// ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
// ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
// ┃ ▄▄▄▄▄█ █▄▄▄▄▄ ▄▄▄▄▄█  ▀▀▀▀▀█▀▀▀▀▀ █ ▀▀▀▀▀█ ████████▌▐███ ███▄  ▀█ █ ▀▀▀▀▀ ┃
// ┃ █▀▀▀▀▀ █▀▀▀▀▀ █▀██▀▀ ▄▄▄▄▄ █ ▄▄▄▄▄█ ▄▄▄▄▄█ ████████▌▐███ █████▄   █ ▄▄▄▄▄ ┃
// ┃ █      ██████ █  ▀█▄       █ ██████      █      ███▌▐███ ███████▄ █       ┃
// ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
// ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
// ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
// ┃ This file is part of the Perspective library, distributed under the terms ┃
// ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
// ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

import { interpolate } from "d3";
import { drawArc, arcVisible } from "./sunburstArc";
import { labelVisible, labelTransform } from "./sunburstLabel";

export const clickHandler =
    (data, g, parent, parentTitle, path, label, radius, split, settings) =>
    (p, skipTransition) => {
        settings.sunburstLevel[split] = p.data.name;
        if (p.parent) {
            parent.datum(p.parent);
            parent.style("cursor", "pointer");
            parentTitle.html(`⇪ ${p.label}`);
        } else {
            parent.datum(data);
            parent.style("cursor", "default");
            parentTitle.html("");
        }
        data.each(
            (d) =>
                (d.target = {
                    x0:
                        Math.max(
                            0,
                            Math.min(1, (d.x0 - p.x0) / (p.x1 - p.x0)),
                        ) *
                        2 *
                        Math.PI,
                    x1:
                        Math.max(
                            0,
                            Math.min(1, (d.x1 - p.x0) / (p.x1 - p.x0)),
                        ) *
                        2 *
                        Math.PI,
                    y0: Math.max(0, d.y0 - p.depth),
                    y1: Math.max(0, d.y1 - p.depth),
                }),
        );

        const t = g.transition().duration(skipTransition ? 0 : 750);
        path.transition(t)
            .tween("data", (d) => {
                const i = interpolate(d.current, d.target);
                return (t) => (d.current = i(t));
            })
            .filter(function (d) {
                return (
                    +this.getAttribute("fill-opacity") || arcVisible(d.target)
                );
            })
            .attr("fill-opacity", (d) => (arcVisible(d.target) ? 1 : 0))
            .attr("user-select", (d) =>
                arcVisible(d.target) ? "initial" : "none",
            )
            .style("pointer-events", (d) =>
                arcVisible(d.target) ? "initial" : "none",
            )
            .attrTween("d", (d) => () => drawArc(radius)(d.current));

        label
            .filter(function (d) {
                return (
                    +this.getAttribute("fill-opacity") || labelVisible(d.target)
                );
            })
            .transition(t)
            .attr("fill-opacity", (d) => +labelVisible(d.target))
            .attrTween(
                "transform",
                (d) => () => labelTransform(d.current, radius),
            );
    };