var archive = (function () {

var exports = {};

function should_separate_into_groups(current_msg_time, next_msg_time) {
    var current_time = new XDate(current_msg_time * 1000);
    var next_time = new XDate(next_msg_time * 1000);
    return current_time.toDateString() !== next_time.toDateString();
}

function all_message_timestamps_to_human_readable() {
    $('.message_time').each(function () {
        var time = new XDate(parseInt($(this).text(), 10) * 1000);
        $(this).text(time.toString('h:mm TT'));
    });
}


exports.initialize = function () {
    var all_message_groups = [];
    var current_message_group = {};
    var today = new XDate();
    var recipient_and_topic = $('#display_recipient').html();
    var stream_name = recipient_and_topic.split('-')[0];
    var topic = recipient_and_topic.split('-')[1];
    var recipient_color = stream_color.pick_color([]);
    current_message_group.message_containers = [];
    current_message_group.show_date_separator = false;
    current_message_group.display_recipient = stream_name;
    current_message_group.subject = topic;
    current_message_group.background_color = recipient_color;

    function separate_into_groups(current_message_row, cur_msg_time, next_msg_time) {
        var time = new XDate(next_msg_time * 1000);
        var prev_time = new XDate(cur_msg_time * 1000);
        current_message_group.message_containers.push(current_message_row[0].outerHTML);
        var date_element = timerender.render_date(prev_time, undefined, today)[0];
        current_message_group.date = date_element.outerHTML;
        all_message_groups.push(current_message_group);
        current_message_group = {};
        current_message_group.message_containers = [];
        current_message_group.show_date = (
            timerender.render_date(time, prev_time, today))[0].outerHTML;
        current_message_group.show_date_separator = true;
        current_message_group.display_recipient = stream_name;
        current_message_group.subject = topic;
        current_message_group.background_color = recipient_color;
    }

    $('.message_row').each(function () {
        var current_message_row = $(this);
        var cur_msg_time = parseInt(current_message_row.find('.message_time').first().html(), 10);
        var next_msg_time = parseInt(current_message_row.next().find('.message_time').first().html(), 10);

        if (current_message_row.next().length === 0) {
            separate_into_groups(current_message_row, cur_msg_time);
            return;
        }

        if (should_separate_into_groups(cur_msg_time, next_msg_time)) {
            separate_into_groups(current_message_row, cur_msg_time, next_msg_time);
            return;
        }
        current_message_group.message_containers.push(current_message_row[0].outerHTML);
        var time = new XDate(cur_msg_time * 1000);
        var date_element = timerender.render_date(time, undefined, today)[0];
        current_message_group.date = date_element.outerHTML;
    });

    var context = {
        message_groups: all_message_groups,
    };
    var message_groups_html = templates.render('archive_message_group', context);
    $('.message_row').each(function () {
        $(this).detach();
    });
    $('.message_table').prepend(message_groups_html);
    $('.messagebox').css('box-shadow', 'inset 2px 0px 0px 0px ' + recipient_color);
    $('#display_recipient').remove();

    // Fixing include_sender after rendering groups.
    var prev_sender;
    $('.recipient_row').each(function () {
        if (prev_sender !== undefined) {
            var first_group_msg = $(this).find('.message_row').first();
            var message_sender = first_group_msg.find('.message_sender');
            if (! message_sender.find('.inline_profile_picture').length) {
                message_sender.replaceWith(prev_sender.clone());
            }
        }
        var all_senders = $(this).find('.message_sender').has('.inline_profile_picture');
        prev_sender = all_senders.last();
    });

    $('.app').scrollTop($('.app').height());
    all_message_timestamps_to_human_readable();
};

return exports;

}());

var current_msg_list = {
    selected_row: function () {
        return $('.message_row').last();
    },
};
var rows = {
    get_message_recipient_row: function (message_row) {
        return $(message_row).parent('.recipient_row');
    },
    first_message_in_group: function (message_group) {
        return $('div.message_row:first', message_group);
    },
    id: function (message_row) {
        return parseFloat(message_row.attr('zid'));
    },
};

if (typeof module !== 'undefined') {
    module.exports.current_msg_list = current_msg_list;
    module.exports.rows = rows;
    module.exports = archive;
}

var scroll_timer;
function scroll_finish() {
    clearTimeout(scroll_timer);
    scroll_timer = setTimeout(floating_recipient_bar.update, 100);
}

$(function () {
    $.fn.safeOuterHeight = function () {
        return $(this).outerHeight.apply(this, arguments) || 0;
    };
    $.fn.safeOuterWidth = function () {
        return $(this).outerWidth.apply(this, arguments) || 0;
    };
    $('.app').scroll(_.throttle(function () {
        scroll_finish();
    }, 50));
    archive.initialize();
});