#!/usr/bin/env node

const crypto = require("crypto");
const cp = require("child_process");
const fs = require("fs");
const os = require("os");
const path = require("path");

const repo = path.resolve(__dirname, "..");
const outputRoot = path.resolve(
  process.env.CLUSTERFLUX_PUBLIC_RELEASE_DIR ||
    path.join(repo, "target/public-release")
);
const publicTree = path.join(outputRoot, "public-tree");
const assetsDir = path.join(outputRoot, "assets");
const stagingDir = path.join(outputRoot, "staging");
const publicBuildTarget = path.resolve(
  process.env.CLUSTERFLUX_PUBLIC_BUILD_TARGET_DIR ||
    path.join(outputRoot, "cargo-target")
);
const hostedBuildTarget = path.resolve(
  process.env.CLUSTERFLUX_HOSTED_BUILD_TARGET_DIR ||
    path.join(outputRoot, "hosted-cargo-target")
);
const candidateManifestPath = process.env.CLUSTERFLUX_RELEASE_CANDIDATE_MANIFEST
  ? path.resolve(process.env.CLUSTERFLUX_RELEASE_CANDIDATE_MANIFEST)
  : null;
const defaultHostedCoordinatorEndpoint = "https://clusterflux.michelpaulissen.com";
const forgejoHost = "git.michelpaulissen.com";
const args = new Set(process.argv.slice(2));
const includeForgejoWorkflows =
  args.has("--include-forgejo-workflows") ||
  /^(1|true|yes)$/i.test(process.env.CLUSTERFLUX_INCLUDE_FORGEJO_WORKFLOWS || "");
const filteredTopLevel = ["private", "internal", "experiments", ".git", "target"];
const filteredDirectoryNames = [".clusterflux"];
const archiveIgnoredPathFallbacks = [
  "target",
  ".clusterflux",
  "vscode-extension/node_modules",
  "scripts/containers-home",
];
const publicRepoBranch = process.env.CLUSTERFLUX_PUBLIC_REPO_BRANCH || "main";
const publicBinaries = [
  "clusterflux",
  "clusterflux-coordinator",
  "clusterflux-node",
  "clusterflux-debug-dap",
];
const hostedBinary = "clusterflux-hosted-service";

function commandOutput(command, args, options = {}) {
  try {
    const execOptions = {
      cwd: repo,
      encoding: "utf8",
      stdio: ["ignore", "pipe", "ignore"],
      ...options,
    };
    execOptions.env = commandEnv(command, options.env);
    return cp
      .execFileSync(command, args, execOptions)
      .trim();
  } catch (_) {
    return null;
  }
}

function run(command, args, options = {}) {
  const execOptions = {
    cwd: repo,
    stdio: "inherit",
    ...options,
  };
  execOptions.env = commandEnv(command, options.env);
  cp.execFileSync(command, args, execOptions);
}

function nonInteractiveGitEnv(extra = {}) {
  return {
    ...process.env,
    GIT_TERMINAL_PROMPT: "0",
    GIT_ASKPASS: process.env.GIT_ASKPASS || "/bin/false",
    SSH_ASKPASS: process.env.SSH_ASKPASS || "/bin/false",
    GIT_SSH_COMMAND:
      process.env.GIT_SSH_COMMAND ||
      "ssh -o BatchMode=yes -o NumberOfPasswordPrompts=0",
    ...extra,
  };
}

function commandEnv(command, env) {
  if (command !== "git") {
    return env;
  }
  return nonInteractiveGitEnv(env);
}

function ensureDir(dir) {
  fs.mkdirSync(dir, { recursive: true });
}

function filteredOutPatterns() {
  return [
    "private/**",
    "internal/**",
    "experiments/**",
    ".git",
    "target",
    "git-ignored source paths",
    "root/*.md except README.md",
    "**/.clusterflux/**",
    ...(includeForgejoWorkflows ? [] : [".forgejo/**"]),
  ];
}

function gitIgnoredSourcePaths() {
  const output = commandOutput("git", [
    "ls-files",
    "--others",
    "--ignored",
    "--exclude-standard",
    "--directory",
    "-z",
  ]);
  if (output === null) {
    return archiveIgnoredPathFallbacks;
  }
  return [
    ...new Set([
      ...archiveIgnoredPathFallbacks,
      ...output
        .split("\0")
        .filter(Boolean)
        .map((relativePath) =>
          relativePath.replaceAll("\\", "/").replace(/\/$/, "")
        ),
    ]),
  ];
}

function isGitIgnored(relativePath, ignoredSourcePaths) {
  const normalized = relativePath.replaceAll(path.sep, "/");
  return ignoredSourcePaths.some(
    (ignored) => normalized === ignored || normalized.startsWith(`${ignored}/`)
  );
}

function isFilteredRootMarkdown(relativePath, entry) {
  return (
    !relativePath.includes(path.sep) &&
    (entry.isFile() || entry.isSymbolicLink()) &&
    path.extname(entry.name).toLowerCase() === ".md" &&
    !["README.md", "SECURITY.md"].includes(entry.name)
  );
}

function shouldFilter(entry, relativePath) {
  const parts = relativePath.split(path.sep).filter(Boolean);
  const topLevel = parts[0];
  if (filteredTopLevel.includes(topLevel)) return true;
  if (parts.some((part) => filteredDirectoryNames.includes(part))) return true;
  if (topLevel === ".forgejo" && !includeForgejoWorkflows) return true;
  if (isFilteredRootMarkdown(relativePath, entry)) return true;
  return false;
}

function copyFilteredTree(src, dest, ignoredSourcePaths, relative = "") {
  ensureDir(dest);
  const entries = fs
    .readdirSync(src, { withFileTypes: true })
    .sort((left, right) => left.name.localeCompare(right.name));

  for (const entry of entries) {
    const childRelative = relative ? path.join(relative, entry.name) : entry.name;
    if (
      shouldFilter(entry, childRelative) ||
      isGitIgnored(childRelative, ignoredSourcePaths)
    ) {
      continue;
    }

    const from = path.join(src, entry.name);
    const to = path.join(dest, entry.name);
    if (entry.isDirectory()) {
      copyFilteredTree(from, to, ignoredSourcePaths, childRelative);
    } else if (entry.isSymbolicLink()) {
      fs.symlinkSync(fs.readlinkSync(from), to);
    } else if (entry.isFile()) {
      fs.copyFileSync(from, to);
      fs.chmodSync(to, fs.statSync(from).mode & 0o777);
    }
  }
}

function assertFilteredTree(ignoredSourcePaths) {
  for (const excluded of ["private", "internal", "experiments"]) {
    if (fs.existsSync(path.join(publicTree, excluded))) {
      throw new Error(`${excluded}/ leaked into the public tree`);
    }
  }
  for (const file of walkFiles(publicTree)) {
    if (file.split(path.sep).includes(".clusterflux")) {
      throw new Error(`generated .clusterflux view state leaked into the public tree: ${file}`);
    }
  }
  if (!includeForgejoWorkflows && fs.existsSync(path.join(publicTree, ".forgejo"))) {
    throw new Error(".forgejo/ leaked into the host-neutral public tree");
  }
  if (!fs.existsSync(path.join(publicTree, "README.md"))) {
    throw new Error("product README.md is missing from the public tree");
  }
  for (const ignored of ignoredSourcePaths) {
    if (fs.existsSync(path.join(publicTree, ...ignored.split("/")))) {
      throw new Error(`Git-ignored source path leaked into the public tree: ${ignored}`);
    }
  }
  for (const entry of fs.readdirSync(publicTree, { withFileTypes: true })) {
    if (isFilteredRootMarkdown(entry.name, entry)) {
      throw new Error(`internal root Markdown file leaked into the public tree: ${entry.name}`);
    }
  }
}

function walkFiles(root, relative = "") {
  const dir = path.join(root, relative);
  const entries = fs
    .readdirSync(dir, { withFileTypes: true })
    .sort((left, right) => left.name.localeCompare(right.name));
  const files = [];
  for (const entry of entries) {
    const childRelative = relative ? path.join(relative, entry.name) : entry.name;
    if (entry.isDirectory()) {
      files.push(...walkFiles(root, childRelative));
    } else if (entry.isFile()) {
      files.push(childRelative);
    } else if (entry.isSymbolicLink()) {
      files.push(childRelative);
    }
  }
  return files;
}

function hashTree(root) {
  const hash = crypto.createHash("sha256");
  for (const file of walkFiles(root)) {
    const absolute = path.join(root, file);
    const stat = fs.lstatSync(absolute);
    hash.update(file.replaceAll(path.sep, "/"));
    hash.update("\0");
    hash.update(String(stat.mode & 0o777));
    hash.update("\0");
    if (stat.isSymbolicLink()) {
      hash.update("symlink");
      hash.update("\0");
      hash.update(fs.readlinkSync(absolute));
    } else {
      hash.update(fs.readFileSync(absolute));
    }
    hash.update("\0");
  }
  return `sha256:${hash.digest("hex")}`;
}

function sha256File(file) {
  return crypto.createHash("sha256").update(fs.readFileSync(file)).digest("hex");
}

function sha256Buffer(buffer) {
  return crypto.createHash("sha256").update(buffer).digest("hex");
}

function sourceTreeDigest(sourceCommit) {
  const archive = cp.execFileSync("git", ["archive", "--format=tar", sourceCommit], {
    cwd: repo,
    encoding: null,
    maxBuffer: 128 * 1024 * 1024,
    stdio: ["ignore", "pipe", "inherit"],
    env: nonInteractiveGitEnv(),
  });
  return `sha256:${sha256Buffer(archive)}`;
}

function evidenceIdentity(value) {
  const serialized = JSON.stringify(value === undefined ? null : value);
  return `sha256:${sha256Buffer(Buffer.from(serialized, "utf8"))}`;
}

function sanitizeEvidence(value, key = "") {
  const secretKey = /(?:token|secret|password|cookie|authorization|private_key)/iu.test(
    key
  );
  if (secretKey && typeof value === "string") return "[redacted]";
  if (secretKey && Array.isArray(value)) return ["[redacted]"];
  if (Array.isArray(value)) {
    return value.map((entry) => sanitizeEvidence(entry));
  }
  if (value && typeof value === "object") {
    return Object.fromEntries(
      Object.entries(value).map(([childKey, childValue]) => [
        childKey,
        sanitizeEvidence(childValue, childKey),
      ])
    );
  }
  return value;
}

function renderFinalTranscript(result) {
  const lines = [
    "Clusterflux final release transcript",
    `Source commit: ${result.source_commit}`,
    `Source tree digest: ${result.source_tree_digest}`,
    `Public tree identity: ${result.public_tree_identity}`,
    `Acceptance result recorded: ${result.timestamps.acceptance_result_recorded_at}`,
    `Evidence packaged: ${result.timestamps.evidence_packaged_at}`,
    `Deployment generation: ${result.deployment.system_generation}`,
    `Deployment identity: ${result.deployment.identity}`,
    `Configuration identity: ${result.configuration_identity}`,
    "",
    "Commands:",
    ...result.release_commands.map((command) => `- ${command}`),
    "",
    "Binary digests:",
    ...Object.entries(result.binary_digests).map(
      ([name, digest]) => `- ${name}: ${digest}`
    ),
    "",
    "Named scenarios:",
    ...result.named_scenarios.map(
      (scenario) =>
        `- ${scenario.id}: ${scenario.status} (${scenario.duration_ms} ms)`
    ),
    "",
    "Strict requirement ledger:",
    ...result.strict_requirement_ledger.map(
      (requirement) =>
        `- ${requirement.id}: ${requirement.passed ? "passed" : "failed"}`
    ),
    "",
    `Scenario skips: ${JSON.stringify(result.scenario_skips)}`,
    `Acceptance result: ${result.acceptance_result}`,
    "",
    "Failure-injection and complete machine evidence:",
    JSON.stringify(result, null, 2),
    "",
  ];
  return `${lines.join("\n")}\n`;
}

function tarGz(output, cwd, inputs) {
  run("tar", ["-czf", output, "-C", cwd, ...inputs]);
}

function platformName() {
  return `${os.platform()}-${os.arch()}`;
}

function binaryName(name) {
  return process.platform === "win32" ? `${name}.exe` : name;
}

function buildPublicBinaries() {
  run("cargo", ["build", "--locked", "--workspace", "--bins", "--release", "--jobs", "2"], {
    cwd: publicTree,
    env: { ...process.env, CARGO_TARGET_DIR: publicBuildTarget },
  });
}

function buildHostedBinary() {
  run(
    "cargo",
    [
      "build",
      "--locked",
      "--manifest-path",
      "private/hosted-policy/Cargo.toml",
      "--bin",
      hostedBinary,
      "--release",
      "--jobs",
      "2",
    ],
    {
      cwd: repo,
      env: { ...process.env, CARGO_TARGET_DIR: hostedBuildTarget },
    }
  );
}

function stageBinaryAssets(releaseName) {
  const stageRoot = path.join(stagingDir, "binaries");
  const binDir = path.join(stageRoot, "bin");
  fs.rmSync(stageRoot, { recursive: true, force: true });
  ensureDir(binDir);

  for (const binary of publicBinaries) {
    const fileName = binaryName(binary);
    const built = path.join(publicBuildTarget, "release", fileName);
    if (!fs.existsSync(built)) {
      throw new Error(`expected release binary ${built}`);
    }
    const staged = path.join(binDir, fileName);
    fs.copyFileSync(built, staged);
    fs.chmodSync(staged, 0o755);
  }

  const archive = path.join(
    assetsDir,
    `clusterflux-public-binaries-${releaseName}-${platformName()}.tar.gz`
  );
  tarGz(archive, stageRoot, ["."]);
  return archive;
}

function stageHostedBinaryAsset(releaseName) {
  const stageRoot = path.join(stagingDir, "hosted-binary");
  const binDir = path.join(stageRoot, "bin");
  fs.rmSync(stageRoot, { recursive: true, force: true });
  ensureDir(binDir);
  const fileName = binaryName(hostedBinary);
  const built = path.join(hostedBuildTarget, "release", fileName);
  if (!fs.existsSync(built)) {
    throw new Error(`expected hosted release binary ${built}`);
  }
  const staged = path.join(binDir, fileName);
  fs.copyFileSync(built, staged);
  fs.chmodSync(staged, 0o755);
  const archive = path.join(
    assetsDir,
    `clusterflux-hosted-${releaseName}-${platformName()}.tar.gz`
  );
  tarGz(archive, stageRoot, ["."]);
  return archive;
}

function publicBinaryDigests() {
  return Object.fromEntries(
    publicBinaries.map((binary) => {
      const fileName = binaryName(binary);
      const file = path.join(publicBuildTarget, "release", fileName);
      if (!fs.existsSync(file)) throw new Error(`missing built release binary ${file}`);
      return [fileName, `sha256:${sha256File(file)}`];
    })
  );
}

function candidateBinaryDigests() {
  const fileName = binaryName(hostedBinary);
  const file = path.join(hostedBuildTarget, "release", fileName);
  if (!fs.existsSync(file)) throw new Error(`missing hosted release binary ${file}`);
  return {
    ...publicBinaryDigests(),
    [fileName]: `sha256:${sha256File(file)}`,
  };
}

function reuseCandidateBinaries(candidate, releaseName) {
  assertCandidateManifest(candidate);
  const asset = candidate.assets.find((entry) =>
    entry.name.startsWith("clusterflux-public-binaries-")
  );
  if (!asset || !fs.existsSync(asset.file)) {
    throw new Error("release candidate binary archive is missing");
  }
  if (sha256File(asset.file) !== asset.sha256) {
    throw new Error("release candidate binary archive digest changed after candidate creation");
  }
  const archive = path.join(
    assetsDir,
    `clusterflux-public-binaries-${releaseName}-${platformName()}.tar.gz`
  );
  fs.copyFileSync(asset.file, archive);
  const extractRoot = path.join(stagingDir, "candidate-binaries");
  fs.rmSync(extractRoot, { recursive: true, force: true });
  ensureDir(extractRoot);
  run("tar", ["-xzf", archive, "-C", extractRoot]);
  for (const name of publicBinaries.map(binaryName)) {
    const digest = candidate.binary_digests[name];
    const binary = path.join(extractRoot, "bin", name);
    if (!fs.existsSync(binary) || `sha256:${sha256File(binary)}` !== digest) {
      throw new Error(`release candidate binary ${name} does not match ${digest}`);
    }
  }
  return archive;
}

function reuseCandidateHostedBinary(candidate, releaseName) {
  assertCandidateManifest(candidate);
  const asset = candidate.assets.find((entry) =>
    entry.name.startsWith("clusterflux-hosted-")
  );
  if (!asset || !fs.existsSync(asset.file)) {
    throw new Error("release candidate hosted binary archive is missing");
  }
  if (sha256File(asset.file) !== asset.sha256) {
    throw new Error("release candidate hosted archive digest changed after creation");
  }
  const archive = path.join(
    assetsDir,
    `clusterflux-hosted-${releaseName}-${platformName()}.tar.gz`
  );
  fs.copyFileSync(asset.file, archive);
  const extractRoot = path.join(stagingDir, "candidate-hosted-binary");
  fs.rmSync(extractRoot, { recursive: true, force: true });
  ensureDir(extractRoot);
  run("tar", ["-xzf", archive, "-C", extractRoot]);
  const name = binaryName(hostedBinary);
  const binary = path.join(extractRoot, "bin", name);
  const digest = candidate.binary_digests[name];
  if (!fs.existsSync(binary) || `sha256:${sha256File(binary)}` !== digest) {
    throw new Error(`release candidate hosted binary ${name} does not match ${digest}`);
  }
  return archive;
}

function assertCandidateManifest(candidate) {
  if (candidate.kind !== "clusterflux-public-release") {
    throw new Error("release candidate manifest has the wrong kind");
  }
  if (candidate.release_candidate?.mode !== "built-once") {
    throw new Error("release finalization requires a built-once candidate manifest");
  }
  if (!candidate.binary_digests || !Object.keys(candidate.binary_digests).length) {
    throw new Error("release candidate manifest omitted binary digests");
  }
  if (!candidate.binary_digests[binaryName(hostedBinary)]) {
    throw new Error("release candidate omitted the hosted service binary digest");
  }
  if (!candidate.release_candidate.hosted_binary_archive_sha256) {
    throw new Error("release candidate omitted the hosted service archive digest");
  }
}

function stageEvidenceAsset(
  releaseName,
  sourceCommit,
  sourceDigest,
  publicTreeIdentity,
  binaryDigests,
  candidateBinding,
  candidateConfigurationIdentity,
  candidateProxyConfigurationIdentity
) {
  const stage = path.join(stagingDir, "evidence");
  fs.rmSync(stage, { recursive: true, force: true });
  ensureDir(stage);
  const evidenceRoot = path.join(repo, "target/acceptance");
  const included = [];
  for (const name of ["public-environment.json", "wasmtime-assignment.json"]) {
    const source = path.join(evidenceRoot, name);
    if (!fs.existsSync(source)) continue;
    fs.copyFileSync(source, path.join(stage, name));
    included.push(name);
  }
  const acceptancePath = path.resolve(
    process.env.CLUSTERFLUX_FINAL_RESULT_PATH ||
      path.join(evidenceRoot, "cli-happy-path-live.json")
  );
  const legacyIncompleteEvidenceEnv = [
    "CLUSTERFLUX",
    "ALLOW",
    "INCOMPLETE",
    "RELEASE",
    "EVIDENCE",
  ].join("_");
  if (process.env[legacyIncompleteEvidenceEnv]) {
    throw new Error(
      "the legacy incomplete-evidence environment switch is unsupported; use CLUSTERFLUX_RELEASE_STAGE=candidate or final"
    );
  }
  const releaseStage =
    process.env.CLUSTERFLUX_RELEASE_STAGE ||
    (candidateManifestPath ? "final" : "candidate");
  if (!new Set(["candidate", "final"]).has(releaseStage)) {
    throw new Error("CLUSTERFLUX_RELEASE_STAGE must be candidate or final");
  }
  const allowIncomplete = releaseStage === "candidate";
  let finalEvidence = {
    complete: false,
    result: null,
    transcript: null,
    acceptance_result_recorded_at: null,
    deployment_identity: null,
    configuration_identity: null,
  };

  if (fs.existsSync(acceptancePath)) {
    const liveResult = JSON.parse(fs.readFileSync(acceptancePath, "utf8"));
    if (liveResult.source_commit === sourceCommit) {
      if (liveResult.acceptance_result !== "passed") {
        throw new Error("final live acceptance result is not passed");
      }
      if (liveResult.source_tree_digest !== sourceDigest) {
        throw new Error("final live acceptance source-tree digest does not match the candidate");
      }
      if (liveResult.public_tree_identity !== publicTreeIdentity) {
        throw new Error("final live acceptance public-tree identity does not match the candidate");
      }
      if (
        JSON.stringify(liveResult.binary_digests) !== JSON.stringify(binaryDigests) ||
        JSON.stringify(liveResult.release_binding?.binary_digests) !==
          JSON.stringify(binaryDigests)
      ) {
        throw new Error("final live acceptance binaries do not match the exact candidate");
      }
      if (liveResult.release_binding?.source_commit !== sourceCommit) {
        throw new Error("final live acceptance release binding has the wrong source commit");
      }
      if (!Array.isArray(liveResult.scenario_skips) || liveResult.scenario_skips.length) {
        throw new Error("final live acceptance result contains unresolved scenario skips");
      }
      if (
        !Array.isArray(liveResult.named_scenarios) ||
        liveResult.named_scenarios.length !== 25 ||
        liveResult.named_scenarios.some((scenario) => scenario.status !== "passed")
      ) {
        throw new Error("all twenty-five named final live checks must pass");
      }
      if (
        !liveResult.release_binding?.deployment ||
        !liveResult.release_binding?.configuration ||
        !liveResult.release_binding?.proxy_configuration
      ) {
        throw new Error(
          "final live evidence must bind deployment, runtime configuration, and proxy configuration identities"
        );
      }
      if (
        !Array.isArray(liveResult.strict_requirement_ledger) ||
        !liveResult.strict_requirement_ledger.length ||
        liveResult.strict_requirement_ledger.some((requirement) => requirement.passed !== true)
      ) {
        throw new Error("the strict final requirement ledger must be complete and passed");
      }
      const deploymentGeneration =
        process.env.CLUSTERFLUX_DEPLOYMENT_SYSTEM_GENERATION ||
        liveResult.release_binding?.deployment?.system_generation ||
        null;
      if (!deploymentGeneration && !allowIncomplete) {
        throw new Error(
          "CLUSTERFLUX_DEPLOYMENT_SYSTEM_GENERATION is required for final evidence"
        );
      }
      const recordedAt = fs.statSync(acceptancePath).mtime.toISOString();
      const packagedAt = new Date().toISOString();
      const sanitized = sanitizeEvidence(liveResult);
      const finalResult = {
        ...sanitized,
        kind: "clusterflux-final-release-result",
        source_commit: sourceCommit,
        source_tree_digest: sourceDigest,
        public_tree_identity: publicTreeIdentity,
        binary_digests: binaryDigests,
        release_candidate: candidateBinding,
        deployment: {
          system_generation: deploymentGeneration,
          identity: evidenceIdentity(liveResult.release_binding?.deployment),
        },
        configuration_identity: evidenceIdentity(
          liveResult.release_binding?.configuration
        ),
        timestamps: {
          acceptance_result_recorded_at: recordedAt,
          evidence_packaged_at: packagedAt,
        },
        release_commands: [
          "nix develop -c ./scripts/acceptance-private.sh",
          "nix develop -c ./scripts/acceptance-public.sh",
          "node scripts/cli-happy-path-live-smoke.js (strict production-shaped environment)",
        ],
      };
      const resultName = "FINAL_RELEASE_RESULT.json";
      const transcriptName = "FINAL_RELEASE_TRANSCRIPT.txt";
      const resultPath = path.join(stage, resultName);
      const transcriptPath = path.join(stage, transcriptName);
      fs.writeFileSync(resultPath, `${JSON.stringify(finalResult, null, 2)}\n`);
      fs.writeFileSync(transcriptPath, renderFinalTranscript(finalResult));
      included.push(resultName, transcriptName);
      finalEvidence = {
        complete: true,
        result: {
          name: resultName,
          sha256: sha256File(resultPath),
        },
        transcript: {
          name: transcriptName,
          sha256: sha256File(transcriptPath),
        },
        acceptance_result_recorded_at: recordedAt,
        deployment_identity: finalResult.deployment.identity,
        configuration_identity: finalResult.configuration_identity,
      };
    } else if (!allowIncomplete) {
      throw new Error(
        `final live acceptance commit ${liveResult.source_commit} does not match ${sourceCommit}`
      );
    }
  } else if (!allowIncomplete) {
    throw new Error(`missing final live acceptance result: ${acceptancePath}`);
  }

  const binding = {
    kind: "clusterflux-release-evidence-binding",
    source_commit: sourceCommit,
    source_tree_digest: sourceDigest,
    public_tree_identity: publicTreeIdentity,
    binary_digests: binaryDigests,
    release_candidate: candidateBinding,
    candidate_configuration_identity: candidateConfigurationIdentity,
    candidate_proxy_configuration_identity: candidateProxyConfigurationIdentity,
    configuration_generation:
      process.env.CLUSTERFLUX_DEPLOYMENT_SYSTEM_GENERATION || null,
    final_evidence: finalEvidence,
    included_evidence: included.map((name) => ({
      name,
      sha256: sha256File(path.join(stage, name)),
    })),
  };
  fs.writeFileSync(
    path.join(stage, "EVIDENCE_BINDING.json"),
    `${JSON.stringify(binding, null, 2)}\n`
  );
  const archive = path.join(
    assetsDir,
    `clusterflux-public-evidence-${releaseName}.tar.gz`
  );
  tarGz(archive, stage, ["."]);
  return { archive, finalEvidence };
}

function stageSourceAsset(releaseName) {
  const archive = path.join(assetsDir, `clusterflux-public-source-${releaseName}.tar.gz`);
  tarGz(archive, publicTree, ["."]);
  return archive;
}

function stageExtensionAsset() {
  const packageJson = JSON.parse(
    fs.readFileSync(path.join(publicTree, "vscode-extension/package.json"), "utf8")
  );
  const archive = path.join(
    assetsDir,
    `${packageJson.name}-${packageJson.version}.vsix`
  );
  run(
    "npx",
    [
      "--yes",
      "@vscode/vsce",
      "package",
      "--allow-missing-repository",
      "--skip-license",
      "--out",
      archive,
    ],
    { cwd: path.join(publicTree, "vscode-extension") }
  );
  return archive;
}

function resolverInstructions() {
  if (process.env.CLUSTERFLUX_PUBLIC_RELEASE_RESOLVER_INSTRUCTIONS) {
    return process.env.CLUSTERFLUX_PUBLIC_RELEASE_RESOLVER_INSTRUCTIONS.trim();
  }
  if (process.env.CLUSTERFLUX_PUBLIC_RELEASE_HOSTS_ENTRY) {
    return [
      "Add the controlled hosts entry supplied for this release:",
      "",
      "```",
      process.env.CLUSTERFLUX_PUBLIC_RELEASE_HOSTS_ENTRY.trim(),
      "```",
    ].join("\n");
  }
  if (process.env.CLUSTERFLUX_PUBLIC_RELEASE_IP) {
    return [
      "Add this controlled hosts entry for the release:",
      "",
      "```",
      `${process.env.CLUSTERFLUX_PUBLIC_RELEASE_IP} clusterflux.michelpaulissen.com`,
      "```",
    ].join("\n");
  }
  return [
    "`clusterflux.michelpaulissen.com` should resolve through public DNS. If it",
    "does not resolve yet, wait for DNS propagation or use the fallback hosts",
    "entry supplied with the invitation.",
  ].join("\n");
}

function writeGettingStartedAsset(releaseName, publicTreeIdentity, resolution) {
  const file = path.join(assetsDir, `CLUSTERFLUX_GETTING_STARTED-${releaseName}.md`);
  fs.writeFileSync(
    file,
    `# Clusterflux Getting Started

Use the public repository and release downloads with the hosted coordinator at
\`https://clusterflux.michelpaulissen.com\`.

## DNS

${resolution}

## Install

1. Download the binary archive for your platform from the Forgejo release.
2. Check the archive against \`SHA256SUMS\`.
3. Extract it and put \`bin/\` on your \`PATH\`.
4. Install \`clusterflux-vscode-*.vsix\` when you want the VS Code debugger:

\`\`\`bash
code --install-extension clusterflux-vscode-*.vsix
\`\`\`

## Sign in and run

\`\`\`bash
clusterflux login --browser
clusterflux auth status
clusterflux project list
clusterflux bundle inspect --project examples/hello-build
\`\`\`

The CLI opens the server-provided Authentik authorization URL. State, nonce,
PKCE, provider code exchange, and userinfo remain on the hosted service. The CLI
stores only the resulting scoped Clusterflux session.

Create a node enrollment grant, attach the node, and start the worker:

\`\`\`bash
clusterflux node enroll --project-id <project-id> --json
clusterflux node attach --project-id <project-id> --node workstation \\
  --enrollment-grant "$ENROLLMENT_GRANT"
clusterflux-node --coordinator https://clusterflux.michelpaulissen.com \\
  --tenant <tenant> --project-id <project-id> --node workstation \\
  --project-root "$PWD" --worker --emit-ready
\`\`\`

Then run the workflow:

\`\`\`bash
clusterflux run --project examples/hello-build build
\`\`\`

Public tree identity: \`${publicTreeIdentity}\`
Release name: \`${releaseName}\`
`,
    "utf8"
  );
  return file;
}

function writeReleaseNotesAsset(releaseName, publicTreeIdentity, resolution) {
  const file = path.join(assetsDir, `CLUSTERFLUX_RELEASE_NOTES-${releaseName}.md`);
  const publicRepo =
    process.env.CLUSTERFLUX_PUBLIC_REPO_URL ||
    "https://git.michelpaulissen.com/michel/clusterflux-public";
  const releaseUrl =
    process.env.CLUSTERFLUX_FORGEJO_RELEASE_URL ||
    "the Forgejo release attached to the public repository";
  fs.writeFileSync(
    file,
    `# Clusterflux Release Notes

Use this release with the public Clusterflux repository and hosted coordinator.

## Links

- Public repository: ${publicRepo}
- Release downloads: ${releaseUrl}
- Hosted coordinator: ${defaultHostedCoordinatorEndpoint}
- Public tree identity: ${publicTreeIdentity}
- Release name: ${releaseName}

## DNS

${resolution}

## First run

1. Download the archive for your platform and \`SHA256SUMS\`.
2. Extract the archive and put \`bin/\` on your \`PATH\`.
3. Optionally install the VS Code extension archive.
4. Run \`clusterflux login --browser\`.
5. Run \`clusterflux node enroll\`, attach your node, and start the worker.
6. Run \`clusterflux run --project examples/hello-build build\`.
`,
    "utf8"
  );
  return file;
}

function writeSha256Sums(assets) {
  const sumsPath = path.join(assetsDir, "SHA256SUMS");
  const lines = assets
    .map((asset) => `${sha256File(asset)}  ${path.basename(asset)}`)
    .sort()
    .join("\n");
  fs.writeFileSync(sumsPath, `${lines}\n`);
  return sumsPath;
}

function boolEnv(name) {
  return /^(1|true|yes)$/i.test(process.env[name] || "");
}

function writePublicTreeProvenance(sourceCommit, releaseName) {
  const provenance = {
    kind: "clusterflux-filtered-public-tree",
    source_commit: sourceCommit,
    release_name: releaseName,
    filtered_out: filteredOutPatterns(),
    public_export: {
      host_neutral: !includeForgejoWorkflows,
      include_forgejo_workflows: includeForgejoWorkflows,
    },
    forgejo_host: forgejoHost,
    default_hosted_coordinator_endpoint: defaultHostedCoordinatorEndpoint,
  };
  fs.writeFileSync(
    path.join(publicTree, "CLUSTERFLUX_PUBLIC_TREE.json"),
    `${JSON.stringify(provenance, null, 2)}\n`
  );
}

function publishPublicTree(releaseName, sourceCommit, publicTreeIdentity) {
  const remote =
    process.env.CLUSTERFLUX_PUBLIC_REPO_REMOTE ||
    process.env.CLUSTERFLUX_PUBLIC_REPO_URL ||
    null;
  const enabled = boolEnv("CLUSTERFLUX_PUBLISH_PUBLIC_TREE");
  const result = {
    enabled,
    remote,
    branch: publicRepoBranch,
    commit: null,
    pushed: false,
  };

  if (!enabled) {
    return result;
  }
  if (!remote) {
    throw new Error(
      "CLUSTERFLUX_PUBLISH_PUBLIC_TREE requires CLUSTERFLUX_PUBLIC_REPO_REMOTE or CLUSTERFLUX_PUBLIC_REPO_URL"
    );
  }
  if (!remote.includes(forgejoHost)) {
    throw new Error(`public repo remote must point at ${forgejoHost}: ${remote}`);
  }

  run("git", ["init"], { cwd: publicTree });
  run("git", ["config", "user.name", "Clusterflux release"], {
    cwd: publicTree,
  });
  run("git", ["config", "user.email", "release@clusterflux.invalid"], {
    cwd: publicTree,
  });
  run("git", ["add", "."], { cwd: publicTree });
  const tree = commandOutput("git", ["write-tree"], { cwd: publicTree });
  run("git", ["remote", "add", "public", remote], { cwd: publicTree });
  run(
    "git",
    [
      "fetch",
      "public",
      `refs/heads/${publicRepoBranch}:refs/remotes/public/${publicRepoBranch}`,
    ],
    { cwd: publicTree }
  );
  const parent = commandOutput(
    "git",
    ["rev-parse", `refs/remotes/public/${publicRepoBranch}`],
    { cwd: publicTree }
  );
  result.commit = commandOutput(
    "git",
    [
      "commit-tree",
      tree,
      "-p",
      parent,
      "-m",
      `Public release ${releaseName}`,
      "-m",
      `Source commit: ${sourceCommit}`,
      "-m",
      `Public tree identity: ${publicTreeIdentity}`,
    ],
    { cwd: publicTree }
  );
  run("git", ["update-ref", `refs/heads/${publicRepoBranch}`, result.commit], {
    cwd: publicTree,
  });
  run("git", ["push", "public", `${result.commit}:${publicRepoBranch}`], {
    cwd: publicTree,
  });
  result.pushed = true;
  return result;
}

function main() {
  const sourceCommit = commandOutput("git", ["rev-parse", "HEAD"]);
  if (!sourceCommit || !/^[0-9a-f]{40}$/u.test(sourceCommit)) {
    throw new Error("the public release requires an exact Git HEAD object id");
  }
  const acceptanceCommit = process.env.CLUSTERFLUX_ACCEPTANCE_COMMIT?.trim();
  if (acceptanceCommit && acceptanceCommit !== sourceCommit) {
    throw new Error(
      `CLUSTERFLUX_ACCEPTANCE_COMMIT ${acceptanceCommit} does not match source HEAD ${sourceCommit}`
    );
  }
  const shortCommit = sourceCommit.slice(0, 12);
  const releaseName = process.env.CLUSTERFLUX_PUBLIC_RELEASE_NAME || `release-${shortCommit}`;
  const sourceDigest = sourceTreeDigest(sourceCommit);
  const candidate = candidateManifestPath
    ? JSON.parse(fs.readFileSync(candidateManifestPath, "utf8"))
    : null;
  if (candidate) {
    for (const asset of candidate.assets ?? []) {
      asset.file = path.isAbsolute(asset.file)
        ? asset.file
        : path.resolve(path.dirname(candidateManifestPath), asset.file);
    }
  }
  const releaseStage =
    process.env.CLUSTERFLUX_RELEASE_STAGE ||
    (candidateManifestPath ? "final" : "candidate");
  if (releaseStage === "final" && !candidate) {
    throw new Error("final release stage requires CLUSTERFLUX_RELEASE_CANDIDATE_MANIFEST");
  }
  if (releaseStage === "candidate" && candidate) {
    throw new Error("candidate release stage cannot consume a prior candidate manifest");
  }
  if (
    releaseStage === "candidate" &&
    (!process.env.CLUSTERFLUX_CANDIDATE_CONFIGURATION_IDENTITY ||
      !process.env.CLUSTERFLUX_CANDIDATE_PROXY_CONFIGURATION_IDENTITY)
  ) {
    throw new Error(
      "candidate release stage requires configuration and proxy configuration identities"
    );
  }
  if (candidate) {
    assertCandidateManifest(candidate);
    if (path.dirname(candidateManifestPath) === outputRoot) {
      throw new Error("candidate and finalized release must use different output directories");
    }
    if (candidate.source_commit !== sourceCommit) {
      throw new Error("release candidate source commit does not match Git HEAD");
    }
    if (candidate.source_tree_digest !== sourceDigest) {
      throw new Error("release candidate source tree digest does not match Git HEAD");
    }
    if (candidate.release_name !== releaseName) {
      throw new Error("release candidate name does not match the finalized release name");
    }
  }
  const sourceStatus = commandOutput("git", ["status", "--short"]);
  if (sourceStatus === null) {
    throw new Error("the public release must be prepared from a Git checkout");
  }
  if (sourceStatus !== "") {
    throw new Error("the public release must be prepared from a clean source tree");
  }
  const sourceTreeClean = true;

  fs.rmSync(outputRoot, { recursive: true, force: true });
  ensureDir(publicTree);
  ensureDir(assetsDir);
  ensureDir(stagingDir);

  const ignoredSourcePaths = gitIgnoredSourcePaths();
  copyFilteredTree(repo, publicTree, ignoredSourcePaths);
  assertFilteredTree(ignoredSourcePaths);
  writePublicTreeProvenance(sourceCommit, releaseName);
  const publicTreeIdentity = hashTree(publicTree);
  if (candidate && candidate.public_tree_identity !== publicTreeIdentity) {
    throw new Error("release candidate public tree identity changed before finalization");
  }
  const sourceArchive = stageSourceAsset(releaseName);

  run("scripts/check-old-name.sh", [], { cwd: publicTree });
  run("node", ["scripts/check-docs.js"], { cwd: publicTree });
  run("scripts/check-code-size.sh", [], { cwd: publicTree });
  const publicTreePublish = publishPublicTree(
    releaseName,
    sourceCommit,
    publicTreeIdentity
  );
  let binaryArchive;
  let hostedBinaryArchive;
  let binaryDigests;
  let candidateBinding;
  if (candidate) {
    binaryArchive = reuseCandidateBinaries(candidate, releaseName);
    hostedBinaryArchive = reuseCandidateHostedBinary(candidate, releaseName);
    binaryDigests = candidate.binary_digests;
    candidateBinding = {
      mode: "finalized-exact",
      manifest: path.relative(outputRoot, candidateManifestPath).split(path.sep).join("/"),
      manifest_sha256: sha256File(candidateManifestPath),
      binary_archive_sha256: sha256File(binaryArchive),
      hosted_binary_archive_sha256: sha256File(hostedBinaryArchive),
    };
  } else {
    buildPublicBinaries();
    buildHostedBinary();
    binaryArchive = stageBinaryAssets(releaseName);
    hostedBinaryArchive = stageHostedBinaryAsset(releaseName);
    binaryDigests = candidateBinaryDigests();
    candidateBinding = {
      mode: "built-once",
      binary_archive_sha256: sha256File(binaryArchive),
      hosted_binary_archive_sha256: sha256File(hostedBinaryArchive),
    };
  }
  const candidateConfigurationIdentity =
    candidate?.candidate_configuration_identity ||
    process.env.CLUSTERFLUX_CANDIDATE_CONFIGURATION_IDENTITY ||
    null;
  const candidateProxyConfigurationIdentity =
    candidate?.candidate_proxy_configuration_identity ||
    process.env.CLUSTERFLUX_CANDIDATE_PROXY_CONFIGURATION_IDENTITY ||
    null;
  const evidence = stageEvidenceAsset(
    releaseName,
    sourceCommit,
    sourceDigest,
    publicTreeIdentity,
    binaryDigests,
    candidateBinding,
    candidateConfigurationIdentity,
    candidateProxyConfigurationIdentity
  );
  const evidenceArchive = evidence.archive;
  const extensionArchive = stageExtensionAsset();
  const resolution = resolverInstructions();
  const gettingStarted = writeGettingStartedAsset(
    releaseName,
    publicTreeIdentity,
    resolution
  );
  const invite = writeReleaseNotesAsset(releaseName, publicTreeIdentity, resolution);
  const assets = [
    sourceArchive,
    binaryArchive,
    hostedBinaryArchive,
    evidenceArchive,
    extensionArchive,
    gettingStarted,
    invite,
  ];
  const sha256Sums = writeSha256Sums(assets);

  const manifest = {
    kind: "clusterflux-public-release",
    release_name: releaseName,
    source_commit: sourceCommit,
    source_tree_digest: sourceDigest,
    source_tree_clean: sourceTreeClean,
    public_tree_identity: publicTreeIdentity,
    public_tree: publicTree,
    filtered_out: filteredOutPatterns(),
    public_export: {
      host_neutral: !includeForgejoWorkflows,
      include_forgejo_workflows: includeForgejoWorkflows,
    },
    forgejo_host: forgejoHost,
    public_repo_url: process.env.CLUSTERFLUX_PUBLIC_REPO_URL || publicTreePublish.remote,
    public_repo_remote: process.env.CLUSTERFLUX_PUBLIC_REPO_REMOTE || null,
    public_tree_publish: publicTreePublish,
    forgejo_release_url: process.env.CLUSTERFLUX_FORGEJO_RELEASE_URL || null,
    default_hosted_coordinator_endpoint: defaultHostedCoordinatorEndpoint,
    dns_publication_state:
      process.env.CLUSTERFLUX_DNS_PUBLICATION_STATE || "published",
    resolver_override:
      process.env.CLUSTERFLUX_RESOLVER_OVERRIDE || "none-required-public-dns",
    platform: platformName(),
    binary_digests: binaryDigests,
    release_candidate: candidateBinding,
    candidate_configuration_identity: candidateConfigurationIdentity,
    candidate_proxy_configuration_identity: candidateProxyConfigurationIdentity,
    configuration_generation:
      process.env.CLUSTERFLUX_DEPLOYMENT_SYSTEM_GENERATION || null,
    final_evidence: evidence.finalEvidence,
    tool_versions: {
      node: process.version,
      rustc: commandOutput("rustc", ["--version"]) || null,
      cargo: commandOutput("cargo", ["--version"]) || null,
      tar: commandOutput("tar", ["--version"]) || null,
    },
    commands: [
      "scripts/check-old-name.sh",
      "node scripts/check-docs.js",
      "scripts/check-code-size.sh",
      ...(publicTreePublish.enabled
        ? [`git push public HEAD:${publicRepoBranch}`]
        : []),
      ...(candidate
        ? ["finalize exact public and hosted binaries from CLUSTERFLUX_RELEASE_CANDIDATE_MANIFEST"]
        : [
            "cargo build --locked --workspace --bins --release --jobs 2",
            "cargo build --locked --manifest-path private/hosted-policy/Cargo.toml --bin clusterflux-hosted-service --release --jobs 2",
          ]),
    ],
    assets: [...assets, sha256Sums].map((asset) => ({
      file: path.relative(outputRoot, asset).split(path.sep).join("/"),
      name: path.basename(asset),
      sha256: sha256File(asset),
    })),
    notes: [
      "Upload the assets to the Forgejo Release for the filtered public repository.",
      "The real service deployment and full e2e release remain separate acceptance evidence.",
    ],
  };

  const manifestPath = path.join(outputRoot, "public-release-manifest.json");
  fs.writeFileSync(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`);
  console.log(JSON.stringify({ manifest: manifestPath, assets: assetsDir }, null, 2));
}

main();