import { walk } from "jsr:@std/fs";

const TARGET_DIR = "./src";
const MAX_FILE_LINES = 400;

// Auditable allowlist for exceptional files that legitimately exceed MAX_FILE_LINES.
// Every entry must be explicitly documented and approved.
const ALLOWLISTED_LARGE_FILES = new Set<string>([
  // Currently empty: all modules in src/ must strictly conform to <= 400 lines.
]);

let hasErrors = false;

async function checkFile(path: string) {
  const content = await Deno.readTextFile(path);
  const lines = content.split("\n");

  // 1. Enforce strict 400-line ceiling
  if (lines.length > MAX_FILE_LINES && !ALLOWLISTED_LARGE_FILES.has(path)) {
    console.error(
      `[Arch Lint] ❌ File size ceiling exceeded in ${path}: ${lines.length} lines (Hard Ceiling: ${MAX_FILE_LINES} lines).`,
    );
    console.error(
      `    -> Subdivide this module into focused, SRP-aligned component files within the feature directory (e.g. login_fragments.tsx, register_fragments.tsx).`,
    );
    hasErrors = true;
  }

  lines.forEach((line, index) => {
    // 2. Block anti-formatting minification hacks (lines over 300 chars without SVG/CSS/raw string reasons)
    if (
      line.length > 300 &&
      !line.includes("<svg") &&
      !line.includes("data:image") &&
      !line.includes("style=") &&
      !line.includes("`") &&
      !line.includes("/*")
    ) {
      console.error(
        `[Arch Lint] ❌ Anti-formatting detected (abnormally long line: ${line.length} chars) in ${path}:${
          index + 1
        }`,
      );
      console.error(
        `    -> Format code with standard 'deno fmt'. Do not minify to bypass line limits.`,
      );
      hasErrors = true;
    }

    // 3. Block banned DOM APIs in src/
    if (
      line.includes("document.getElementById") ||
      line.includes("document.querySelector") ||
      line.includes("document.createElement")
    ) {
      console.error(
        `[Arch Lint] ❌ Banned DOM API used in ${path}:${index + 1}`,
      );
      console.error(`    ${line.trim()}`);
      console.error(
        `    -> Use Datastar reactive attributes or SSE morphs instead.`,
      );
      hasErrors = true;
    }

    // 4. Block unescaped HTML in raw strings (basic heuristic for dangerouslySetInnerHTML)
    if (
      line.includes("dangerouslySetInnerHTML") &&
      !path.includes("error_fragments.tsx")
    ) {
      console.error(
        `[Arch Lint] ❌ dangerouslySetInnerHTML used in ${path}:${index + 1}`,
      );
      console.error(`    ${line.trim()}`);
      console.error(
        `    -> Native JSX HTML escaping should be used unless in explicit core fragments.`,
      );
      hasErrors = true;
    }
  });
}

for await (const entry of walk(TARGET_DIR, { exts: [".ts", ".tsx"] })) {
  if (entry.isFile) {
    await checkFile(entry.path);
  }
}

if (hasErrors) {
  Deno.exit(1);
} else {
  console.log("✅ Architecture lint passed (All files <= 400 lines & clean).");
}