#!/usr/bin/env node

import { createHash } from "node:crypto";
import { spawnSync } from "node:child_process";
import {
  cp,
  lstat,
  mkdir,
  mkdtemp,
  readdir,
  readFile,
  rm,
  writeFile,
} from "node:fs/promises";
import { tmpdir } from "node:os";
import { dirname, join, relative, resolve } from "node:path";
import { fileURLToPath } from "node:url";

const scriptDir = dirname(fileURLToPath(import.meta.url));
const declaredFoundryRoot = process.env.NODEDC_FOUNDRY_SOURCE_ROOT;
if (!declaredFoundryRoot) {
  throw new Error("NODEDC_FOUNDRY_SOURCE_ROOT_is_required");
}
const foundryRoot = resolve(declaredFoundryRoot);
const expectedSourceCommit = "58800d957632320fa6717ec3fcff972023528759";
const artifactDir = resolve(
  process.env.NODEDC_DEPLOY_ARTIFACT_DIR
    || resolve(scriptDir, "../deploy-artifacts"),
);
const [
  patchId = "module-foundry-map-runtime-recovery-20260809-002",
  ...extra
] = process.argv.slice(2);

if (
  extra.length
  || !/^module-foundry-map-runtime-recovery-\d{8}-\d{3}$/.test(patchId)
) {
  throw new Error(
    "usage: build-module-foundry-map-runtime-recovery-artifact.mjs "
      + "[module-foundry-map-runtime-recovery-YYYYMMDD-NNN]",
  );
}

const files = Object.freeze([
  "package.json",
  "package-lock.json",
  "apps/catalog/src",
  "packages",
  "registry",
  "runtime-seed/page-layouts/map.json",
  "scripts",
  "server/catalog-server.mjs",
  "server/foundry-mcp.mjs",
  "server/map-grid-persistence.test.mjs",
]);
const ignoredBasenames = new Set([
  ".DS_Store",
  ".git",
  "node_modules",
  "runtime-data",
  "dist",
]);
const artifact = join(artifactDir, `nodedc-${patchId}.tgz`);
const checksum = `${artifact}.sha256`;
const stage = await mkdtemp(
  join(tmpdir(), "nodedc-foundry-map-runtime-recovery-"),
);

await assertFresh(artifact);
await assertExactSource();
await assertRecoveryBoundary();

try {
  for (const sourceRelative of files) {
    await copySafe(
      resolve(foundryRoot, sourceRelative),
      join(stage, "payload", sourceRelative),
    );
  }
  await writeFile(
    join(stage, "manifest.env"),
    `id=${patchId}\ncomponent=module-foundry\ntype=app-overlay\n`,
    "utf8",
  );
  await writeFile(join(stage, "files.txt"), `${files.join("\n")}\n`, "utf8");
  await mkdir(artifactDir, { recursive: true });
  run("python3", ["-c", canonicalTarScript(), artifact, stage]);
  const sha256 = digest(await readFile(artifact));
  await writeFile(
    checksum,
    `${sha256}  ${artifact.split("/").at(-1)}\n`,
    "utf8",
  );
  console.log(JSON.stringify({
    ok: true,
    patchId,
    artifact,
    checksum,
    sha256,
    sourceCommit: expectedSourceCommit,
    services: ["nodedc-module-foundry"],
    transition: "reconcile-partial-map-source-and-activate-runtime",
    files,
  }, null, 2));
} finally {
  await rm(stage, { recursive: true, force: true });
}

async function assertExactSource() {
  const declared = process.env.NODEDC_FOUNDRY_SOURCE_COMMIT;
  if (declared !== expectedSourceCommit) {
    throw new Error("foundry_source_commit_mismatch");
  }
  const dotGit = join(foundryRoot, ".git");
  try {
    await lstat(dotGit);
  } catch (error) {
    if (error?.code === "ENOENT") return;
    throw error;
  }
  const tracked = spawnSync(
    "git",
    ["-C", foundryRoot, "diff", "--quiet", "HEAD", "--", ...files],
    { encoding: "utf8" },
  );
  if (tracked.status !== 0) {
    throw new Error("foundry_selected_source_is_dirty");
  }
  const untracked = git(foundryRoot, [
    "ls-files",
    "--others",
    "--exclude-standard",
    "--",
    ...files,
  ]);
  if (untracked) {
    throw new Error("foundry_selected_source_has_untracked_files");
  }
}

async function assertRecoveryBoundary() {
  const packageJson = await readFile(join(foundryRoot, "package.json"), "utf8");
  const packageLock = await readFile(
    join(foundryRoot, "package-lock.json"),
    "utf8",
  );
  const preview = await readFile(
    join(foundryRoot, "apps/catalog/src/MapFixturePreview.tsx"),
    "utf8",
  );
  const renderer = await readFile(
    join(foundryRoot, "apps/catalog/src/CesiumMapRenderer.tsx"),
    "utf8",
  );
  const policy = await readFile(
    join(foundryRoot, "apps/catalog/src/mapGridPolicy.mjs"),
    "utf8",
  );
  const sector = await readFile(
    join(foundryRoot, "apps/catalog/src/mapSectorGrid.mjs"),
    "utf8",
  );
  const server = await readFile(
    join(foundryRoot, "server/catalog-server.mjs"),
    "utf8",
  );
  const registry = await readFile(
    join(foundryRoot, "registry/registry.json"),
    "utf8",
  );

  for (const marker of [
    "@nodedc/map-cesium-react",
    "npm run build --workspace @nodedc/map-cesium-react",
  ]) {
    if (!packageJson.includes(marker)) {
      throw new Error(`map_package_boundary_missing:${marker}`);
    }
  }
  if (!packageLock.includes('"packages/map-cesium-react"')) {
    throw new Error("map_package_lock_boundary_missing");
  }
  for (const marker of [
    "const sectorSpatialEntities = useMemo",
    "runtimeBindings={[...sectorScopedPrimaryRuntimeBindings, ...referenceRuntimeBindings]}",
    'label="Скрыть объекты за сектором"',
  ]) {
    if (!preview.includes(marker)) {
      throw new Error(`map_workspace_boundary_missing:${marker}`);
    }
  }
  for (const marker of [
    "class GridLayerController",
    "gridLegacyMode",
    "viewer.flyTo(entity",
  ]) {
    if (!renderer.includes(marker)) {
      throw new Error(`map_renderer_boundary_missing:${marker}`);
    }
  }
  for (const marker of [
    "gridLodProfiles",
    "GRID_LOD_HYSTERESIS_RATIO",
  ]) {
    if (!policy.includes(marker)) {
      throw new Error(`map_policy_boundary_missing:${marker}`);
    }
  }
  for (const marker of [
    "export function geodeticToLocalGridPlane",
    "export function localSectorAtGeodetic",
  ]) {
    if (!sector.includes(marker)) {
      throw new Error(`map_sector_boundary_missing:${marker}`);
    }
  }
  for (const marker of [
    "gridLodProfiles",
    "validateGridLodProfiles",
  ]) {
    if (!server.includes(marker)) {
      throw new Error(`map_server_boundary_missing:${marker}`);
    }
  }
  if (!registry.includes('"@nodedc/map-cesium-react"')) {
    throw new Error("map_registry_boundary_missing");
  }
}

async function copySafe(source, destination) {
  const sourceStat = await lstat(source);
  if (sourceStat.isSymbolicLink()) {
    throw new Error(
      `source_symlink_rejected:${relative(foundryRoot, source)}`,
    );
  }
  if (sourceStat.isFile()) {
    await mkdir(dirname(destination), { recursive: true });
    await cp(source, destination, { force: true, verbatimSymlinks: true });
    return;
  }
  if (!sourceStat.isDirectory()) {
    throw new Error(`source_type_rejected:${relative(foundryRoot, source)}`);
  }
  await mkdir(destination, { recursive: true });
  for (const entry of await readdir(source, { withFileTypes: true })) {
    if (
      ignoredBasenames.has(entry.name)
      || entry.name.startsWith(".env")
      || entry.name.endsWith(".tsbuildinfo")
    ) {
      continue;
    }
    const childSource = join(source, entry.name);
    const childDestination = join(destination, entry.name);
    if (entry.isSymbolicLink()) {
      throw new Error(
        `source_symlink_rejected:${relative(foundryRoot, childSource)}`,
      );
    }
    await copySafe(childSource, childDestination);
  }
}

async function assertFresh(path) {
  try {
    await lstat(path);
  } catch (error) {
    if (error?.code === "ENOENT") return;
    throw error;
  }
  throw new Error("artifact_already_exists");
}

function canonicalTarScript() {
  return [
    "import gzip,io,pathlib,sys,tarfile",
    "root=pathlib.Path(sys.argv[2])",
    "with open(sys.argv[1],'wb') as out:",
    " with gzip.GzipFile(filename='',mode='wb',fileobj=out,compresslevel=9,mtime=0) as gz:",
    "  with tarfile.open(fileobj=gz,mode='w',format=tarfile.PAX_FORMAT) as tar:",
    "   for top in ('manifest.env','files.txt','payload'):",
    "    p=root/top; paths=[p]+(sorted(p.rglob('*')) if p.is_dir() else [])",
    "    for x in paths:",
    "     info=tar.gettarinfo(str(x),arcname=x.relative_to(root).as_posix())",
    "     info.uid=info.gid=0; info.uname=info.gname='root'; info.mtime=0; info.mode=0o755 if info.isdir() else 0o644",
    "     with (open(x,'rb') if info.isfile() else io.BytesIO()) as src: tar.addfile(info,src if info.isfile() else None)",
  ].join("\n");
}

function digest(value) {
  return createHash("sha256").update(value).digest("hex");
}

function run(command, args) {
  const result = spawnSync(command, args, {
    encoding: "utf8",
    maxBuffer: 128 * 1024 * 1024,
  });
  if (result.status !== 0) {
    throw new Error(`${command}_failed:${result.stderr || result.stdout}`);
  }
}