"""Helper script for session_cli.robot smoke tests.

Each subcommand is a self-contained check that prints a sentinel on success.
"""

from __future__ import annotations

import os
import sys
import tempfile
from datetime import datetime
from pathlib import Path
from unittest.mock import MagicMock

# Ensure local source tree is importable
_SRC = str(Path(__file__).resolve().parents[1] / "src")
if _SRC not in sys.path:
    sys.path.insert(0, _SRC)

from typer.testing import CliRunner  # noqa: E402
from ulid import ULID  # noqa: E402

from cleveragents.cli.commands import session as session_mod  # noqa: E402
from cleveragents.cli.commands.session import app as session_app  # noqa: E402
from cleveragents.domain.models.core.session import (  # noqa: E402
    MessageRole,
    Session,
    SessionMessage,
    SessionNotFoundError,
    SessionTokenUsage,
)

runner = CliRunner()


def _mock_session(
    session_id: str | None = None,
    actor_name: str | None = None,
    messages: list[SessionMessage] | None = None,
) -> Session:
    """Create a test Session instance."""
    return Session(
        session_id=session_id or str(ULID()),
        actor_name=actor_name,
        namespace="local",
        messages=messages or [],
        token_usage=SessionTokenUsage(
            input_tokens=100,
            output_tokens=50,
            estimated_cost=0.005,
        ),
        created_at=datetime.now(),
        updated_at=datetime.now(),
    )


def _mock_message(
    role: MessageRole = MessageRole.USER,
    content: str = "Hello",
    sequence: int = 0,
) -> SessionMessage:
    return SessionMessage(
        message_id=str(ULID()),
        role=role,
        content=content,
        sequence=sequence,
        timestamp=datetime.now(),
    )


def _setup_service() -> MagicMock:
    """Create and install a mock service."""
    svc = MagicMock()
    session_mod._service = svc
    return svc


def _teardown() -> None:
    session_mod._service = None


# ---------------------------------------------------------------------------
# Subcommands
# ---------------------------------------------------------------------------


def create_default() -> None:
    svc = _setup_service()
    svc.create.return_value = _mock_session()
    try:
        result = runner.invoke(session_app, ["create"])
        assert result.exit_code == 0, f"exit={result.exit_code}: {result.output}"
        print("session-cli-create-default-ok")
    finally:
        _teardown()


def create_actor() -> None:
    svc = _setup_service()
    svc.create.return_value = _mock_session(actor_name="openai/gpt-4")
    try:
        result = runner.invoke(session_app, ["create", "--actor", "openai/gpt-4"])
        assert result.exit_code == 0, f"exit={result.exit_code}: {result.output}"
        assert "openai/gpt-4" in result.output
        print("session-cli-create-actor-ok")
    finally:
        _teardown()


def list_empty() -> None:
    svc = _setup_service()
    svc.list.return_value = []
    try:
        result = runner.invoke(session_app, ["list"])
        assert result.exit_code == 0
        assert "No sessions found" in result.output
        print("session-cli-list-empty-ok")
    finally:
        _teardown()


def list_populated() -> None:
    svc = _setup_service()
    svc.list.return_value = [
        _mock_session(actor_name="openai/gpt-4"),
        _mock_session(),
    ]
    try:
        result = runner.invoke(session_app, ["list"])
        assert result.exit_code == 0
        assert "Sessions" in result.output
        print("session-cli-list-populated-ok")
    finally:
        _teardown()


def show_valid() -> None:
    sid = str(ULID())
    svc = _setup_service()
    session = _mock_session(
        session_id=sid,
        messages=[
            _mock_message(MessageRole.USER, "Hello", 0),
            _mock_message(MessageRole.ASSISTANT, "Hi there", 1),
        ],
    )
    svc.get.return_value = session
    try:
        result = runner.invoke(session_app, ["show", sid])
        assert result.exit_code == 0, f"exit={result.exit_code}: {result.output}"
        assert "Session Details" in result.output
        print("session-cli-show-valid-ok")
    finally:
        _teardown()


def show_not_found() -> None:
    svc = _setup_service()
    svc.get.side_effect = SessionNotFoundError("not found")
    try:
        result = runner.invoke(session_app, ["show", "INVALID"])
        assert result.exit_code != 0
        assert "Session not found" in result.output
        print("session-cli-show-not-found-ok")
    finally:
        _teardown()


def delete_yes() -> None:
    sid = str(ULID())
    svc = _setup_service()
    svc.get.return_value = _mock_session(session_id=sid)
    svc.delete.return_value = None
    try:
        result = runner.invoke(session_app, ["delete", sid, "--yes"])
        assert result.exit_code == 0, f"exit={result.exit_code}: {result.output}"
        assert "deleted" in result.output
        print("session-cli-delete-yes-ok")
    finally:
        _teardown()


def export_import_roundtrip() -> None:
    """Test export to file then import back."""
    sid = str(ULID())
    svc = _setup_service()

    session = _mock_session(session_id=sid, actor_name="openai/gpt-4")
    svc.get.return_value = session
    export_data = session.as_export_dict()
    svc.export_session.return_value = export_data

    fd, path = tempfile.mkstemp(suffix=".json")
    os.close(fd)
    os.unlink(path)

    try:
        # Export
        result = runner.invoke(session_app, ["export", sid, "--output", path])
        assert result.exit_code == 0, f"export exit={result.exit_code}: {result.output}"
        assert os.path.exists(path)

        # Set up import mock
        imported = _mock_session(actor_name="openai/gpt-4")
        svc.import_session.return_value = imported

        # Import
        result = runner.invoke(session_app, ["import", "--input", path])
        assert result.exit_code == 0, f"import exit={result.exit_code}: {result.output}"
        assert "Session Imported" in result.output

        print("session-cli-export-import-roundtrip-ok")
    finally:
        if os.path.exists(path):
            os.unlink(path)
        _teardown()


def tell_message() -> None:
    sid = str(ULID())
    svc = _setup_service()
    svc.get.return_value = _mock_session(session_id=sid)
    svc.append_message.side_effect = [
        _mock_message(MessageRole.USER, "Hello", 0),
        _mock_message(MessageRole.ASSISTANT, "Acknowledged: Hello", 1),
    ]
    try:
        result = runner.invoke(session_app, ["tell", "--session", sid, "Hello"])
        assert result.exit_code == 0, f"exit={result.exit_code}: {result.output}"
        assert "Acknowledged" in result.output
        print("session-cli-tell-message-ok")
    finally:
        _teardown()


# ---------------------------------------------------------------------------
# Dispatcher
# ---------------------------------------------------------------------------

_COMMANDS: dict[str, object] = {
    "create-default": create_default,
    "create-actor": create_actor,
    "list-empty": list_empty,
    "list-populated": list_populated,
    "show-valid": show_valid,
    "show-not-found": show_not_found,
    "delete-yes": delete_yes,
    "export-import-roundtrip": export_import_roundtrip,
    "tell-message": tell_message,
}

if __name__ == "__main__":
    if len(sys.argv) < 2 or sys.argv[1] not in _COMMANDS:
        print(f"Usage: {sys.argv[0]} <{'|'.join(_COMMANDS)}>", file=sys.stderr)
        sys.exit(1)
    cmd = _COMMANDS[sys.argv[1]]
    cmd()  # type: ignore[operator]