/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
(function(){
	"use strict";

	const logging = require("./logging");

	browser.storage.local.get().then(function(data){
		Object.keys(data).forEach(function(key){
			settings[key] = data[key];
		});
		settings.isStillDefault = false;
		logging.setPrefix("options page");
		logging.clearQueue();
		return settings;
	}).then(function(settings){
		function traverse(node, func){
			func(node);
			Array.from(node.childNodes).forEach(function(child){traverse(child, func);});
		}
		
		// getting the translation of all the messages
		logging.message("translate all messages");
		traverse(document.body, function(node){
			if (node.nodeType === 3){
				var lines = node.nodeValue.replace(/\b__MSG_(.+)__\b/g, function(m, key){
					try {
						return browser.i18n.getMessage(key);
					}
					catch (e){
						return "Unknown i18n key: " + key;
					}
				}).split(/\n/g);
				node.nodeValue = lines.shift();
				lines.forEach(function(line){
					node.parentNode.appendChild(document.createElement("br"));
					node.parentNode.appendChild(document.createTextNode(line));
				});
			}
		});
		
		logging.message("register events to store changes in local storage");
		Array.from(document.querySelectorAll("input.setting, select.setting")).forEach(function(input){
			var storageName = input.dataset.storageName;
			if (input.type === "checkbox"){
				input.checked = settings[storageName];
				
				input.addEventListener("click", function(){
					logging.message("changed setting", storageName, ":", this.checked);
					var value = this.checked;
					var obj = {};
					obj[storageName] = value;
					browser.storage.local.set(obj);
				});
			}
			else {
				input.value = settings[storageName];
				
				input.addEventListener("change", function(){
					var value = this.value;
					if (this.type === "number" || this.dataset.type === "number"){
						value = parseFloat(value);
					}
					logging.message("changed setting", storageName, ":", value);
					var obj = {};
					obj[storageName] = value;
					browser.storage.local.set(obj);
				});
			}
		});
		
		var callbacks = {
			showReleaseNotes: function(){
				logging.verbose("open release notes");
				window.open("../releaseNotes.txt", "_blank");
			},
			clearPersistentRnd: function(){
				logging.message("clear persistent rnd storage");
				logging.notice("empty storage");
				browser.storage.local.set({persistentRndStorage: ""});
				logging.notice("send message to main script");
				browser.runtime.sendMessage({"canvasBlocker-clear-domain-rnd": true});
			}
		};
		Array.from(document.querySelectorAll("button.setting")).forEach(function(button){
			var storageName = button.dataset.storageName;
			button.addEventListener("click", function(){
				if (callbacks[storageName]){
					callbacks[storageName]();
				}
			});
		});
		
		function updateDisplay(){
			logging.notice("update display");
			document.querySelectorAll("tr.settingRow").forEach(function(row){
				logging.verbose("evaluate display dependencies for", row.setting);
				var displayDependencies = row.setting.displayDependencies;
				if (displayDependencies){
					row.classList[(
						(
							Array.isArray(displayDependencies)?
								displayDependencies:
								[displayDependencies]
						).some(function(displayDependency){
							return Object.keys(displayDependency).every(function(key){
								return displayDependency[key].indexOf(settings[key]) !== -1;
							});
						})
					)? "remove": "add"]("hidden");
				}
			});
		}
		updateDisplay();
		
		browser.storage.onChanged.addListener(function(change, area){
			if (area === "local"){
				Object.keys(change).forEach(function(key){
					settings[key] = change[key].newValue;
					var input = document.querySelector(".setting[data-storage-name=" + key + "]");
					if (input){
						if (input.type === "checkbox"){
							input.checked = change[key].newValue;
						}
						else {
							input.value = change[key].newValue;
						}
					}
				});
				updateDisplay();
			}
		});
	});
}());