buzz-sheet/components/public/material-poster.tsx

"use client";

import Image from "next/image";
import { useRef, type PointerEvent } from "react";

import type {
  CatalogAscensionGroup,
  CatalogBaseStat,
} from "@/lib/catalog/lunaris";
import { cn } from "@/lib/utils";

type PosterMaterial = {
  key: string;
  amount: number;
  name: string;
  imageUrl: string | null;
};

export type PosterBlendMode = "normal" | "multiply" | "screen" | "overlay" | "darken" | "lighten" | "color-dodge" | "color-burn" | "hard-light" | "soft-light" | "difference" | "exclusion" | "hue" | "saturation" | "color" | "luminosity";

type PosterCharacter = {
  name: string;
  nameCardImageUrl: string | null;
  baseStats: CatalogBaseStat[];
  ascension: Array<Omit<CatalogAscensionGroup, "items"> & { items: PosterMaterial[] }>;
};

const statLabels: Record<string, string> = {
  hp: "HP",
  atk: "ATK",
  def: "DEF",
  em: "EM",
};

function statLabel(key: string): string {
  return statLabels[key.toLowerCase()] ?? key;
}

function statValue(key: string, value: number | string): string {
  const formatted = typeof value === "number"
    ? value.toLocaleString("en-US", { maximumFractionDigits: 2 })
    : value;
  return key.includes("%") ? `${formatted}%` : formatted;
}

function clampOffset(value: number): number {
  return Math.max(-50, Math.min(50, value));
}

export function MaterialPoster({
  character,
  characterArtUrl,
  artworkOffsetX,
  artworkOffsetY,
  artworkScale,
  topColors,
  bottomColors,
  interactive = false,
  onArtworkMove,
  className,
  bleeding = [],
}: {
  character: PosterCharacter;
  characterArtUrl: string | null;
  artworkOffsetX: number;
  artworkOffsetY: number;
  topColors: [string, string];
  bottomColors: [string, string];
  interactive?: boolean;
  onArtworkMove?: (offset: { x: number; y: number }) => void;
  className?: string;
  artworkScale: number;
  bleeding?: Array<{ id: string; imageUrl: string | null; amount: number; scale: number; blendMode: PosterBlendMode }>;
}) {
  const dragStart = useRef<{ pointerId: number; x: number; y: number; offsetX: number; offsetY: number } | null>(null);
  const stats = character.baseStats.slice(0, 4);
  const materials = character.ascension.flatMap((group) => group.items);
  const background = `linear-gradient(180deg, ${topColors[0]} 0%, ${topColors[1]} 22%, rgba(0,0,0,0) 42%, rgba(0,0,0,0) 62%, ${bottomColors[0]} 88%, ${bottomColors[1]} 100%)`;

  function handlePointerDown(event: PointerEvent<HTMLDivElement>) {
    if (!interactive || !characterArtUrl || !onArtworkMove) return;
    event.currentTarget.setPointerCapture(event.pointerId);
    dragStart.current = {
      pointerId: event.pointerId,
      x: event.clientX,
      y: event.clientY,
      offsetX: artworkOffsetX,
      offsetY: artworkOffsetY,
    };
  }

  function handlePointerMove(event: PointerEvent<HTMLDivElement>) {
    if (!dragStart.current || dragStart.current.pointerId !== event.pointerId || !onArtworkMove) return;
    const rect = event.currentTarget.getBoundingClientRect();
    onArtworkMove({
      x: clampOffset(dragStart.current.offsetX + ((event.clientX - dragStart.current.x) / rect.width) * 100),
      y: clampOffset(dragStart.current.offsetY + ((event.clientY - dragStart.current.y) / rect.height) * 100),
    });
  }

  function handlePointerUp(event: PointerEvent<HTMLDivElement>) {
    if (dragStart.current?.pointerId === event.pointerId) dragStart.current = null;
  }

  return (
    <div
      className={cn("@container relative aspect-[4/5] w-full select-none overflow-hidden bg-black text-white", interactive && characterArtUrl && "cursor-move", className)}
      style={{ backgroundImage: background }}
      onPointerDown={handlePointerDown}
      onPointerMove={handlePointerMove}
      onPointerUp={handlePointerUp}
      onPointerCancel={handlePointerUp}
      role={interactive && characterArtUrl ? "application" : undefined}
      aria-label={interactive && characterArtUrl ? "ลากเพื่อเลื่อนภาพตัวละคร" : undefined}
    >
      {character.nameCardImageUrl ? (
        <Image
          src={character.nameCardImageUrl}
          alt=""
          fill
          sizes="(min-width: 1024px) 800px, 100vw"
          className="object-cover opacity-75"
          priority={!interactive}
        />
      ) : null}
      <div className="absolute inset-0 bg-black/55" />
      <Image
        src="/img/mat/fade.png"
        alt=""
        fill
        sizes="(min-width: 1024px) 800px, 100vw"
        className="pointer-events-none object-cover opacity-75"
        priority={!interactive}
      />
      {characterArtUrl ? (
        <div
          className="pointer-events-none absolute inset-0"
          style={{ transform: `translate(${artworkOffsetX}%, ${artworkOffsetY}%) scale(${artworkScale / 100})` }}
        >
          <Image
            src={characterArtUrl}
            alt={character.name}
            fill
            sizes="(min-width: 1024px) 800px, 100vw"
            className="object-contain object-center"
            priority={!interactive}
          />
        </div>
      ) : null}
      <div className="pointer-events-none absolute inset-0 overflow-hidden">
        {bleeding.map((layer) => layer.imageUrl ? (
          <Image
            key={layer.id}
            src={layer.imageUrl}
            alt=""
            fill
            sizes="(min-width: 1024px) 800px, 100vw"
            className="object-contain object-center"
            style={{ opacity: Math.max(0, Math.min(100, layer.amount)) / 100, mixBlendMode: layer.blendMode, transform: `scale(${Math.max(25, Math.min(300, layer.scale)) / 100})` }}
          />
        ) : null)}
      </div>
      <div className="pointer-events-none absolute inset-0 bg-gradient-to-b from-black/10 via-transparent to-black/80" />

      <div className="absolute inset-x-[4%] top-[5%]" style={{ fontFamily: "Kanit Poster", fontWeight: 800, fontStyle: "italic", textShadow: "-6px 14px 0 rgba(0,0,0,0.59)" }}>
        <h2 className="text-[7cqw] leading-none">BASE STATS</h2>
        <div className="mt-[4%] flex w-[53%] flex-col gap-[1.5%]">
          {Array.from({ length: 4 }, (_, index) => {
            const stat = stats[index];
            return (
              <div key={stat?.key ?? index} className="flex h-[7cqw] items-center justify-between rounded-[1.5cqw] bg-black/95 px-[4%] text-[3.2cqw] leading-none">
                <span>{stat ? statLabel(stat.key) : "—"}</span>
                <span>{stat ? statValue(stat.key, stat.value) : "—"}</span>
              </div>
            );
          })}
        </div>
      </div>

      <div className="absolute inset-x-[4%] top-[51%]" style={{ fontFamily: "Kanit Poster", fontWeight: 800, fontStyle: "italic", textShadow: "-6px 14px 0 rgba(0,0,0,0.59)" }}>
        <h2 className="text-[7cqw] leading-none">MATERIALS</h2>
        <p className="mt-[1%] text-[4.5cqw] leading-none">LV.90</p>
        <div className="mt-[5%] grid grid-cols-8 gap-[1.2%]">
          {materials.map((material, index) => (
            <div key={`${material.key}-${index}`} className="aspect-[0.65] overflow-hidden rounded-[1.3cqw] bg-black/95 ring-1 ring-white/10">
              <div className="flex h-[68%] items-center justify-center rounded-br-[1.3cqw] bg-[#c1c1c1] p-[8%]">
                {material.imageUrl ? <Image src={material.imageUrl} alt="" width={96} height={96} className="size-full object-contain" /> : null}
              </div>
              <div className="flex h-[32%] items-center justify-center px-[4%] text-center text-[2.2cqw] leading-none">
                <span>×{material.amount.toLocaleString("en-US")}</span>
              </div>
            </div>
          ))}
        </div>
      </div>
    </div>
  );
}