var render_muted_topic_ui_row = require('../templates/muted_topic_ui_row.hbs');
var render_topic_muted = require('../templates/topic_muted.hbs');

function timestamp_ms() {
    return (new Date()).getTime();
}

var last_topic_update = 0;

exports.rerender = function () {
    // Note: We tend to optimistically rerender muting preferences before
    // the back end actually acknowledges the mute.  This gives a more
    // immediate feel to the user, and if the back end fails temporarily,
    // re-doing a mute or unmute is a pretty recoverable thing.

    stream_list.update_streams_sidebar();
    if (current_msg_list.muting_enabled) {
        current_msg_list.update_muting_and_rerender();
    }
    if (current_msg_list !== home_msg_list) {
        home_msg_list.update_muting_and_rerender();
    }
};

exports.persist_mute = function (stream_id, topic_name) {
    var data = {
        stream_id: stream_id,
        topic: topic_name,
        op: 'add',
    };
    last_topic_update = timestamp_ms();
    channel.patch({
        url: '/json/users/me/subscriptions/muted_topics',
        idempotent: true,
        data: data,
    });
};

exports.persist_unmute = function (stream_id, topic_name) {
    var data = {
        stream_id: stream_id,
        topic: topic_name,
        op: 'remove',
    };
    last_topic_update = timestamp_ms();
    channel.patch({
        url: '/json/users/me/subscriptions/muted_topics',
        idempotent: true,
        data: data,
    });
};

exports.handle_updates = function (muted_topics) {
    if (timestamp_ms() < last_topic_update + 1000) {
        // This topic update is either the one that we just rendered, or,
        // much less likely, it's coming from another device and would probably
        // be overwriting this device's preferences with stale data.
        return;
    }

    exports.update_muted_topics(muted_topics);
    exports.rerender();
};

exports.update_muted_topics = function (muted_topics) {
    muting.set_muted_topics(muted_topics);
    unread_ui.update_unread_counts();
};

exports.set_up_muted_topics_ui = function (muted_topics) {
    var muted_topics_table = $("#muted_topics_table tbody");
    muted_topics_table.empty();
    _.each(muted_topics, function (tup) {
        var stream_id = tup[0];
        var topic = tup[1];

        var stream = stream_data.maybe_get_stream_name(stream_id);

        if (!stream) {
            blueslip.warn('Unknown stream_id in set_up_muted_topics_ui: ' + stream_id);
            return;
        }

        var template_data = {
            stream: stream,
            stream_id: stream_id,
            topic: topic,
        };

        var row = render_muted_topic_ui_row(template_data);
        muted_topics_table.append(row);
    });
};

exports.mute = function (stream_id, topic) {
    var stream_name = stream_data.maybe_get_stream_name(stream_id);

    stream_popover.hide_topic_popover();
    muting.add_muted_topic(stream_id, topic);
    unread_ui.update_unread_counts();
    exports.rerender();
    exports.persist_mute(stream_id, topic);
    feedback_widget.show({
        populate: function (container) {
            var rendered_html = render_topic_muted();
            container.html(rendered_html);
            container.find(".stream").text(stream_name);
            container.find(".topic").text(topic);
        },
        on_undo: function () {
            exports.unmute(stream_id, topic);
        },
        title_text: i18n.t("Topic muted"),
        undo_button_text: i18n.t("Unmute"),
    });
    exports.set_up_muted_topics_ui(muting.get_muted_topics());
};

exports.unmute = function (stream_id, topic) {
    // we don't run a unmute_notify function because it isn't an issue as much
    // if someone accidentally unmutes a stream rather than if they mute it
    // and miss out on info.
    stream_popover.hide_topic_popover();
    muting.remove_muted_topic(stream_id, topic);
    unread_ui.update_unread_counts();
    exports.rerender();
    exports.persist_unmute(stream_id, topic);
    exports.set_up_muted_topics_ui(muting.get_muted_topics());
    feedback_widget.dismiss();
};

exports.toggle_mute = function (message) {
    var stream_id = message.stream_id;
    var topic = util.get_message_topic(message);

    if (muting.is_topic_muted(stream_id, topic)) {
        exports.unmute(stream_id, topic);
    } else if (message.type === 'stream') {
        exports.mute(stream_id, topic);
    }
};

window.muting_ui = exports;