/**
 * @file Tests for Add workspace → Clone and a user's own git identity:
 * `POST /api/lanes/clone` (URL allowlist, name/parent checks, a clone that
 * becomes a workspace, the SSH key persisted into the clone, 409
 * ECREDENTIALS for a remote wanting a login), `/api/me/git` (key made once,
 * only the public half returned, 0600 on disk), and the member (S3) path of
 * `server/lib/git-identity.js` with run-as and git stubbed — what reaches
 * git's argv, and that a login typed without "remember" leaves the member's
 * store as it was.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it, before, after } = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");
const http = require("node:http");
const { execFileSync } = require("node:child_process");

const ROOT = fs.mkdtempSync(path.join(os.tmpdir(), "git-clone-route-"));
process.env.DASHBOARD_DB_PATH = path.join(ROOT, "t.db");
process.env.CLAUDE_HOME = path.join(ROOT, ".claude");
process.env.DASHBOARD_REMOTE_SYNC_MS = "0";
process.env.DASHBOARD_LIVENESS_PROBE = "0";
process.env.GIT_CONFIG_NOSYSTEM = "1";
process.env.HOME = ROOT;

const { createApp } = require("../index");
const identity = require("../lib/git-identity");

let app;
let remote;
let base;
const WORK = path.join(ROOT, "work");

function request(method, p, body, headers = {}) {
  return fetch(`${base}${p}`, {
    method,
    headers: { "Content-Type": "application/json", ...headers },
    body: body === undefined ? undefined : JSON.stringify(body),
  }).then(async (r) => ({ status: r.status, body: await r.json().catch(() => null) }));
}

before(async () => {
  // A local bare repo stands in for the forge: the test's own ~/.gitconfig
  // rewrites the https and scp-like URLs to it (git reads HOME's config).
  const src = path.join(ROOT, "src");
  const bare = path.join(ROOT, "bare.git");
  execFileSync("git", ["init", "-q", "-b", "main", src]);
  fs.writeFileSync(path.join(src, "README.md"), "hi\n");
  execFileSync("git", ["-C", src, "add", "."]);
  execFileSync("git", [
    "-C",
    src,
    "-c",
    "user.name=t",
    "-c",
    "user.email=t@t",
    "commit",
    "-qm",
    "init",
  ]);
  execFileSync("git", ["clone", "-q", "--bare", src, bare]);

  remote = http.createServer((_req, res) => {
    res.writeHead(401, { "WWW-Authenticate": 'Basic realm="t"' });
    res.end();
  });
  await new Promise((r) => remote.listen(0, "127.0.0.1", r));
  const authHost = `127.0.0.1:${remote.address().port}`;
  fs.writeFileSync(
    path.join(ROOT, ".gitconfig"),
    [
      `[url "file://${bare}"]`,
      "\tinsteadOf = https://forge.test/o/r.git",
      "\tinsteadOf = git@forge.test:o/r.git",
      `[url "file://${path.join(ROOT, "missing.git")}"]`,
      "\tinsteadOf = git@forge.test:o/missing.git",
      `[url "http://${authHost}/"]`,
      "\tinsteadOf = https://private.test/",
      "",
    ].join("\n")
  );
  fs.mkdirSync(WORK);

  app = http.createServer(createApp());
  await new Promise((r) => app.listen(0, "127.0.0.1", r));
  base = `http://127.0.0.1:${app.address().port}`;
});
after(async () => {
  await new Promise((r) => app.close(r));
  await new Promise((r) => remote.close(r));
});

describe("POST /api/lanes/clone", () => {
  it("refuses a URL outside the allowlist", async () => {
    for (const url of [
      "file:///etc",
      "http://h/x",
      "https://u:p@h/x",
      "-oProxyCommand=x",
      "ext::sh",
    ]) {
      const r = await request("POST", "/api/lanes/clone", { url, parent: WORK });
      assert.equal(r.status, 400, url);
      assert.equal(r.body.error.code, "EBADURL", url);
    }
  });

  it("refuses a name with a separator and a missing parent", async () => {
    const bad = await request("POST", "/api/lanes/clone", {
      url: "https://forge.test/o/r.git",
      parent: WORK,
      name: "a/b",
    });
    assert.equal(bad.body.error.code, "EBADNAME");
    const gone = await request("POST", "/api/lanes/clone", {
      url: "https://forge.test/o/r.git",
      parent: path.join(ROOT, "nope"),
    });
    assert.equal(gone.body.error.code, "ENOTFOUND");
  });

  it("clones over https into <parent>/<repo> and makes it a workspace", async () => {
    const r = await request("POST", "/api/lanes/clone", {
      url: "https://forge.test/o/r.git",
      parent: WORK,
      tool: "claude",
    });
    assert.equal(r.status, 201, JSON.stringify(r.body));
    assert.equal(r.body.lane.title, "r");
    assert.equal(fs.readFileSync(path.join(WORK, "r", "README.md"), "utf8"), "hi\n");
    const again = await request("POST", "/api/lanes/clone", {
      url: "https://forge.test/o/r.git",
      parent: WORK,
    });
    assert.equal(again.status, 409);
    assert.equal(again.body.error.code, "EEXISTS");
  });

  it("clones over ssh with the user's key, kept in the clone's config", async () => {
    const made = await request("POST", "/api/me/git/ssh-key", {});
    assert.equal(made.status, 201);
    const r = await request("POST", "/api/lanes/clone", {
      url: "git@forge.test:o/r.git",
      parent: WORK,
      name: "via-ssh",
    });
    assert.equal(r.status, 201, JSON.stringify(r.body));
    const cmd = execFileSync(
      "git",
      ["-C", path.join(WORK, "via-ssh"), "config", "core.sshCommand"],
      {
        encoding: "utf8",
      }
    );
    assert.match(cmd, /agenthub-ssh\/id_ed25519/);
    assert.match(cmd, /IdentitiesOnly=yes/);
  });

  it("answers 409 ECREDENTIALS with the host when the remote wants a login", async () => {
    const r = await request("POST", "/api/lanes/clone", {
      url: "https://private.test/o/r.git",
      parent: WORK,
      name: "private",
    });
    assert.equal(r.status, 409, JSON.stringify(r.body));
    assert.equal(r.body.error.code, "ECREDENTIALS");
    assert.equal(r.body.error.auth.host, "private.test");
    assert.ok(!fs.existsSync(path.join(WORK, "private")));
  });

  it("says a missing repository is missing, not that the SSH key was refused", async () => {
    const r = await request("POST", "/api/lanes/clone", {
      url: "git@forge.test:o/missing.git",
      parent: WORK,
      name: "missing",
    });
    assert.equal(r.status, 409, JSON.stringify(r.body));
    assert.equal(r.body.error.code, "ENOREPO");
  });

  it("refuses a cross-origin request", async () => {
    const r = await request(
      "POST",
      "/api/lanes/clone",
      { url: "https://forge.test/o/r.git", parent: WORK, name: "x" },
      { Origin: "https://evil.example" }
    );
    assert.equal(r.status, 403);
  });
});

describe("POST /api/lanes/:id/sources/clone", () => {
  it("clones beside the workspace folder and adds it as an extra folder", async () => {
    const home = path.join(WORK, "app");
    fs.mkdirSync(home);
    const made = await request("POST", "/api/lanes/ensure", { cwd: home });
    assert.ok([200, 201].includes(made.status), JSON.stringify(made.body));
    const id = made.body.lane.id;

    const r = await request("POST", `/api/lanes/${id}/sources/clone`, {
      url: "https://forge.test/o/r.git",
      name: "lib",
      // Ignored: the clone always lands beside the workspace folder.
      parent: path.join(ROOT, "elsewhere"),
    });
    assert.equal(r.status, 201, JSON.stringify(r.body));
    const target = path.join(WORK, "lib");
    assert.equal(fs.realpathSync(r.body.path), fs.realpathSync(target));
    assert.equal(fs.readFileSync(path.join(target, "README.md"), "utf8"), "hi\n");
    const folders = r.body.sources.filter((s) => s.kind === "folder");
    assert.deepEqual(
      folders.map((f) => fs.realpathSync(f.path)),
      [fs.realpathSync(target)]
    );

    const again = await request("POST", `/api/lanes/${id}/sources/clone`, {
      url: "https://forge.test/o/r.git",
      name: "lib",
    });
    assert.equal(again.status, 409);
    assert.equal(again.body.error.code, "EEXISTS");

    const login = await request("POST", `/api/lanes/${id}/sources/clone`, {
      url: "https://private.test/o/r.git",
      name: "private-lib",
    });
    assert.equal(login.status, 409);
    assert.equal(login.body.error.code, "ECREDENTIALS");
    assert.equal(login.body.error.auth.host, "private.test");
  });

  it("answers 404 for a workspace that does not exist", async () => {
    const r = await request("POST", "/api/lanes/99999/sources/clone", {
      url: "https://forge.test/o/r.git",
    });
    assert.equal(r.status, 404);
  });
});

describe("/api/me/git", () => {
  it("makes a key once, returns only its public half, and deletes it", async () => {
    await request("DELETE", "/api/me/git/ssh-key");
    const made = await request("POST", "/api/me/git/ssh-key", {});
    assert.equal(made.status, 201);
    assert.match(made.body.ssh.publicKey, /^ssh-ed25519 /);
    assert.match(made.body.ssh.fingerprint, /^SHA256:/);
    assert.ok(!JSON.stringify(made.body).includes("PRIVATE"));
    const key = path.join(ROOT, ".claude", "agenthub-ssh", "id_ed25519");
    assert.equal(fs.statSync(key).mode & 0o777, 0o600);
    // ssh-keygen reads it back to the same public key.
    const pub = execFileSync("ssh-keygen", ["-y", "-f", key], { encoding: "utf8" }).trim();
    assert.equal(
      pub.split(" ").slice(0, 2).join(" "),
      made.body.ssh.publicKey.split(" ").slice(0, 2).join(" ")
    );

    const twice = await request("POST", "/api/me/git/ssh-key", {});
    assert.equal(twice.status, 409);
    const replaced = await request("POST", "/api/me/git/ssh-key", { replace: true });
    assert.equal(replaced.status, 201);
    assert.notEqual(replaced.body.ssh.publicKey, made.body.ssh.publicKey);

    const del = await request("DELETE", "/api/me/git/ssh-key");
    assert.equal(del.body.ssh, null);
  });

  it("makes an RSA 4096 key for hosts that refuse ed25519 (AWS CodeCommit), one key at a time", async () => {
    await request("POST", "/api/me/git/ssh-key", {});
    const rsa = await request("POST", "/api/me/git/ssh-key", { replace: true, type: "rsa" });
    assert.equal(rsa.status, 201, JSON.stringify(rsa.body));
    assert.equal(rsa.body.ssh.type, "rsa");
    assert.match(rsa.body.ssh.publicKey, /^ssh-rsa AAAAB3NzaC1yc2E/);
    assert.ok(!JSON.stringify(rsa.body).includes("PRIVATE"));
    const dir = path.join(ROOT, ".claude", "agenthub-ssh");
    assert.equal(fs.statSync(path.join(dir, "id_rsa")).mode & 0o777, 0o600);
    assert.ok(!fs.existsSync(path.join(dir, "id_ed25519")), "the ed25519 key was replaced");
    const bits = execFileSync("ssh-keygen", ["-lf", path.join(dir, "id_rsa.pub")], {
      encoding: "utf8",
    });
    assert.match(bits, /^4096 .*\(RSA\)/);
    assert.equal(
      (await request("POST", "/api/me/git/ssh-key", { replace: true, type: "dsa" })).status,
      201
    );
    // An unknown type falls back to the default (the route only passes rsa through).
    assert.equal((await request("GET", "/api/me/git")).body.ssh.type, "ed25519");
    await request("DELETE", "/api/me/git/ssh-key");
  });

  it("reads and sets the commit author, refusing a bad one", async () => {
    const r0 = await request("GET", "/api/me/git");
    assert.deepEqual(r0.body.author, { name: null, email: null });
    const bad = await request("PUT", "/api/me/git/author", { name: "a\nb", email: "x@y" });
    assert.equal(bad.status, 400);
    assert.equal(bad.body.error.code, "EBADAUTHOR");
    const ok = await request("PUT", "/api/me/git/author", { name: "Vi", email: "vi@example.com" });
    assert.equal(ok.status, 200);
    assert.deepEqual(ok.body.author, { name: "Vi", email: "vi@example.com" });
    assert.match(fs.readFileSync(path.join(ROOT, ".gitconfig"), "utf8"), /email = vi@example.com/);
  });

  it("saves an https login without ever returning the token", async () => {
    const r = await request("POST", "/api/me/git/https", {
      host: "git.example.test",
      username: "vi",
      password: "tok-secret",
    });
    assert.equal(r.status, 200);
    assert.equal(r.body.account, "host");
    assert.equal(r.body.https[0].host, "git.example.test");
    assert.ok(!JSON.stringify(r.body).includes("tok-secret"));
    const del = await request("DELETE", "/api/me/git/https/git.example.test");
    assert.deepEqual(del.body.https, []);
  });
});

describe("git-identity, member account (S3, stubbed)", () => {
  const runAs = require("../lib/run-as");
  const worktree = require("../lib/worktree");
  const HOME = path.join(ROOT, "users", "an");
  // This process's own uid: the key is checked to be the member's own file.
  const acct = { name: "an", login: "ah-an", home: HOME, uid: process.getuid() };
  const saved = {};
  let calls = [];

  before(() => {
    fs.mkdirSync(path.join(HOME, "proj"), { recursive: true });
    for (const k of ["accountForPath", "readFileSafe", "mkdirAs", "writeAs", "removeAs"]) {
      saved[k] = runAs[k];
    }
    saved.git = worktree.git;
    const inHome = (p) => path.resolve(p).startsWith(HOME);
    runAs.accountForPath = (p) => (inHome(p) ? acct : null);
    runAs.readFileSafe = (f, enc) => fs.readFileSync(f, enc);
    runAs.mkdirAs = (_a, d) => fs.mkdirSync(d, { recursive: true });
    runAs.writeAs = (_a, f, mode, content) => {
      if (mode === "remove") return fs.rmSync(f, { recursive: true, force: true });
      fs.writeFileSync(f, content, { mode: mode === "private" ? 0o600 : 0o644 });
    };
    runAs.removeAs = (_a, f) => fs.rmSync(f, { recursive: true, force: true });
    worktree.git = async (cwd, args) => {
      calls.push({ cwd, args });
      return { stdout: "", stderr: "" };
    };
  });
  after(() => {
    for (const [k, v] of Object.entries(saved)) {
      if (k === "git") worktree.git = v;
      else runAs[k] = v;
    }
  });

  it("keeps the key and the logins in the member's own home", async () => {
    const account = identity.accountForDir(path.join(HOME, "proj"));
    assert.equal(account.kind, "member");
    await identity.generateSshKey(account);
    const key = path.join(HOME, ".config", "agenthub", "ssh", "id_ed25519");
    assert.equal(fs.statSync(key).mode & 0o777, 0o600);
    identity.saveHttps(account, { host: "gitlab.test", username: "an", password: "p@ss/1" });
    const store = path.join(HOME, ".config", "agenthub", "git-credentials");
    assert.equal(fs.statSync(store).mode & 0o777, 0o600);
    assert.equal(fs.readFileSync(store, "utf8"), "https://an:p%40ss%2F1@gitlab.test\n");
    assert.deepEqual(identity.listHttps(account), [
      { protocol: "https", host: "gitlab.test", username: "an", hasToken: true },
    ]);
  });

  it("clones over ssh with the member's key and persists it", async () => {
    calls = [];
    await identity.cloneRepo({
      url: "git@gh.test:o/r.git",
      parent: path.join(HOME, "proj"),
      name: "r",
    });
    const { args } = calls[0];
    const i = args.indexOf("clone");
    assert.match(
      args[i - 1],
      /^core\.sshCommand=ssh -i '.*\/\.config\/agenthub\/ssh\/id_ed25519'.*BatchMode=yes/
    );
    assert.match(args[i + 2], /^core\.sshCommand=ssh -i /);
    assert.deepEqual(args.slice(-3), ["--", "git@gh.test:o/r.git", "r"]);
  });

  it("gives a member's fetch their own store, and puts a typed login in it only for the call", () => {
    const account = identity.accountForDir(path.join(HOME, "proj"));
    const store = path.join(HOME, ".config", "agenthub", "git-credentials");
    const before = fs.readFileSync(store, "utf8");
    const hosts = [{ protocol: "https", host: "gitlab.test" }];
    const saved = identity.memberHttpsConfig(account, hosts, null);
    assert.match(saved.args.join(" "), /credential\.helper=store --file=/);
    assert.deepEqual(saved.stored("https", "gitlab.test"), { username: "an" });
    assert.throws(
      () =>
        identity.memberHttpsConfig(account, hosts, {
          host: "evil.test",
          username: "u",
          password: "p",
        }),
      { code: "EBADHOST" }
    );
    const typed = identity.memberHttpsConfig(account, hosts, {
      host: "gitlab.test",
      username: "an",
      password: "once-only",
    });
    assert.ok(!typed.args.join(" ").includes("once-only"));
    assert.match(fs.readFileSync(store, "utf8"), /once-only/);
    typed.finish(true); // worked, but not remembered
    assert.equal(fs.readFileSync(store, "utf8"), before);
  });

  it("refuses to rewrite a store it cannot read rather than dropping every login", () => {
    const account = identity.accountForDir(path.join(HOME, "proj"));
    const read = runAs.readFileSafe;
    runAs.readFileSafe = () => {
      throw Object.assign(new Error("denied"), { code: "EACCES" });
    };
    try {
      assert.throws(
        () => identity.saveHttps(account, { host: "x.test", username: "u", password: "p" }),
        {
          code: "ESTOREUNREADABLE",
        }
      );
    } finally {
      runAs.readFileSafe = read;
    }
  });

  it("uses a typed https login through the member's store, never argv, and forgets it", async () => {
    calls = [];
    const store = path.join(HOME, ".config", "agenthub", "git-credentials");
    const before = fs.readFileSync(store, "utf8");
    worktree.git = async (cwd, args) => {
      calls.push({ cwd, args, during: fs.readFileSync(store, "utf8") });
      return { stdout: "", stderr: "" };
    };
    await identity.cloneRepo({
      url: "https://new.test/o/r.git",
      parent: path.join(HOME, "proj"),
      name: "r2",
      once: { username: "an", password: "typed-secret", remember: false },
    });
    const { args, during } = calls[0];
    assert.ok(!args.join(" ").includes("typed-secret"));
    assert.ok(args.some((a) => /^credential\.helper=store --file=/.test(a)));
    assert.match(during, /typed-secret@new\.test/);
    // Not remembered: the store is back as it was, and nothing is persisted.
    assert.equal(fs.readFileSync(store, "utf8"), before);
    assert.equal(args.slice(args.indexOf("clone") + 1).filter((a) => a === "-c").length, 0);
  });
});