import assert from "node:assert/strict";
import { execFile as callback } from "node:child_process";
import { promisify } from "node:util";
import { mkdtemp, mkdir, writeFile, readFile, rm, symlink } from "node:fs/promises";
import path from "node:path";
import os from "node:os";
import test from "node:test";
import { pathToFileURL } from "node:url";
import { materializeWorkspaceSources, workspaceSourcePin } from "../src/capability-language/source-closure.js";
import { prepareDevelopmentSources } from "../src/capability-language/development-sources.js";
import { backupWorkspaceSources, restoreWorkspaceSources } from "../src/capability-language/source-backup.js";

const exec = promisify(callback);
const lock = (resources: string) => `quixos-lock version 1 {
 quixos source { repository "https://unavailable.test/toolchain.git"; commit "${"a".repeat(40)}"; }
 ${resources}
}`;
test("exact source closure recovers through explicitly selected bundles, preserves history and rejects edits", async (context) => {
  const temporary = await mkdtemp(path.join(os.tmpdir(), "qx-closure-"));
  context.after(() => rm(temporary, { recursive: true, force: true }));
  const locations: Record<string, string> = {};
  const repository = async (name: string, resources: string) => {
    const directory = path.join(temporary, name);
    await mkdir(directory);
    const git = async (...args: string[]) => (await exec("git", args, { cwd: directory })).stdout.trim();
    await git("init");
    await writeFile(path.join(directory, "quixos.lock"), lock(""));
    await git("add", ".");
    const commit = async () => {
      await git("-c", "user.name=Test", "-c", "user.email=test@example.test", "commit", "-am", "Source");
      return await git("rev-parse", "HEAD");
    };
    const parent = await commit();
    await writeFile(path.join(directory, "quixos.lock"), lock(resources));
    await writeFile(path.join(directory, "marker"), name);
    await git("add", ".");
    const rev = await commit();
    await git("tag", `quixos-reachability/${rev}`);
    const bundle = path.join(temporary, `${name}.bundle`);
    await git("bundle", "create", bundle, `refs/tags/quixos-reachability/${rev}`);
    const source = { repository: `https://unavailable.test/${name}.git`, commit: rev };
    locations[source.repository] = pathToFileURL(bundle).href;
    return { ...source, parent };
  };
  const common = await repository("common", "");
  const dependency = `interface Common source { repository "${common.repository}"; commit "${common.commit}"; }`;
  const left = await repository("left", dependency),
    right = await repository("right", dependency);
  const root = await repository(
    "root",
    `
    package Left source { repository "${left.repository}"; commit "${left.commit}"; }
    package Right source { repository "${right.repository}"; commit "${right.commit}"; }`,
  );
  const directory = path.join(temporary, "checkout");
  const closure = await materializeWorkspaceSources({ source: root, directory, locations, concurrency: 2 });
  assert.deepEqual(
    await materializeWorkspaceSources({ source: root, directory, repositoryPrefix: "https://unavailable.test/" }),
    closure,
  );
  // Allow this root but not its dependencies: reject them before Git acquisition.
  const scopedRoot = { ...root, repository: "https://unavailable.test/selected/root.git" };
  await assert.rejects(
    materializeWorkspaceSources({
      source: scopedRoot,
      directory: path.join(temporary, "scoped"),
      locations: { ...locations, [scopedRoot.repository]: locations[root.repository] },
      repositoryPrefix: "https://unavailable.test/selected/",
    }),
    /outside the acquisition boundary/,
  );
  await assert.rejects(
    materializeWorkspaceSources({ source: root, directory, repositoryPrefix: "https://unavailable.test/root.git/" }),
    /outside the acquisition boundary/,
  );
  assert.equal(closure.resources.length, 4, "diamond dependency is materialized once");
  assert.deepEqual(JSON.parse(await readFile(path.join(directory, "sources.json"), "utf8")), closure);
  const rootEntry = closure.resources.find((entry) => entry.kind === "workspace")!;
  const rootDirectory = path.join(directory, rootEntry.directory);
  const rootLock = path.join(rootDirectory, "quixos.lock");
  const rootBody = await readFile(rootLock, "utf8");
  const outsideLock = path.join(temporary, "outside.lock");
  await writeFile(outsideLock, rootBody);
  // Exercise the shared loader directly: committed root symlinks must not let
  // privileged source inspection read outside the acquired repository.
  const { loadQuixosLock } = await import("../src/resource-lock/index.js");
  const linkedLock = path.join(temporary, "linked.lock");
  await symlink(outsideLock, linkedLock);
  await assert.rejects(loadQuixosLock(linkedLock), /root locks must be ordinary/);
  const backup = path.join(temporary, "retained");
  const manifest = await backupWorkspaceSources({ source: root, directory, output: backup });
  assert.equal(manifest.repositories.length, 4);
  const restored = await restoreWorkspaceSources({ backup, directory: path.join(temporary, "restored") });
  assert.deepEqual(restored, closure, "Source-only recovery retains canonical identity without an available forge");
  await assert.rejects(backupWorkspaceSources({ source: root, directory, output: backup }), /must not exist/);
  const missing = {
    ...manifest,
    repositories: manifest.repositories.filter((entry) => entry.repository !== common.repository),
  };
  await writeFile(path.join(backup, "backup.json"), JSON.stringify(missing));
  await assert.rejects(
    restoreWorkspaceSources({ backup, directory: path.join(temporary, "incomplete") }),
    /omits required repository/,
  );
  await writeFile(path.join(backup, "backup.json"), JSON.stringify(manifest));
  await writeFile(path.join(backup, manifest.repositories[0].bundle), "damaged backup");
  await assert.rejects(
    restoreWorkspaceSources({ backup, directory: path.join(temporary, "damaged") }),
    /integrity mismatch/,
  );
  assert.equal((await exec("git", ["rev-parse", "HEAD^"], { cwd: rootDirectory })).stdout.trim(), root.parent);
  assert.equal(
    (await exec("git", ["remote", "get-url", "origin"], { cwd: rootDirectory })).stdout.trim(),
    root.repository,
  );
  // Cached recovery does not need the primary or the backup.
  assert.deepEqual(await materializeWorkspaceSources({ source: root, directory }), closure);
  const pinFile = path.join(temporary, "source.json");
  await writeFile(pinFile, JSON.stringify(root));
  const cli = path.resolve(import.meta.dirname, "../src/capability-language/tool-cli.js");
  const command = await exec(process.execPath, [cli, "source-checkout", pinFile, "--dir", directory]);
  assert.deepEqual(JSON.parse(command.stdout), closure, "Protocol CLI preserves exact cached source identity");
  const scoped = await exec(process.execPath, [
    cli,
    "source-checkout",
    pinFile,
    "--dir",
    directory,
    "--repository-prefix",
    "https://unavailable.test/",
  ]);
  assert.deepEqual(JSON.parse(scoped.stdout), closure);
  const cliBackup = path.join(temporary, "cli-backup");
  const backupCommand = await exec(process.execPath, [
    cli,
    "source-backup",
    pinFile,
    "--dir",
    directory,
    "--output",
    cliBackup,
  ]);
  assert.equal(JSON.parse(backupCommand.stdout).repositories.length, 4);
  const restoreCommand = await exec(process.execPath, [
    cli,
    "source-restore",
    cliBackup,
    "--dir",
    path.join(temporary, "cli-restore"),
  ]);
  assert.deepEqual(JSON.parse(restoreCommand.stdout), closure);
  const developmentCommand = await exec(process.execPath, [
    cli,
    "source-develop",
    pinFile,
    "--dir",
    path.join(temporary, "cli-developer"),
    "--cache",
    directory,
  ]);
  const developmentResult = JSON.parse(developmentCommand.stdout);
  assert.equal(developmentResult.repositories, 4);
  assert.deepEqual(developmentResult.source, closure.root);
  const a = await prepareDevelopmentSources({
    source: root,
    cacheDirectory: directory,
    directory: path.join(temporary, "a"),
  });
  const b = await prepareDevelopmentSources({
    source: root,
    cacheDirectory: directory,
    directory: path.join(temporary, "b"),
  });
  assert.notEqual(a.workspaceId, b.workspaceId);
  const assigned = "f8f2f8a3-328c-45a2-847a-31869ad28ce7";
  const c = await prepareDevelopmentSources({
    source: root,
    cacheDirectory: directory,
    directory: path.join(temporary, "assigned"),
    workspaceId: assigned,
  });
  assert.equal(c.workspaceId, assigned);
  assert.equal(
    JSON.parse(await readFile(path.join(c.directory, ".quixos/resource-graph.json"), "utf8")).workspaceId,
    assigned,
  );
  await assert.rejects(
    prepareDevelopmentSources({
      source: root,
      cacheDirectory: directory,
      directory: path.join(temporary, "invalid"),
      workspaceId: "not-a-workspace",
    }),
    /Workspace UUID/,
  );
  const aRoot = path.join(a.directory, "root"),
    bRoot = path.join(b.directory, "root");
  assert.equal((await exec("git", ["remote", "get-url", "origin"], { cwd: aRoot })).stdout.trim(), root.repository);
  assert.equal(
    await readFile(path.join(aRoot, "quixos.lock"), "utf8"),
    await readFile(path.join(rootDirectory, "quixos.lock"), "utf8"),
  );
  await exec("git", ["cat-file", "-e", root.parent], { cwd: aRoot });
  await writeFile(path.join(aRoot, "marker"), "Independent developer change");
  assert.equal(await readFile(path.join(bRoot, "marker"), "utf8"), "root");
  assert.equal(await readFile(path.join(rootDirectory, "marker"), "utf8"), "root");
  await assert.rejects(
    prepareDevelopmentSources({ source: root, cacheDirectory: directory, directory: a.directory }),
    /never overwritten/,
  );
  await writeFile(path.join(rootDirectory, "marker"), "edited");
  await assert.rejects(materializeWorkspaceSources({ source: root, directory, locations }), /modified/);
  await assert.rejects(
    materializeWorkspaceSources({
      source: root,
      directory: path.join(temporary, "bounded"),
      locations,
      maxRepositories: 2,
    }),
    /repository limit/,
  );
  await assert.rejects(
    materializeWorkspaceSources({
      source: root,
      directory,
      locations: { [root.repository]: "https://secret:password@example.test/root.git" },
    }),
    /transport substitution/,
  );
});
test("Workspace pins reject floating revisions and embedded credentials", () => {
  assert.throws(() => workspaceSourcePin({ repository: "https://example.test/root.git", commit: "main" }));
  assert.throws(() =>
    workspaceSourcePin({ repository: "https://user:password@example.test/root.git", commit: "a".repeat(40) }),
  );
});