from tamq.control import PaneDisplay
from tamq.service import Service
from tamq.store import Store


class FakeControl:
    instances = []

    def __init__(self, session):
        self.session = session
        self.injected = []
        self.submitted = []
        self.__class__.instances.append(self)

    def start(self):
        return None

    def session_exists(self, expected_pid=None):
        return True

    def inject(self, window, text):
        self.injected.append((window, text))

    def submit(self, window, text):
        self.submitted.append((window, text))

    def pane_display(self, window):
        return PaneDisplay(
            tty_path=f"/dev/pts/{window.rsplit(':', 1)[-1]}",
            cursor_x=0,
            cursor_y=0,
            pane_height=24,
            alternate_on=False,
        )

    def close(self):
        return None


def test_service_delivery_injects_pending_messages(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "pane")
    message_id = store.add("repo-a", "repo-b", "continue")
    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)
    Service(store=store)._deliver_once()
    assert FakeControl.instances[-1].injected == [("tamq:repo-b", "#repo-a: continue")]
    assert store.list()[0]["message_id"] == message_id
    assert store.list()[0]["state"] == "injected"


def test_service_never_injects_manual_endpoint_messages(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "manual")
    store.add("repo-a", "repo-b", "continue")
    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)

    Service(store=store)._deliver_once()

    assert FakeControl.instances[-1].injected == []
    assert store.list()[0]["state"] == "pending"


def test_service_pushy_mode_submits_once_and_marks_injected(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "pushy")
    message_id = store.add("repo-a", "repo-b", "first\nsecond")
    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)
    service = Service(store=store)

    service._deliver_once()
    control = FakeControl.instances[-1]
    service._deliver_once()

    assert control.submitted == [
        (
            "tamq:repo-b",
            f"# from repo-a: first\\x0asecond [{message_id}]",
        )
    ]
    assert store.list()[0]["state"] == "injected"


def test_failed_pushy_submission_remains_pending(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "pushy")
    store.add("repo-a", "repo-b", "continue")

    class FailingControl(FakeControl):
        def submit(self, window, text):
            raise RuntimeError("tmux rejected input")

    monkeypatch.setattr("tamq.service.ControlModeClient", FailingControl)
    Service(store=store)._deliver_once()

    assert store.list()[0]["state"] == "pending"


def test_service_writes_output_once_and_retains_pending_ack(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "output")
    message_id = store.add("repo-a", "repo-b", "continue")
    writes = []
    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)
    monkeypatch.setattr(
        "tamq.service.write_terminal_output",
        lambda path, text: writes.append((path, text)),
    )
    service = Service(store=store)

    service._deliver_once()
    service._deliver_once()

    assert writes == [
        (
            "/dev/pts/repo-b",
            f"\r\n#repo-a: continue [{message_id}]\r\n",
        )
    ]
    row = store.list()[0]
    assert row["state"] == "pending"
    assert row["displayed_at"] is not None
    assert store.db.execute("SELECT COUNT(*) FROM leases").fetchone()[0] == 0


def test_failed_terminal_output_remains_undisplayed_and_retryable(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"], "output")
    store.add("repo-a", "repo-b", "continue")
    attempts = []
    monkeypatch.setattr("tamq.service.ControlModeClient", FakeControl)

    def fail_once(path, text):
        attempts.append((path, text))
        if len(attempts) == 1:
            raise OSError("temporary failure")

    monkeypatch.setattr("tamq.service.write_terminal_output", fail_once)
    service = Service(store=store)

    service._deliver_once()
    assert store.list()[0]["displayed_at"] is None
    store.db.execute("UPDATE leases SET expires_at=0")
    store.db.commit()
    service._deliver_once()

    assert len(attempts) == 2
    assert store.list()[0]["displayed_at"] is not None


def test_service_disconnects_disappeared_tmux_endpoint(tmp_path, monkeypatch):
    store = Store(tmp_path / "queue.sqlite3")
    store.register_endpoint("tmux-amq-9-boot", 9, "tamq", ["repo-b"])

    class MissingControl(FakeControl):
        def session_exists(self, expected_pid=None):
            assert expected_pid == 9
            return False

    monkeypatch.setattr("tamq.service.ControlModeClient", MissingControl)
    Service(store=store)._deliver_once()
    assert store.endpoints() == []