import $ from "jquery";

import render_unsubscribe_private_stream_modal from "../templates/confirm_dialog/confirm_unsubscribe_private_stream.hbs";
import render_inline_decorated_stream_name from "../templates/inline_decorated_stream_name.hbs";
import render_selected_stream_title from "../templates/stream_settings/selected_stream_title.hbs";

import * as channel from "./channel";
import * as confirm_dialog from "./confirm_dialog";
import * as dropdown_widget from "./dropdown_widget";
import * as hash_util from "./hash_util";
import {$t, $t_html} from "./i18n";
import * as loading from "./loading";
import * as overlays from "./overlays";
import * as peer_data from "./peer_data";
import * as people from "./people";
import * as settings_config from "./settings_config";
import * as settings_data from "./settings_data";
import {current_user} from "./state_data";
import * as stream_ui_updates from "./stream_ui_updates";
import * as ui_report from "./ui_report";
import * as user_groups from "./user_groups";

export function set_right_panel_title(sub) {
    let title_icon_color = "#333333";
    if (settings_data.using_dark_theme()) {
        title_icon_color = "#dddeee";
    }

    const preview_url = hash_util.by_stream_url(sub.stream_id);
    $("#subscription_overlay .stream-info-title").html(
        render_selected_stream_title({sub, title_icon_color, preview_url}),
    );
}

export const show_subs_pane = {
    nothing_selected() {
        $(".settings, #stream-creation").hide();
        $(".nothing-selected").show();
        $("#subscription_overlay .stream-info-title").text(
            $t({defaultMessage: "Channel settings"}),
        );
    },
    settings(sub) {
        $(".settings, #stream-creation").hide();
        $(".settings").show();
        set_right_panel_title(sub);
    },
    create_stream() {
        $(".nothing-selected, .settings, #stream-creation").hide();
        $("#stream-creation").show();
        $("#subscription_overlay .stream-info-title").text($t({defaultMessage: "Create channel"}));
    },
};

export function get_active_data() {
    const $active_row = $("div.stream-row.active");
    const valid_active_id = Number.parseInt($active_row.attr("data-stream-id"), 10);
    const $active_tabs = $(".subscriptions-container").find("div.ind-tab.selected");
    return {
        $row: $active_row,
        id: valid_active_id,
        $tabs: $active_tabs,
    };
}

export let new_stream_can_remove_subscribers_group_widget = null;

export function dropdown_setup() {
    new_stream_can_remove_subscribers_group_widget = new dropdown_widget.DropdownWidget({
        widget_name: "new_stream_can_remove_subscribers_group",
        get_options: () =>
            user_groups.get_realm_user_groups_for_dropdown_list_widget(
                "can_remove_subscribers_group",
                "stream",
            ),
        item_click_callback(event, dropdown) {
            dropdown.hide();
            event.preventDefault();
            event.stopPropagation();
            new_stream_can_remove_subscribers_group_widget.render();
        },
        $events_container: $("#subscription_overlay"),
        tippy_props: {
            placement: "bottom-start",
        },
        on_mount_callback(dropdown) {
            $(dropdown.popper).css("min-width", "300px");
        },
        default_text: $t({defaultMessage: "No user groups"}),
        default_id: user_groups.get_user_group_from_name("role:administrators").id,
        unique_id_type: dropdown_widget.DataTypes.NUMBER,
    });
}

/* For the given stream_row, remove the tick and replace by a spinner. */
function display_subscribe_toggle_spinner(stream_row) {
    /* Prevent sending multiple requests by removing the button class. */
    $(stream_row).find(".check").removeClass("sub_unsub_button");

    /* Hide the tick. */
    const $tick = $(stream_row).find("svg");
    $tick.addClass("hide");

    /* Add a spinner to show the request is in process. */
    const $spinner = $(stream_row).find(".sub_unsub_status").expectOne();
    $spinner.show();
    loading.make_indicator($spinner);
}

/* For the given stream_row, add the tick and delete the spinner. */
function hide_subscribe_toggle_spinner(stream_row) {
    /* Re-enable the button to handle requests. */
    $(stream_row).find(".check").addClass("sub_unsub_button");

    /* Show the tick. */
    const $tick = $(stream_row).find("svg");
    $tick.removeClass("hide");

    /* Destroy the spinner. */
    const $spinner = $(stream_row).find(".sub_unsub_status").expectOne();
    loading.destroy_indicator($spinner);
}

export function ajaxSubscribe(stream, color, $stream_row) {
    // Subscribe yourself to a single stream.
    let true_stream_name;

    if ($stream_row !== undefined) {
        display_subscribe_toggle_spinner($stream_row);
    }
    return channel.post({
        url: "/json/users/me/subscriptions",
        data: {subscriptions: JSON.stringify([{name: stream, color}])},
        success(_resp, _statusText, xhr) {
            if (overlays.streams_open()) {
                $("#create_stream_name").val("");
            }

            const res = xhr.responseJSON;
            if (!$.isEmptyObject(res.already_subscribed)) {
                // Display the canonical stream capitalization.
                true_stream_name = res.already_subscribed[people.my_current_email()][0];
                ui_report.success(
                    $t_html(
                        {defaultMessage: "Already subscribed to {channel}"},
                        {channel: true_stream_name},
                    ),
                    $(".stream_change_property_info"),
                );
            }
            // The rest of the work is done via the subscribe event we will get

            if ($stream_row !== undefined) {
                hide_subscribe_toggle_spinner($stream_row);
            }
        },
        error(xhr) {
            if ($stream_row !== undefined) {
                hide_subscribe_toggle_spinner($stream_row);
            }
            ui_report.error(
                $t_html({defaultMessage: "Error adding subscription"}),
                xhr,
                $(".stream_change_property_info"),
            );
        },
    });
}

function ajaxUnsubscribe(sub, $stream_row) {
    // TODO: use stream_id when backend supports it
    if ($stream_row !== undefined) {
        display_subscribe_toggle_spinner($stream_row);
    }
    return channel.del({
        url: "/json/users/me/subscriptions",
        data: {subscriptions: JSON.stringify([sub.name])},
        success() {
            $(".stream_change_property_info").hide();
            // The rest of the work is done via the unsubscribe event we will get

            if ($stream_row !== undefined) {
                hide_subscribe_toggle_spinner($stream_row);
            }
        },
        error(xhr) {
            if ($stream_row !== undefined) {
                hide_subscribe_toggle_spinner($stream_row);
            }
            ui_report.error(
                $t_html({defaultMessage: "Error removing subscription"}),
                xhr,
                $(".stream_change_property_info"),
            );
        },
    });
}

export function unsubscribe_from_private_stream(sub) {
    const invite_only = sub.invite_only;
    const sub_count = peer_data.get_subscriber_count(sub.stream_id);
    const stream_name_with_privacy_symbol_html = render_inline_decorated_stream_name({stream: sub});

    const html_body = render_unsubscribe_private_stream_modal({
        unsubscribing_other_user: false,
        display_stream_archive_warning: sub_count === 1 && invite_only,
    });

    function unsubscribe_from_stream() {
        let $stream_row;
        if (overlays.streams_open()) {
            $stream_row = $(
                "#streams_overlay_container div.stream-row[data-stream-id='" + sub.stream_id + "']",
            );
        }

        ajaxUnsubscribe(sub, $stream_row);
    }

    confirm_dialog.launch({
        html_heading: $t_html(
            {defaultMessage: "Unsubscribe from <z-link></z-link>?"},
            {"z-link": () => stream_name_with_privacy_symbol_html},
        ),
        html_body,
        on_click: unsubscribe_from_stream,
    });
}

export function sub_or_unsub(sub, $stream_row) {
    if (sub.subscribed) {
        // TODO: This next line should allow guests to access web-public streams.
        if (sub.invite_only || current_user.is_guest) {
            unsubscribe_from_private_stream(sub);
            return;
        }
        ajaxUnsubscribe(sub, $stream_row);
    } else {
        ajaxSubscribe(sub.name, sub.color, $stream_row);
    }
}

export function update_public_stream_privacy_option_state($container) {
    const $public_stream_elem = $container.find(
        `input[value='${CSS.escape(settings_config.stream_privacy_policy_values.public.code)}']`,
    );
    $public_stream_elem.prop("disabled", !settings_data.user_can_create_public_streams());
}

export function hide_or_disable_stream_privacy_options_if_required($container) {
    stream_ui_updates.update_web_public_stream_privacy_option_state($container);

    update_public_stream_privacy_option_state($container);

    stream_ui_updates.update_private_stream_privacy_option_state($container);
}