/* 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/. */


var preferences = require("sdk/simple-prefs");
var prefService = require("sdk/preferences/service");
var prefs = preferences.prefs;


function getDomainRegExpList(domainList){
	"use strict";
	
	var list = domainList
		.split(",")
		.map(function(entry){
			return entry.replace(/^\s+|\s+$/g, "");
		})
		.filter(function(entry){
			return !!entry.length;
		})
		.map(function(entry){
			var regExp;
			var domain = !!entry.match(/^[\w.]+$/);
			if (domain){
				regExp = new RegExp("(?:^|\\.)" + entry.replace(/([\\\+\*\?\[\^\]\$\(\)\{\}\=\!\|\.])/g, "\\$1") + "\\.?$", "i");
			}
			else {
				regExp = new RegExp(entry, "i");
			}
			return {
				match: function(url){
					if (domain){
						return url.hostname.match(regExp);
					}
					else {
						return url.href.match(regExp);
					}
				}
			};
		});
		
		list.match = function(url){
			return this.some(function(entry){
				return entry.match(url);
			});
		};
		
		return list;
}

var lists = {
	white: [],
	"ignore": [],
	black: []
};

function updateList(type){
	"use strict";
	
	lists[type] = getDomainRegExpList(prefs[type + "List"]);
}
Object.keys(lists).forEach(function(type){
	"use strict";
	
	preferences.on(type + "List", function(){
		updateList(type);
	});
	updateList(type);
});

function updateStackList(){
	try {
		var data = JSON.parse(prefs.stackList);
		if (!Array.isArray(data)){
			data = [data];
		}
		var list = data.filter(function(entry){
			return typeof entry === "object" && typeof entry.url === "string";
		});
	}
	catch(e){
		var list = [];
	}
	list.match = function(stack){
		return this.some(function(stackRule){
			return stack.match(stackRule);
		});
	};
	lists.stack = list;
}
lists.stack = [];
preferences.on("stackList", function(){
	updateStackList();
});
updateStackList();

exports.get = function getList(type){
	"use strict";
	
	return lists[type];
};
exports.appendTo = function appendToList(type, entry){
	"use strict";
	
	prefs[type + "List"] += (prefs[type + "List"]? ",": "") + entry;
	prefService.set("extensions.CanvasBlocker@kkapsner.de." + type + "List", prefs[type + "List"]);
	updateList(type);
};
exports.update = updateList;