



define(['module'], function (module) {
    'use strict';

    var text, fs, Cc, Ci, xpcIsWindows,
        progIds = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'],
        xmlRegExp = /^\s*<\?xml(\s)+version=[\'\"](\d)*.(\d)*[\'\"](\s)*\?>/im,
        bodyRegExp = /<body[^>]*>\s*([\s\S]+)\s*<\/body>/im,
        hasLocation = typeof location !== 'undefined' && location.href,
        defaultProtocol = hasLocation && location.protocol && location.protocol.replace(/\:/, ''),
        defaultHostName = hasLocation && location.hostname,
        defaultPort = hasLocation && (location.port || undefined),
        buildMap = {},
        masterConfig = (module.config && module.config()) || {};

    function useDefault(value, defaultValue) {
        return value === undefined || value === '' ? defaultValue : value;
    }

    
    function isSamePort(protocol1, port1, protocol2, port2) {
        if (port1 === port2) {
            return true;
        } else if (protocol1 === protocol2) {
            if (protocol1 === 'http') {
                return useDefault(port1, '80') === useDefault(port2, '80');
            } else if (protocol1 === 'https') {
                return useDefault(port1, '443') === useDefault(port2, '443');
            }
        }
        return false;
    }

    text = {
        version: '2.0.15',

        strip: function (content) {
            
            if (content) {
                content = content.replace(xmlRegExp, "");
                var matches = content.match(bodyRegExp);
                if (matches) {
                    content = matches[1];
                }
            } else {
                content = "";
            }
            return content;
        },

        jsEscape: function (content) {
            return content.replace(/(['\\])/g, '\\$1')
                .replace(/[\f]/g, "\\f")
                .replace(/[\b]/g, "\\b")
                .replace(/[\n]/g, "\\n")
                .replace(/[\t]/g, "\\t")
                .replace(/[\r]/g, "\\r")
                .replace(/[\u2028]/g, "\\u2028")
                .replace(/[\u2029]/g, "\\u2029");
        },

        createXhr: masterConfig.createXhr || function () {
            
            var xhr, i, progId;
            if (typeof XMLHttpRequest !== "undefined") {
                return new XMLHttpRequest();
            } else if (typeof ActiveXObject !== "undefined") {
                for (i = 0; i < 3; i += 1) {
                    progId = progIds[i];
                    try {
                        xhr = new ActiveXObject(progId);
                    } catch (e) {}

                    if (xhr) {
                        progIds = [progId];  
                        break;
                    }
                }
            }

            return xhr;
        },

        
        parseName: function (name) {
            var modName, ext, temp,
                strip = false,
                index = name.lastIndexOf("."),
                isRelative = name.indexOf('./') === 0 ||
                             name.indexOf('../') === 0;

            if (index !== -1 && (!isRelative || index > 1)) {
                modName = name.substring(0, index);
                ext = name.substring(index + 1);
            } else {
                modName = name;
            }

            temp = ext || modName;
            index = temp.indexOf("!");
            if (index !== -1) {
                
                strip = temp.substring(index + 1) === "strip";
                temp = temp.substring(0, index);
                if (ext) {
                    ext = temp;
                } else {
                    modName = temp;
                }
            }

            return {
                moduleName: modName,
                ext: ext,
                strip: strip
            };
        },

        xdRegExp: /^((\w+)\:)?\/\/([^\/\\]+)/,

        
        useXhr: function (url, protocol, hostname, port) {
            var uProtocol, uHostName, uPort,
                match = text.xdRegExp.exec(url);
            if (!match) {
                return true;
            }
            uProtocol = match[2];
            uHostName = match[3];

            uHostName = uHostName.split(':');
            uPort = uHostName[1];
            uHostName = uHostName[0];

            return (!uProtocol || uProtocol === protocol) &&
                   (!uHostName || uHostName.toLowerCase() === hostname.toLowerCase()) &&
                   ((!uPort && !uHostName) || isSamePort(uProtocol, uPort, protocol, port));
        },

        finishLoad: function (name, strip, content, onLoad) {
            content = strip ? text.strip(content) : content;
            if (masterConfig.isBuild) {
                buildMap[name] = content;
            }
            onLoad(content);
        },

        load: function (name, req, onLoad, config) {
            

            
            if (config && config.isBuild && !config.inlineText) {
                onLoad();
                return;
            }

            masterConfig.isBuild = config && config.isBuild;

            var parsed = text.parseName(name),
                nonStripName = parsed.moduleName +
                    (parsed.ext ? '.' + parsed.ext : ''),
                url = req.toUrl(nonStripName),
                useXhr = (masterConfig.useXhr) ||
                         text.useXhr;

            
            if (url.indexOf('empty:') === 0) {
                onLoad();
                return;
            }

            
            if (!hasLocation || useXhr(url, defaultProtocol, defaultHostName, defaultPort)) {
                text.get(url, function (content) {
                    text.finishLoad(name, parsed.strip, content, onLoad);
                }, function (err) {
                    if (onLoad.error) {
                        onLoad.error(err);
                    }
                });
            } else {
                
                req([nonStripName], function (content) {
                    text.finishLoad(parsed.moduleName + '.' + parsed.ext,
                                    parsed.strip, content, onLoad);
                });
            }
        },

        write: function (pluginName, moduleName, write, config) {
            if (buildMap.hasOwnProperty(moduleName)) {
                var content = text.jsEscape(buildMap[moduleName]);
                write.asModule(pluginName + "!" + moduleName,
                               "define(function () { return '" +
                                   content +
                               "';});\n");
            }
        },

        writeFile: function (pluginName, moduleName, req, write, config) {
            var parsed = text.parseName(moduleName),
                extPart = parsed.ext ? '.' + parsed.ext : '',
                nonStripName = parsed.moduleName + extPart,
                
                fileName = req.toUrl(parsed.moduleName + extPart) + '.js';

            
            text.load(nonStripName, req, function (value) {
                
                var textWrite = function (contents) {
                    return write(fileName, contents);
                };
                textWrite.asModule = function (moduleName, contents) {
                    return write.asModule(moduleName, fileName, contents);
                };

                text.write(pluginName, nonStripName, textWrite, config);
            }, config);
        }
    };

    if (masterConfig.env === 'node' || (!masterConfig.env &&
            typeof process !== "undefined" &&
            process.versions &&
            !!process.versions.node &&
            !process.versions['node-webkit'] &&
            !process.versions['atom-shell'])) {
        
        fs = require.nodeRequire('fs');

        text.get = function (url, callback, errback) {
            try {
                var file = fs.readFileSync(url, 'utf8');
                
                if (file[0] === '\uFEFF') {
                    file = file.substring(1);
                }
                callback(file);
            } catch (e) {
                if (errback) {
                    errback(e);
                }
            }
        };
    } else if (masterConfig.env === 'xhr' || (!masterConfig.env &&
            text.createXhr())) {
        text.get = function (url, callback, errback, headers) {
            var xhr = text.createXhr(), header;
            xhr.open('GET', url, true);

            
            if (headers) {
                for (header in headers) {
                    if (headers.hasOwnProperty(header)) {
                        xhr.setRequestHeader(header.toLowerCase(), headers[header]);
                    }
                }
            }

            
            if (masterConfig.onXhr) {
                masterConfig.onXhr(xhr, url);
            }

            xhr.onreadystatechange = function (evt) {
                var status, err;
                
                if (xhr.readyState === 4) {
                    status = xhr.status || 0;
                    if (status > 399 && status < 600) {
                        
                        err = new Error(url + ' HTTP status: ' + status);
                        err.xhr = xhr;
                        if (errback) {
                            errback(err);
                        }
                    } else {
                        callback(xhr.responseText);
                    }

                    if (masterConfig.onXhrComplete) {
                        masterConfig.onXhrComplete(xhr, url);
                    }
                }
            };
            xhr.send(null);
        };
    } else if (masterConfig.env === 'rhino' || (!masterConfig.env &&
            typeof Packages !== 'undefined' && typeof java !== 'undefined')) {
        
        text.get = function (url, callback) {
            var stringBuffer, line,
                encoding = "utf-8",
                file = new java.io.File(url),
                lineSeparator = java.lang.System.getProperty("line.separator"),
                input = new java.io.BufferedReader(new java.io.InputStreamReader(new java.io.FileInputStream(file), encoding)),
                content = '';
            try {
                stringBuffer = new java.lang.StringBuffer();
                line = input.readLine();

                

                
                if (line && line.length() && line.charAt(0) === 0xfeff) {
                    
                    line = line.substring(1);
                }

                if (line !== null) {
                    stringBuffer.append(line);
                }

                while ((line = input.readLine()) !== null) {
                    stringBuffer.append(lineSeparator);
                    stringBuffer.append(line);
                }
                
                content = String(stringBuffer.toString()); 
            } finally {
                input.close();
            }
            callback(content);
        };
    } else if (masterConfig.env === 'xpconnect' || (!masterConfig.env &&
            typeof Components !== 'undefined' && Components.classes &&
            Components.interfaces)) {
        
        Cc = Components.classes;
        Ci = Components.interfaces;
        Components.utils['import']('resource://gre/modules/FileUtils.jsm');
        xpcIsWindows = ('@mozilla.org/windows-registry-key;1' in Cc);

        text.get = function (url, callback) {
            var inStream, convertStream, fileObj,
                readData = {};

            if (xpcIsWindows) {
                url = url.replace(/\//g, '\\');
            }

            fileObj = new FileUtils.File(url);

            
            try {
                inStream = Cc['@mozilla.org/network/file-input-stream;1']
                           .createInstance(Ci.nsIFileInputStream);
                inStream.init(fileObj, 1, 0, false);

                convertStream = Cc['@mozilla.org/intl/converter-input-stream;1']
                                .createInstance(Ci.nsIConverterInputStream);
                convertStream.init(inStream, "utf-8", inStream.available(),
                Ci.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);

                convertStream.readString(inStream.available(), readData);
                convertStream.close();
                inStream.close();
                callback(readData.value);
            } catch (e) {
                throw new Error((fileObj && fileObj.path || '') + ': ' + e);
            }
        };
    }
    return text;
});
