"""Проверки генерации Caddyfile и запуска."""
from app.launcher import MARK, ensure_caddyfile, render_caddyfile


class TestRender:
    def test_domains_go_into_site_block(self):
        text = render_caddyfile("a.example.com, b.example.com", 8756, 500)
        assert "a.example.com, b.example.com {" in text

    def test_extra_spaces_and_empty_entries_are_dropped(self):
        text = render_caddyfile(" a.example.com ,, b.example.com ,", 8756, 500)
        assert "a.example.com, b.example.com {" in text

    def test_port_and_limit_come_from_settings(self):
        text = render_caddyfile("a.example.com", 9000, 250)
        assert "reverse_proxy 127.0.0.1:9000" in text
        assert "max_size 250MB" in text

    def test_real_client_address_is_forwarded(self):
        """Без этого заголовка список разрешённых адресов увидит localhost."""
        text = render_caddyfile("a.example.com", 8756, 500)
        assert "header_up X-Forwarded-For {remote_host}" in text

    def test_caddy_log_goes_to_file(self):
        """Иначе Caddy забивает консоль сообщениями про сертификаты."""
        text = render_caddyfile("a.example.com", 8756, 500)
        assert "output file logs/caddy.log" in text

    def test_generated_file_is_marked(self):
        assert render_caddyfile("a.example.com", 8756, 500).startswith(MARK)


class TestEnsure:
    def test_creates_file_when_missing(self, tmp_path):
        content = render_caddyfile("a.example.com", 8756, 500)
        written = ensure_caddyfile(tmp_path, content)
        assert written == tmp_path / "Caddyfile"
        assert written.read_text(encoding="utf-8") == content

    def test_overwrites_own_previous_version(self, tmp_path):
        ensure_caddyfile(tmp_path, render_caddyfile("old.example.com", 8756, 500))
        fresh = render_caddyfile("new.example.com", 8756, 500)
        ensure_caddyfile(tmp_path, fresh)
        assert (tmp_path / "Caddyfile").read_text(encoding="utf-8") == fresh
        assert not (tmp_path / "Caddyfile.new").exists()

    def test_keeps_hand_written_file(self, tmp_path):
        """Чужой файл не трогаем: молча стереть настройку хуже, чем оставить старую."""
        handmade = "site.example.com {\n\treverse_proxy 127.0.0.1:1234\n}\n"
        (tmp_path / "Caddyfile").write_text(handmade, encoding="utf-8")
        written = ensure_caddyfile(tmp_path, render_caddyfile("a.example.com", 8756, 500))
        assert (tmp_path / "Caddyfile").read_text(encoding="utf-8") == handmade
        assert written == tmp_path / "Caddyfile.new"
        assert MARK in written.read_text(encoding="utf-8")

    def test_no_rewrite_when_nothing_changed(self, tmp_path):
        content = render_caddyfile("a.example.com", 8756, 500)
        ensure_caddyfile(tmp_path, content)
        before = (tmp_path / "Caddyfile").stat().st_mtime_ns
        assert ensure_caddyfile(tmp_path, content) is None
        assert (tmp_path / "Caddyfile").stat().st_mtime_ns == before


class TestStartupOrder:
    def test_updater_runs_before_service(self, tmp_path, monkeypatch):
        """Обновиться нужно до запуска, иначе обновление бессмысленно."""
        import app.launcher as launcher

        calls: list[str] = []

        class FakeSettings:
            base_dir = tmp_path
            port = 8756
            max_upload_mb = 500
            https_domains = ""

        monkeypatch.setattr("app.config.load_settings", lambda: FakeSettings())
        monkeypatch.setattr("app.updater.main", lambda: calls.append("updater"))
        monkeypatch.setitem(
            __import__("sys").modules, "app.main",
            type("M", (), {"run": staticmethod(lambda: calls.append("run"))}))

        assert launcher.main([]) == 0
        assert calls == ["updater", "run"]

    def test_https_without_domains_stops_with_explanation(self, tmp_path, monkeypatch):
        """Пустые домены - это ошибка настройки, а не повод падать внутри Caddy."""
        import app.launcher as launcher

        class FakeSettings:
            base_dir = tmp_path
            port = 8756
            max_upload_mb = 500
            https_domains = "  "

        monkeypatch.setattr("app.config.load_settings", lambda: FakeSettings())
        monkeypatch.setattr("app.updater.main", lambda: None)
        assert launcher.main(["https"]) == 1