#!/usr/bin/env node
import console from "node:console";
import { existsSync, readFileSync, readdirSync, statSync } from "node:fs";
import { dirname, join, relative } from "node:path";
import process from "node:process";
import { spawnSync } from "node:child_process";
import { fileURLToPath } from "node:url";
import { createRequire } from "node:module";

const root = join(dirname(fileURLToPath(import.meta.url)), "..");
const require = createRequire(import.meta.url);
const failures = [];
const warnings = [];
const passes = [];
const fail = (message) => failures.push(message);
const pass = (message) => passes.push(message);
const readJson = (path) => JSON.parse(readFileSync(path, "utf8"));

function walk(dir, predicate = () => true) {
  if (!existsSync(dir)) return [];
  const out = [];
  for (const name of readdirSync(dir)) {
    if (["node_modules", ".git", "dist", ".wrnexus"].includes(name)) continue;
    const path = join(dir, name);
    const stat = statSync(path);
    if (stat.isDirectory()) out.push(...walk(path, predicate));
    else if (predicate(path)) out.push(path);
  }
  return out;
}

const packageDirs = readdirSync(join(root, "packages"))
  .filter((name) => existsSync(join(root, "packages", name, "package.json")))
  .sort();
if (packageDirs.length !== 33) fail(`Expected 33 framework packages, found ${packageDirs.length}`);
else pass("33 framework packages are present");

for (const name of packageDirs) {
  const manifest = readJson(join(root, "packages", name, "package.json"));
  if (manifest.version !== "0.6.0")
    fail(`packages/${name} is ${manifest.version ?? "unversioned"}`);
}
if (!failures.some((item) => item.startsWith("packages/")))
  pass("All framework packages are version 0.6.0");

for (const [label, path] of [
  ["root", "package.json"],
  ["VS Code extension", "editors/vscode/package.json"],
  ["managed CAPTCHA service", "services/managed-captcha/package.json"],
]) {
  const version = readJson(join(root, path)).version;
  if (version !== "0.6.0") fail(`${label} version is ${version}`);
  else pass(`${label} version is 0.6.0`);
}

for (const path of [
  "packages/store/src/index.ts",
  "packages/typecheck/src/index.ts",
  "packages/syntax/src/v060.ts",
  "packages/compiler/src/client-codegen.ts",
  "packages/compiler/src/server-codegen.ts",
  "packages/compiler/src/type-codegen.ts",
  "packages/compiler/src/store-codegen.ts",
  "packages/csr/src/outputs.ts",
  "packages/csr/src/server-client.ts",
  "packages/ssr/src/store-context.ts",
  "packages/ssr/src/rpc.ts",
  "UPGRADE-0.6.0.md",
  "ROLLBACK-0.6.0.md",
  "RELEASE_NOTES-0.6.0.md",
]) {
  if (!existsSync(join(root, path))) fail(`Missing required v0.6 file: ${path}`);
}

const syntaxManifest = readJson(join(root, "packages/syntax/package.json"));
const syntaxIndexSource = readFileSync(join(root, "packages/syntax/src/index.ts"), "utf8");
const compilerCodegenSource = readFileSync(join(root, "packages/compiler/src/codegen.ts"), "utf8");
const publicV060ImportPattern = /(?:\bfrom\s*|\brequire\s*\()\s*["']@wrnexus\/syntax\/v060["']/;
const publicV060Imports = walk(root, (path) => /\.(?:ts|tsx|js|mjs|cjs)$/.test(path)).filter(
  (path) => publicV060ImportPattern.test(readFileSync(path, "utf8")),
);
if (syntaxManifest.exports?.["./v060"])
  fail("@wrnexus/syntax still exposes the version-specific ./v060 subpath");
if (!syntaxIndexSource.includes("stripRuntimeFunctionModifiers"))
  fail("@wrnexus/syntax root does not re-export v0.6 helpers");
if (!compilerCodegenSource.includes('from "@wrnexus/syntax"'))
  fail("compiler does not import syntax helpers from @wrnexus/syntax");
for (const path of publicV060Imports)
  fail(`${relative(root, path)} imports the forbidden @wrnexus/syntax/v060 subpath`);
if (
  !failures.some(
    (item) =>
      item.includes("syntax/v060") ||
      item.includes("root does not re-export") ||
      item.includes("compiler does not import syntax helpers"),
  )
) {
  pass("v0.6 syntax helpers are exposed through @wrnexus/syntax only");
}

const parserSource = readFileSync(join(root, "packages/syntax/src/v060.ts"), "utf8");
for (const marker of [
  "parseOutputs",
  "parseStructuredImports",
  "parseStateDeclarations",
  "parseRuntimeFunctions",
  "parseStoreLifecycle",
]) {
  if (!parserSource.includes(marker)) fail(`v0.6 parser helper missing: ${marker}`);
}
if (
  ![
    "parseOutputs",
    "parseStructuredImports",
    "parseStateDeclarations",
    "parseRuntimeFunctions",
    "parseStoreLifecycle",
  ].some((marker) => !parserSource.includes(marker))
) {
  pass("v0.6 parser helpers are present");
}

const uiFiles = walk(join(root, "packages/ui/components"), (path) => path.endsWith(".wrn"));
const forbidden = [
  ["$emit", /\$emit\s*\(/],
  ["legacy @event", /^\s*@event\b/m],
  ["$event", /\$event\b/],
  ["event.detail", /\bevent\.detail\b/],
  ["unclassified function", /^\s*(?:async\s+)?function\s+[A-Za-z_$]/m],
];
for (const file of uiFiles) {
  const source = readFileSync(file, "utf8");
  for (const [label, pattern] of forbidden) {
    if (pattern.test(source)) fail(`${relative(root, file)} contains ${label}`);
  }
}
if (!failures.some((item) => item.startsWith("packages/ui/components/"))) {
  pass(`${uiFiles.length} UI components use classified functions and typed output declarations`);
}

function outputBlocks(source) {
  const blocks = [];
  for (const match of source.matchAll(/\boutputs\s*\{/g)) {
    const brace = source.indexOf("{", match.index);
    let depth = 0;
    let quote = "";
    for (let index = brace; index < source.length; index++) {
      const char = source[index];
      if (quote) {
        if (char === "\\") index++;
        else if (char === quote) quote = "";
        continue;
      }
      if (char === '"' || char === "'" || char === "`") quote = char;
      else if (char === "{") depth++;
      else if (char === "}" && --depth === 0) {
        blocks.push(source.slice(brace + 1, index));
        break;
      }
    }
  }
  return blocks;
}
for (const file of uiFiles) {
  const source = readFileSync(file, "utf8");
  if (outputBlocks(source).some((block) => /\bunknown\b/.test(block))) {
    fail(`${relative(root, file)} contains an untyped output payload contract`);
  }
}
if (!failures.some((item) => item.includes("untyped output payload contract"))) {
  pass("All UI output payload contracts are concrete and contain no unknown types");
}

for (const [path, markers] of [
  ["packages/compiler/src/client-codegen.ts", ["RESERVED_BINDINGS", "!parameterNames.has"]],
  [
    "packages/compiler/src/store-codegen.ts",
    [
      "const server = context.server",
      "persist.migrate",
      "persist.validate",
      "__wrnexusApplyStoreHotUpdate",
    ],
  ],
  ["packages/compiler/src/server-codegen.ts", ["remotelyReferencedServerFunctions"]],
  [
    "packages/dev-server/src/pipeline.ts",
    ["setCompileImportOptions", 'mode: "compatible"', "WRN-IMPORT-IMPLICIT"],
  ],
  ["packages/dev-server/src/runtime.ts", ["store-update", "__wrnexusApplyStoreHotUpdate"]],
]) {
  const source = readFileSync(join(root, path), "utf8");
  for (const marker of markers)
    if (!source.includes(marker)) fail(`${path} is missing focused fix marker: ${marker}`);
}
if (!failures.some((item) => item.includes("focused fix marker"))) {
  pass("Focused fixes 1-7 are wired into compiler, store, import, RPC, and HMR sources");
}

const storeTypesSource = readFileSync(join(root, "packages/store/src/types.ts"), "utf8");
const storeRuntimeSource = readFileSync(join(root, "packages/store/src/index.ts"), "utf8");
const storeCodegenSource = readFileSync(
  join(root, "packages/compiler/src/store-codegen.ts"),
  "utf8",
);
for (const [label, condition] of [
  [
    "separate client/server state generics",
    /StoreCombinedState<[\s\S]*?CS extends object[\s\S]*?SS extends object/.test(
      storeTypesSource,
    ) &&
      /createClientState\?: \(\) => CS/.test(storeTypesSource) &&
      /createServerState\?: \(\) => SS/.test(storeTypesSource),
  ],
  [
    "callable action default",
    /StoreFunction = \(\.\.\.args: any\[\]\) => any/.test(storeTypesSource) &&
      /Record<string, StoreFunction>/.test(storeTypesSource),
  ],
  [
    "non-colliding initialization promise",
    /readonly whenReady: Promise<void>/.test(storeTypesSource) &&
      !/readonly ready: Promise<void>/.test(storeTypesSource) &&
      /await instance\.whenReady/.test(storeRuntimeSource),
  ],
  [
    "browser store whenReady code generation",
    /whenReady: Promise\.resolve\(\)/.test(storeCodegenSource) &&
      /core\.whenReady = init\(\)/.test(storeCodegenSource),
  ],
]) {
  if (!condition) fail(`Store type regression: missing ${label}`);
}
if (!failures.some((item) => item.startsWith("Store type regression:"))) {
  pass(
    "Store client/server state, callable actions, and ready-state collision regressions are guarded",
  );
}

const reactiveRuntimeSource = readFileSync(
  join(root, "packages/csr/src/reactive-runtime.ts"),
  "utf8",
);
const clientCodegenSource = readFileSync(
  join(root, "packages/compiler/src/client-codegen.ts"),
  "utf8",
);
const syntaxParserSource = readFileSync(join(root, "packages/syntax/src/parser.ts"), "utf8");
const compilerMainSource = readFileSync(join(root, "packages/compiler/src/codegen.ts"), "utf8");
for (const [label, condition] of [
  [
    "synchronous hydration without a browser module",
    reactiveRuntimeSource.includes('if (!moduleUrl || moduleUrl === "__WRNEXUS_CLIENT_MODULE__")'),
  ],
  [
    "runtime binding collision guard",
    clientCodegenSource.includes("RUNTIME_BINDINGS") &&
      clientCodegenSource.includes("!RUNTIME_BINDINGS.has(prop.name)"),
  ],
  [
    "unknown lifecycle hook validation",
    syntaxParserSource.includes("Unknown lifecycle hook") &&
      syntaxParserSource.includes("Unknown store lifecycle hook"),
  ],
  [
    "synchronous pages without imported stores",
    compilerMainSource.includes('storeBindings.length > 0 ? "async " : ""'),
  ],
  [
    "mutable store dispose lifecycle",
    storeRuntimeSource.includes('runLifecycle("$dispose", definition.lifecycle?.dispose)'),
  ],
]) {
  if (!condition) fail(`R7 regression: missing ${label}`);
}
const rangeSliderReference = readJson(
  join(root, "packages/ui/component-reference.json"),
).components.find((component) => component.name === "RangeSlider");
if (
  !rangeSliderReference ||
  !["input", "change", "focus", "blur"].every((name) => rangeSliderReference.events.includes(name))
) {
  fail("R7 regression: RangeSlider output reference is incomplete");
}
if (!failures.some((item) => item.startsWith("R7 regression:"))) {
  pass(
    "R7 parser, hydration, codegen, store lifecycle, and component-reference regressions are guarded",
  );
}

const uiReference = readJson(join(root, "packages/ui/component-reference.json"));
const uiCatalog = readJson(join(root, "packages/ui/component-catalog.json"));
const declaredUiNames = uiFiles
  .map((file) => {
    const declaration = /^\s*component\s+([A-Za-z][A-Za-z0-9_]*)\b/m.exec(
      readFileSync(file, "utf8"),
    );
    return declaration?.[1] ?? null;
  })
  .filter(Boolean)
  .sort();
const referenceNames = uiReference.components.map((component) => component.name).sort();
const catalogNames = uiCatalog.components.map((component) => component.name).sort();
if (JSON.stringify(referenceNames) !== JSON.stringify(declaredUiNames)) {
  fail("R8 regression: component reference does not match bundled UI declarations");
}
if (JSON.stringify(catalogNames) !== JSON.stringify(declaredUiNames)) {
  fail("R8 regression: component catalog does not match bundled UI declarations");
}

try {
  const { compileWireFile } = require(join(root, "editors/vscode/src/compiler.cjs"));
  for (const file of uiFiles) {
    const output = compileWireFile(readFileSync(file, "utf8"), file);
    if (!output.includes("${__wireSpreadAttrs(__attrs)}")) {
      fail(`R8 regression: ${relative(root, file)} does not forward native attributes`);
    }
  }
} catch (error) {
  fail(`R8 regression: bundled UI compilation failed: ${error.message}`);
}
if (!failures.some((item) => item.startsWith("R8 regression:"))) {
  pass(
    "R8 UI compilation, readonly-prop diagnostics, native attributes, catalog, and reference are guarded",
  );
}

const toggleCountSource = readFileSync(
  join(root, "packages/ui/components/ToggleCount.wrn"),
  "utf8",
);
for (const [label, condition] of [
  [
    "peer client-function bindings",
    clientCodegenSource.includes("context.functions") &&
      clientCodegenSource.includes("const scopedContext = { ...context, functions }") &&
      clientCodegenSource.includes("handler(scopedContext, ...args)"),
  ],
  [
    "drift-free ToggleCount animation scheduling",
    toggleCountSource.includes("duration * frame / totalFrames") &&
      toggleCountSource.includes("scheduleValueFrame(") &&
      toggleCountSource.includes("data-animation-token") &&
      !toggleCountSource.includes("setTimeout(\n        animateValueFrame"),
  ],
]) {
  if (!condition) fail(`R9 regression: missing ${label}`);
}
if (!failures.some((item) => item.startsWith("R9 regression:"))) {
  pass("R9 peer-function binding and drift-free ToggleCount animation are guarded");
}

try {
  const { parse, generateTargets } = require(join(root, "editors/vscode/src/compiler.cjs"));
  const targets = generateTargets(
    parse(`component PeerCalls {
    state { value: number = 0 }
    functions {
      client function increment(): void { value += 1 }
      client function run(): void { increment() }
    }
    view { <button @click='run()'>{value}</button> }
  }`),
  );
  const executable = new Function(
    `${targets.browser.replace(/^export\s+/gm, "")}\nreturn { bindClientScope };`,
  )();
  const state = { value: 0 };
  const functions = executable.bindClientScope({
    state,
    props: {},
    output: {},
    server: {},
    refs: {},
  });
  functions.run();
  if (state.value !== 1) {
    fail(`R10 regression: peer client function state was overwritten (${state.value})`);
  } else {
    pass("R10 peer client functions preserve shared scoped state");
  }
} catch (error) {
  fail(`R10 regression: peer client function execution failed: ${error.message}`);
}

const compilerTargetTestSource = readFileSync(
  join(root, "packages/compiler/test/v060-targets.test.ts"),
  "utf8",
);
if (!compilerTargetTestSource.includes('targets.browser.replace(/^export\\s+/gm, "")')) {
  fail(
    "R11 regression: peer-function executable test does not strip export keywords with a whitespace regex",
  );
} else {
  pass("R11 peer-function executable regression test uses the correct export-stripping regex");
}

const releaseSource = readFileSync(join(root, "scripts/release.ts"), "utf8");
const referenceGeneratorSource = readFileSync(
  join(root, "scripts/generate-ui-component-reference.mjs"),
  "utf8",
);
for (const [label, condition] of [
  [
    "canonical generated-reference Git comparison",
    releaseSource.includes('["diff", "--quiet", "--", ...generatedFiles]') &&
      releaseSource.includes('["diff", "--name-status", "--", ...generatedFiles]'),
  ],
  [
    "component catalog included in the release reference gate",
    releaseSource.includes('"packages/ui/component-catalog.json"'),
  ],
  [
    "platform-independent component reference ordering",
    referenceGeneratorSource.includes("function compareText(left, right)") &&
      referenceGeneratorSource.includes("compareText(left.name, right.name)") &&
      !referenceGeneratorSource.includes("localeCompare"),
  ],
]) {
  if (!condition) fail(`R12 regression: missing ${label}`);
}
if (!failures.some((item) => item.startsWith("R12 regression:"))) {
  pass("R12 release reference gate is canonical, complete, and platform independent");
}

const showcaseFiles = walk(join(root, "examples/component-showcase/app"), (path) =>
  path.endsWith(".wrn"),
);
for (const file of showcaseFiles) {
  const source = readFileSync(file, "utf8");
  if (/\b(?:open|defaultOpen)\s*=\s*(?:"true"|'\{true\}'|"\{true\}")/.test(source)) {
    fail(`${relative(root, file)} forces an overlay open`);
  }
}
if (!failures.some((item) => item.includes("forces an overlay open"))) {
  pass(
    `${showcaseFiles.length} generated showcase pages contain no forced-open overlay regression`,
  );
}

for (const file of walk(root, (path) => path.endsWith(".json"))) {
  try {
    readJson(file);
  } catch (error) {
    fail(`Invalid JSON ${relative(root, file)}: ${error.message}`);
  }
}
if (!failures.some((item) => item.startsWith("Invalid JSON"))) pass("All JSON files parse");

for (const file of walk(root, (path) => /\.(?:mjs|cjs|js)$/.test(path))) {
  const check = spawnSync(process.execPath, ["--check", file], { encoding: "utf8" });
  if (check.status !== 0)
    fail(`JavaScript syntax failed: ${relative(root, file)}\n${check.stderr.trim()}`);
}
if (!failures.some((item) => item.startsWith("JavaScript syntax failed")))
  pass("JavaScript/MJS syntax checks pass");

const bun = spawnSync(process.platform === "win32" ? "bun.exe" : "bun", ["--version"], {
  encoding: "utf8",
});
if (bun.status !== 0)
  warnings.push("Bun is unavailable; run `bun install` and `bun run check` on the target machine.");
else pass(`Bun ${bun.stdout.trim()} is available`);

console.log("WRNexusJS v0.6 validation");
for (const message of passes) console.log(`PASS  ${message}`);
for (const message of warnings) console.warn(`WARN  ${message}`);
for (const message of failures) console.error(`FAIL  ${message}`);
console.log(`\n${passes.length} passed, ${warnings.length} warnings, ${failures.length} failed`);
process.exitCode = failures.length ? 1 : 0;