// Side-by-side review of the reference-based templates: the reference original (left) against our render (right), plus
// the multi-page, Letter, long-text and logo-variant samples. Run: npm run templates:compare [-- monolith cobalt-stripe]
// Output: /tmp/invoice-c6a/ (override with --out=DIR). With --numbers it also prints text baselines (reference vs ours) for tuning.
import { readFileSync, writeFileSync, mkdirSync } from "node:fs";
import path from "node:path";
import { CANVA_DIR, loadCanvas, loadRenderer, rasterize, textItems } from "./lib.mjs";

const argv = process.argv.slice(2);
const OUT = argv.find((a) => a.startsWith("--out="))?.slice(6) ?? "/tmp/invoice-c6a";
const SCALE = 1.6;
const PDF_NO = { marble: 1, highlighter: 2, monolith: 3, linea: 4, monogram: 5, serenity: 6, "crimson-grid": 7, "cobalt-stripe": 8, "slate-band": 9, "teal-swoosh": 10, "tangerine-ledger": 11, "purple-pop": 12, "citrus-split": 13 };
const ROWS = { linea: 7, "crimson-grid": 3, "tangerine-ledger": 3, "slate-band": 5, "teal-swoosh": 5, "purple-pop": 3, "citrus-split": 3, monolith: 3, "cobalt-stripe": 8 };
const DARK = ["slate-band"];
const args = process.argv.slice(2);
const numbers = args.includes("--numbers");
const ids = args.filter((a) => !a.startsWith("--"));
const targets = ids.length ? ids : ["monolith", "cobalt-stripe"];

const LONG = "Unit 4, Third Floor, The Grand Heritage Business Centre, Plot 1187-B, Old Airport Road Extension, Opposite the Municipal Corporation Ward Office, Domlur Second Stage, Bengaluru Urban District, Karnataka State, India - 560071; Registered office: Level 12, Tower C, Global Technology Park, Outer Ring Road, Marathahalli, Bengaluru - 560103";
const TOKEN = "Supercalifragilisticexpialidocious-Pneumonoultramicroscopic-1234567890";

async function main() {
  mkdirSync(OUT, { recursive: true });
  const { createCanvas } = await loadCanvas();
  const r = await loadRenderer();
  r.ensureSetup();
  const side = async (left, right, file) => {
    const gap = 12;
    const c = createCanvas(left.width + right.width + gap, Math.max(left.height, right.height));
    const ctx = c.getContext("2d");
    ctx.fillStyle = "#888888";
    ctx.fillRect(0, 0, c.width, c.height);
    ctx.drawImage(left, 0, 0);
    ctx.drawImage(right, left.width + gap, 0);
    writeFileSync(path.join(OUT, file), c.toBuffer("image/png"));
  };

  for (const id of targets) {
    const no = PDF_NO[id];
    const canvaBytes = readFileSync(path.join(CANVA_DIR, `${no}.pdf`));
    const reference = await rasterize(canvaBytes, 1, SCALE);
    const rows = ROWS[id] ?? 5;
    const NAMES = ["Brand consultation", "Logo design", "Website design", "Social media templates", "Brand photography", "Brand guide", "Social media templates", "Name card"];
    // Short one-line descriptions like the reference sample, so positions can be compared row by row.
    const items = (hsn) => NAMES.slice(0, rows).map((description, i) => ({ id: i + 1, description, mode: "rate", rate: 100, unit: "hour", quantity: 1, amount: 0, sortOrder: i, ...(hsn ? { hsnSac: "998397" } : {}) }));
    const sample = (over = {}) => ({ name: `s-${id}`, items: items(over.registered !== false), signature: true, invoice: { poNumber: "", notes: "Payment due within 30 days.\nLate payments attract 2% monthly interest." }, ...over });
    const render = async (spec, size = "A4") => {
      // Purple Pop has no placeholder, so its logo samples turn the opt-in on (Linea's compare stays logo-free, like format.pdf).
      const prefs = r.prefsFor(size, { templateId: id, ...(id === "purple-pop" && spec.logo && spec.logo !== "none" ? { logo: { show: true } } : {}) });
      return r.renderFixture(spec, prefs);
    };

    // Templates with no reference placeholder show a logo only when the user turns it on.
    const OPT_IN = ["linea", "purple-pop"];
    const withLogo = await render(sample({ logo: "real" }));
    await side(reference, await rasterize(withLogo.result.bytes, 1, SCALE), `compare-${id}.png`);
    const noLogo = await render(sample({ registered: false, logo: "none" }));
    await side(reference, await rasterize(noLogo.result.bytes, 1, SCALE), `compare-${id}-nologo.png`);
    if (numbers) {
      const a = await textItems(canvaBytes);
      const b = await textItems(withLogo.result.bytes);
      console.log(`--- ${id}: reference (${a.length}) vs ours (${b.length}); baseline y, x`);
      for (const it of a) console.log(`  reference ${String(it.baseline).padStart(6)} ${String(it.x).padStart(6)} w${String(it.w).padStart(6)} s${it.size}  ${it.str.slice(0, 40)}`);
      for (const it of b) console.log(`  ours  ${String(it.baseline).padStart(6)} ${String(it.x).padStart(6)} w${String(it.w).padStart(6)} s${it.size}  ${it.str.slice(0, 40)}`);
    }

    if (OPT_IN.includes(id)) {
      // The opt-in logo (off by default: Linea keeps matching format.pdf, Purple Pop has no placeholder).
      const shown = await r.renderFixture(sample({ logo: "real" }), r.prefsFor("A4", { templateId: id, logo: { show: true } }));
      writeFileSync(path.join(OUT, `${id}-A4-logo-optin.png`), (await rasterize(shown.result.bytes, 1, SCALE)).toBuffer("image/png"));
    }
    // Dark-surface templates: the white knockout variant (a logo with alpha) next to the chip fallback (no alpha) above.
    const logoKinds = DARK.includes(id) ? ["square", "wide", "knockout"] : ["square", "wide"];
    for (const logo of logoKinds) {
      const x = await render(sample({ logo }));
      writeFileSync(path.join(OUT, `${id}-A4-logo-${logo}.png`), (await rasterize(x.result.bytes, 1, SCALE)).toBuffer("image/png"));
    }
    const sixty = await render({ name: "s60", items: 60, signature: true });
    for (let p = 1; p <= Math.min(2, sixty.result.pages); p++) writeFileSync(path.join(OUT, `${id}-A4-60rows-p${p}.png`), (await rasterize(sixty.result.bytes, p, SCALE)).toBuffer("image/png"));
    const letter = await render(sample({ logo: "real" }), "LETTER");
    writeFileSync(path.join(OUT, `${id}-Letter-tax.png`), (await rasterize(letter.result.bytes, 1, SCALE)).toBuffer("image/png"));
    const long = await render({
      name: "long",
      items: 4,
      signature: true,
      logo: "real",
      vendor: { vendorAddress: LONG, vendorEmail: `${TOKEN}@example-studios-india.co.in`, vendorName: TOKEN },
      invoice: { clientName: TOKEN, clientAddress: LONG, notes: `Note: ${TOKEN} ${LONG}` },
    });
    writeFileSync(path.join(OUT, `${id}-A4-longtext.png`), (await rasterize(long.result.bytes, 1, SCALE)).toBuffer("image/png"));
    console.log(`${id}: pages ${withLogo.result.pages}/${sixty.result.pages}/${letter.result.pages}/${long.result.pages}; audit issues`, [withLogo, noLogo, sixty, letter, long].map((x) => x.result.issues.length).join("/"));
    for (const x of [withLogo, noLogo, sixty, letter, long]) for (const i of x.result.issues) console.log("   ", i.severity, i.code, `p${i.page}`, i.message.slice(0, 160));
  }
}

await main();