import { deepFlat } from "@daybrush/utils";
import Selecto from "lit-selecto";
import Moveable, { MoveableTargetGroupsType } from "lit-moveable";
import { GroupManager, TargetList } from "@moveable/helper";
import { LitElement, html } from "lit";
import { customElement, property, state } from "lit/decorators.js";
import { ref, createRef } from "lit/directives/ref.js";
import { repeat } from "lit/directives/repeat.js";

@customElement("lit-app")
export default class App extends LitElement {
    groupManager: GroupManager = new GroupManager([]);
    @state()
    targets: MoveableTargetGroupsType = [];
    moveableRef: Ref<Moveable> = createRef(null);
    selectoRef: Ref<Selecto> = createRef(null);
    cubes: any = [];
    constructor() {
        super();
        this.groupManager = new GroupManager([]);
        for (let i = 0; i < 30; ++i) {
            this.cubes.push(i);
        }
    }
    render() {
        return html `<div class="root">
    <div class="container">
        <button @click=${this.onClick}>Group</button>
        &nbsp;
        <button @click=${this.onClick$0}>Ungroup</button>
        <lit-moveable
            ${ref(this.moveableRef)}
            .litDraggable=${true}
            .rotatable=${true}
            .scalable=${true}
            .target=${this.targets}
            @litDrag=${this.onDrag}
            @litRenderGroup=${this.onRenderGroup}
            @litClickGroup=${this.onClickGroup}
        ></lit-moveable>
        <lit-selecto
            ${ref(this.selectoRef)}
            .dragContainer=${window}
            .selectableTargets=${[".selecto-area .cube"]}
            .hitRate=${0}
            .selectByClick=${true}
            .selectFromInside=${false}
            .toggleContinueSelect=${["shift"]}
            .ratio=${0}
            @litDragStart=${this.onDragStart}
            @litSelect=${this.onSelect}
            @litSelectEnd=${this.onSelectEnd}
        ></lit-selecto>
        <div class="elements selecto-area">${repeat(
            this.cubes,
            i => i,
            i => html `<div class="cube">${i}</div>`
        )}</div>
        <div class="empty elements"></div>
    </div>
</div>`;
    }
    firstUpdated() {
        const elements = this.selectoRef.value!.getSelectableElements();
        this.groupManager.set([], elements);
    }
    setSelectedTargets(nextTargetes: MoveableTargetGroupsType) {
        this.selectoRef.value!.setSelectedTargets(deepFlat(nextTargetes));
        this.targets = nextTargetes;
    }
    onClick() {
        const nextGroup = this.groupManager.group(this.targets, true);
        if (nextGroup) {
            this.targets = nextGroup;
        }
    }
    onClick$0() {
        const nextGroup = this.groupManager.ungroup(this.targets);
        if (nextGroup) {
            this.targets = nextGroup;
        }
    }
    onDrag(e) {
        e.target.style.transform = e.transform;
    }
    onRenderGroup(e) {
        e.events.forEach(ev => {
            ev.target.style.cssText += ev.cssText;
        });
    }
    onClickGroup(e) {
        if (!e.moveableTarget) {
            this.setSelectedTargets([]);
            return;
        }
        if (e.isDouble) {
            const childs = this.groupManager.selectSubChilds(
                this.targets,
                e.moveableTarget
            );
            this.setSelectedTargets(childs.targets());
            return;
        }
        if (e.isTrusted) {
            this.selectoRef.value!.clickTarget(
                e.inputEvent,
                e.moveableTarget
            );
        }
    }
    onDragStart(e) {
        const moveable = this.moveableRef.value!;
        const target = e.inputEvent.target;
        const flatted = deepFlat(this.targets);
        if (target.tagName === "BUTTON" || moveable.isMoveableElement(target)
            || flatted.some(t => t === target || t.contains(target))
        ) {
            e.stop();
        }
        e.data.startTargets = this.targets;
    }
    onSelect(e) {
        const { startAdded, startRemoved, isDragStartEnd } = e;
        if (isDragStartEnd) {
            return;
        }
        const nextChilds = this.groupManager.selectSameDepthChilds(
            e.data.startTargets,
            startAdded,
            startRemoved
        );
        this.setSelectedTargets(nextChilds.targets());
    }
    onSelectEnd(e) {
        const { isDragStartEnd, isClick, added, removed, inputEvent } = e;
        const moveable = this.moveableRef.value!;
        if (isDragStartEnd) {
            inputEvent.preventDefault();
            moveable.waitToChangeTarget().then(() => {
                moveable.dragStart(inputEvent);
            });
        }
        let nextChilds: TargetList;
        if (isDragStartEnd || isClick) {
            nextChilds = this.groupManager.selectCompletedChilds(
                e.data.startTargets,
                added,
                removed
            );
        } else {
            nextChilds = this.groupManager.selectSameDepthChilds(
                e.data.startTargets,
                added,
                removed
            );
        }
        e.currentTarget.setSelectedTargets(nextChilds.flatten());
        this.setSelectedTargets(nextChilds.targets());
    }
}