(function() {
'use strict';

var weechat = angular.module('weechat');
var neoDropCrypto = require('./neodrop-crypto');

weechat.factory('imgur', ['$rootScope', 'settings', function($rootScope, settings) {
    var BASE = '{{DROPS_ORIGIN}}';

    var showErrorMsg = function(message) {
        $rootScope.uploadError = true;
        $rootScope.uploadErrorMessage = message || 'Encrypted upload failed.';
        if (!$rootScope.$$phase) $rootScope.$apply();
        setTimeout(function() {
            $rootScope.uploadError = false;
            if (!$rootScope.$$phase) $rootScope.$apply();
        }, 5000);
    };

    var process = function(file, callback) {
        if (!file || typeof file.size !== 'number') return;
        if (file.size > neoDropCrypto.LARGE_MAX) {
            showErrorMsg('NeoDrop files are limited to 1 GiB.');
            return;
        }
        var profile = (settings.dropProfile === 'large' || file.size > neoDropCrypto.SMALL_MAX) ? 1 : 0;
        var progressBars = document.getElementById('imgur-upload-progress');
        var bar = document.createElement('div');
        bar.className = 'imgur-progress-bar';
        progressBars.appendChild(bar);

        neoDropCrypto.upload(file, {
            base: BASE,
            profile: profile,
            onProgress: function(value) { bar.style.width = Math.round(value * 100) + '%'; }
        }).then(function(result) {
            if (typeof $rootScope.registerNeoDrop === 'function') {
                $rootScope.registerNeoDrop(result.readUrl, result.deleteCapability);
            }
            if (callback) callback(result.readUrl, result.deleteCapability);
        }).catch(function(error) {
            showErrorMsg(error.message);
        }).finally(function() {
            setTimeout(function() { if (bar.parentNode) bar.parentNode.removeChild(bar); }, 500);
        });
    };

    var deleteImage = function(capability, callback) {
        var split = String(capability || '').split('.');
        if (split.length !== 2) return showErrorMsg('Invalid deletion capability.');
        fetch(BASE + '/api/v1/objects/' + split[0], {
            method: 'DELETE', headers: {'Authorization': 'Bearer ' + split[1]}
        }).then(function(response) {
            if (!response.ok) throw new Error('Unable to delete encrypted file.');
            if (callback) callback(capability);
        }).catch(function() { showErrorMsg('Unable to delete encrypted file.'); });
    };

    return {process: process, deleteImage: deleteImage};
}]);

})();