import {
    CLASS,
    isValue,
    isFunction,
    isString,
    isUndefined,
    isDefined,
    ceil10,
    asHalfPixel,
    diffDomain,
    isEmpty,
    notEmpty,
    getOption,
    hasValue,
    sanitise,
    getPathBox,
    ChartInternal
} from '../chartinternal.js';

const focus = function (targetIds) {
    let $$ = this.internal, candidates;

    targetIds = $$.mapToTargetIds(targetIds);
    candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))),

    this.revert();
    this.defocus();
    candidates.classed(CLASS.focused, true).classed(CLASS.defocused, false);
    if ($$.hasArcType()) {
        $$.expandArc(targetIds);
    }
    $$.toggleFocusLegend(targetIds, true);

    $$.focusedTargetIds = targetIds;
    $$.defocusedTargetIds = $$.defocusedTargetIds.filter((id) => {
        return targetIds.indexOf(id) < 0;
    });
};

const defocus = function (targetIds) {
    let $$ = this.internal, candidates;

    targetIds = $$.mapToTargetIds(targetIds);
    candidates = $$.svg.selectAll($$.selectorTargets(targetIds.filter($$.isTargetToShow, $$))),

    candidates.classed(CLASS.focused, false).classed(CLASS.defocused, true);
    if ($$.hasArcType()) {
        $$.unexpandArc(targetIds);
    }
    $$.toggleFocusLegend(targetIds, false);

    $$.focusedTargetIds = $$.focusedTargetIds.filter((id) => {
        return targetIds.indexOf(id) < 0;
    });
    $$.defocusedTargetIds = targetIds;
};

const revert = function (targetIds) {
    let $$ = this.internal, candidates;

    targetIds = $$.mapToTargetIds(targetIds);
    candidates = $$.svg.selectAll($$.selectorTargets(targetIds)); // should be for all targets

    candidates.classed(CLASS.focused, false).classed(CLASS.defocused, false);
    if ($$.hasArcType()) {
        $$.unexpandArc(targetIds);
    }
    if ($$.config.legend_show) {
        $$.showLegend(targetIds.filter($$.isLegendToShow.bind($$)));
        $$.legend.selectAll($$.selectorLegends(targetIds))
            .filter(function () {
                return $$.d3.select(this).classed(CLASS.legendItemFocused);
            })
            .classed(CLASS.legendItemFocused, false);
    }

    $$.focusedTargetIds = [];
    $$.defocusedTargetIds = [];
};

export { focus, defocus, revert };