/* <copyright>
Copyright (c) 2012, Motorola Mobility LLC.
All Rights Reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

* Neither the name of Motorola Mobility LLC nor the names of its
  contributors may be used to endorse or promote products derived from this
  software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
</copyright> */

/* /////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
NOTES:

    The init function starts up the file system API, and a size must be
    set, no unlimited available as of now.

////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////// */
//
var Montage = require("montage/core/core").Montage;
////////////////////////////////////////////////////////////////////////
//
exports.ChromeApi = Montage.create(Object.prototype, {
    ////////////////////////////////////////////////////////////////////
    //Needs size in MBs for fileSystem init
    init: {
        enumerable: true,
        value: function(size) {
            //
            if (window.webkitRequestFileSystem) {
                //Current way to init Chrome's fileSystem API
                window.webkitRequestFileSystem(window.PERSISTENT, size*1024*1024, function (fs) {
                    //Storing reference to instance
                    this.fileSystem = fs;
                    //Dispatching action ready event
                    var readyEvent = document.createEvent("CustomEvent");
                    readyEvent.initEvent('ready', true, true);
                    this.dispatchEvent(readyEvent);
                    //Building data of local Ninja Library
                    this._listNinjaChromeLibrary();
                }.bind(this), function (e) {return false}); //Returns false on error (not able to init)
                //
                return true;
            } else {
                //No fileSystem API
                return false;
            }
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    _fileSystem: {
        enumerable: false,
        value: null
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileSystem: {
        enumerable: false,
        get: function() {
            return this._fileSystem;
        },
        set: function(value) {
            this._fileSystem = value;
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileNew: {
        enumerable: true,
        value: function(filePath, content, callback) {
            //
            this.fileSystem.root.getFile(filePath, {create: true}, function(f) {
                //
                f.createWriter(function(writer) {
                    //
                    var mime, blob, type = filePath.split('.'), version = parseInt(window.navigator.appVersion.match(/Chrome\/(\d+)\./)[1], 10);
                    type = type[type.length-1];
                    switch (type) {
                        case 'bmp':
                            mime = 'image/bmp';
                            break;
                        case 'gif':
                            mime = 'image/gif';
                            break;
                        case 'jpeg':
                            mime = 'image/jpeg';
                            break;
                        case 'jpg':
                            mime = 'image/jpeg';
                            break;
                        case 'png':
                            mime = 'image/png';
                            break;
                        case 'rtf':
                            mime = 'application/rtf';
                            break;
                        case 'tif':
                            mime = 'image/tiff';
                            break;
                        case 'tiff':
                            mime = 'image/tiff';
                            break;
                        case 'pdf':
                            mime = 'application/pdf';
                            break;
                        case 'zip':
                            mime = 'application/zip';
                            break;
                        case 'svg':
                            mime = 'image/svg+xml';
                            break;
                        default:
                            mime = 'text/'+type;
                            break;
                    }
                    //
                    blob = new Blob([new Uint8Array(content)], {type: type});
                    //
                    writer.write(blob);
                    //
                    if (callback) callback(true);
                }, function (e) {if (callback) callback(false)});
            }, function (e) {if (callback) callback(false)});
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileDelete: {
        enumerable: true,
        value: function(filePath, callback) {
            this.fileSystem.root.getFile(filePath, {create: false}, function(file) {
                file.remove(function() {
                    if (callback) callback(true);
                });
            }, function (e) {if (callback) callback(false)});
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileContent: {
        enumerable: true,
        value: function(filePath, callback) {
            //
            this.fileSystem.root.getFile(filePath, {}, function(f) {
                f.file(function(file) {
                    var reader = new FileReader(), version = parseInt(window.navigator.appVersion.match(/Chrome\/(\d+)\./)[1], 10);
                    reader.onloadend = function(e) {
                        if (callback) {
                            //TODO: Remove version checking once Chrome version 22 is stable
                            if (version > 21) {
                                callback({content: new Uint8Array(this.result), data: file, file: f, url: f.toURL()});
                            } else {
                                callback({content: this.result, data: file, file: f, url: f.toURL()});
                            }
                        }
                    };
                    reader.readAsArrayBuffer(file);
                }, function (e) {if (callback) callback(false)});
            }, function (e) {if (callback) callback(false)});
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileCopy: {
        enumerable: true,
        value: function() {
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileRename: {
        enumerable: true,
        value: function() {
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    fileMove: {
        enumerable: true,
        value: function() {
        }
    },
    ////////////////////////////////////////////////////////////////////
    //Creating directory from path, callback optional
    directoryNew: {
        enumerable: true,
        value: function(directoryPath, callback) {
            //Checking for directory not to already exist
            this.fileSystem.root.getDirectory(directoryPath, {}, function(dir) {
                if (callback) callback(false);
                return false; //Directory already exists
            });
            //Creating new directory
            this.fileSystem.root.getDirectory(directoryPath, {create: true}, function(dir) {
                if (callback) callback(true);
            }, function (e) {if (callback) callback(false)});
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    directoryDelete: {
        enumerable: true,
        value: function(directoryPath, callback) {
            //
            this.fileSystem.root.getDirectory(directoryPath, {}, function(dir) {
                //
                dir.removeRecursively(function() {
                    if (callback) callback(true);
                });
            }, function (e) {if (callback) callback(false)});
        }
    },
    ////////////////////////////////////////////////////////////////////
    //Returns the directory contents to a callback function
    directoryContents: {
        enumerable: true,
        value: function(directory, callback) {
            //Creating instance of directory reader
            this.fileSystem.directoryReader = directory.createReader();
            //Getting directory contents and sending results to callback
            this.fileSystem.directoryReader.readEntries(function(results) {
                //Calling callback with results (null if invalid directory)
                callback(results);
            }, function (e) {callback(null)});
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    directoryCopy: {
        enumerable: true,
        value: function() {
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    directoryRename: {
        enumerable: true,
        value: function() {
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    directoryMove: {
        enumerable: true,
        value: function() {
        }
    },
    ////////////////////////////////////////////////////////////////////
    //
    _listNinjaChromeLibrary: {
        enumerable: false,
        value: function () {
            function parseLibrary (contents) {
                //
                var lib = [];
                //
                for(var i=0; contents[i]; i++) {
                    //
                    if (contents[i].isDirectory) {
                        lib.push(contents[i].name);
                    }
                }
                //Dispatching action ready event
                var libraryEvent = document.createEvent("CustomEvent");
                libraryEvent.initEvent('library', true, true);
                libraryEvent.ninjaChromeLibrary = lib;
                this.dispatchEvent(libraryEvent);
            };
            //
            this.directoryContents(this.fileSystem.root, parseLibrary.bind(this));
        }
    }
    ////////////////////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////
});
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////