import os
import subprocess
import sys
import tempfile
import unittest
from pathlib import Path

SCRIPT = Path(__file__).resolve().parent.parent / "scripts" / "publish_snapshot.py"
ENV = {**os.environ, "GIT_AUTHOR_NAME": "t", "GIT_AUTHOR_EMAIL": "t@t", "GIT_COMMITTER_NAME": "t",
       "GIT_COMMITTER_EMAIL": "t@t", "GIT_CONFIG_GLOBAL": "/dev/null"}


def git(cwd, *args):
    return subprocess.run(["git", *args], cwd=cwd, capture_output=True, text=True, env=ENV, check=True).stdout


class PublishSnapshotTest(unittest.TestCase):
    def setUp(self):
        self.tmp = tempfile.TemporaryDirectory()
        t = Path(self.tmp.name)
        self.src, self.dest, self.deny = t / "tool", t / "pub", t / "deny.txt"
        self.src.mkdir()
        git(self.src, "init", "-q", "-b", "master")
        self.put({"wf.py": "print('hi')\n", "CHANGES.md": "# Changes\n\n- 2026-01-01 first.\n",
                  "wflib/a.py": "x = 1\n", "docs/d.md": "doc\n",
                  "inbox.md": "tracked inbox\n", "out/log": "x\n", "sub/__pycache__/c.pyc": "bin\n"})
        (self.src / "wf.py").chmod(0o755)
        self.commit("one")
        self.deny.write_text("# private\nSecretProj\n\n")

    def tearDown(self):
        self.tmp.cleanup()

    def put(self, files):
        for p, text in files.items():
            f = self.src / p
            f.parent.mkdir(parents=True, exist_ok=True)
            f.write_text(text)

    def commit(self, msg):
        git(self.src, "add", "-A")
        git(self.src, "commit", "-qm", msg)

    def run_it(self, *extra):
        return subprocess.run([sys.executable, str(SCRIPT), str(self.dest), "--src", str(self.src),
                               "--denylist", str(self.deny), *extra], capture_output=True, text=True, env=ENV)

    def files(self):
        return sorted(git(self.dest, "ls-files").split())

    def test_first_run_one_commit_excludes(self):
        r = self.run_it()
        self.assertEqual(r.returncode, 0, r.stderr)
        self.assertEqual(self.files(), ["CHANGES.md", "docs/d.md", "wf.py", "wflib/a.py"])
        self.assertEqual(git(self.dest, "log", "--format=%s").splitlines(), ["initial public snapshot"])
        self.assertTrue(os.access(self.dest / "wf.py", os.X_OK))
        self.assertEqual(git(self.dest, "remote"), "")

    def test_denylist_hit_content_and_path_writes_nothing(self):
        self.put({"docs/d.md": "doc\nsee secretproj here\n", "SecretProj.md": "x\n"})
        self.commit("leak")
        r = self.run_it()
        self.assertEqual(r.returncode, 1)
        self.assertIn("docs/d.md:2: SecretProj", r.stderr)
        self.assertIn("SecretProj.md: SecretProj (path)", r.stderr)
        self.assertFalse(self.dest.exists())

    def test_uncommitted_files_not_published(self):
        (self.src / "wip.py").write_text("SecretProj\n")
        r = self.run_it()
        self.assertEqual(r.returncode, 0, r.stderr)
        self.assertNotIn("wip.py", self.files())

    def test_missing_or_empty_denylist_refuses(self):
        self.deny.unlink()
        r = self.run_it()
        self.assertEqual(r.returncode, 1)
        self.assertIn("no denylist", r.stderr)
        self.deny.write_text("# only comments\n")
        self.assertEqual(self.run_it().returncode, 1)
        self.assertFalse(self.dest.exists())

    def test_second_run_commit_message_new_changes_lines(self):
        self.run_it()
        self.put({"CHANGES.md": "# Changes\n\n- 2026-01-03 third.\n- 2026-01-02 second.\n- 2026-01-01 first.\n",
                  "wflib/b.py": "y = 2\n"})
        (self.src / "docs/d.md").unlink()
        self.commit("two")
        r = self.run_it()
        self.assertEqual(r.returncode, 0, r.stderr)
        self.assertEqual(git(self.dest, "log", "-1", "--format=%B").strip(),
                         "public snapshot\n\n- 2026-01-03 third.\n- 2026-01-02 second.")
        self.assertEqual(self.files(), ["CHANGES.md", "wf.py", "wflib/a.py", "wflib/b.py"])
        self.assertEqual(len(git(self.dest, "log", "--format=%h").split()), 2)

    def test_no_change_no_commit(self):
        self.run_it()
        r = self.run_it()
        self.assertEqual(r.returncode, 0, r.stderr)
        self.assertIn("nothing new", r.stdout)
        self.assertEqual(len(git(self.dest, "log", "--format=%h").split()), 1)

    def test_ref_option_and_never_touches_remote(self):
        self.run_it()
        git(self.dest, "remote", "add", "home", "/nonexistent")
        self.put({"wflib/a.py": "x = 2\n"})
        self.commit("two")
        self.assertEqual(self.run_it("--ref", "HEAD~1").stdout.strip(), "nothing new: no commit")
        r = self.run_it()
        self.assertIn("committed", r.stdout)
        self.assertEqual(git(self.dest, "remote").split(), ["home"])

    def test_nonempty_non_git_dest_refused(self):
        self.dest.mkdir()
        (self.dest / "keep.txt").write_text("x")
        r = self.run_it()
        self.assertEqual(r.returncode, 1)
        self.assertIn("not a git repo", r.stderr)


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