matriz.ui = matriz.ui || {};
matriz.ui.CalendarioEventos = function (options) {
    
    var $calendario = $(options.datepicker.container);
    
    var eventos = [];

    this.init = function () {
        $calendario.datepicker({
            todayHighlight: true,
            format: matriz.utils.internationalization.translate("dd/mm/yyyy", "localization"),
            language: $("html").attr("lang")
        }).on("show render", function (e) {
            atualizaEventos(e.date);
        }).datepicker("show");
    };
    
    function atualizaEventos(date) {
        $calendario.addClass("disabled").removeClass("active");
        
        if (!eventos.length) {
            var parametros = '';
            if ($("#codigoExternoCalendarioEvento").length) {
                parametros = '?codigoexterno=' + $("#codigoExternoCalendarioEvento").val();
            }
            matriz.utils.ajax({
                url: "/_service/site/listevento" + parametros
            }).done(function (response) {
                eventos = response.itens;
                redesenhaEventos(date);
            });
        } else {
            redesenhaEventos(date);
        }
    }
    
    function redesenhaEventos(date) {
        var dateNow = (new Date(date));
        var dateOldMonth = (new Date(date)).addMonths(-1);
        var dateNewMonth = (new Date(date)).addMonths(1);
        
        $calendario.find(".day").removeClass("active").each(function (dayIndex, dayElement) {
            var $dayElement = $(dayElement);
            var calendarioDate;

            if ($dayElement.hasClass("old")) {
                calendarioDate = dateOldMonth;
            } else if ($dayElement.hasClass("new")) {
                calendarioDate = dateNewMonth;
            } else {
                calendarioDate = dateNow;
            }

            calendarioDate.setDate(parseInt($dayElement.text()));

            if (dataPossuiEvento(calendarioDate)) {
                addLinkEvento($dayElement, calendarioDate);
            } else {
                $dayElement.addClass("disabled");
            }
        });
    }
    
    function dataPossuiEvento(date) {
        var calendarioDate = date.toLocaleDateString();

        for (var eventoID in eventos) {
            var evento = eventos[eventoID];
            var eventoDate = new Date(evento.timestamp * 1000);

            for (var dia = 0; dia <= evento.dias; dia++) {
                if (eventoDate.toLocaleDateString() === calendarioDate) {
                    return true;
                }

                eventoDate = eventoDate.addDays(1);
            }
        }

        return false;
    }

    function addLinkEvento($element, date) {
        $element.empty();
        $element.addClass("day_event");
        $("<a>")
                .attr("href", "/eventos?datahoraini=".concat(encodeURIComponent(date.toLocaleDateString())).concat("&ordem=EVENTOSANTIGOS"))
                .text(parseInt(date.getDate()))
                .on("click", function (e) {
                    e.stopPropagation();
                    location.href = this.href;
                    return false;
                }).appendTo($element);
    }
};

$.fn.matrizCalendarioEventos = function () {
    if (this.length > 0) {
        $(this).each(function (idx, container) {
            var calendarioEventos = new matriz.ui.CalendarioEventos({
                "datepicker": {
                    "container": container
                }
            });
            calendarioEventos.init();
        });
    }
    return this;
};