/* eslint-disable @next/next/no-img-element */
import { ImageResponse } from "next/og";
import sharp from "sharp";

import { rarityGradient, rarityTextColor } from "@/lib/catalog/rarity";
import { getCachedPublicWeaponExport } from "@/lib/cache/public";
import { imageContentDisposition } from "@/lib/guides/export-image";

const anuphanFonts = Promise.all(
  [
    { subset: "latin", weight: 400 as const },
    { subset: "thai", weight: 400 as const },
    { subset: "latin", weight: 700 as const },
    { subset: "thai", weight: 700 as const },
  ].map(async ({ subset, weight }) => {
    const response = await fetch(
      `https://unpkg.com/@fontsource/anuphan@5.3.0/files/anuphan-${subset}-${weight}-normal.woff`,
    );
    if (!response.ok) throw new Error(`Unable to load Anuphan ${subset} ${weight}`);
    return {
      name: "Anuphan",
      data: await response.arrayBuffer(),
      weight,
      style: "normal" as const,
    };
  }),
).catch(() => []);

function metric(value: string): string {
  return `${Number(value).toLocaleString("en-US", { maximumFractionDigits: 2 })}%`;
}

async function pngDataUrl(url: string): Promise<string | null> {
  try {
    const response = await fetch(url);
    if (!response.ok) return null;
    const png = await sharp(Buffer.from(await response.arrayBuffer()))
      .resize(120, 120, { fit: "contain" })
      .png()
      .toBuffer();
    return `data:image/png;base64,${png.toString("base64")}`;
  } catch {
    return null;
  }
}

export async function GET(
  _request: Request,
  context: { params: Promise<{ guideId: string }> },
) {
  const { guideId } = await context.params;
  const guide = await getCachedPublicWeaponExport(guideId);
  if (!guide) return new Response("ไม่พบไกด์", { status: 404 });

  const [fonts, weaponImages] = await Promise.all([
    anuphanFonts,
    Promise.all(guide.weapons.map((row) => pngDataUrl(row.weapon.imageUrl))),
  ]);
  const weaponHeights = guide.weapons.map((row) => Math.max(126, 126 + (row.note ? Math.ceil(row.note.length / 52) * 22 : 0)));
  const height = Math.max(360, 190 + weaponHeights.reduce((sum, rowHeight) => sum + rowHeight, 0) + Math.max(0, guide.weapons.length - 1) * 14);

  return new ImageResponse(
    <div
      style={{
        width: "100%",
        height: "100%",
        display: "flex",
        flexDirection: "column",
        gap: 14,
        color: "#f7f7f7",
        background: "#05060a",
        padding: "32px 36px",
        fontFamily: "Anuphan",
        position: "relative",
      }}
    >
      <div style={{ position: "relative", zIndex: 1, display: "flex", flex: 1, flexDirection: "column", gap: 14 }}>
      <div style={{ display: "flex", flexDirection: "column", alignItems: "center", gap: 8, marginBottom: 6 }}>
        <div style={{ display: "flex", color: "#f0b72f", fontSize: 16, fontWeight: 700 }}>อาวุธที่แนะนำ</div>
        <div style={{ display: "flex", fontSize: 38, fontWeight: 700 }}>อาวุธ</div>
      </div>
      {guide.weapons.map((row, index) => (
        <div
          key={row.id}
          style={{
            display: "flex",
            minHeight: weaponHeights[index],
            overflow: "hidden",
            borderRadius: 14,
            background: "white",
          }}
        >
          <div
            style={{
              position: "relative",
              display: "flex",
              flex: 3,
              overflow: "hidden",
              borderBottomRightRadius: 80,
              background: rarityGradient(row.weapon.rarity),
              color: "white",
              padding: 0,
            }}
          >
            <div style={{ position: "relative", zIndex: 1, display: "flex", flex: 1, alignItems: "center", gap: 18, padding: "10px 40px 10px 24px" }}>
              {weaponImages[index] ? (
                <img src={weaponImages[index]!} alt="" width={92} height={92} style={{ objectFit: "contain" }} />
              ) : (
                <div style={{ display: "flex", width: 92, height: 92, alignItems: "center", justifyContent: "center", fontSize: 32 }}>{index + 1}</div>
              )}
              <div style={{ display: "flex", flexDirection: "column", gap: 5 }}>
                <div style={{ display: "flex", fontSize: 24, fontWeight: 700 }}>
                  {index + 1}. {row.weapon.name} R{row.refinement}
                </div>
                {row.note ? <div style={{ display: "flex", fontSize: 14, lineHeight: 1.55 }}>{row.note}</div> : null}
              </div>
            </div>
          </div>
          <div style={{ display: "flex", flex: 1, alignItems: "center", justifyContent: "space-around", gap: 12, color: "#17171c", padding: "12px 16px" }}>
            {row.overallPercent ? (
              <div style={{ display: "flex", flex: 1, flexDirection: "column", alignItems: "center" }}>
                <div style={{ display: "flex", color: rarityTextColor(row.weapon.rarity), fontSize: 36, fontWeight: 700 }}>{metric(row.overallPercent)}</div>
                <div style={{ display: "flex", fontSize: 14 }}>ดาเมททั้งทีม</div>
              </div>
            ) : null}
            {row.personalPercent ? (
              <div style={{ display: "flex", flex: 1, flexDirection: "column", alignItems: "center" }}>
                <div style={{ display: "flex", color: rarityTextColor(row.weapon.rarity), fontSize: 36, fontWeight: 700 }}>{metric(row.personalPercent)}</div>
                <div style={{ display: "flex", fontSize: 14 }}>ดาเมจส่วนตัว</div>
              </div>
            ) : null}
          </div>
        </div>
      ))}
      </div>
    </div>,
    {
      width: 1000,
      height,
      fonts: fonts.length ? fonts : undefined,
      headers: {
        "Cache-Control": "no-store",
        "Content-Disposition": imageContentDisposition(`${guide.guideName} อาวุธ`, "weapons"),
        "Content-Type": "image/png",
      },
    },
  );
}