/**
 * @file Tests for server/lib/commit-message.js against a real git repo and a
 * fake `claude` script: only staged, in-lane, non-secret changes reach the
 * model; its argv keeps tools, hooks and persistence off; its answer is
 * cleaned; and every failure is a coded error.
 * @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 { execFileSync } = require("node:child_process");

const { suggestCommitMessage, buildInput } = require("../lib/commit-message");

const ROOT = fs.mkdtempSync(path.join(os.tmpdir(), "agenthub-commitmsg-"));
const REPO = path.join(ROOT, "repo");
const SUB = path.join(REPO, "sub");
const ARGS = path.join(ROOT, "args.txt");
const STDIN = path.join(ROOT, "stdin.txt");

const g = (...args) => {
  const env = { ...process.env };
  delete env.GIT_DIR;
  delete env.GIT_INDEX_FILE;
  execFileSync("git", ["-c", "user.email=t@h", "-c", "user.name=t", ...args], { cwd: REPO, env });
};
const write = (file, body) => {
  fs.mkdirSync(path.dirname(path.join(REPO, file)), { recursive: true });
  fs.writeFileSync(path.join(REPO, file), body);
};
/** A fake claude: records argv and stdin, prints `reply`, exits `code`. */
function fakeClaude(reply, code = 0) {
  const bin = path.join(ROOT, `claude-${Math.random().toString(36).slice(2)}`);
  fs.writeFileSync(
    bin,
    `#!/bin/sh\nprintf '%s\\n' "$@" > '${ARGS}'\ncat > '${STDIN}'\nprintf '${reply}'\nexit ${code}\n`,
    { mode: 0o755 }
  );
  return bin;
}

before(() => {
  fs.mkdirSync(REPO);
  g("init", "-q", "-b", "main");
  write("a.txt", "one\n");
  g("add", "-A");
  g("commit", "-q", "-m", "feat: seed");
});
after(() => fs.rmSync(ROOT, { recursive: true, force: true }));

describe("commit-message", () => {
  it("refuses with ENOSTAGED when nothing is staged", async () => {
    write("a.txt", "one\nunstaged\n");
    await assert.rejects(buildInput(REPO), { code: "ENOSTAGED" });
  });

  it("sends only staged, non-secret changes and keeps tools/hooks/persistence off", async () => {
    write("b.txt", "staged line\n");
    write(".claude/settings.local.json", '{"env":{"KEY":"sk-secret"}}\n');
    g("add", "-f", "b.txt", ".claude/settings.local.json");
    const msg = await suggestCommitMessage(REPO, { bin: fakeClaude("```\\nfeat: add b\\n```") });
    assert.equal(msg, "feat: add b");
    const stdin = fs.readFileSync(STDIN, "utf8");
    assert.match(stdin, /feat: seed/);
    assert.match(stdin, /staged line/);
    assert.doesNotMatch(stdin, /unstaged|sk-secret|settings\.local/);
    const argv = fs.readFileSync(ARGS, "utf8").split("\n");
    for (const flag of ["-p", "--safe-mode", "--no-session-persistence", "--tools"]) {
      assert.ok(argv.includes(flag), flag);
    }
    assert.equal(argv[argv.indexOf("--tools") + 1], "");
  });

  it("scopes a subdirectory lane to its own staged files", async () => {
    write("sub/c.txt", "inside\n");
    g("add", "sub/c.txt");
    const input = await buildInput(SUB);
    assert.match(input, /inside/);
    assert.doesNotMatch(input, /staged line/);
  });

  it("with paths, reads exactly those files' working-tree changes, untracked included", async () => {
    write("a.txt", "one\nticked edit\n");
    write("new.txt", "brand new\n");
    write("other.txt", "not ticked\n");
    write(".claude/settings.local.json", '{"env":{"KEY":"sk-ticked"}}\n');
    const input = await buildInput(REPO, ["a.txt", "new.txt", ".claude/settings.local.json"]);
    assert.match(input, /ticked edit/);
    assert.match(input, /brand new/);
    assert.doesNotMatch(input, /not ticked|staged line|sk-ticked|settings\.local/);
    await assert.rejects(buildInput(REPO, ["nope.txt"]), { code: "EBADPATH" });
    await assert.rejects(buildInput(REPO, []), { code: "ENOSTAGED" });
  });

  it("reports a failing or silent CLI as EAI", async () => {
    await assert.rejects(suggestCommitMessage(REPO, { bin: fakeClaude("boom", 1) }), {
      code: "EAI",
    });
    await assert.rejects(suggestCommitMessage(REPO, { bin: fakeClaude("") }), { code: "EAI" });
  });
});