define([
    'jquery',
    '/bower_components/chainpad-crypto/crypto.js',
    '/common/toolbar.js',
    '/bower_components/nthen/index.js',
    '/common/sframe-common.js',
    '/common/common-realtime.js',
    '/common/common-util.js',
    '/common/common-hash.js',
    '/common/common-interface.js',
    '/common/hyperscript.js',
    '/customize/messages.js',

    '/file/file-crypto.js',
    '/common/media-tag.js',

    '/bower_components/file-saver/FileSaver.min.js',

    'css!/bower_components/bootstrap/dist/css/bootstrap.min.css',
    'css!/bower_components/components-font-awesome/css/font-awesome.min.css',
    'less!/file/app-file.less',

], function (
    $,
    Crypto,
    Toolbar,
    nThen,
    SFCommon,
    CommonRealtime,
    Util,
    Hash,
    UI,
    h,
    Messages,
    FileCrypto,
    MediaTag)
{
    var saveAs = window.saveAs;
    var Nacl = window.nacl;

    var APP = window.APP = {};
    MediaTag.setDefaultConfig('download', {
        text: Messages.download_mt_button
    });

    var andThen = function (common) {
        var $appContainer = $('#cp-app-file-content');
        var $form = $('#cp-app-file-upload-form');
        var $dlform = $('#cp-app-file-download-form');
        var $dlview = $('#cp-app-file-download-view');
        var $label = $form.find('label');
        var $bar = $('.cp-toolbar-container');
        var $body = $('body');

        $body.on('dragover', function (e) { e.preventDefault(); });
        $body.on('drop', function (e) { e.preventDefault(); });

        var uploadMode = false;
        var secret;
        var metadataMgr = common.getMetadataMgr();
        var priv = metadataMgr.getPrivateData();
        var fileHost = priv.fileHost || priv.origin || '';

        if (!priv.filehash) {
            uploadMode = true;
        } else {
            secret = Hash.getSecrets('file', priv.filehash, priv.password);
            if (!secret.keys) { throw new Error("You need a hash"); }
        }

        var Title = common.createTitle({});
        var displayed = ['useradmin', 'newpad', 'limit', 'upgrade', 'notifications'];
        if (!uploadMode) {
            displayed.push('fileshare');
            displayed.push('access');
        }
        var configTb = {
            displayed: displayed,
            //hideDisplayName: true,
            $container: $bar,
            metadataMgr: metadataMgr,
            sfCommon: common,
        };
        if (uploadMode) {
            displayed.push('pageTitle');
            configTb.pageTitle = Messages.upload_title;
        }
        var toolbar = APP.toolbar = Toolbar.create(configTb);

        if (!uploadMode) {
            (function () {
                Messages.download = "Download"; // XXX
                Messages.decrypt = "Decrypt"; // XXX

                var progress = h('div.cp-app-file-progress');
                var progressTxt = h('span.cp-app-file-progress-txt');
                var $progress = $(progress);
                var $progressTxt = $(progressTxt);
                var downloadEl = h('span.cp-app-file-progress-dl', Messages.download);
                var decryptEl = h('span.cp-app-file-progress-dc', Messages.decrypt);
                var progressContainer = h('div.cp-app-file-progress-container', [
                    downloadEl,
                    decryptEl,
                    progress
                ]);

                var hexFileName = secret.channel;
                var src = fileHost + Hash.getBlobPathFromHex(hexFileName);
                var key = secret.keys && secret.keys.cryptKey;
                var cryptKey = Nacl.util.encodeBase64(key);

                FileCrypto.fetchDecryptedMetadata(src, key, function (e, metadata) {
                    if (e) {
                        if (e === 'XHR_ERROR') {
                            return void UI.errorLoadingScreen(Messages.download_resourceNotAvailable, false, function () {
                                common.gotoURL('/file/');
                            });
                        }
                        return void console.error(e);
                    }

                    // Add pad attributes when the file is saved in the drive
                    Title.onTitleChange(function () {
                        var owners = metadata.owners;
                        if (owners) { common.setPadAttribute('owners', owners); }
                        common.setPadAttribute('fileType', metadata.type);
                    });
                    $(document).on('cpPadStored', function () {
                        var owners = metadata.owners;
                        if (owners) { common.setPadAttribute('owners', owners); }
                        common.setPadAttribute('fileType', metadata.type);
                    });

                    // Save to the drive or update the acces time
                    var title = document.title = metadata.name;
                    Title.updateTitle(title || Title.defaultTitle);

                    var owners = metadata.owners;
                    if (owners) {
                        common.setPadAttribute('owners', owners);
                    }
                    if (metadata.type) {
                        common.setPadAttribute('fileType', metadata.type);
                    }

                    toolbar.addElement(['pageTitle'], {
                        pageTitle: title,
                        title: Title.getTitleConfig(),
                    });
                    toolbar.$drawer.append(common.createButton('forget', true));
                    toolbar.$drawer.append(common.createButton('properties', true));
                    if (common.isLoggedIn()) {
                        toolbar.$drawer.append(common.createButton('hashtag', true));
                    }
                    toolbar.$file.show();

                    var displayFile = function (ev, sizeMb, CB) {
                        var called_back;
                        var cb = function (e) {
                            if (called_back) { return; }
                            called_back = true;
                            if (CB) { CB(e); }
                        };

                        var $mt = $dlview.find('media-tag');
                        $mt.attr('src', src);
                        $mt.attr('data-crypto-key', 'cryptpad:'+cryptKey);

                        var rightsideDisplayed = false;

                        MediaTag($mt[0], {
                            force: true // Download starts automatically
                        }).on('complete', function (decrypted) {
                            $dlview.show();
                            $dlform.hide();
                            var $dlButton = $dlview.find('media-tag button');
                            if (ev) { $dlButton.click(); }

                            if (!rightsideDisplayed) {
                                toolbar.$drawer
                                .append(common.createButton('export', true, {}, function () {
                                    saveAs(decrypted.content, decrypted.metadata.name);
                                }));
                                rightsideDisplayed = true;
                            }

                            // make pdfs big
                            var toolbarHeight = $('#cp-toolbar').height();
                            var $another_iframe = $('media-tag iframe').css({
                                'height': 'calc(100vh - ' + toolbarHeight + 'px)',
                                'width': '100vw',
                                'position': 'absolute',
                                'bottom': 0,
                                'left': 0,
                                'border': 0
                            });

                            if ($another_iframe.length) {
                                $another_iframe.load(function () {
                                    cb();
                                });
                            } else {
                                cb();
                            }
                        }).on('progress', function (data) {
                            if (data.progress > 75) { return; }
                            var p = data.progress +'%';
                            $progress.width(p);
                            $progressTxt.text(Math.floor(data.progress) + '%');
                        }).on('error', function (err) {
                            console.error(err);
                        });
                    };

                    // XXX Update "download_button" key to use "download" first and "decrypt" second
                    var todoBigFile = function (sizeMb) {
                        $dlform.show();
                        UI.removeLoadingScreen();
                        var button = h('button.btn.btn-primary', {
                            title: Messages.download_button
                        }, Messages.download_button);
                        $dlform.append([
                            h('h2', Util.fixHTML(metadata.name)),
                            h('div.cp-button-container', [
                                button,
                                progressTxt
                            ]),
                        ]);

                        // don't display the size if you don't know it.
                        if (typeof(sizeMb) === 'number') {
                            $dlform.find('h2').append(' - ' +
                                Messages._getKey('formattedMB', [sizeMb]));
                        }
                        var decrypting = false;
                        var onClick = function (ev) {
                            if (decrypting) { return; }
                            decrypting = true;
                            $(button).prop('disabled', 'disabled');
                            $dlform.append(progressContainer);
                            displayFile(ev, sizeMb, function (err) {
                                $appContainer.css('background-color',
                                                  common.getAppConfig().appBackgroundColor);
                                if (err) { UI.alert(err); }
                            });
                        };
                        if (typeof(sizeMb) === 'number' && sizeMb < 5) { return void onClick(); }
                        $(button).click(onClick);
                    };
                    common.getFileSize(hexFileName, function (e, data) {
                        if (e) {
                            return void UI.errorLoadingScreen(e);
                        }
                        var size = Util.bytesToMegabytes(data);
                        return void todoBigFile(size);
                    });
                });
            })();
            return;
        }

        // we're in upload mode
        if (!common.isLoggedIn()) {
            UI.removeLoadingScreen();
            return UI.alert(Messages.upload_mustLogin, function () {
                common.setLoginRedirect('login');
            });
        }

        $form.css({
            display: 'block',
        });

        var fmConfig = {
            dropArea: $form,
            hoverArea: $label,
            body: $body,
            keepTable: true // Don't fadeOut the table with the uploaded files
        };

        var FM = common.createFileManager(fmConfig);

        $form.find("#cp-app-file-upfile").on('change', function (e) {
            var file = e.target.files[0];
            FM.handleFile(file);
        });

        UI.removeLoadingScreen();
    };

    var main = function () {
        var common;

        nThen(function (waitFor) {
            $(waitFor(function () {
                UI.addLoadingScreen();
            }));
            SFCommon.create(waitFor(function (c) { APP.common = common = c; }));
        }).nThen(function (/*waitFor*/) {
            common.getSframeChannel().onReady(function () {
                andThen(common);
            });
        });
    };
    main();
});