// scripts/ci/publish-forgejo-release.mjs
// Canonical release publisher for D3RO Voice.
//
// Tag 파이프라인의 release 스테이지에서 실행:
//   1) apps/desktop/release/<version>/ 자산을 Forgejo Generic Package Registry에 업로드
//      - 버전별 경로: /api/packages/<owner>/generic/d3ro-voice/<version>/<file>
//      - latest 경로:  /api/packages/<owner>/generic/d3ro-voice/latest/<file>  (electron-updater feed)
//   2) release/update-policy.json을 latest feed에 게시 (원격 정책/킬 스위치)
//   3) Forgejo Release 생성/갱신 + 설치 자산 첨부 (admin·site 다운로드 허브)
//
// 배포 순서 보장: 설치파일/blockmap을 먼저 올리고 update metadata(latest.yml)를
// 마지막에 게시한다. 기존 설치본이 배포 도중 404를 받지 않는다.
//
// 필요 env:
//   FORGEJO_TOKEN (write:package + write:repository) 또는 FORGEJO_USERNAME/FORGEJO_PASSWORD
//   선택: FORGEJO_REPO=git.chanpaca.net/yunchan/d3ro-voice
//   선택: FORGEJO_RELEASE_TAG (기본: CI_COMMIT_TAG/GITHUB_REF_NAME/FORGEJO_REF_NAME)
//   선택: FORGEJO_PUBLISH_DRY_RUN=1 (업로드 없이 사전점검)

import { createHash } from "node:crypto";
import { createReadStream, readFileSync } from "node:fs";
import { readFile, readdir, stat } from "node:fs/promises";
import { basename, join } from "node:path";
import process from "node:process";
import { fileURLToPath, URL } from "node:url";
import credentialHelpers from "../lib/credentials.cjs";

const { forgejoAuthorization } = credentialHelpers;

const DEFAULT_REPO = "git.chanpaca.net/yunchan/d3ro-voice";
const PACKAGE_NAME = "d3ro-voice";
const POLICY_FILENAME = "update-policy.json";

const dryRun = process.env.FORGEJO_PUBLISH_DRY_RUN === "1" || process.argv.includes("--check");

const tag = resolveTag();
if (!tag) throw new Error("Release tag is required (CI_COMMIT_TAG / GITHUB_REF_NAME / FORGEJO_REF_NAME).");
const version = tag.replace(/^v/, "");
if (!/^\d+\.\d+\.\d+$/.test(version)) {
  throw new Error(`Only stable semver release tags are supported by the canonical publisher: ${tag}`);
}

const { origin, owner, repo } = parseRepo(resolveRepoUrl());
const packageVersionedUrl = `${origin}/api/packages/${owner}/generic/${PACKAGE_NAME}/${version}`;
const packageLatestUrl = `${origin}/api/packages/${owner}/generic/${PACKAGE_NAME}/latest`;
const releasesApiUrl = `${origin}/api/v1/repos/${owner}/${repo}/releases`;

const authorization = dryRun && !process.env.FORGEJO_TOKEN && !process.env.FORGEJO_USERNAME
  ? null
  : forgejoAuthorization();

const productVersion = JSON.parse(
  await readFile(fileURLToPath(new URL("../../release/product-version.json", import.meta.url)), "utf8"),
);
if (tag !== `v${productVersion.version}`) {
  throw new Error(`Release tag ${tag} does not match product version v${productVersion.version}.`);
}

const policyPath = fileURLToPath(new URL("../../release/update-policy.json", import.meta.url));
const policyRaw = readFileSync(policyPath);
try {
  const policy = JSON.parse(policyRaw.toString("utf8"));
  if (policy.schemaVersion !== 1) throw new Error("unsupported schemaVersion");
} catch (error) {
  throw new Error(`update-policy.json is invalid: ${error instanceof Error ? error.message : String(error)}`);
}

const releaseDirectory = process.env.FORGEJO_RELEASE_DIR?.trim()
  ? process.env.FORGEJO_RELEASE_DIR.trim()
  : fileURLToPath(new URL(`../../apps/desktop/release/${version}/`, import.meta.url));
const ASSET_PATTERN = /(\.exe|\.dmg|\.zip|\.blockmap|^(latest|beta|alpha)(-mac|-linux)?\.yml)$/;

const files = [];
for (const name of await readdir(releaseDirectory)) {
  if (!ASSET_PATTERN.test(name)) continue;
  const path = join(releaseDirectory, name);
  if ((await stat(path)).isFile()) files.push({ name, path });
}
if (files.length === 0) throw new Error(`No release assets found in ${releaseDirectory}`);
if (!files.some((file) => file.name.endsWith(".exe"))) {
  throw new Error(`Windows installer is missing for ${tag}.`);
}
if (!files.some((file) => file.name === "latest.yml")) {
  throw new Error(`latest.yml is missing for ${tag} — check electron-builder.yml publish config.`);
}
if (!files.some((file) => file.name.endsWith(".dmg"))) {
  process.stdout.write(`WARNING: macOS artifacts missing for ${tag} — Windows-only release.\n`);
}

const sorted = files.sort((a, b) => a.name.localeCompare(b.name));
const sha256ByFile = new Map();
for (const file of sorted) sha256ByFile.set(file.name, await sha256(file.path));

if (dryRun) {
  process.stdout.write(
    `[forgejo] dry-run OK — ${tag}, ${sorted.length} assets, feed ${packageLatestUrl}\n`,
  );
  process.exit(0);
}

// 1) 버전별(immutable) 패키지 업로드
for (const file of sorted) {
  await uploadToRegistry(file, `${packageVersionedUrl}/${encodeURIComponent(safeAssetName(file.name))}`, {
    immutable: true,
  });
}

// 2) latest feed 갱신 — 설치 자산 먼저, metadata 마지막
const latestOrder = [...sorted].sort((a, b) => {
  const order = Number(isUpdateMetadata(a.name)) - Number(isUpdateMetadata(b.name));
  return order || a.name.localeCompare(b.name);
});
for (const file of latestOrder) {
  await uploadToRegistry(file, `${packageLatestUrl}/${encodeURIComponent(safeAssetName(file.name))}`, {
    replace: true,
  });
}
await uploadToRegistry(
  { name: POLICY_FILENAME, path: policyPath },
  `${packageLatestUrl}/${POLICY_FILENAME}`,
  { replace: true },
);

// 3) metadata 참조 검증 + 공개 URL 재검증
for (const file of latestOrder.filter((candidate) => isYamlUpdateMetadata(candidate.name))) {
  validateUpdateMetadataReferences(file, latestOrder);
}
for (const name of ["latest.yml", POLICY_FILENAME]) {
  await verifyPublicFile(`${packageLatestUrl}/${name}`);
}

// 4) Forgejo Release 생성/갱신 + 자산 첨부
const description = await buildReleaseDescription();
const releaseId = await upsertRelease(description);
for (const file of sorted) {
  await uploadReleaseAsset(releaseId, file);
}

process.stdout.write(`Published ${tag} to Forgejo (${sorted.length} assets, release ${releasesApiUrl}/${tag}).\n`);

// ── helpers ─────────────────────────────────────────────────

function resolveTag() {
  return (
    process.env.CI_COMMIT_TAG?.trim() ||
    process.env.FORGEJO_RELEASE_TAG?.trim() ||
    process.env.FORGEJO_REF_NAME?.trim() ||
    process.env.GITHUB_REF_NAME?.trim() ||
    process.argv.find((arg) => /^v\d+\.\d+\.\d+$/.test(arg)) ||
    ""
  );
}

function resolveRepoUrl() {
  const configured = process.env.FORGEJO_REPO?.trim();
  const value = configured || DEFAULT_REPO;
  return value.startsWith("http") ? value : `https://${value}`;
}

function parseRepo(rawUrl) {
  const parsed = new URL(rawUrl);
  if (parsed.protocol !== "https:") throw new Error("Forgejo repo URL must use HTTPS");
  const segments = parsed.pathname.split("/").filter(Boolean);
  if (segments.length !== 2) throw new Error("Forgejo repo URL must point to owner/repo");
  return { origin: parsed.origin, owner: segments[0], repo: segments[1] };
}

function safeAssetName(name) {
  return basename(name).replace(/[^A-Za-z0-9._-]+/g, "-");
}

function isUpdateMetadata(name) {
  return /(?:\.blockmap$|^(?:latest|beta|alpha)(?:-mac|-linux)?\.yml$|^update-policy\.json$)/.test(name);
}

function isYamlUpdateMetadata(name) {
  return /^(?:latest|beta|alpha)(?:-mac|-linux)?\.yml$/.test(name);
}

async function sha256(path) {
  const hash = createHash("sha256");
  await new Promise((resolve, reject) => {
    createReadStream(path)
      .on("data", (chunk) => hash.update(chunk))
      .on("end", resolve)
      .on("error", reject);
  });
  return hash.digest("hex");
}

async function uploadToRegistry(file, url, { replace = false, immutable = false } = {}) {
  const fileStat = await stat(file.path).catch(() => null);

  if (immutable) {
    // 버전별 패키지: 이미 동일 크기의 파일이 업로드되어 있다면 중복 전송 방지
    const head = await forgejoFetch(url, { method: "HEAD" }).catch(() => null);
    if (head && head.ok) {
      const remoteLength = head.headers.get("content-length");
      if (fileStat && remoteLength && Number(remoteLength) === fileStat.size) {
        process.stdout.write(`  verified existing immutable ${file.name} (${fileStat.size} bytes)\n`);
        return;
      }
    }
  }

  if (replace) {
    // replace 모드: 기존 파일이 있으면 먼저 삭제하여 409 Conflict 후 이중 전송으로 인한
    // Cloudflare 타임아웃(HTTP 524)을 원천 차단한다.
    await forgejoFetch(url, { method: "DELETE" }).catch(() => null);
  }

  const body = await readFile(file.path);
  const response = await forgejoFetch(url, {
    method: "PUT",
    headers: { "Content-Type": "application/octet-stream" },
    body,
  });

  if (response.ok) {
    process.stdout.write(`  uploaded ${file.name}\n`);
    return;
  }
  if (response.status === 409 && (replace || immutable)) {
    // 재실행/재시도: 기존 파일을 지우고 다시 올린다.
    await forgejoFetch(url, { method: "DELETE" });
    const retry = await forgejoFetch(url, {
      method: "PUT",
      headers: { "Content-Type": "application/octet-stream" },
      body,
    });
    if (!retry.ok) {
      throw new Error(`registry upload failed for ${file.name}: HTTP ${retry.status} ${await retry.text()}`);
    }
    process.stdout.write(`  replaced ${file.name}\n`);
    return;
  }
  throw new Error(`registry upload failed for ${file.name}: HTTP ${response.status} ${await response.text()}`);
}

function validateUpdateMetadataReferences(metadataFile, uploadedFiles) {
  const text = readFileSync(metadataFile.path, "utf8");
  const uploadedNames = new Set(uploadedFiles.map((file) => safeAssetName(file.name)));
  const references = [...text.matchAll(/^\s*(?:-\s+url:|path:)\s*["']?([^"'\r\n]+?)["']?\s*$/gm)].map(
    (match) => basename(match[1].trim()),
  );
  if (references.length === 0) {
    throw new Error(`${metadataFile.name} does not reference a release artifact.`);
  }
  for (const reference of references) {
    if (!uploadedNames.has(reference)) {
      throw new Error(`${metadataFile.name} references missing release artifact ${reference}.`);
    }
  }
}

async function verifyPublicFile(url) {
  const response = await fetch(`${url}?release=${encodeURIComponent(tag)}`, { cache: "no-store" });
  if (!response.ok) throw new Error(`Public updater verification failed for ${url}: HTTP ${response.status}`);
  const body = await response.text();
  if (!body.trim()) throw new Error(`Public updater file is empty: ${url}`);
}

async function buildReleaseDescription() {
  const changelog = await readFile(
    fileURLToPath(new URL("../../CHANGELOG.md", import.meta.url)),
    "utf8",
  );
  const section = extractChangelogSection(changelog, version);
  if (!section) throw new Error(`CHANGELOG.md is missing a ${version} release section.`);
  const checksums = [...sha256ByFile.entries()]
    .map(([name, hash]) => `- \`${name}\`: \`${hash}\``)
    .join("\n");
  return `${section}\n\n### SHA-256\n${checksums}`;
}

function extractChangelogSection(changelog, targetVersion) {
  const lines = changelog.split("\n");
  const escaped = targetVersion.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
  const headerPattern = new RegExp(`^##\\s+\\[?v?${escaped}(?:\\]|\\s|$)`);
  const start = lines.findIndex((line) => headerPattern.test(line));
  if (start === -1) return null;
  let end = lines.length;
  for (let index = start + 1; index < lines.length; index++) {
    if (/^##\s+/.test(lines[index])) {
      end = index;
      break;
    }
  }
  return lines.slice(start, end).join("\n").trim();
}

async function upsertRelease(description) {
  const byTag = await forgejoFetch(`${releasesApiUrl}/tags/${encodeURIComponent(tag)}`);
  if (byTag.ok) {
    const existing = await byTag.json();
    const update = await forgejoFetch(`${releasesApiUrl}/${existing.id}`, {
      method: "PATCH",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ name: `D3RO Voice ${tag}`, body: description, prerelease: false, draft: false }),
    });
    if (!update.ok) throw new Error(`release update failed: HTTP ${update.status} ${await update.text()}`);
    return existing.id;
  }
  if (byTag.status !== 404) {
    throw new Error(`release lookup failed: HTTP ${byTag.status} ${await byTag.text()}`);
  }

  const create = await forgejoFetch(releasesApiUrl, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      tag_name: tag,
      target_commitish: "main",
      name: `D3RO Voice ${tag}`,
      body: description,
      draft: false,
      prerelease: false,
    }),
  });
  if (!create.ok) throw new Error(`release creation failed: HTTP ${create.status} ${await create.text()}`);
  const created = await create.json();
  return created.id;
}

async function uploadReleaseAsset(releaseId, file) {
  const assetName = safeAssetName(file.name);
  // 재실행 대비: 같은 이름의 기존 asset 제거
  const list = await forgejoFetch(`${releasesApiUrl}/${releaseId}/assets`);
  if (list.ok) {
    const assets = await list.json();
    for (const asset of Array.isArray(assets) ? assets : []) {
      if (asset?.name === assetName && typeof asset.id === "number") {
        await forgejoFetch(`${releasesApiUrl}/${releaseId}/assets/${asset.id}`, { method: "DELETE" });
      }
    }
  }

  const buffer = await readFile(file.path);
  const form = new FormData();
  form.append("attachment", new Blob([buffer]), assetName);
  const response = await forgejoFetch(
    `${releasesApiUrl}/${releaseId}/assets?name=${encodeURIComponent(assetName)}`,
    { method: "POST", body: form },
  );
  if (!response.ok) {
    throw new Error(`release asset upload failed for ${assetName}: HTTP ${response.status} ${await response.text()}`);
  }
  process.stdout.write(`  attached ${assetName}\n`);
}

function forgejoFetch(url, init = {}) {
  return fetch(url, {
    ...init,
    headers: {
      ...(authorization ? { Authorization: authorization } : {}),
      ...(init.headers ?? {}),
    },
  });
}