(function (window, document) {
    "use strict";

    var api = window.SIGBitacora = window.SIGBitacora || {};

    window.SIGBitacoraFeed = api;

    function hasClass(element, className) {
        return element &&
            element.classList &&
            element.classList.contains(className);
    }

    function findToggle(element, container) {
        var current = element;

        while (current && current !== container) {
            if (hasClass(current, "js-sig-bitacora-toggle")) {
                return current;
            }

            current = current.parentNode;
        }

        return null;
    }

    function getControlledPanel(toggle, container) {
        var panelId = toggle.getAttribute("aria-controls");
        var panel;

        if (!panelId) {
            return null;
        }

        panel = document.getElementById(panelId);

        if (!panel ||
            !hasClass(panel, "sig-bitacora-details") ||
            !container.contains(panel)) {
            return null;
        }

        return panel;
    }

    function setExpanded(toggle, panel, expanded) {
        var label = toggle.querySelector(
            ".sig-bitacora-detail-toggle-label");

        toggle.setAttribute(
            "aria-expanded",
            expanded ? "true" : "false");
        toggle.setAttribute(
            "title",
            expanded
                ? "Ocultar el detalle del movimiento"
                : "Mostrar el detalle del movimiento");

        if (label) {
            label.textContent = expanded
                ? "Ocultar detalle"
                : "Ver detalle";
        }

        panel.hidden = !expanded;
        panel.setAttribute(
            "aria-hidden",
            expanded ? "false" : "true");
    }

    function toggleDetails(toggle, container) {
        var panel = getControlledPanel(toggle, container);
        var expanded;

        if (!panel) {
            return;
        }

        expanded = toggle.getAttribute("aria-expanded") === "true";
        setExpanded(toggle, panel, !expanded);
    }

    function isActivationKey(event) {
        var key = event.key;
        var keyCode = event.which || event.keyCode;

        return key === "Enter" ||
            key === " " ||
            key === "Spacebar" ||
            keyCode === 13 ||
            keyCode === 32;
    }

    function hasNativeKeyboardActivation(element, event) {
        var tagName = element.tagName;
        var key = event.key;
        var keyCode = event.which || event.keyCode;

        if (tagName === "BUTTON" || tagName === "INPUT") {
            return true;
        }

        return tagName === "A" &&
            element.hasAttribute("href") &&
            (key === "Enter" || keyCode === 13);
    }

    function synchronizeToggle(toggle, container) {
        var panel = getControlledPanel(toggle, container);
        var ariaExpanded;
        var expanded;

        if (!panel) {
            toggle.setAttribute("aria-expanded", "false");
            return;
        }

        ariaExpanded = toggle.getAttribute("aria-expanded");

        if (ariaExpanded === "true") {
            expanded = true;
        } else if (ariaExpanded === "false") {
            expanded = false;
        } else {
            expanded = !panel.hidden;
        }

        setExpanded(toggle, panel, expanded);
    }

    function initializeContainer(container) {
        var toggles;
        var index;

        if (container.getAttribute(
            "data-sig-bitacora-initialized") === "1") {
            return;
        }

        toggles = container.querySelectorAll(
            ".js-sig-bitacora-toggle");

        for (index = 0; index < toggles.length; index += 1) {
            synchronizeToggle(toggles[index], container);
        }

        container.addEventListener("click", function (event) {
            var toggle = findToggle(event.target, container);

            if (!toggle) {
                return;
            }

            toggleDetails(toggle, container);
        });

        container.addEventListener("keydown", function (event) {
            var toggle = findToggle(event.target, container);

            if (!toggle ||
                !isActivationKey(event) ||
                event.repeat ||
                hasNativeKeyboardActivation(toggle, event)) {
                return;
            }

            event.preventDefault();
            toggleDetails(toggle, container);
        });

        container.setAttribute(
            "data-sig-bitacora-initialized",
            "1");
    }

    function collectContainers(root) {
        var containers = [];
        var descendants;
        var index;

        if (!root) {
            return containers;
        }

        if (root.nodeType === 1 &&
            hasClass(root, "js-sig-bitacora")) {
            containers.push(root);
        }

        if (!root.querySelectorAll) {
            return containers;
        }

        descendants = root.querySelectorAll(
            ".js-sig-bitacora:not([data-sig-bitacora-initialized=\"1\"])");

        for (index = 0; index < descendants.length; index += 1) {
            containers.push(descendants[index]);
        }

        return containers;
    }

    api.initialize = function (root) {
        var containers = collectContainers(root || document);
        var index;

        for (index = 0; index < containers.length; index += 1) {
            initializeContainer(containers[index]);
        }
    };

    api.collapseAll = function (containerReference) {
        var container = typeof containerReference === "string"
            ? document.querySelector(containerReference)
            : containerReference;
        var toggles;
        var panel;
        var index;

        if (!container ||
            !hasClass(container, "js-sig-bitacora")) {
            return;
        }

        toggles = container.querySelectorAll(
            ".js-sig-bitacora-toggle");

        for (index = 0; index < toggles.length; index += 1) {
            panel = getControlledPanel(toggles[index], container);

            if (panel) {
                setExpanded(toggles[index], panel, false);
            }
        }
    };

    if (window.SIG_BITACORA_INITIALIZATION_BRIDGE_REGISTERED !== true) {
        window.SIG_BITACORA_INITIALIZATION_BRIDGE_REGISTERED = true;

        if (window.Sys && Sys.Application) {
            Sys.Application.add_load(function () {
                api.initialize(document);
            });
        } else if (document.readyState === "loading") {
            document.addEventListener("DOMContentLoaded", function () {
                api.initialize(document);
            });
        } else {
            api.initialize(document);
        }
    }
}(window, document));