import fcntl
import subprocess
import sys
import time
import unittest

from test_cli import Cli, WF


class LockTest(Cli):
    def test_write_waits_for_lock(self):
        lock_path = self.root / ".wf" / "lock"
        lock_path.parent.mkdir(exist_ok=True)
        with open(lock_path, "w") as held:
            fcntl.flock(held, fcntl.LOCK_EX)
            p = subprocess.Popen([sys.executable, str(WF), "--project", str(self.root), "note", "t-three", "first"],
                                 stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
            time.sleep(0.5)
            self.assertIsNone(p.poll(), "write ran while the lock was held")
            self.ok("show", "t-three")          # read commands never wait
        out, err = p.communicate(timeout=10)
        self.assertEqual((p.returncode, err), (0, ""))
        self.ok("note", "t-three", "second")
        body = self.item("t-three")
        self.assertIn("first", body)
        self.assertIn("second", body)

    def test_lock_file_is_git_ignored_folder(self):
        self.ok("note", "t-three", "x")
        self.assertEqual((self.root / ".wf" / ".gitignore").read_text(), "*\n")