import { Browse, Select } from '../modes/index';
import { ChangeMember, DeleteMember } from '../actions/index';
import { Disclosure } from './disclosure';
import { Entity } from '../core/index';
import { Icon } from '../svg/index';
import { displayName } from '../util/index';

export function RawMemberEditor(context) {
    var id;

    function selectMember(d) {
        d3.event.preventDefault();
        context.enter(Select(context, [d.id]));
    }

    function changeRole(d) {
        var role = d3.select(this).property('value');
        var member = {id: d.id, type: d.type, role: role};
        context.perform(
            ChangeMember(d.relation.id, member, d.index),
            t('operations.change_role.annotation'));
    }

    function deleteMember(d) {
        context.perform(
            DeleteMember(d.relation.id, d.index),
            t('operations.delete_member.annotation'));

        if (!context.hasEntity(d.relation.id)) {
            context.enter(Browse(context));
        }
    }

    function rawMemberEditor(selection) {
        var entity = context.entity(id),
            memberships = [];

        entity.members.forEach(function(member, index) {
            memberships.push({
                index: index,
                id: member.id,
                type: member.type,
                role: member.role,
                relation: entity,
                member: context.hasEntity(member.id)
            });
        });

        selection.call(Disclosure()
            .title(t('inspector.all_members') + ' (' + memberships.length + ')')
            .expanded(true)
            .on('toggled', toggled)
            .content(content));

        function toggled(expanded) {
            if (expanded) {
                selection.node().parentNode.scrollTop += 200;
            }
        }

        function content($wrap) {
            var $list = $wrap.selectAll('.member-list')
                .data([0]);

            $list.enter().append('ul')
                .attr('class', 'member-list');

            var $items = $list.selectAll('li')
                .data(memberships, function(d) {
                    return Entity.key(d.relation) + ',' + d.index + ',' +
                        (d.member ? Entity.key(d.member) : 'incomplete');
                });

            var $enter = $items.enter().append('li')
                .attr('class', 'member-row form-field')
                .classed('member-incomplete', function(d) { return !d.member; });

            $enter.each(function(d) {
                if (d.member) {
                    var $label = d3.select(this).append('label')
                        .attr('class', 'form-label')
                        .append('a')
                        .attr('href', '#')
                        .on('click', selectMember);

                    $label.append('span')
                        .attr('class', 'member-entity-type')
                        .text(function(d) { return context.presets().match(d.member, context.graph()).name(); });

                    $label.append('span')
                        .attr('class', 'member-entity-name')
                        .text(function(d) { return displayName(d.member); });

                } else {
                    d3.select(this).append('label')
                        .attr('class', 'form-label')
                        .text(t('inspector.incomplete'));
                }
            });

            $enter.append('input')
                .attr('class', 'member-role')
                .property('type', 'text')
                .attr('maxlength', 255)
                .attr('placeholder', t('inspector.role'))
                .property('value', function(d) { return d.role; })
                .on('change', changeRole);

            $enter.append('button')
                .attr('tabindex', -1)
                .attr('class', 'remove button-input-action member-delete minor')
                .on('click', deleteMember)
                .call(Icon('#operation-delete'));

            $items.exit()
                .remove();
        }
    }

    rawMemberEditor.entityID = function(_) {
        if (!arguments.length) return id;
        id = _;
        return rawMemberEditor;
    };

    return rawMemberEditor;
}