/*  LOOT

    A load order optimisation tool for Oblivion, Skyrim, Fallout 3 and
    Fallout: New Vegas.

    Copyright (C) 2013-2014    WrinklyNinja

    This file is part of LOOT.

    LOOT is free software: you can redistribute
    it and/or modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation, either version 3 of
    the License, or (at your option) any later version.

    LOOT is distributed in the hope that it will
    be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with LOOT.  If not, see
    <http://www.gnu.org/licenses/>.
*/
'use strict';
function isStorageSupported() {
    try {
        return ('localStorage' in window && window['localStorage'] !== null && window['localStorage'] !== undefined);
    } catch (e) {
        return false;
    }
}
function saveCheckboxState(evt) {
    if (evt.currentTarget.checked) {
        try {
            localStorage.setItem(evt.currentTarget.id, true);
        } catch (e) {
            if (e == QUOTA_EXCEEDED_ERR) {
                alert('Web storage quota for this document has been exceeded. Please empty your browser\'s cache. Note that this will delete all locally stored data.');
            }
        }
    } else {
        localStorage.removeItem(evt.currentTarget.id);
    }
}
function loadSettings() {
    var i = localStorage.length - 1;
    while (i > -1) {
        var elem = document.getElementById(localStorage.key(i));
        if (elem != null && 'defaultChecked' in elem) {
			elem.dispatchEvent(new MouseEvent('click'));
        }
        i--;
    }
}
function showElement(element) {
    if (element != null) {
        if (element.className.indexOf('hidden') != -1) {
            element.className = element.className.replace('hidden', '');
        }
    }
}
function hideElement(element) {
    if (element != null) {
        if (element.className.indexOf('hidden') == -1) {
            element.className += ' hidden';
        }
    }
}
function stepUnhideElement(element) {
    if (element != null && element.className.indexOf('hidden') != -1) {
        element.className = element.className.replace('hidden', '');
    }
}
function stepHideElement(element) {
    if (element != null) {
        element.className += ' hidden';
    }
}
function toggleDisplayCSS(evt) {
    var e = document.getElementsByClassName(evt.target.getAttribute('data-class'));
    if (evt.target.checked) {
        for (var i = 0, z = e.length; i < z; i++) {
            e[i].className += ' hidden';
        }
    } else {
        for (var i = 0, z = e.length; i < z; i++) {
            e[i].className = e[i].className.replace('hidden', '');
        }
    }
}
function toggleFilters(evt) {
    var filters = document.getElementById('filters');
    if (document.getElementById('filtersToggle').className.indexOf('current') == -1) {
        showElement(filters);
        evt.target.className += ' current';
    } else {
        hideElement(filters);
        evt.target.className = evt.target.className.replace('current', '');
    }
}
function showSection(evt) {
    var elemArr = document.getElementById('nav').querySelectorAll('.button[data-section]');
    var i = elemArr.length - 1;
    while (i > -1) {
        hideElement(document.getElementById(elemArr[i].getAttribute('data-section')));
        i--;
    }
    showElement(document.getElementById(evt.target.getAttribute('data-section')));
    var elem = document.querySelector('#nav div.current[data-section]');
    if (elem != null) {
        elem.className = elem.className.replace('current', '');
    }
    if (evt.target.className.indexOf('current') == -1) {
        evt.target.className += ' current';
    } /*Also enable/disable filters based on current page.*/
    if (evt.target.getAttribute('data-section') == 'plugins') {
        showElement(document.getElementById('filtersToggle'));
        if (document.getElementById('filtersToggle').className.indexOf('current') != -1) {
            showElement(filters);
        }
    } else {
        hideElement(document.getElementById('filtersToggle'));
        hideElement(document.getElementById('filters'));
    }
}
function toggleMessages(evt) {
    var listItems = document.getElementById('plugins').getElementsByTagName('li');
    var i = listItems.length - 1;
    var hiddenNo = parseInt(document.getElementById('hiddenMessageNo').innerHTML);
    while (i > -1) {
        var spans = listItems[i].getElementsByTagName('span');
        if (spans.length == 0 || spans[0].className.indexOf('mod') == -1) {
            var filterMatch = false;
            if (evt.target.id == 'hideAllPluginMessages') {
                filterMatch = true;
            } else if (evt.target.id == 'hideNotes' && listItems[i].className.indexOf('say') != -1) {
                filterMatch = true;
            } else if (evt.target.id == 'hideDoNotCleanMessages' && listItems[i].innerHTML.indexOf('Do not clean.') != -1) {
                filterMatch = true;
            }
            if (filterMatch) {
                if (evt.target.checked) {
                    if (listItems[i].className.indexOf('hidden') == -1) {
                        hiddenNo++;
                    }
                    stepHideElement(listItems[i]);
                } else {
                    stepUnhideElement(listItems[i]);
                    if (listItems[i].className.indexOf('hidden') == -1) {
                        hiddenNo--;
                    }
                }
            }
        }
        i--;
    }
	document.getElementById('hiddenMessageNo').innerHTML = hiddenNo;
	togglePlugins(evt);
}
function togglePlugins(evt) {
    var plugins = document.getElementById('plugins').getElementsByTagName('ul')[0].childNodes;
    var i = plugins.length - 1;
    var hiddenNo = parseInt(document.getElementById('hiddenPluginNo').innerHTML);
    while (i > -1) {
        if (plugins[i].nodeType == Node.ELEMENT_NODE) {
            var isMessageless = true;
            var messages = plugins[i].getElementsByTagName('li');
            var j = messages.length - 1;
            while (j > -1) {
                if (messages[j].className.indexOf('hidden') == -1) {
                    isMessageless = false;
                    break;
                }
                j--;
            }
            if (document.getElementById('hideMessagelessPlugins').checked && isMessageless) {
                if (plugins[i].className.indexOf('hidden') == -1) {
                    hiddenNo++;
                    hideElement(plugins[i]);
                }
            } else if (plugins[i].className.indexOf('hidden') != -1) {
                hiddenNo--;
                showElement(plugins[i]);
            }
        }
        i--;
    }
    document.getElementById('hiddenPluginNo').innerHTML = hiddenNo;
}
function setupEventHandlers() {
    var i, elemArr;
    if (isStorageSupported()) { /*Set up filter value and CSS setting storage read/write handlers.*/
        elemArr = document.getElementById('filters').getElementsByTagName('input');
        i = elemArr.length - 1;
        while (i > -1) {
            elemArr[i].addEventListener('click', saveCheckboxState, false);
            i--;
        }
    }
    document.getElementById('filtersToggle').addEventListener('click', toggleFilters, false);
    /*Set up handlers for section display.*/
    elemArr = document.getElementById('nav').querySelectorAll('.button[data-section]');
    var i = elemArr.length - 1;
    while (i > -1) {
        elemArr[i].addEventListener('click', showSection, false);
        i--;
    }
    document.getElementById('hideVersionNumbers').addEventListener('click', toggleDisplayCSS, false);
    document.getElementById('hideCRCs').addEventListener('click', toggleDisplayCSS, false);
    document.getElementById('hideBashTags').addEventListener('click', toggleDisplayCSS, false);
    document.getElementById('hideNotes').addEventListener('click', toggleMessages, false);
    document.getElementById('hideDoNotCleanMessages').addEventListener('click', toggleMessages, false);
    document.getElementById('hideAllPluginMessages').addEventListener('click', toggleMessages, false);
    document.getElementById('hideMessagelessPlugins').addEventListener('click', togglePlugins, false);
}
function init() {
    setupEventHandlers();
    if (isStorageSupported()) {
        loadSettings();
    }
    showElement(document.getElementsByTagName('section')[0])
}
init();