var click_handlers = (function () {

// We don't actually export anything yet; this is just for consistency.
var exports = {};

// You won't find every click handler here, but it's a good place to start!

$(function () {

    // MOUSE MOVING DETECTION
    var clicking = false;
    var mouse_moved = false;

    function mousedown() {
        mouse_moved = false;
        clicking = true;
    }

    function mousemove() {
        if (clicking) {
            mouse_moved = true;
        }
    }

    $("#main_div").on("mousedown", ".messagebox", mousedown);
    $("#main_div").on("mousemove", ".messagebox", mousemove);

    // MESSAGE CLICKING

    function is_clickable_message_element(target) {
        return target.is("a") || target.is("img.message_inline_image") || target.is("img.twitter-avatar") ||
            target.is("div.message_length_controller") || target.is("textarea") || target.is("input") ||
            target.is("i.edit_content_button");
    }

    $("#main_div").on("click", ".messagebox", function (e) {
        if (is_clickable_message_element($(e.target))) {
            // If this click came from a hyperlink, don't trigger the
            // reply action.  The simple way of doing this is simply
            // to call e.stopPropagation() from within the link's
            // click handler.
            //
            // Unfortunately, on Firefox, this breaks Ctrl-click and
            // Shift-click, because those are (apparently) implemented
            // by adding an event listener on link clicks, and
            // stopPropagation prevents them from being called.
            return;
        }
        if (!(clicking && mouse_moved)) {
            // Was a click (not a click-and-drag).
            var row = $(this).closest(".message_row");
            var id = rows.id(row);

            if (message_edit.is_editing(id)) {
                // Clicks on a message being edited shouldn't trigger a reply.
                return;
            }

            current_msg_list.select_id(id);
            respond_to_message({trigger: 'message click'});
            e.stopPropagation();
            popovers.hide_all();
        }
        mouse_moved = false;
        clicking = false;
    });

    function toggle_star(message_id) {
        // Update the message object pointed to by the various message
        // lists.
        var message = ui.find_message(message_id);

        unread.mark_message_as_read(message);
        ui.update_starred(message.id, message.starred !== true);
        message_flags.send_starred([message], message.starred);
    }

    $("#main_div").on("click", ".star", function (e) {
        e.stopPropagation();
        popovers.hide_all();
        toggle_star(rows.id($(this).closest(".message_row")));
    });

    // MESSAGE EDITING

    $('body').on('click', '.edit_content_button', function (e) {
        var row = current_msg_list.get_row(rows.id($(this).closest(".message_row")));
        current_msg_list.select_id(rows.id(row));
        message_edit.start(row);
        e.stopPropagation();
        popovers.hide_all();
    });
    $('body').on('click','.always_visible_topic_edit,.on_hover_topic_edit', function (e) {
        var recipient_row = $(this).closest(".recipient_row");
        message_edit.start_topic_edit(recipient_row);
        e.stopPropagation();
        popovers.hide_all();
    });
    $("body").on("click", ".topic_edit_save", function (e) {
        var recipient_row = $(this).closest(".recipient_row");
        if (message_edit.save(recipient_row, true) === true) {
            current_msg_list.hide_edit_topic(recipient_row);
        }
        e.stopPropagation();
        popovers.hide_all();
    });
    $("body").on("click", ".topic_edit_cancel", function (e) {
        var recipient_row = $(this).closest(".recipient_row");
        current_msg_list.hide_edit_topic(recipient_row);
        e.stopPropagation();
        popovers.hide_all();
    });
    $("body").on("click", ".message_edit_save", function (e) {
        var row = $(this).closest(".message_row");
        if (message_edit.save(row, false) === true) {
            // Re-fetch the message row in case .save() re-rendered the message list
            message_edit.end($(this).closest(".message_row"));
        }
        e.stopPropagation();
        popovers.hide_all();
    });
    $("body").on("click", ".message_edit_cancel", function (e) {
        var row = $(this).closest(".message_row");
        message_edit.end(row);
        e.stopPropagation();
        popovers.hide_all();
    });

    // RECIPIENT BARS

    function get_row_id_for_narrowing(narrow_link_elem) {
        var group = rows.get_closest_group(narrow_link_elem);
        var msg_id = rows.id_for_recipient_row(group);

        var nearest = current_msg_list.get(msg_id);
        var selected = current_msg_list.selected_message();
        if (util.same_recipient(nearest, selected)) {
            return selected.id;
        } else {
            return nearest.id;
        }
    }

    $("#home").on("click", ".narrows_by_recipient", function (e) {
        if (e.metaKey || e.ctrlKey) {
            return;
        }
        e.preventDefault();
        var row_id = get_row_id_for_narrowing(this);
        narrow.by_recipient(row_id, {trigger: 'message header'});
    });

    $("#home").on("click", ".narrows_by_subject", function (e) {
        if (e.metaKey || e.ctrlKey) {
            return;
        }
        e.preventDefault();
        var row_id = get_row_id_for_narrowing(this);
        narrow.by_subject(row_id, {trigger: 'message header'});
    });

    // SIDEBARS

    $("#userlist-toggle-button").on("click", function (e) {
        e.preventDefault();
        e.stopPropagation();

        var sidebarHidden = !$(".app-main .column-right").hasClass("expanded");
        popovers.hide_all();
        if (sidebarHidden) {
            popovers.show_userlist_sidebar();
        }
    });

    $("#streamlist-toggle-button").on("click", function (e) {
        e.preventDefault();
        e.stopPropagation();

        var sidebarHidden = !$(".app-main .column-left").hasClass("expanded");
        popovers.hide_all();
        if (sidebarHidden) {
            popovers.show_streamlist_sidebar();
        }
    });

    $('#user_presences').expectOne().on('click', '.selectable_sidebar_block', function (e) {
        var email = $(e.target).parents('li').attr('data-email');
        narrow.by('pm-with', email, {select_first_unread: true, trigger: 'sidebar'});
        // The preventDefault is necessary so that clicking the
        // link doesn't jump us to the top of the page.
        e.preventDefault();
        // The stopPropagation is necessary so that we don't
        // see the following sequence of events:
        // 1. This click "opens" the composebox
        // 2. This event propagates to the body, which says "oh, hey, the
        //    composebox is open and you clicked out of it, you must want to
        //    stop composing!"
        e.stopPropagation();
        // Since we're stopping propagation we have to manually close any
        // open popovers.
        popovers.hide_all();
    });

    $('#group-pms').expectOne().on('click', '.selectable_sidebar_block', function (e) {
        var emails = $(e.target).parents('li').attr('data-emails');
        narrow.by('pm-with', emails, {select_first_unread: true, trigger: 'sidebar'});
        e.preventDefault();
        e.stopPropagation();
        popovers.hide_all();
    });


    // HOME

    // Capture both the left-sidebar Home click and the tab breadcrumb Home
    $(document).on('click', "li[data-name='home']", function (e) {
        ui.change_tab_to('#home');
        narrow.deactivate();
        // We need to maybe scroll to the selected message
        // once we have the proper viewport set up
        setTimeout(navigate.maybe_scroll_to_selected, 0);
        e.preventDefault();
    });

    // This is obsolete, I believe.
    $(".brand").on('click', function (e) {
        if (ui.home_tab_obscured()) {
            ui.change_tab_to('#home');
        } else {
            narrow.restore_home_state();
        }
        navigate.maybe_scroll_to_selected();
        e.preventDefault();
    });

    // MISC

    $('#streams_header a').click(function (e) {
        ui.change_tab_to('#subscriptions');

        e.preventDefault();
    });

    popovers.register_click_handlers();
    notifications.register_click_handlers();

    $('.logout_button').click(function (e) {
        $('#logout_form').submit();
    });
    $('.restart_get_events_button').click(function (e) {
        server_events.restart_get_events({dont_block: true});
    });


    // COMPOSE

    // NB: This just binds to current elements, and won't bind to elements
    // created after ready() is called.
    $('#send-status .send-status-close').click(
        function () { $('#send-status').stop(true).fadeOut(500); }
    );


    $('.compose_stream_button').click(function (e) {
        compose.start('stream');
    });
    $('.compose_private_button').click(function (e) {
        compose.start('private');
    });

    $('.empty_feed_compose_stream').click(function (e) {
        compose.start('stream', {trigger: 'empty feed message'});
        e.preventDefault();
    });
    $('.empty_feed_compose_private').click(function (e) {
        compose.start('private', {trigger: 'empty feed message'});
        e.preventDefault();
    });

    function handle_compose_click(e) {
        // Don't let clicks in the compose area count as
        // "unfocusing" our compose -- in other words, e.g.
        // clicking "Press enter to send" should not
        // trigger the composebox-closing code above.
        // But do allow our formatting link.
        if (!$(e.target).is("a")) {
            e.stopPropagation();
        }
        // Still hide the popovers, however
        popovers.hide_all();
    }

    $("#compose_buttons").click(handle_compose_click);
    $(".compose-content").click(handle_compose_click);

    $("#compose_close").click(function (e) {
        compose.cancel();
    });

    // FEEDBACK

    // Keep these 2 feedback bot triggers separate because they have to
    // propagate the event differently.
    $('.feedback').click(function (e) {
        compose.start('private', { 'private_message_recipient': 'feedback@zulip.com',
                                   trigger: 'feedback menu item' });

    });
    $('#feedback_button').click(function (e) {
        e.stopPropagation();
        popovers.hide_all();
        compose.start('private', { 'private_message_recipient': 'feedback@zulip.com',
                                   trigger: 'feedback button' });

    });


    // WEBATHENA

    $('#right-sidebar, #top_navbar').on('click', '.webathena_login', function (e) {
        $("#zephyr-mirror-error").hide();
        var principal = ["zephyr", "zephyr"];
        WinChan.open({
            url: "https://webathena.mit.edu/#!request_ticket_v1",
            relay_url: "https://webathena.mit.edu/relay.html",
            params: {
                realm: "ATHENA.MIT.EDU",
                principal: principal
            }
        }, function (err, r) {
            if (err) {
                blueslip.warn(err);
                return;
            }
            if (r.status !== "OK") {
                blueslip.warn(r);
                return;
            }

            channel.post({
                url:      "/accounts/webathena_kerberos_login/",
                data:     {cred: JSON.stringify(r.session)},
                success: function (data, success) {
                    $("#zephyr-mirror-error").hide();
                },
                error: function (data, success) {
                    $("#zephyr-mirror-error").show();
                }
            });
        });
        $('#settings-dropdown').dropdown("toggle");
        e.preventDefault();
        e.stopPropagation();
    });
    // End Webathena code

    // BANKRUPTCY

    $(".bankruptcy_button").click(function (e) {
        unread.enable();
    });

    $('#yes-bankrupt').click(function (e) {
        pointer.fast_forward_pointer();
        $("#yes-bankrupt").hide();
        $("#no-bankrupt").hide();
        $(this).after($("<div>").addClass("alert alert-info settings_committed")
               .text("Bringing you to your latest messages…"));
    });

    // MAIN CLICK HANDLER

    $(document).on('click', function (e) {
        if (e.button !== 0) {
            // Firefox emits right click events on the document, but not on
            // the child nodes, so the #compose stopPropagation doesn't get a
            // chance to capture right clicks.
            return;
        }

        // Dismiss popovers if the user has clicked outside them
        if ($('.popover-inner').has(e.target).length === 0) {
            popovers.hide_all();
        }

        // Unfocus our compose area if we click out of it. Don't let exits out
        // of modals or selecting text (for copy+paste) trigger cancelling.
        if (compose.composing() && !$(e.target).is("a") &&
            ($(e.target).closest(".modal").length === 0) &&
            window.getSelection().toString() === "") {
            compose.cancel();
        }
    });

    // Workaround for Bootstrap issue #5900, which basically makes dropdowns
    // unclickable on mobile devices.
    // https://github.com/twitter/bootstrap/issues/5900
    $('a.dropdown-toggle, .dropdown-menu a').on('touchstart', function (e) {
        e.stopPropagation();
    });
});

return exports;

}());