import sys
from pathlib import Path
from types import SimpleNamespace

sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))

import pytest  # noqa: E402

from llamacppctl import actions, http_ops  # noqa: E402
from llamacppctl.docker_ops import ContainerInfo  # noqa: E402
from llamacppctl.http_ops import HttpError  # noqa: E402
from llamacppctl.lock_ops import FileLock, LockError  # noqa: E402
from llamacppctl.schema import ChatReply, CheckResult  # noqa: E402
from tests.test_docker_ops import make_cfg  # noqa: E402


def _cfg(tmp_path):
    return make_cfg(lock_file=tmp_path / "test.lock")


# --- dry-run must be a pure preview (no side effects) ---------------------


def test_do_start_dry_run_does_not_start(tmp_path, monkeypatch, capsys):
    cfg = _cfg(tmp_path)
    called = {"start": 0}
    monkeypatch.setattr(actions, "start_llama_container", lambda c: called.__setitem__("start", 1))
    rc = actions.do_start(cfg, SimpleNamespace(), SimpleNamespace(dry_run=True))
    assert rc == actions.EXIT_OK
    assert called["start"] == 0
    assert "docker run" in capsys.readouterr().out


def test_do_change_dry_run_does_not_remove(tmp_path, monkeypatch):
    cfg = _cfg(tmp_path)
    called = {"remove": 0}
    monkeypatch.setattr(actions, "remove_container", lambda n: called.__setitem__("remove", 1))
    rc = actions.do_change(cfg, SimpleNamespace(), SimpleNamespace(dry_run=True))
    assert rc == actions.EXIT_OK
    assert called["remove"] == 0


# --- --change must validate BEFORE removing the running container ----------


def test_do_change_validates_before_remove(tmp_path, monkeypatch):
    cfg = _cfg(tmp_path)
    called = {"remove": 0, "start": 0}
    monkeypatch.setattr(actions, "remove_container", lambda n: called.__setitem__("remove", 1))
    monkeypatch.setattr(actions, "start_llama_container", lambda c: called.__setitem__("start", 1))

    def missing(_cfg):
        raise FileNotFoundError("model file not found: /x")

    monkeypatch.setattr(actions, "validate_model_path", missing)
    rc = actions.do_change(cfg, SimpleNamespace(), SimpleNamespace(dry_run=False, force=False))
    assert rc == actions.EXIT_MODEL_PATH_MISSING
    assert called["remove"] == 0  # container was NOT touched
    assert called["start"] == 0


# --- do_chat -------------------------------------------------------------


def test_do_chat_prints_content(tmp_path, monkeypatch, capsys):
    cfg = _cfg(tmp_path)
    monkeypatch.setattr(actions, "chat_completion_text", lambda c, p: ChatReply("Hallo", "stop"))
    prompt = SimpleNamespace(user_prompt="hi", max_tokens=2048)
    rc = actions.do_chat(cfg, prompt, SimpleNamespace(stream=False))
    assert rc == actions.EXIT_OK
    assert capsys.readouterr().out.strip() == "Hallo"


def test_do_chat_truncated_empty_warns_and_fails(tmp_path, monkeypatch, capsys):
    cfg = _cfg(tmp_path)
    monkeypatch.setattr(actions, "chat_completion_text", lambda c, p: ChatReply("", "length"))
    prompt = SimpleNamespace(user_prompt="hi", max_tokens=128)
    rc = actions.do_chat(cfg, prompt, SimpleNamespace(stream=False))
    assert rc == actions.EXIT_GENERAL
    err = capsys.readouterr().err
    assert "max_tokens=128" in err and "abgeschnitten" in err


def test_do_chat_http_error_returns_not_ready(tmp_path, monkeypatch):
    cfg = _cfg(tmp_path)

    def boom(c, p):
        raise HttpError("down")

    monkeypatch.setattr(actions, "chat_completion_text", boom)
    prompt = SimpleNamespace(user_prompt="hi", max_tokens=2048)
    rc = actions.do_chat(cfg, prompt, SimpleNamespace(stream=False))
    assert rc == actions.EXIT_HTTP_NOT_READY


def test_do_chat_stream(tmp_path, monkeypatch, capsys):
    cfg = _cfg(tmp_path)
    monkeypatch.setattr(
        actions,
        "stream_chat",
        lambda c, p: iter([("content", "Hal"), ("content", "lo"), ("finish", "stop")]),
    )
    prompt = SimpleNamespace(user_prompt="hi", max_tokens=2048)
    rc = actions.do_chat(cfg, prompt, SimpleNamespace(stream=True))
    assert rc == actions.EXIT_OK
    assert capsys.readouterr().out.strip() == "Hallo"


# --- exit-code mapping & force stop --------------------------------------


def test_check_exit_code():
    ok = CheckResult(True, True, True, True, True, "u", "")
    down = CheckResult(True, False, False, False, False, "u", "")
    missing = CheckResult(False, False, False, False, False, "u", "")
    assert actions.check_exit_code(ok) == actions.EXIT_OK
    assert actions.check_exit_code(down) == actions.EXIT_HTTP_NOT_READY
    assert actions.check_exit_code(missing) == actions.EXIT_HTTP_NOT_READY


def test_do_stop_passes_force(tmp_path, monkeypatch):
    cfg = _cfg(tmp_path)
    seen = {}

    def fake_stop(name, remove=True, force=False):
        seen["force"] = force
        return True

    monkeypatch.setattr(actions, "stop_container", fake_stop)
    actions.do_stop(cfg, SimpleNamespace(force=True))
    assert seen["force"] is True


# --- do_check ------------------------------------------------------------


def test_do_check_running_and_healthy(tmp_path, monkeypatch):
    cfg = _cfg(tmp_path)
    monkeypatch.setattr(
        actions, "inspect_container", lambda n: ContainerInfo(n, "running", "healthy")
    )
    monkeypatch.setattr(http_ops, "check_health", lambda c: True)
    monkeypatch.setattr(http_ops, "check_models", lambda c: True)
    monkeypatch.setattr(actions, "chat_completion_text", lambda c, p: ChatReply("ok", "stop"))
    result = actions.do_check(cfg, SimpleNamespace(user_prompt="ping", max_tokens=8), SimpleNamespace())
    assert result.container_running is True
    assert result.http_ok is True
    assert result.chat_ok is True
    assert actions.check_exit_code(result) == actions.EXIT_OK


def test_do_check_missing_container(tmp_path, monkeypatch):
    cfg = _cfg(tmp_path)
    monkeypatch.setattr(
        actions, "inspect_container", lambda n: ContainerInfo(n, "missing", "none")
    )
    result = actions.do_check(cfg, SimpleNamespace(user_prompt=None, max_tokens=8), SimpleNamespace())
    assert result.container_exists is False
    assert result.container_running is False
    assert result.http_ok is False
    assert actions.check_exit_code(result) == actions.EXIT_HTTP_NOT_READY


# --- do_start (non-dry-run) ----------------------------------------------


def _wire_start(monkeypatch, ready: bool):
    monkeypatch.setattr(actions, "validate_model_path", lambda c: None)
    monkeypatch.setattr(actions, "start_llama_container", lambda c: "abc123def456")
    monkeypatch.setattr(actions, "wait_until_ready", lambda c, p: ready)
    monkeypatch.setattr(actions, "container_logs", lambda n, t=100: "log tail")


def test_do_start_happy_path(tmp_path, monkeypatch, capsys):
    cfg = _cfg(tmp_path)
    _wire_start(monkeypatch, ready=True)
    monkeypatch.setattr(actions, "chat_completion_text", lambda c, p: ChatReply("Servus", "stop"))
    prompt = SimpleNamespace(user_prompt="hi", max_tokens=2048)
    rc = actions.do_start(cfg, prompt, SimpleNamespace(dry_run=False, force=False, logs=False))
    out = capsys.readouterr().out
    assert rc == actions.EXIT_OK
    assert "Model ready." in out
    assert "Servus" in out


def test_do_start_readiness_failure(tmp_path, monkeypatch, capsys):
    cfg = _cfg(tmp_path)
    _wire_start(monkeypatch, ready=False)
    prompt = SimpleNamespace(user_prompt=None, max_tokens=2048)
    rc = actions.do_start(cfg, prompt, SimpleNamespace(dry_run=False, force=False, logs=True, log_lines=50))
    err = capsys.readouterr().err
    assert rc == actions.EXIT_HTTP_NOT_READY
    assert "did not become ready" in err
    assert "log tail" in err  # --logs printed the tail


# --- _container_lock force bypass ----------------------------------------


def test_container_lock_busy_raises_without_force(tmp_path):
    cfg = _cfg(tmp_path)
    with FileLock(cfg.lock_file):  # hold the lock
        with pytest.raises(LockError):
            with actions._container_lock(cfg, SimpleNamespace(force=False)):
                pass


def test_container_lock_force_bypasses_busy(tmp_path, capsys):
    cfg = _cfg(tmp_path)
    entered = False
    with FileLock(cfg.lock_file):  # hold the lock
        with actions._container_lock(cfg, SimpleNamespace(force=True)):
            entered = True
    assert entered is True
    assert "busy lock" in capsys.readouterr().err