// Name: Format HTML Diff from Clipboard JSON
// Description: Format before/after HTML from clipboard JSON into a Markdown doc and alert if they differ.
// Author: tayiorbeii
// GitHub: tayiorbeii

import "@johnlindquist/kit";

const raw = await clipboard.readText();
if (!raw?.trim()) {
  await notify({ title: "Clipboard Error", body: "Clipboard is empty or not text." });
  exit();
}

let data: any;
try {
  data = JSON.parse(raw);
} catch {
  await notify({ title: "Clipboard Error", body: "Clipboard does not contain valid JSON." });
  exit();
}

const keys = Object.keys(data || {});
if (!keys.length) {
  await notify({ title: "JSON Error", body: "Parsed JSON has no keys." });
  exit();
}

const norm = (s: string) => s.toLowerCase().replace(/[^a-z0-9]/g, "");
const findKey = (candidates: string[]) => {
  for (const k of keys) {
    const nk = norm(k);
    if (candidates.includes(nk)) return k;
  }
  return undefined;
};

const beforeCandidates = [
  "beforehtml",
  "before",
  "htmlbefore",
  "before_innerhtml",
  "beforeinnerhtml",
  "previoushtml",
  "oldhtml",
];
const afterCandidates = [
  "afterhtml",
  "after",
  "htmlafter",
  "after_innerhtml",
  "afterinnerhtml",
  "newhtml",
];

let beforeKey = findKey(beforeCandidates);
let afterKey = findKey(afterCandidates);

if (!beforeKey) {
  beforeKey = await arg("Select the Before HTML key", keys);
}
if (!afterKey) {
  afterKey = await arg("Select the After HTML key", keys.filter(k => k !== beforeKey));
}

const toStr = (v: any) => (typeof v === "string" ? v : v == null ? "" : String(v));
const normalizeEol = (s: string) => s.replace(/\r\n/g, "\n");

const beforeHtml = normalizeEol(toStr(data[beforeKey]));
const afterHtml = normalizeEol(toStr(data[afterKey]));

const formatted = [
  "## Before HTML",
  "",
  beforeHtml,
  "",
  "",
  "## After HTML",
  "",
  afterHtml,
  "",
].join("\n");

await clipboard.writeText(formatted);

const different = beforeHtml.trim() !== afterHtml.trim();
await notify({
  title: "HTML Comparison",
  body: different ? "Before and After HTML are different." : "Before and After HTML are identical.",
});

await toast("Formatted Markdown copied to clipboard.", { autoClose: 2500 });