"""run_parallel.py 单测（CI 第二阶段覆盖率：基线 0%）。

不跑真实 client.py/codex：只断言 main() 拼出的子进程命令
（可执行文件、client.py 路径、cwd 解析、sandbox 默认值、
approval-policy、codex-home 透传）与成功计数/返回码——
命令构造与汇总正是本文件的全部逻辑。
"""

import io
import json
import os
import sys
import tempfile
import unittest
from contextlib import redirect_stdout
from unittest import mock
import run_parallel as rp_mod


class FakePopen:
    seen = []

    def __init__(self, cmd):
        self.cmd = cmd
        FakePopen.seen.append(cmd)
        self._rc = 0

    def wait(self):
        return self._rc


class RunParallelTest(unittest.TestCase):
    def _run(self, jobs, extra_args):
        FakePopen.seen = []
        with tempfile.TemporaryDirectory() as tmp:
            jobs_path = os.path.join(tmp, "jobs.json")
            with open(jobs_path, "w", encoding="utf-8") as f:
                json.dump(jobs, f)
            argv = ["run_parallel.py", "--jobs", jobs_path] + extra_args
            with mock.patch.object(rp_mod.subprocess, "Popen", FakePopen), \
                    mock.patch.object(sys, "argv", argv):
                out = io.StringIO()
                with redirect_stdout(out):
                    rc = rp_mod.main()
        return rc, list(FakePopen.seen), out.getvalue()

    def test_commands_and_all_success(self):
        jobs = [{"cwd": "job-a", "prompt": "review a"},
                {"cwd": "/tmp/abs-b", "prompt": "review b",
                 "sandbox": "workspace-write"}]
        rc, seen, out = self._run(jobs, ["--codex-home", "/tmp/ch"])
        self.assertEqual(rc, 0)
        self.assertEqual(len(seen), 2)
        client = os.path.join(rp_mod.HERE, "client.py")
        self.assertEqual(seen[0], [sys.executable, client,
                                   "--prompt", "review a",
                                   "--cwd", os.path.join(rp_mod.HERE, "job-a"),
                                   "--sandbox", "read-only",
                                   "--approval-policy", "never",
                                   "--codex-home", "/tmp/ch"])
        self.assertEqual(seen[1][5], "/tmp/abs-b")
        self.assertEqual(seen[1][7], "workspace-write")
        self.assertIn("2/2", out)

    def test_one_failure_returns_1(self):
        class FailingPopen(FakePopen):
            def __init__(self, cmd):
                super().__init__(cmd)
                self._idx = len(FakePopen.seen)

            def wait(self):
                return 1 if self._idx == 2 else 0

        jobs = [{"cwd": "/tmp/a", "prompt": "x"},
                {"cwd": "/tmp/b", "prompt": "y"}]
        FakePopen.seen = []
        with tempfile.TemporaryDirectory() as tmp:
            jobs_path = os.path.join(tmp, "jobs.json")
            with open(jobs_path, "w", encoding="utf-8") as f:
                json.dump(jobs, f)
            with mock.patch.object(rp_mod.subprocess, "Popen",
                                   FailingPopen), \
                    mock.patch.object(sys, "argv",
                                      ["run_parallel.py", "--jobs",
                                       jobs_path]):
                out = io.StringIO()
                with redirect_stdout(out):
                    rc = rp_mod.main()
        self.assertEqual(rc, 1)
        self.assertIn("1/2", out.getvalue())

    def test_empty_jobs_returns_0(self):
        rc, seen, out = self._run([], [])
        self.assertEqual(rc, 0)
        self.assertEqual(seen, [])
        self.assertIn("0/0", out)


if __name__ == "__main__":
    unittest.main()