import fs from "node:fs";
import path from "node:path";

// A FIXTURE PUBLISH for the /source/ page's History block (release 15 slice
// SG). The page reads the directory E2E_SOURCE_PUBLIC_DIR names instead of
// public/ while it holds a manifest (app/lib/source.ts sourcePublicDir,
// honoured only outside a production build), so a spec can show the page with
// a history and without one, whatever this checkout has published. The spec
// writes it, and removes it after each test: with it gone, the page — and
// every other spec — reads public/ again. playwright.config.ts clears it
// before the server starts, in case a killed run left one.
//
// Only the files the loader requires: the manifest, the mirror's info/refs,
// the tarball, and — with a history — the log page. Nothing here is served:
// the dev server serves public/, so the History links are checked by their
// hrefs, and the real pages by source.spec.ts.

export const FIXTURE_SOURCE_NAME = ".e2e-source";

export const FIXTURE_HISTORY = {
  href: "/source/git/log.html",
  commits: 1234,
  total: 1234,
  head: "c".repeat(40),
  files: 1240,
  bytes: 1_000_000,
  sha256: "d".repeat(64),
  tool: "stagit (sha256 0123456789ab)",
};

export const FIXTURE_MIRROR_HEAD = "c".repeat(40);

// `total` over the history's `commits` is a history past the cap: the page
// says "the latest N of M".
export function writeFixtureSource(dir: string, o: { history: boolean; total?: number }): void {
  clearFixtureSource(dir);
  fs.mkdirSync(path.join(dir, "source", "archilyzer.git", "info"), { recursive: true });
  fs.mkdirSync(path.join(dir, "downloads"), { recursive: true });
  fs.writeFileSync(path.join(dir, "source", "archilyzer.git", "info", "refs"), `${FIXTURE_MIRROR_HEAD}\trefs/heads/main\n`);
  fs.writeFileSync(path.join(dir, "downloads", "archilyzer-source.tar.gz"), "fixture");
  if (o.history) {
    fs.mkdirSync(path.join(dir, "source", "git"), { recursive: true });
    fs.writeFileSync(path.join(dir, "source", "git", "log.html"), "<html></html>\n");
  }
  const manifest = {
    version: 1,
    generatedAt: "2026-09-30T12:00:00.000Z",
    branch: "main",
    sourceCommit: "b".repeat(40),
    mirrorHead: FIXTURE_MIRROR_HEAD,
    subject: "a fixture publish",
    files: 10,
    bytes: 100,
    mirror: { files: 9, bytes: 80, packs: 1 },
    tree: { files: 5, dirs: 2, bytes: 20 },
    tarball: { href: "/downloads/archilyzer-source.tar.gz", bytes: 7, sha256: "e".repeat(64) },
    cloneUrl: "https://archilyzer.pages.dev/source/archilyzer.git",
    treeHref: "/source/tree/",
    audit: { objects: 3, commits: 1, gitleaks: "skipped" },
    tools: { git: "2.55.0", filterRepo: "fixture" },
    ...(o.history ? { history: { ...FIXTURE_HISTORY, total: o.total ?? FIXTURE_HISTORY.total } } : {}),
  };
  // Written last, as the publish writes it: the page reads the fixture only
  // once a manifest is there.
  fs.writeFileSync(path.join(dir, "source", "manifest.json"), JSON.stringify(manifest, null, 2));
}

export function clearFixtureSource(dir: string): void {
  fs.rmSync(dir, { recursive: true, force: true });
}