// Sanity checks for the VS Code extension assets. Run with `node test/validate.mjs`.
// Verifies the JSON contribution files parse and that the bundled compiler both
// accepts valid .wrn and reports an offset for invalid .wrn (what diagnostics need).
import { readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";
import { createRequire } from "node:module";

const here = dirname(fileURLToPath(import.meta.url));
const root = join(here, "..");
const require = createRequire(import.meta.url);

let failures = 0;
const ok = (name) => console.log(`  ok   ${name}`);
const bad = (name, detail) => {
  failures++;
  console.error(`  FAIL ${name}${detail ? " — " + detail : ""}`);
};

// 1. All JSON contribution files parse.
for (const rel of [
  "package.json",
  "language-configuration.json",
  "syntaxes/wrn.tmLanguage.json",
  "syntaxes/wrn.injection.tmLanguage.json",
  "snippets/wrn.json",
]) {
  try {
    JSON.parse(readFileSync(join(root, rel), "utf8"));
    ok(`json parses: ${rel}`);
  } catch (e) {
    bad(`json parses: ${rel}`, e.message);
  }
}

// 2. Grammar wires up the right scope + embedded languages.
const grammar = JSON.parse(readFileSync(join(root, "syntaxes/wrn.tmLanguage.json"), "utf8"));
grammar.scopeName === "source.wrn" ? ok("grammar scopeName") : bad("grammar scopeName");

const localIncludes = [];
const visitGrammarNode = (value) => {
  if (Array.isArray(value)) {
    value.forEach(visitGrammarNode);
    return;
  }
  if (!value || typeof value !== "object") return;
  if (typeof value.include === "string" && value.include.startsWith("#")) {
    localIncludes.push(value.include.slice(1));
  }
  Object.values(value).forEach(visitGrammarNode);
};
visitGrammarNode(grammar.patterns);
visitGrammarNode(grammar.repository);
const missingIncludes = [...new Set(localIncludes)].filter((name) => !grammar.repository?.[name]);
missingIncludes.length === 0
  ? ok("all local grammar includes resolve")
  : bad("all local grammar includes resolve", missingIncludes.join(", "));
grammar.repository?.["conditional-class-single"]
  ? ok("single-quoted class directives are registered")
  : bad("single-quoted class directives are registered");
grammar.repository?.["style-block"]?.applyEndPatternLast === true
  ? ok("style blocks keep nested CSS braces embedded")
  : bad("style blocks keep nested CSS braces embedded");
grammar.repository?.["view-block"]?.applyEndPatternLast === true
  ? ok("view blocks keep template directive braces embedded")
  : bad("view blocks keep template directive braces embedded");
grammar.repository?.interpolation?.patterns?.some(
  (pattern) => pattern.name === "meta.block.directive.wrn",
)
  ? ok("template block directives have dedicated grammar scopes")
  : bad("template block directives have dedicated grammar scopes");

// 3. Marketplace metadata and the gallery icon meet vsce requirements.
try {
  const manifest = JSON.parse(readFileSync(join(root, "package.json"), "utf8"));
  manifest.publisher === "wrnexus" ? ok("publisher id") : bad("publisher id");
  const language = manifest.contributes?.languages?.find((entry) => entry.id === "wrn");
  language?.extensions?.includes(".wrn")
    ? ok(".wrn extension maps to the wrn language")
    : bad(".wrn extension maps to the wrn language");
  manifest.contributes?.configurationDefaults?.["files.associations"]?.["*.wrn"] === "wrn"
    ? ok("default file association uses the wrn language id")
    : bad("default file association uses the wrn language id");
  manifest.activationEvents?.includes("onLanguage:wrn")
    ? ok("extension activates for the wrn language")
    : bad("extension activates for the wrn language");
  manifest.activationEvents?.length === 1 && manifest.activationEvents[0] === "onLanguage:wrn"
    ? ok("extension activates only when a WRN document is used")
    : bad("extension avoids workspace-wide startup activation");
  const extensionSource = readFileSync(join(root, "src/extension.js"), "utf8");
  !extensionSource.includes('createFileSystemWatcher("**/*.wrn")')
    ? ok("language client avoids an unrestricted workspace watcher")
    : bad("language client avoids an unrestricted workspace watcher");
  manifest.contributes?.configuration?.properties?.["wrnexus.languageServer.enable"]?.default ===
  true
    ? ok("shared language server is enabled by default")
    : bad("shared language server is enabled by default");
  readFileSync(join(root, "src/language-server.cjs"), "utf8").includes("WRNexus Language Server")
    ? ok("bundled language server exists")
    : bad("bundled language server exists");
  language?.firstLine
    ? ok("first-line language detection is configured")
    : bad("first-line language detection is configured");
  manifest.icon?.endsWith(".png") ? ok("Marketplace icon is PNG") : bad("Marketplace icon is PNG");
  const icon = readFileSync(join(root, manifest.icon));
  const isPng = icon.subarray(1, 4).toString("ascii") === "PNG";
  const width = isPng ? icon.readUInt32BE(16) : 0;
  const height = isPng ? icon.readUInt32BE(20) : 0;
  isPng && width >= 128 && height >= 128
    ? ok(`Marketplace icon dimensions (${width}x${height})`)
    : bad("Marketplace icon is at least 128x128 PNG");
  for (const rel of ["README.md", "CHANGELOG.md", "SUPPORT.md", "LICENSE"]) {
    readFileSync(join(root, rel), "utf8");
    ok(`Marketplace document exists: ${rel}`);
  }
} catch (e) {
  bad("Marketplace metadata", e.message);
}

// 4. Bundled compiler: valid source compiles, invalid source throws with an offset.
try {
  const compiler = require(join(root, "src/compiler.cjs"));
  const good = `page Home {\n  view { <h1>Hi</h1> }\n}`;
  compiler.compileWireFile(good);
  ok("compiler accepts valid .wrn");

  const structuredProps = `page FooterExample {
  state footerItems = [
    {
      "label": "Accessibility",
      "href": "/accessibility",
      "value": "accessibility"
    }
  ]
  view {
    <Footer
      items={footerItems}
      options={{"dense":true}}
      links={[{"label":"Privacy","href":"/privacy"}]}
    />
  }
}`;
  compiler.compileWireFile(structuredProps);
  ok("compiler accepts native structured state and unquoted prop expressions");

  const badSrc = `page Home {\n  view { <h1>Hi</h2> }\n}`;
  let threw = false;
  try {
    compiler.compileWireFile(badSrc);
  } catch (e) {
    threw = true;
    /offset\s+\d+|end of input/.test(e.message)
      ? ok("compiler reports a locatable error")
      : bad("compiler reports a locatable error", e.message);
  }
  if (!threw) bad("compiler rejects invalid .wrn");
} catch (e) {
  bad("compiler bundle loads", e.message);
}

// 5. Formatter normalizes nested WRN blocks and is idempotent.
try {
  const { formatWrn } = require(join(root, "src/formatter.js"));
  const source = `page Home {\nview {\n<main>\n<h1>Hello</h1>\n</main>\n}\n}\n`;
  const expected = `page Home {\n  view {\n    <main>\n      <h1>Hello</h1>\n    </main>\n  }\n}\n`;
  const formatted = formatWrn(source, { insertSpaces: true, tabSize: 2 });
  formatted === expected ? ok("formatter indents WRN blocks") : bad("formatter indents WRN blocks");
  formatWrn(formatted, { insertSpaces: true, tabSize: 2 }) === formatted
    ? ok("formatter is idempotent")
    : bad("formatter is idempotent");
  const imported = formatWrn(
    `import {\nappUrl,\nother\n} from "@wrnexus/helpers";\n\nlayout Public {\nview { <p>Hi</p> }\n}\n`,
    { insertSpaces: true, tabSize: 2 },
  );
  imported.includes(`\nlayout Public {`) && formatWrn(imported, { tabSize: 2 }) === imported
    ? ok("formatter preserves top-level imports")
    : bad("formatter preserves top-level imports");
} catch (e) {
  bad("formatter loads", e.message);
}

console.log(failures === 0 ? "\nAll extension checks passed." : `\n${failures} check(s) failed.`);
process.exit(failures === 0 ? 0 : 1);