const settings_data = require("./settings_data");
const render_admin_user_list = require("../templates/admin_user_list.hbs");
const render_bot_owner_select = require("../templates/bot_owner_select.hbs");
const render_user_info_form_modal = require('../templates/user_info_form_modal.hbs');

const meta = {
    loaded: false,
};

exports.reset = function () {
    meta.loaded = false;
};

function compare_a_b(a, b) {
    if (a > b) {
        return 1;
    } else if (a === b) {
        return 0;
    }
    return -1;
}

function sort_email(a, b) {
    const email_a = settings_data.email_for_user_settings(a) || '';
    const email_b = settings_data.email_for_user_settings(b) || '';
    return compare_a_b(
        email_a.toLowerCase(),
        email_b.toLowerCase()
    );
}

function sort_role(a, b) {
    function role(user) {
        if (user.is_admin) { return 0; }
        if (user.is_guest) { return 2; }
        return 1; // member
    }
    return compare_a_b(role(a), role(b));
}

function sort_bot_owner(a, b) {
    function owner_name(item) {
        const owner = people.get_bot_owner_user(item);

        if (!owner) {
            return '';
        }

        if (!owner.full_name) {
            return '';
        }

        return owner.full_name.toLowerCase();
    }

    return compare_a_b(
        owner_name(a),
        owner_name(b)
    );
}

function sort_last_active(a, b) {
    return compare_a_b(
        presence.last_active_date(a.id) || 0,
        presence.last_active_date(b.id) || 0
    );
}

function get_user_info_row(user_id) {
    return $("tr.user_row[data-user-id='" + user_id + "']");
}

function update_view_on_deactivate(row) {
    const button = row.find("button.deactivate");
    const user_role = row.find(".user_role");
    button.prop("disabled", false);
    row.find('button.open-user-form').hide();
    row.find('i.deactivated-user-icon').show();
    button.addClass("btn-warning reactivate");
    button.removeClass("deactivate btn-danger");
    button.html("<i class='fa fa-user-plus' aria-hidden='true'></i>");
    button.attr('title', 'Reactivate');
    row.addClass("deactivated_user");

    if (user_role) {
        const user_id = row.data('user-id');
        user_role.text("%state (%role)".replace("%state", i18n.t("Deactivated")).
            replace("%role", people.get_user_type(user_id)));
    }
}

function update_view_on_reactivate(row) {
    const button = row.find("button.reactivate");
    const user_role = row.find(".user_role");
    row.find("button.open-user-form").show();
    row.find('i.deactivated-user-icon').hide();
    button.addClass("btn-danger deactivate");
    button.removeClass("btn-warning reactivate");
    button.attr('title', 'Deactivate');
    button.html('<i class="fa fa-user-plus" aria-hidden="true"></i>');
    row.removeClass("deactivated_user");

    if (user_role) {
        const user_id = row.data('user-id');
        user_role.text(people.get_user_type(user_id));
    }
}

function get_status_field() {
    const current_tab = settings_panel_menu.org_settings.current_tab();
    switch (current_tab) {
    case 'deactivated-users-admin':
        return $("#deactivated-user-field-status").expectOne();
    case 'user-list-admin':
        return $("#user-field-status").expectOne();
    case 'bot-list-admin':
        return $("#bot-field-status").expectOne();
    default:
        blueslip.fatal("Invalid admin settings page");
    }
}


exports.update_user_data = function (user_id, new_data) {
    if (!meta.loaded) {
        return;
    }

    const user_row = get_user_info_row(user_id);

    if (new_data.full_name !== undefined) {
        // Update the full name in the table
        user_row.find(".user_name").text(new_data.full_name);
    }

    if (new_data.owner !== undefined) {
        // Update the bot owner in the table
        user_row.find(".owner").text(new_data.owner);
    }

    if (new_data.is_active !== undefined) {
        if (new_data.is_active === false) {
            // Deactivate the user/bot in the table
            update_view_on_deactivate(user_row);
        } else {
            // Reactivate the user/bot in the table
            update_view_on_reactivate(user_row);
        }
    }

    if (new_data.is_admin !== undefined || new_data.is_guest !== undefined) {
        user_row.find(".user_role").text(people.get_user_type(user_id));
    }
};

function failed_listing_users(xhr) {
    loading.destroy_indicator($('#subs_page_loading_indicator'));
    const status = get_status_field();
    ui_report.error(i18n.t("Error listing users or bots"), xhr, status);
}

function populate_users(realm_people_data) {
    let active_users = [];
    let deactivated_users = [];
    let bots = [];
    for (const user of realm_people_data.members) {
        user.is_active_human = user.is_active && !user.is_bot;
        if (user.is_bot) {
            // Convert bot type id to string for viewing to the users.
            user.bot_type = settings_bots.type_id_to_string(user.bot_type);

            const bot_owner = people.get_bot_owner_user(user);

            if (bot_owner) {
                user.bot_owner_full_name = bot_owner.full_name;
            } else {
                user.no_owner = true;
                user.bot_owner_full_name = i18n.t("No owner");
            }

            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');

    const reset_scrollbar = function ($sel) {
        return function () {
            ui.reset_scrollbar($sel);
        };
    };

    const $bots_table = $("#admin_bots_table");
    list_render.create($bots_table, bots, {
        name: "admin_bot_list",
        modifier: function (item) {
            return render_admin_user_list({
                can_modify: page_params.is_admin,
                // It's always safe to show the fake email addresses for bot users
                display_email: item.email,
                user: item,
            });
        },
        filter: {
            element: $bots_table.closest(".settings-section").find(".search"),
            predicate: function (item, value) {
                return item.full_name.toLowerCase().includes(value) ||
                item.email.toLowerCase().includes(value);
            },
            onupdate: reset_scrollbar($bots_table),
        },
        parent_container: $("#admin-bot-list").expectOne(),
        init_sort: ['alphabetic', 'full_name'],
        sort_fields: {
            email: sort_email,
            bot_owner: sort_bot_owner,
        },
    });

    function get_last_active(user) {
        const last_active_date = presence.last_active_date(user.user_id);

        if (!last_active_date) {
            return i18n.t("Unknown");
        }
        return timerender.render_now(last_active_date).time_str;
    }

    const $users_table = $("#admin_users_table");
    list_render.create($users_table, active_users, {
        name: "users_table_list",
        modifier: function (item) {
            return render_admin_user_list({
                can_modify: page_params.is_admin,
                is_current_user: people.is_my_user_id(item.user_id),
                display_email: settings_data.email_for_user_settings(item),
                user: item,
                last_active_date: get_last_active(item),
            });
        },
        filter: {
            element: $users_table.closest(".settings-section").find(".search"),
            filterer: people.filter_for_user_settings_search,
            onupdate: reset_scrollbar($users_table),
        },
        parent_container: $("#admin-user-list").expectOne(),
        init_sort: ['alphabetic', 'full_name'],
        sort_fields: {
            email: sort_email,
            last_active: sort_last_active,
            role: sort_role,
        },
    });

    const $deactivated_users_table = $("#admin_deactivated_users_table");
    list_render.create($deactivated_users_table, deactivated_users, {
        name: "deactivated_users_table_list",
        modifier: function (item) {
            return render_admin_user_list({
                user: item,
                display_email: settings_data.email_for_user_settings(item),
                can_modify: page_params.is_admin,
            });
        },
        filter: {
            element: $deactivated_users_table.closest(".settings-section").find(".search"),
            filterer: people.filter_for_user_settings_search,
            onupdate: reset_scrollbar($deactivated_users_table),
        },
        parent_container: $("#admin-deactivated-users-list").expectOne(),
        init_sort: ['alphabetic', 'full_name'],
        sort_fields: {
            email: sort_email,
            role: sort_role,
        },
    });

    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'));
    $("#admin_deactivated_users_table").show();
    $("#admin_users_table").show();
    $("#admin_bots_table").show();
}

exports.set_up = function () {
    loading.make_indicator($('#admin_page_users_loading_indicator'), {text: 'Loading...'});
    loading.make_indicator($('#admin_page_bots_loading_indicator'), {text: 'Loading...'});
    loading.make_indicator($('#admin_page_deactivated_users_loading_indicator'), {text: 'Loading...'});
    $("#admin_deactivated_users_table").hide();
    $("#admin_users_table").hide();
    $("#admin_bots_table").hide();

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

function open_user_info_form_modal(person) {
    const html = render_user_info_form_modal({
        user_id: person.user_id,
        email: person.email,
        full_name: people.get_full_name(person.user_id),
        is_admin: person.is_admin,
        is_guest: person.is_guest,
        is_member: !person.is_admin && !person.is_guest,
        is_bot: person.is_bot,
    });
    const user_info_form_modal = $(html);
    const modal_container = $('#user-info-form-modal-container');
    modal_container.empty().append(user_info_form_modal);
    overlays.open_modal('user-info-form-modal');

    if (person.is_bot) {
        // Dynamically add the owner select control in order to
        // avoid performance issues in case of large number of users.
        const users_list = people.get_active_humans();
        const owner_select = $(render_bot_owner_select({users_list: users_list}));
        owner_select.val(bot_data.get(person.user_id).owner || "");
        modal_container.find(".edit_bot_owner_container").append(owner_select);
    }

    return user_info_form_modal;
}

exports.on_load_success = function (realm_people_data) {
    meta.loaded = true;

    populate_users(realm_people_data);

    const modal_elem = $("#deactivation_user_modal").expectOne();

    $(".admin_user_table").on("click", ".deactivate", function (e) {
        // This click event must not get propagated to parent container otherwise the modal
        // will not show up because of a call to `close_active_modal` in `settings.js`.
        e.preventDefault();
        e.stopPropagation();

        const row = $(e.target).closest(".user_row");
        const user_id = row.data('user-id');
        const user = people.get_by_user_id(user_id);
        modal_elem.find(".email").text(user.email);
        modal_elem.find(".user_name").text(user.full_name);
        modal_elem.modal("show");
        modal_elem.data('user-id', user_id);
    });

    modal_elem.find('.do_deactivate_button').click(function () {
        const user_id = modal_elem.data('user-id');
        const row = get_user_info_row(user_id);

        modal_elem.modal("hide");
        const row_deactivate_button = row.find("button.deactivate");
        row_deactivate_button.prop("disabled", true).text(i18n.t("Working…"));
        const opts = {
            success_continuation: function () {
                update_view_on_deactivate(row);
            },
            error_continuation: function () {
                row_deactivate_button.text(i18n.t("Deactivate"));
            },
        };
        const status = get_status_field();
        const url = '/json/users/' + encodeURIComponent(user_id);
        settings_ui.do_settings_change(channel.del, url, {}, status, opts);

    });

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

        const button_elem = $(e.target);
        const row = button_elem.closest(".user_row");
        const bot_id = parseInt(row.attr("data-user-id"), 10);
        const url = '/json/bots/' + encodeURIComponent(bot_id);

        const opts = {
            success_continuation: function () {
                update_view_on_deactivate(row);
            },
            error_continuation: function (xhr) {
                ui_report.generic_row_button_error(xhr, button_elem);
            },
        };
        const status = get_status_field();
        settings_ui.do_settings_change(channel.del, url, {}, status, opts);

    });

    $(".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
        const button_elem = $(e.target);
        const row = button_elem.closest(".user_row");
        const user_id = parseInt(row.attr("data-user-id"), 10);
        const url = '/json/users/' + encodeURIComponent(user_id) + "/reactivate";
        const data = {};
        const status = get_status_field();

        const opts = {
            success_continuation: function () {
                update_view_on_reactivate(row);
            },
            error_continuation: function (xhr) {
                ui_report.generic_row_button_error(xhr, button_elem);
            },
        };

        settings_ui.do_settings_change(channel.post, url, data, status, opts);
    });

    $('.admin_bot_table').on('click', '.user_row .view_user_profile', function (e) {
        const owner_id = parseInt($(e.target).attr('data-owner-id'), 10);
        const owner = people.get_by_user_id(owner_id);
        popovers.show_user_profile(owner);
        e.stopPropagation();
        e.preventDefault();
    });

    $(".admin_user_table, .admin_bot_table").on("click", ".open-user-form", function (e) {
        const user_id = parseInt($(e.currentTarget).attr("data-user-id"), 10);
        const person = people.get_by_user_id(user_id);

        if (!person) {
            return;
        }

        const user_info_form_modal = open_user_info_form_modal(person);
        const element = "#user-info-form-modal .custom-profile-field-form";
        $(element).html("");
        settings_account.append_custom_profile_fields(element, user_id);
        settings_account.initialize_custom_date_type_fields(element);
        const fields_user_pills = settings_account.initialize_custom_user_type_fields(element,
                                                                                      user_id,
                                                                                      true, false);

        let url;
        let data;
        const full_name = user_info_form_modal.find("input[name='full_name']");

        user_info_form_modal.find('.submit_user_info_change').on("click", function (e) {
            e.preventDefault();
            e.stopPropagation();

            const user_role_select_value = user_info_form_modal.find('#user-role-select').val();

            const admin_status = get_status_field();
            if (person.is_bot) {
                url = "/json/bots/" + encodeURIComponent(user_id);
                data = {
                    full_name: full_name.val(),
                };
                const owner_select_value = user_info_form_modal.find('.bot_owner_select').val();
                if (owner_select_value) {
                    data.bot_owner_id = people.get_by_email(owner_select_value).user_id;
                }
            } else {
                const new_profile_data = [];
                $("#user-info-form-modal .custom_user_field_value").each(function () {
                    // Remove duplicate datepicker input element generated flatpicker library
                    if (!$(this).hasClass("form-control")) {
                        new_profile_data.push({
                            id: parseInt($(this).closest(".custom_user_field").attr("data-field-id"), 10),
                            value: $(this).val(),
                        });
                    }
                });
                // Append user type field values also
                for (const [field_id, field_pills] of  fields_user_pills) {
                    if (field_pills) {
                        const user_ids = user_pill.get_user_ids(field_pills);
                        new_profile_data.push({
                            id: field_id,
                            value: user_ids,
                        });
                    }
                }

                url = "/json/users/" + encodeURIComponent(user_id);
                data = {
                    full_name: JSON.stringify(full_name.val()),
                    is_admin: JSON.stringify(user_role_select_value === 'admin'),
                    is_guest: JSON.stringify(user_role_select_value === 'guest'),
                    profile_data: JSON.stringify(new_profile_data),
                };
            }

            settings_ui.do_settings_change(channel.patch, url, data, admin_status);
            overlays.close_modal('user-info-form-modal');
        });
    });

};

window.settings_users = exports;
