import { Node, UITransform, view } from 'cc';
import { PopCenterPreset } from './PopAnimTypes';

/** 按 center 占屏比例自适应的入场参数 */
export interface AdaptivePopParams {
    peak: number;
    undershoot: number;
    lift: number;
    launchDur: number;
    recoilDur: number;
    lockDur: number;
    jellyDur: number;
    jellyAmp: number;
    opacityStart: number;
}

function clamp01(t: number): number {
    if (t <= 0) return 0;
    if (t >= 1) return 1;
    return t;
}

function lerp(a: number, b: number, t: number): number {
    return a + (b - a) * t;
}

/** 0=小面板有力，1=大面板克制 */
function measurePanelFill(center: Node): number {
    const ui = center.getComponent(UITransform);
    if (!ui) return 0.5;
    const { width, height } = ui.contentSize;
    if (width <= 0 || height <= 0) return 0.5;
    const panelMax = Math.max(width, height);
    const screenMin = Math.min(view.getVisibleSize().width, view.getVisibleSize().height);
    return clamp01((panelMax / screenMin - 0.2) / 0.72);
}

export function computeAdaptivePopParams(center: Node, preset: PopCenterPreset): AdaptivePopParams | null {
    if (preset !== 'scale' && preset !== 'bounce') return null;

    const fill = measurePanelFill(center);
    const punch = 1 - fill;
    const jelly = preset === 'bounce';

    if (preset === 'scale') {
        return {
            peak: lerp(1.05, 1.09, punch),
            undershoot: lerp(0.988, 0.978, punch),
            lift: lerp(6, 12, punch),
            launchDur: lerp(0.09, 0.11, punch),
            recoilDur: 0.04,
            lockDur: lerp(0.05, 0.065, fill),
            jellyDur: 0,
            jellyAmp: 0,
            opacityStart: 200,
        };
    }

    return {
        peak: lerp(1.06, 1.12, punch),
        undershoot: lerp(0.985, 0.968, punch),
        lift: lerp(8, 18, punch),
        launchDur: lerp(0.10, 0.13, punch),
        recoilDur: 0.045,
        lockDur: lerp(0.055, 0.075, fill),
        jellyDur: lerp(0.12, 0.15, punch),
        jellyAmp: lerp(0.85, 1.15, punch),
        opacityStart: 160,
    };
}

export function adaptivePopDuration(p: AdaptivePopParams): number {
    return p.launchDur + p.recoilDur + p.lockDur + p.jellyDur;
}