import {
    _decorator, Component, Node, Label, EditBox, Button, UITransform, Color, Widget, Graphics, Layers,
} from 'cc';
import { EDITOR, PREVIEW } from 'cc/env';
import { GameManager } from '../manager/GameManager';

const { ccclass } = _decorator;

const HUD_LAYER = Layers.Enum.UI_3D;

/** 预览模式下调试条（对齐 Unity Editor/TestPlayer） */
@ccclass('GameplayDebugBar')
export class GameplayDebugBar extends Component {
    private stepBox: EditBox | null = null;

    static shouldShow(): boolean {
        return EDITOR && PREVIEW;
    }

    static ensure(parent: Node): GameplayDebugBar | null {
        if (!GameplayDebugBar.shouldShow()) return null;
        let bar = parent.getChildByName('GameplayDebugBar');
        if (!bar) {
            bar = new Node('GameplayDebugBar');
            bar.parent = parent;
            bar.layer = HUD_LAYER;
            bar.addComponent(GameplayDebugBar);
        }
        bar.setSiblingIndex(parent.children.length - 1);
        console.log('[GameplayDebugBar] 已显示（左下角）');
        return bar.getComponent(GameplayDebugBar)!;
    }

    onLoad() {
        this.node.layer = HUD_LAYER;
        this.buildUI();
    }

    private gm() {
        return GameManager.instance;
    }

    private buildUI() {
        const rootUi = this.node.getComponent(UITransform) || this.node.addComponent(UITransform);
        rootUi.setContentSize(680, 52);
        rootUi.setAnchorPoint(0, 0);

        const bg = this.node.getComponent(Graphics) || this.node.addComponent(Graphics);
        bg.fillColor = new Color(0, 0, 0, 160);
        bg.clear();
        bg.rect(0, 0, 680, 52);
        bg.fill();

        this.mkLabel('Title', '调试', 8, 26, 14, new Color(255, 220, 120));

        this.stepBox = this.mkEdit('StepInput', '1', 52, 8, 40);
        this.mkBtn('前', 100, 8, 44, () => this.act('debugMove', this.step()));
        this.mkBtn('后', 150, 8, 44, () => this.act('debugMove', -this.step()));
        this.mkBtn('跳', 200, 8, 40, () => this.act('debugJump'));
        this.mkBtn('←', 246, 8, 36, () => this.act('debugRotateLeft', 1));
        this.mkBtn('→', 288, 8, 36, () => this.act('debugRotateRight', 1));
        this.mkBtn('坐标', 330, 8, 52, () => this.act('debugPlayerInfo'));
        this.mkBtn('结束', 388, 8, 52, () => this.act('debugInputEnd'));
        this.mkBtn('载具', 446, 8, 52, () => this.act('debugVehicleMove', 1));

        const widget = this.node.getComponent(Widget) || this.node.addComponent(Widget);
        widget.isAlignBottom = true;
        widget.bottom = 12;
        widget.isAlignLeft = true;
        widget.left = 12;
        widget.alignMode = Widget.AlignMode.ON_WINDOW_RESIZE;
    }

    private step(): number {
        const n = parseInt(this.stepBox?.string ?? '1', 10);
        return Number.isNaN(n) || n === 0 ? 1 : n;
    }

    private act(method: string, arg?: number) {
        const gm = this.gm();
        if (!gm) {
            console.warn('[GameplayDebugBar] GameController 未就绪');
            return;
        }
        const fn = (gm as unknown as Record<string, unknown>)[method];
        if (typeof fn !== 'function') {
            console.warn(`[GameplayDebugBar] 无方法 ${method}`);
            return;
        }
        if (arg === undefined) (fn as () => void).call(gm);
        else (fn as (n: number) => void).call(gm, arg);
    }

    private mkLabel(name: string, text: string, x: number, y: number, size: number, color: Color): Label {
        const n = new Node(name);
        n.parent = this.node;
        n.layer = HUD_LAYER;
        n.setPosition(x, y, 0);
        n.addComponent(UITransform).setContentSize(80, 24);
        const lb = n.addComponent(Label);
        lb.string = text;
        lb.fontSize = size;
        lb.color = color;
        return lb;
    }

    private mkEdit(name: string, value: string, x: number, y: number, w: number): EditBox {
        const n = new Node(name);
        n.parent = this.node;
        n.layer = HUD_LAYER;
        n.setPosition(x, y, 0);
        n.addComponent(UITransform).setContentSize(w, 32);
        const box = n.addComponent(EditBox);
        box.string = value;
        box.fontSize = 16;
        const tl = new Node('TEXT_LABEL');
        tl.parent = n;
        tl.layer = HUD_LAYER;
        tl.addComponent(UITransform).setContentSize(w, 32);
        box.textLabel = tl.addComponent(Label);
        box.textLabel.fontSize = 16;
        box.textLabel.color = new Color(255, 255, 255);
        const pl = new Node('PLACEHOLDER_LABEL');
        pl.parent = n;
        pl.layer = HUD_LAYER;
        pl.addComponent(UITransform).setContentSize(w, 32);
        box.placeholderLabel = pl.addComponent(Label);
        box.placeholderLabel.fontSize = 16;
        box.placeholderLabel.color = new Color(140, 140, 140);
        return box;
    }

    private mkBtn(caption: string, x: number, y: number, w: number, handler: () => void) {
        const n = new Node(`Btn_${caption}`);
        n.parent = this.node;
        n.layer = HUD_LAYER;
        n.setPosition(x, y, 0);
        n.addComponent(UITransform).setContentSize(w, 32);
        const btn = n.addComponent(Button);
        btn.transition = Button.Transition.SCALE;
        const tl = new Node('Label');
        tl.parent = n;
        tl.layer = HUD_LAYER;
        tl.addComponent(UITransform).setContentSize(w, 32);
        const lb = tl.addComponent(Label);
        lb.string = caption;
        lb.fontSize = 15;
        lb.color = new Color(255, 255, 255);
        n.on(Button.EventType.CLICK, handler, this);
    }
}