var common = require('./common');
var checkIfAuth = common.checkIfAuth;
var urlpath = common.urlpath;
var serverurl = common.serverurl;
var resetCheckAuth = common.resetCheckAuth;
var getLoginState = common.getLoginState;
var clearLoginState = common.clearLoginState;

var historyModule = require('./history');
var parseStorageToHistory = historyModule.parseStorageToHistory;
var parseHistory = historyModule.parseHistory;
var getStorageHistory = historyModule.getStorageHistory;
var getHistory = historyModule.getHistory;
var saveHistory = historyModule.saveHistory;
var removeHistory = historyModule.removeHistory;
var postHistoryToServer = historyModule.postHistoryToServer;
var deleteServerHistory = historyModule.deleteServerHistory;
var parseServerToHistory = historyModule.parseServerToHistory;
var saveStorageHistoryToServer = historyModule.saveStorageHistoryToServer;

var saveAs = require('file-saver').saveAs;
var List = require('list.js');

var options = {
    valueNames: ['id', 'text', 'timestamp', 'fromNow', 'time', 'tags', 'pinned'],
    item: '<li class="col-xs-12 col-sm-6 col-md-6 col-lg-4">\
            <span class="id" style="display:none;"></span>\
            <a href="#">\
                <div class="item">\
					<div class="ui-history-pin fa fa-thumb-tack fa-fw"></div>\
                    <div class="ui-history-close fa fa-close fa-fw" data-toggle="modal" data-target=".delete-modal"></div>\
                    <div class="content">\
                        <h4 class="text"></h4>\
                        <p>\
                            <i><i class="fa fa-clock-o"></i> visited </i><i class="fromNow"></i>\
                            <br>\
                            <i class="timestamp" style="display:none;"></i>\
                            <i class="time"></i>\
                        </p>\
                        <p class="tags"></p>\
                    </div>\
                </div>\
            </a>\
           </li>',
    page: 18,
    plugins: [
        ListPagination({
            outerWindow: 1
        })
    ]
};
var historyList = new List('history', options);

migrateHistoryFromTempCallback = pageInit;
loginStateChangeEvent = pageInit;
pageInit();

function pageInit() {
    checkIfAuth(
        function (data) {
            $('.ui-signin').hide();
            $('.ui-or').hide();
            $('.ui-welcome').show();
            if (data.photo) $('.ui-avatar').prop('src', data.photo).show();
            else $('.ui-avatar').prop('src', '').hide();
            $('.ui-name').html(data.name);
            $('.ui-signout').show();
            $(".ui-history").click();
            parseServerToHistory(historyList, parseHistoryCallback);
        },
        function () {
            $('.ui-signin').show();
            $('.ui-or').show();
            $('.ui-welcome').hide();
            $('.ui-avatar').prop('src', '').hide();
            $('.ui-name').html('');
            $('.ui-signout').hide();
            parseStorageToHistory(historyList, parseHistoryCallback);
        }
    );
}

$(".masthead-nav li").click(function () {
    $(this).siblings().removeClass("active");
    $(this).addClass("active");
});

$(".ui-home").click(function () {
    if (!$("#home").is(':visible')) {
        $(".section:visible").hide();
        $("#home").fadeIn();
    }
});

$(".ui-history").click(function () {
    if (!$("#history").is(':visible')) {
        $(".section:visible").hide();
        $("#history").fadeIn();
    }
});

function checkHistoryList() {
    if ($("#history-list").children().length > 0) {
        $(".ui-nohistory").hide();
        $(".ui-import-from-browser").hide();
    } else if ($("#history-list").children().length == 0) {
        $(".ui-nohistory").slideDown();
        getStorageHistory(function (data) {
            if (data && data.length > 0 && getLoginState() && historyList.items.length == 0) {
                $(".ui-import-from-browser").slideDown();
            }
        });
    }
}

function parseHistoryCallback(list, notehistory) {
    checkHistoryList();
	//sort by pinned then timestamp
	list.sort('', {
        sortFunction: function (a, b) {
			var notea = a.values();
            var noteb = b.values();
			if (notea.pinned && !noteb.pinned) {
                return -1;
            } else if (!notea.pinned && noteb.pinned) {
                return 1;
            } else {
				if (notea.timestamp > noteb.timestamp) {
                	return -1;
				} else if (notea.timestamp < noteb.timestamp) {
					return 1;
				} else {
					return 0;
				}
			}
		}
	});
    // parse filter tags
    var filtertags = [];
    for (var i = 0, l = list.items.length; i < l; i++) {
        var tags = list.items[i]._values.tags;
        if (tags && tags.length > 0) {
            for (var j = 0; j < tags.length; j++) {
                //push info filtertags if not found
                var found = false;
                if (filtertags.indexOf(tags[j]) != -1)
                    found = true;
                if (!found)
                    filtertags.push(tags[j]);
            }
        }
    }
    buildTagsFilter(filtertags);
}

// update items whenever list updated
historyList.on('updated', function (e) {
    for (var i = 0, l = e.items.length; i < l; i++) {
        var item = e.items[i];
        if (item.visible()) {
            var itemEl = $(item.elm);
            var values = item._values;
            var a = itemEl.find("a");
            var pin = itemEl.find(".ui-history-pin");
            var tagsEl = itemEl.find(".tags");
            //parse link to element a
            a.attr('href', serverurl + '/' + values.id);
            //parse pinned
            if (values.pinned) {
                pin.addClass('active');
            } else {
                pin.removeClass('active');
            }
            //parse tags
            var tags = values.tags;
            if (tags && tags.length > 0 && tagsEl.children().length <= 0) {
                var labels = [];
                for (var j = 0; j < tags.length; j++) {
                    //push into the item label
                    labels.push("<span class='label label-default'>" + tags[j] + "</span>");
                }
                tagsEl.html(labels.join(' '));
            }
        }
    }
    $(".ui-history-close").off('click');
    $(".ui-history-close").on('click', historyCloseClick);
    $(".ui-history-pin").off('click');
    $(".ui-history-pin").on('click', historyPinClick);
});

function historyCloseClick(e) {
    e.preventDefault();
    var id = $(this).closest("a").siblings("span").html();
    var value = historyList.get('id', id)[0]._values;
    $('.ui-delete-modal-msg').text('Do you really want to delete below history?');
    $('.ui-delete-modal-item').html('<i class="fa fa-file-text"></i> ' + value.text + '<br><i class="fa fa-clock-o"></i> ' + value.time);
    clearHistory = false;
    deleteId = id;
}

function historyPinClick(e) {
    e.preventDefault();
    var $this = $(this);
    var id = $this.closest("a").siblings("span").html();
    var item = historyList.get('id', id)[0];
    var values = item._values;
    var pinned = values.pinned;
    if (!values.pinned) {
        pinned = true;
        item._values.pinned = true;
    } else {
        pinned = false;
        item._values.pinned = false;
    }
    checkIfAuth(function () {
        postHistoryToServer(id, {
            pinned: pinned
        }, function (err, result) {
            if (!err) {
                if (pinned)
                    $this.addClass('active');
                else
                    $this.removeClass('active');
            }
        });
    }, function () {
        getHistory(function (notehistory) {
            for(var i = 0; i < notehistory.length; i++) {
                if (notehistory[i].id == id) {
                    notehistory[i].pinned = pinned;
                    break;
                }
            }
            saveHistory(notehistory);
            if (pinned)
                $this.addClass('active');
            else
                $this.removeClass('active');
        });
    });
}

//auto update item fromNow every minutes
setInterval(updateItemFromNow, 60000);

function updateItemFromNow() {
    var items = $('.item').toArray();
    for (var i = 0; i < items.length; i++) {
        var item = $(items[i]);
        var timestamp = parseInt(item.find('.timestamp').text());
        item.find('.fromNow').text(moment(timestamp).fromNow());
    }
}

var clearHistory = false;
var deleteId = null;

function deleteHistory() {
    checkIfAuth(function () {
        deleteServerHistory(deleteId, function (err, result) {
            if (!err) {
                if (clearHistory) {
                    historyList.clear();
                    checkHistoryList();
                } else {
                    historyList.remove('id', deleteId);
                    checkHistoryList();
                }
            }
            $('.delete-modal').modal('hide');
            deleteId = null;
            clearHistory = false;
        });
    }, function () {
        if (clearHistory) {
            saveHistory([]);
            historyList.clear();
            checkHistoryList();
            deleteId = null;
        } else {
            if (!deleteId) return;
            getHistory(function (notehistory) {
                var newnotehistory = removeHistory(deleteId, notehistory);
                saveHistory(newnotehistory);
                historyList.remove('id', deleteId);
                checkHistoryList();
                deleteId = null;
            });
        }
        $('.delete-modal').modal('hide');
        clearHistory = false;
    });
}

$(".ui-delete-modal-confirm").click(function () {
    deleteHistory();
});

$(".ui-import-from-browser").click(function () {
    saveStorageHistoryToServer(function () {
        parseStorageToHistory(historyList, parseHistoryCallback);
    });
});

$(".ui-save-history").click(function () {
    getHistory(function (data) {
        var history = JSON.stringify(data);
        var blob = new Blob([history], {
            type: "application/json;charset=utf-8"
        });
        saveAs(blob, 'hackmd_history_' + moment().format('YYYYMMDDHHmmss'));
    });
});

$(".ui-open-history").bind("change", function (e) {
    var files = e.target.files || e.dataTransfer.files;
    var file = files[0];
    var reader = new FileReader();
    reader.onload = function () {
        var notehistory = JSON.parse(reader.result);
        //console.log(notehistory);
        if (!reader.result) return;
        getHistory(function (data) {
            var mergedata = data.concat(notehistory);
            mergedata = clearDuplicatedHistory(mergedata);
            saveHistory(mergedata);
            parseHistory(historyList, parseHistoryCallback);
        });
        $(".ui-open-history").replaceWith($(".ui-open-history").val('').clone(true));
    };
    reader.readAsText(file);
});

$(".ui-clear-history").click(function () {
    $('.ui-delete-modal-msg').text('Do you really want to clear all history?');
    $('.ui-delete-modal-item').html('There is no turning back.');
    clearHistory = true;
    deleteId = null;
});

$(".ui-refresh-history").click(function () {
    var lastTags = $(".ui-use-tags").select2('val');
    $(".ui-use-tags").select2('val', '');
    historyList.filter();
    var lastKeyword = $('.search').val();
    $('.search').val('');
    historyList.search();
    $('#history-list').slideUp('fast');
    $('.pagination').slideUp('fast');

    resetCheckAuth();
    historyList.clear();
    parseHistory(historyList, function (list, notehistory) {
        parseHistoryCallback(list, notehistory);
        $(".ui-use-tags").select2('val', lastTags);
        $(".ui-use-tags").trigger('change');
        historyList.search(lastKeyword);
        $('.search').val(lastKeyword);
        checkHistoryList();
        $('#history-list').slideDown('fast');
        $('.pagination').slideDown('fast');
    });
});

$(".ui-logout").click(function () {
    clearLoginState();
    location.href = serverurl + '/logout';
});

var filtertags = [];
$(".ui-use-tags").select2({
    placeholder: $(".ui-use-tags").attr('placeholder'),
    multiple: true,
    data: function () {
        return {
            results: filtertags
        };
    }
});
$('.select2-input').css('width', 'inherit');
buildTagsFilter([]);

function buildTagsFilter(tags) {
    for (var i = 0; i < tags.length; i++)
        tags[i] = {
            id: i,
            text: tags[i]
        };
    filtertags = tags;
}
$(".ui-use-tags").on('change', function () {
    var tags = [];
    var data = $(this).select2('data');
    for (var i = 0; i < data.length; i++)
        tags.push(data[i].text);
    if (tags.length > 0) {
        historyList.filter(function (item) {
            var values = item.values();
            if (!values.tags) return false;
            var found = false;
            for (var i = 0; i < tags.length; i++) {
                if (values.tags.indexOf(tags[i]) != -1) {
                    found = true;
                    break;
                }
            }
            return found;
        });
    } else {
        historyList.filter();
    }
    checkHistoryList();
});

$('.search').keyup(function () {
    checkHistoryList();
});