var admin = (function () {

var exports = {};
var all_streams = [];

exports.show_or_hide_menu_item = function () {
    var item = $('.admin-menu-item').expectOne();
    if (page_params.is_admin) {
        item.show();
    } else {
        item.hide();
    }
};

function failed_listing_users(xhr, error) {
    loading.destroy_indicator($('#subs_page_loading_indicator'));
    ui.report_error("Error listing users or bots", xhr, $("#administration-status"));
}

function failed_listing_streams(xhr, error) {
    ui.report_error("Error listing streams", xhr, $("#administration-status"));
}

function failed_listing_emoji(xhr, error) {
    ui.report_error("Error listing emoji", xhr, $("#administration-status"));
}

function populate_users (realm_people_data) {
    var users_table = $("#admin_users_table");
    var deactivated_users_table = $("#admin_deactivated_users_table");
    var bots_table = $("#admin_bots_table");
    // Clear table rows, but not the table headers
    users_table.find("tr.user_row").remove();
    deactivated_users_table.find("tr.user_row").remove();
    bots_table.find("tr.user_row").remove();

    var active_users = [];
    var deactivated_users = [];
    var bots = [];
    _.each(realm_people_data.members, function (user) {
        user.is_active_human = user.is_active && !user.is_bot;
        if (user.is_bot) {
            bots.push(user);
        } else if (user.is_active) {
            active_users.push(user);
        } else {
            deactivated_users.push(user);
        }
    });

    active_users = _.sortBy(active_users, 'full_name');
    deactivated_users = _.sortBy(deactivated_users, 'full_name');
    bots = _.sortBy(bots, 'full_name');

    _.each(bots, function (user) {
        bots_table.append(templates.render("admin_user_list", {user: user}));
    });
    _.each(active_users, function (user) {
        users_table.append(templates.render("admin_user_list", {user: user}));
    });
    _.each(deactivated_users, function (user) {
        deactivated_users_table.append(templates.render("admin_user_list", {user: user}));
    });
    loading.destroy_indicator($('#admin_page_users_loading_indicator'));
    loading.destroy_indicator($('#admin_page_bots_loading_indicator'));
    loading.destroy_indicator($('#admin_page_deactivated_users_loading_indicator'));
}

function populate_streams (streams_data) {
    var streams_table = $("#admin_streams_table").expectOne();
    all_streams = streams_data;
    streams_table.find("tr.stream_row").remove();
    _.each(streams_data.streams, function (stream) {
        streams_table.append(templates.render("admin_streams_list", {stream: stream}));
    });
    loading.destroy_indicator($('#admin_page_streams_loading_indicator'));
}

function populate_default_streams(streams_data) {
    var default_streams_table = $("#admin_default_streams_table").expectOne();
    _.each(streams_data, function (stream) {
        default_streams_table.append(templates.render("admin_default_streams_list", {stream: stream}));
    });
    loading.destroy_indicator($('#admin_page_default_streams_loading_indicator'));
}

function get_non_default_streams_names(streams_data) {
    var non_default_streams_names = [];
    var default_streams_names = [];

    _.each(page_params.realm_default_streams, function (default_stream) {
        default_streams_names.push(default_stream.name);
    });

    _.each(streams_data.streams, function (stream) {
        if (default_streams_names.indexOf(stream.name) < 0) {
           non_default_streams_names.push(stream.name);
        }
    });
    return non_default_streams_names;
}

exports.update_default_streams_table = function () {
    $("#admin_default_streams_table").expectOne().find("tr.default_stream_row").remove();
    populate_default_streams(page_params.realm_default_streams);
};

function make_stream_default(stream_name) {
    var data = {
        stream_name: stream_name
    };
    var default_streams_table = $("#admin_default_streams_table").expectOne();

    channel.put({
        url: '/json/default_streams',
        data: data,
        error: function (xhr, error_type) {
            if (xhr.status.toString().charAt(0) === "4") {
                $(".active_stream_row button").closest("td").html(
                    $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg));
            } else {
                $(".active_stream_row button").text("Failed!");
            }
        }
    });
}

exports.populate_emoji = function (emoji_data) {
    var emoji_table = $('#admin_emoji_table').expectOne();
    emoji_table.find('tr.emoji_row').remove();
    _.each(emoji_data, function (data, name) {
        emoji_table.append(templates.render('admin_emoji_list', {emoji: {name: name, source_url: data.source_url,
                                                                         display_url: data.display_url}}));
    });
    loading.destroy_indicator($('#admin_page_emoji_loading_indicator'));
};

exports.setup_page = function () {
    var options = {
        realm_name:                 page_params.realm_name,
        domain:                     page_params.domain,
        realm_restricted_to_domain: page_params.realm_restricted_to_domain,
        realm_invite_required:      page_params.realm_invite_required,
        realm_invite_by_admins_only: page_params.realm_invite_by_admins_only,
        realm_create_stream_by_admins_only: page_params.realm_create_stream_by_admins_only
    };
    var admin_tab = templates.render('admin_tab', options);
    $("#administration").html(admin_tab);
    $("#administration-status").expectOne().hide();
    $("#admin-realm-name-status").expectOne().hide();
    $("#admin-realm-restricted-to-domain-status").expectOne().hide();
    $("#admin-realm-invite-required-status").expectOne().hide();
    $("#admin-realm-invite-by-admins-only-status").expectOne().hide();
    $("#admin-realm-create-stream-by-admins-only-status").expectOne().hide();
    $("#admin-emoji-status").expectOne().hide();
    $("#admin-emoji-name-status").expectOne().hide();
    $("#admin-emoji-url-status").expectOne().hide();

    // create loading indicators
    loading.make_indicator($('#admin_page_users_loading_indicator'));
    loading.make_indicator($('#admin_page_bots_loading_indicator'));
    loading.make_indicator($('#admin_page_streams_loading_indicator'));
    loading.make_indicator($('#admin_page_deactivated_users_loading_indicator'));
    loading.make_indicator($('#admin_page_emoji_loading_indicator'));

    // Populate users and bots tables
    channel.get({
        url:      '/json/users',
        idempotent: true,
        timeout:  10*1000,
        success: populate_users,
        error: failed_listing_users
    });

    // Populate streams table
    channel.get({
        url:      '/json/streams?include_public=true&include_subscribed=true&include_default=true',
        timeout:  10*1000,
        idempotent: true,
        success: populate_streams,
        error: failed_listing_streams
    });

    // Populate emoji table
    exports.populate_emoji(page_params.realm_emoji);
    exports.update_default_streams_table();

    // Setup click handlers
    $(".admin_user_table").on("click", ".deactivate", function (e) {
        e.preventDefault();
        e.stopPropagation();

        $(".active_user_row").removeClass("active_user_row");
        var row = $(e.target).closest(".user_row");
        row.addClass("active_user_row");

        var user_name = row.find('.user_name').text();
        var email = row.find('.email').text();

        $("#deactivation_user_modal .email").text(email);
        $("#deactivation_user_modal .user_name").text(user_name);
        $("#deactivation_user_modal").modal("show");
    });

    $(".admin_stream_table").on("click", ".deactivate", function (e) {
        e.preventDefault();
        e.stopPropagation();

        $(".active_stream_row").removeClass("active_stream_row");
        var row = $(e.target).closest(".stream_row");
        row.addClass("active_stream_row");

        var stream_name = row.find('.stream_name').text();

        $("#deactivation_stream_modal .stream_name").text(stream_name);
        $("#deactivation_stream_modal").modal("show");
    });

    $(".admin_default_stream_table").on("click", ".remove-default-stream", function (e) {
        e.preventDefault();
        e.stopPropagation();

        $(".active_default_stream_row").removeClass("active_default_stream_row");
        var row = $(e.target).closest(".default_stream_row");
        row.addClass("active_default_stream_row");
        var stream_name = row.find('.default_stream_name').text();

        channel.del({
            url: '/json/default_streams'+ '?' + $.param({"stream_name": stream_name}),
            error: function (xhr, error_type) {
                if (xhr.status.toString().charAt(0) === "4") {
                    $(".active_default_stream_row button").closest("td").html(
                    $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg));
                } else {
                    $(".active_default_stream_row button").text("Failed!");
                }
            },
            success: function () {
                var row = $(".active_default_stream_row");
                row.remove();
            }
        });
    });

    $('.create_default_stream').keypress(function (e) {
        if (e.which === 13) {
            e.preventDefault();
            e.stopPropagation();
        }
    });

    $('.create_default_stream').typeahead({
        items: 5,
        fixed: true,
        source: function (query) {
            return get_non_default_streams_names(all_streams);
        },
        highlight: true,
        updater: function (stream_name) {
            make_stream_default(stream_name);
        }
    });

    $(".admin_bot_table").on("click", ".deactivate", function (e) {
        e.preventDefault();
        e.stopPropagation();

        $(".active_user_row").removeClass("active_user_row");
        var row = $(e.target).closest(".user_row");
        row.addClass("active_user_row");

        var user_name = row.find('.user_name').text();
        var email = row.find('.email').text();
        channel.del({
            url: '/json/bots/' + email,
            error: function (xhr, error_type) {
                if (xhr.status.toString().charAt(0) === "4") {
                    row.find("button").closest("td").html(
                        $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg)
                    );
                } else {
                    row.find("button").text("Failed!");
                }
            },
            success: function () {
                var button = row.find("button.deactivate");
                button.addClass("btn-warning");
                button.removeClass("btn-danger");
                button.addClass("reactivate");
                button.removeClass("deactivate");
                button.text("Reactivate");
                row.addClass("deactivated_user");
            }
        });
    });

    $(".admin_user_table, .admin_bot_table").on("click", ".reactivate", function (e) {
        e.preventDefault();
        e.stopPropagation();

        // Go up the tree until we find the user row, then grab the email element
        $(".active_user_row").removeClass("active_user_row");
        var row = $(e.target).closest(".user_row");
        row.addClass("active_user_row");

        var email = row.find('.email').text();
        channel.post({
            url: '/json/users/' + email + "/reactivate",
            error: function (xhr, error_type) {
                var button = row.find("button");
                if (xhr.status.toString().charAt(0) === "4") {
                    button.closest("td").html(
                        $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg)
                    );
                } else {
                     button.text("Failed!");
                }
            },
            success: function () {
                var button = row.find("button.reactivate");
                button.addClass("btn-danger");
                button.removeClass("btn-warning");
                button.addClass("deactivate");
                button.removeClass("reactivate");
                button.text("Deactivate");
                row.removeClass("deactivated_user");
            }
        });
    });

    $("#id_realm_invite_required").change(function () {
        if (this.checked) {
            $("#id_realm_invite_by_admins_only").removeAttr("disabled");
            $("#id_realm_invite_by_admins_only_label").removeClass("control-label-disabled");
        } else {
            $("#id_realm_invite_by_admins_only").attr("disabled", true);
            $("#id_realm_invite_by_admins_only_label").addClass("control-label-disabled");
        }
    });

    $(".administration").on("submit", "form.admin-realm-form", function (e) {
        var name_status = $("#admin-realm-name-status").expectOne();
        var restricted_to_domain_status = $("#admin-realm-restricted-to-domain-status").expectOne();
        var invite_required_status = $("#admin-realm-invite-required-status").expectOne();
        var invite_by_admins_only_status = $("#admin-realm-invite-by-admins-only-status").expectOne();
        var create_stream_by_admins_only_status = $("#admin-realm-create-stream-by-admins-only-status").expectOne();
        name_status.hide();
        restricted_to_domain_status.hide();
        invite_required_status.hide();
        invite_by_admins_only_status.hide();
        create_stream_by_admins_only_status.hide();

        e.preventDefault();
        e.stopPropagation();

        var new_name = $("#id_realm_name").val();
        var new_restricted = $("#id_realm_restricted_to_domain").prop("checked");
        var new_invite = $("#id_realm_invite_required").prop("checked");
        var new_invite_by_admins_only = $("#id_realm_invite_by_admins_only").prop("checked");
        var new_create_stream_by_admins_only = $("#id_realm_create_stream_by_admins_only").prop("checked");

        var url = "/json/realm";
        var data = {
            name: JSON.stringify(new_name),
            restricted_to_domain: JSON.stringify(new_restricted),
            invite_required: JSON.stringify(new_invite),
            invite_by_admins_only: JSON.stringify(new_invite_by_admins_only),
            create_stream_by_admins_only: JSON.stringify(new_create_stream_by_admins_only)
        };

        channel.patch({
            url: url,
            data: data,
            success: function (data) {
                if (data.name !== undefined) {
                    ui.report_success("Name changed!", name_status);
                }
                if (data.restricted_to_domain !== undefined) {
                    if (data.restricted_to_domain) {
                        ui.report_success("New users must have @" + page_params.domain + " e-mails!", restricted_to_domain_status);
                    } else {
                        ui.report_success("New users may have arbitrary e-mails!", restricted_to_domain_status);
                    }
                }
                if (data.invite_required !== undefined) {
                    if (data.invite_required) {
                        ui.report_success("New users must be invited by e-mail!", invite_required_status);
                    } else {
                        ui.report_success("New users may sign up online!", invite_required_status);
                    }
                }
                if (data.invite_by_admins_only !== undefined) {
                    if (data.invite_by_admins_only) {
                        ui.report_success("New users must be invited by an admin!", invite_by_admins_only_status);
                    } else {
                        ui.report_success("Any user may now invite new users!", invite_by_admins_only_status);
                    }
                }
                if (data.create_stream_by_admins_only !== undefined) {
                    if (data.create_stream_by_admins_only) {
                        ui.report_success("Only Admins may now create new streams!", create_stream_by_admins_only_status);
                    } else {
                        ui.report_success("Any user may now create new streams!", create_stream_by_admins_only_status);
                    }
                }
            },
            error: function (xhr, error) {
                ui.report_error("Failed!", xhr, name_status);
            }
        });
    });

    $(".admin_user_table").on("click", ".make-admin", function (e) {
        e.preventDefault();
        e.stopPropagation();

        // Go up the tree until we find the user row, then grab the email element
        $(".active_user_row").removeClass("active_user_row");
        var row = $(e.target).closest(".user_row");
        row.addClass("active_user_row");
        var email = row.find('.email').text();

        var url = "/json/users/" + email;
        var data = {
            is_admin: JSON.stringify(true)
        };

        channel.patch({
            url: url,
            data: data,
            success: function () {
                var button = row.find("button.make-admin");
                button.addClass("btn-danger");
                button.removeClass("btn-warning");
                button.addClass("remove-admin");
                button.removeClass("make-admin");
                button.text("Remove admin");
            },
            error: function (xhr, error) {
                var status = row.find(".admin-user-status");
                ui.report_error("Failed!", xhr, status);
            }
        });
    });

    $(".admin_user_table").on("click", ".remove-admin", function (e) {
        e.preventDefault();
        e.stopPropagation();

        // Go up the tree until we find the user row, then grab the email element
        $(".active_user_row").removeClass("active_user_row");
        var row = $(e.target).closest(".user_row");
        row.addClass("active_user_row");
        var email = row.find('.email').text();

        var url = "/json/users/" + email;
        var data = {
            is_admin: JSON.stringify(false)
        };

        channel.patch({
            url: url,
            data: data,
            success: function () {
                var button = row.find("button.remove-admin");
                button.addClass("btn-warning");
                button.removeClass("btn-danger");
                button.addClass("make-admin");
                button.removeClass("remove-admin");
                button.text("Make admin");
            },
            error: function (xhr, error) {
                var status = row.find(".admin-user-status");
                ui.report_error("Failed!", xhr, status);
            }
        });
    });

    $("#do_deactivate_user_button").click(function (e) {
        var row = $(".active_user_row");
        var email = row.find(".email").text();
        if ($("#deactivation_user_modal .email").html() !== email) {
            blueslip.error("User deactivation canceled due to non-matching fields.");
            ui.report_message("Deactivation encountered an error. Please reload and try again.",
               $("#home-error"), 'alert-error');
        }
        $("#deactivation_user_modal").modal("hide");
        row.find("button").prop("disabled", true).text("Working…");
        channel.del({
            url: '/json/users/' + email,
            error: function (xhr, error_type) {
                if (xhr.status.toString().charAt(0) === "4") {
                    row.find("button").closest("td").html(
                        $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg)
                    );
                } else {
                     row.find("button").text("Failed!");
                }
            },
            success: function () {
                var button = row.find("button.deactivate");
                button.prop("disabled", false);
                button.addClass("btn-warning");
                button.removeClass("btn-danger");
                button.addClass("reactivate");
                button.removeClass("deactivate");
                button.text("Reactivate");
                row.addClass("deactivated_user");
                row.find(".user-admin-settings").hide();
            }
        });
    });

    $("#do_deactivate_stream_button").click(function (e) {
        if ($("#deactivation_stream_modal .stream_name").text() !== $(".active_stream_row").find('.stream_name').text()) {
            blueslip.error("Stream deactivation canceled due to non-matching fields.");
            ui.report_message("Deactivation encountered an error. Please reload and try again.",
               $("#home-error"), 'alert-error');
        }
        $("#deactivation_stream_modal").modal("hide");
        $(".active_stream_row button").prop("disabled", true).text("Working…");
        channel.del({
            url: '/json/streams/' + encodeURIComponent($(".active_stream_row").find('.stream_name').text()),
            error: function (xhr, error_type) {
                if (xhr.status.toString().charAt(0) === "4") {
                    $(".active_stream_row button").closest("td").html(
                        $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg)
                    );
                } else {
                     $(".active_stream_row button").text("Failed!");
                }
            },
            success: function () {
                var row = $(".active_stream_row");
                row.remove();
            }
        });
    });

    $('.admin_emoji_table').on('click', '.delete', function (e) {
        e.preventDefault();
        e.stopPropagation();
        var btn = $(this);

        channel.del({
            url: '/json/realm/emoji/' + encodeURIComponent(btn.attr('data-emoji-name')),
            error: function (xhr, error_type) {
                if (xhr.status.toString().charAt(0) === "4") {
                    btn.closest("td").html(
                        $("<p>").addClass("text-error").text($.parseJSON(xhr.responseText).msg)
                    );
                } else {
                     btn.text("Failed!");
                }
            },
            success: function () {
                var row = btn.parents('tr');
                row.remove();
            }
        });
    });

    $(".administration").on("submit", "form.admin-emoji-form", function (e) {
        e.preventDefault();
        e.stopPropagation();
        var emoji_status = $('#admin-emoji-status');
        var emoji_name_status = $('#admin-emoji-name-status');
        var emoji_url_status = $('#admin-emoji-url-status');
        var emoji_table = $('.admin_emoji_table');
        var emoji = {};
        $(this).serializeArray().map(function (x){emoji[x.name] = x.value;});

        channel.put({
            url: "/json/realm/emoji",
            data: $(this).serialize(),
            success: function () {
                $('#admin-emoji-status, #admin-emoji-name-status, #admin-emoji-url-status').hide();
                ui.report_success("Custom emoji added!", emoji_status);
            },
            error: function (xhr, error) {
                $('#admin-emoji-status, #admin-emoji-name-status, #admin-emoji-url-status').hide();
                var errors = $.parseJSON(xhr.responseText).msg;
                if (errors.name !== undefined) {
                    xhr.responseText = JSON.stringify({msg: errors.name});
                    ui.report_error("Failed!", xhr, emoji_name_status);
                }
                if (errors.img_url !== undefined) {
                    xhr.responseText = JSON.stringify({msg: errors.img_url});
                    ui.report_error("Failed!", xhr, emoji_url_status);
                }
                if (errors.__all__ !== undefined) {
                    xhr.responseText = JSON.stringify({msg: errors.__all__});
                    ui.report_error("Failed!", xhr, emoji_status);
                }
            }
        });
    });

};

return exports;

}());