          } else {
            opts.templates = strings.concat(files);
            callback(undefined, opts);
          }
        });
      }
    });
  };

  function loadStrings(opts, callback) {
    var strings = arrayCast(opts.string),
        names = arrayCast(opts.name);

    if (names.length !== strings.length && strings.length > 1) {
      return callback(new _handlebars.Exception('Number of names did not match the number of string inputs'));
    }

    _Async['default'].map(strings, function (string, callback) {
      if (string !== '-') {
        callback(undefined, string);
      } else {
        (function () {
          // Load from stdin
          var buffer = '';
          process.stdin.setEncoding('utf8');

          process.stdin.on('data', function (chunk) {
            buffer += chunk;
          });
          process.stdin.on('end', function () {
            callback(undefined, buffer);
          });
        })();
      }
    }, function (err, strings) {
      strings = strings.map(function (string, index) {
        return {
          name: names[index],
          path: names[index],
          source: string
        };
      });
      callback(err, strings);
    });
  }

  function loadFiles(opts, callback) {
    // Build file extension pattern
    var extension = (opts.extension || 'handlebars').replace(/[\\^$*+?.():=!|{}\-\[\]]/g, function (arg) {
      return '\\' + arg;
    });
    extension = new RegExp('\\.' + extension + '$');

    var ret = [],
        queue = (opts.files || []).map(function (template) {
      return { template: template, root: opts.root };
    });
    _Async['default'].whilst(function () {
      return queue.length;
    }, function (callback) {
      var _queue$shift = queue.shift();

      var path = _queue$shift.template;
      var root = _queue$shift.root;

      _fs2['default'].stat(path, function (err, stat) {
        if (err) {
          return callback(new _handlebars.Exception('Unable to open template file "' + path + '"'));
        }

        if (stat.isDirectory()) {
          opts.hasDirectory = true;

          _fs2['default'].readdir(path, function (err, children) {
            /* istanbul ignore next : Race condition that being too lazy to test */
            if (err) {
              return callback(err);
            }
            children.forEach(function (file) {
              var childPath = path + '/' + file;

              if (extension.test(childPath) || _fs2['default'].statSync(childPath).isDirectory()) {
                queue.push({ template: childPath, root: root || path });
              }
            });

            callback();
          });
        } else {
          _fs2['default'].readFile(path, 'utf8', function (err, data) {
            /* istanbul ignore next : Race condition that being too lazy to test */
            if (err) {
              return callback(err);
            }

            if (opts.bom && data.indexOf('﻿') === 0) {
              data = data.substring(1);
            }

            // Clean the template name
            var name = path;
            if (!root) {
              name = _path.basename(name);
            } else if (name.indexOf(root) === 0) {
              name = name.substring(root.length + 1);
            }
            name = name.replace(extension, '');

            ret.push({
              path: path,
              name: name,
              source: data
            });

            callback();
          });
        }
      });
    }, function (err) {
      if (err) {
        callback(err);
      } else {
        callback(undefined, ret);
      }
    });
  }

  module.exports.cli = function (opts) {
    if (opts.version) {
      console.log(_handlebars.VERSION);
      return;
    }

    if (!opts.templates.length && !opts.hasDirectory) {
      throw new _handlebars.Exception('Must define at least one template or directory.');
    }

    if (opts.simple && opts.min) {
      throw new _handlebars.Exception('Unable to minimize simple output');
    }

    var multiple = opts.templates.length !== 1 || opts.hasDirectory;
    if (opts.simple && multiple) {
      throw new _handlebars.Exception('Unable to output multiple templates in simple mode');
    }

    // Force simple mode if we have only one template and it's unnamed.
    if (!opts.amd && !opts.commonjs && opts.templates.length === 1 && !opts.templates[0].name) {
      opts.simple = true;
    }

    // Convert the known list into a hash
    var known = {};
    if (opts.known && !Array.isArray(opts.known)) {
      opts.known = [opts.known];
    }
    if (opts.known) {
      for (var i = 0, len = opts.known.length; i < len; i++) {
        known[opts.known[i]] = true;
      }
    }

    var objectName = opts.partial ? 'Handlebars.partials' : 'templates';

    var output = new _sourceMap.SourceNode();
    if (!opts.simple) {
      if (opts.amd) {
        output.add('define([\'' + opts.handlebarPath + 'handlebars.runtime\'], function(Handlebars) {\n  Handlebars = Handlebars["default"];');
      } else if (opts.commonjs) {
        output.add('var Handlebars = require("' + opts.commonjs + '");');
      } else {
        output.add('(function() {\n');
      }
      output.add('  var template = Handlebars.template, templates = ');
      if (opts.namespace) {
        output.add(opts.namespace);
        output.add(' = ');
        output.add(opts.namespace);
        output.add(' || ');
      }
      output.add('{};\n');
    }

    opts.templates.forEach(function (template) {
      var options = {
        knownHelpers: known,
        knownHelpersOnly: opts.o
      };

      if (opts.map) {
        options.srcName = template.path;
      }
      if (opts.data) {
        options.data = true;
      }

      var precompiled = _handlebars.precompile(template.source, options);

      // If we are generating a source map, we have to reconstruct the SourceNode object
      if (opts.map) {
        var consumer = new _sourceMap.SourceMapConsumer(precompiled.map);
        precompiled = _sourceMap.SourceNode.fromStringWithSourceMap(precompiled.code, consumer);
      }

      if (opts.simple) {
        output.add([precompiled, '\n']);
      } else {
        if (!template.name) {
          throw new _handlebars.Exception('Name missing for template');
        }

        if (opts.amd && !multiple) {
          output.add('return ');
        }
        output.add([objectName, '[\'', template.name, '\'] = template(', precompiled, ');\n']);
      }
    });

    // Output the content
    if (!opts.simple) {
      if (opts.amd) {
        if (multiple) {
          output.add(['return ', objectName, ';\n']);
        }
        output.add('});');
      } else if (!opts.commonjs) {
        output.add('})();');
      }
    }

    if (opts.map) {
      output.add('\n//# sourceMappingURL=' + opts.map + '\n');
    }

    output = output.toStringWithSourceMap();
    output.map = output.map + '';

    if (opts.min) {
      output = minify(output, opts.map);
    }

    if (opts.map) {
      _fs2['default'].writeFileSync(opts.map, output.map, 'utf8');
    }
    output = output.code;

    if (opts.output) {
      _fs2['default'].writeFileSync(opts.output, output, 'utf8');
    } else {
      console.log(output);
    }
  };

  function arrayCast(value) {
    value = value != null ? value : [];
    if (!Array.isArray(value)) {
      value = [value];
    }
    return value;
  }

  /**
   * Run uglify to minify the compiled template, if uglify exists in the dependencies.
   *
   * We are using `require` instead of `import` here, because es6-modules do not allow
   * dynamic imports and uglify-js is an optional dependency. Since we are inside NodeJS here, this
   * should not be a problem.
   *
   * @param {string} output the compiled template
   * @param {string} sourceMapFile the file to write the source map to.
   */
  function minify(output, sourceMapFile) {
    try {
      // Try to resolve uglify-js in order to see if it does exist
      require.resolve('uglify-js');
    } catch (e) {
      if (e.code !== 'MODULE_NOT_FOUND') {
        // Something else seems to be wrong
        throw e;
      }
      // it does not exist!
      console.error('Code minimization is disabled due to missing uglify-js dependency');
      return output;
    }
    return require('uglify-js').minify(output.code, {
      fromString: true,
      outSourceMap: sourceMapFile,
      inSourceMap: JSON.parse(output.map)
    });
  }
});
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