"""Step definitions for database models uncovered-branch coverage tests.

Targets four specific coverage gaps in models.py:
  1. LifecyclePlanModel.from_domain with empty arguments (L948 loop zero-iter)
  2. ToolModel.from_domain with a plain dict (L1665-1666 dict branch of _get)
  3. SessionModel.from_domain with non-empty messages (L1920-1921)
  4. SkillModel column definitions short_name / description (L2131-2132)
"""

from __future__ import annotations

from datetime import UTC, datetime
from typing import Any

from behave import given, then, when
from behave.runner import Context
from ulid import ULID

# ═══════════════════════════════════════════════════════════════════════════
# Helpers
# ═══════════════════════════════════════════════════════════════════════════

_UTC = UTC


def _ulid() -> str:
    return str(ULID())


def _make_minimal_plan(
    *,
    arguments: dict[str, Any] | None = None,
    arguments_order: list[str] | None = None,
) -> Any:
    """Build a minimal Plan domain object suitable for from_domain.

    Uses real domain classes so the ORM helper exercises the same paths
    as production code.
    """
    from cleveragents.domain.models.core.plan import (
        NamespacedName,
        Plan,
        PlanIdentity,
        PlanPhase,
        PlanTimestamps,
        ProcessingState,
    )

    return Plan(
        identity=PlanIdentity(plan_id=_ulid()),
        namespaced_name=NamespacedName(namespace="local", name="test-plan"),
        description="A test plan for branch coverage",
        action_name="local/test-action",
        phase=PlanPhase.STRATEGIZE,
        processing_state=ProcessingState.QUEUED,
        strategy_actor="local/strategy",
        execution_actor="local/executor",
        timestamps=PlanTimestamps(),
        arguments=arguments if arguments is not None else {},
        arguments_order=arguments_order if arguments_order is not None else [],
    )


# ═══════════════════════════════════════════════════════════════════════════
# Scenario 1 - PlanModel.from_domain with empty arguments
# ═══════════════════════════════════════════════════════════════════════════


@given("db models branch a Plan domain object with empty arguments")
def step_given_plan_empty_args(context: Context) -> None:
    """Create a Plan domain object where arguments and arguments_order are empty."""
    context.dbm_plan = _make_minimal_plan(arguments={}, arguments_order=[])


@when("db models branch the plan is converted via LifecyclePlanModel from_domain")
def step_when_plan_from_domain(context: Context) -> None:
    from cleveragents.infrastructure.database.models import LifecyclePlanModel

    context.dbm_plan_model = LifecyclePlanModel.from_domain(context.dbm_plan)


@then("db models branch the resulting plan model has no argument rows")
def step_then_plan_no_args(context: Context) -> None:
    model = context.dbm_plan_model
    assert model.arguments_rel is not None, "arguments_rel should be a list"
    assert len(model.arguments_rel) == 0, (
        f"Expected 0 argument rows, got {len(model.arguments_rel)}"
    )


# ═══════════════════════════════════════════════════════════════════════════
# Scenario 2 - ToolModel.from_domain with a plain dict (dict branch of _get)
# ═══════════════════════════════════════════════════════════════════════════


@given("db models branch a plain dict describing a tool")
def step_given_tool_dict(context: Context) -> None:
    """Create a plain dict with the fields that ToolModel.from_domain reads."""
    context.dbm_tool_dict: dict[str, Any] = {
        "name": "local/coverage-tool",
        "description": "A tool created from a dict for branch coverage",
        "tool_type": "tool",
        "source": "builtin",
        "timeout": 60,
    }


@when("db models branch the dict is converted via ToolModel from_domain")
def step_when_tool_dict_from_domain(context: Context) -> None:
    from cleveragents.infrastructure.database.models import ToolModel

    context.dbm_tool_model = ToolModel.from_domain(context.dbm_tool_dict)


@then("db models branch the resulting tool model has the expected name and description")
def step_then_tool_model_fields(context: Context) -> None:
    model = context.dbm_tool_model
    assert model.name == "local/coverage-tool", f"name={model.name}"
    assert model.short_name == "coverage-tool", f"short_name={model.short_name}"
    assert model.namespace == "local", f"namespace={model.namespace}"
    assert "dict for branch coverage" in model.description, (
        f"description={model.description}"
    )
    assert model.tool_type == "tool", f"tool_type={model.tool_type}"
    assert model.source == "builtin", f"source={model.source}"
    assert model.timeout == 60, f"timeout={model.timeout}"


# ── Scenario 2b - dict tool with resource bindings ────────────────────────


@given("db models branch a plain dict describing a tool with resource bindings")
def step_given_tool_dict_with_bindings(context: Context) -> None:
    context.dbm_tool_dict_bindings: dict[str, Any] = {
        "name": "local/binding-tool",
        "description": "Tool with bindings from dict",
        "tool_type": "tool",
        "source": "builtin",
        "timeout": 120,
        "resource_bindings": [
            {
                "slot_name": "repo",
                "resource_type": "git-checkout",
                "access_mode": "read_write",
                "binding_mode": "static",
                "static_resource": "my-repo",
                "required": True,
                "description": "The repository",
            },
        ],
    }


@when("db models branch the binding dict is converted via ToolModel from_domain")
def step_when_tool_dict_bindings_from_domain(context: Context) -> None:
    from cleveragents.infrastructure.database.models import ToolModel

    context.dbm_tool_model_bindings = ToolModel.from_domain(
        context.dbm_tool_dict_bindings,
    )


@then("db models branch the resulting tool model has resource binding rows")
def step_then_tool_model_bindings(context: Context) -> None:
    model = context.dbm_tool_model_bindings
    assert len(model.resource_bindings_rel) == 1, (
        f"Expected 1 binding, got {len(model.resource_bindings_rel)}"
    )
    binding = model.resource_bindings_rel[0]
    assert binding.slot_name == "repo", f"slot_name={binding.slot_name}"
    assert binding.access_mode == "read_write", f"access_mode={binding.access_mode}"
    assert binding.binding_mode == "static", f"binding_mode={binding.binding_mode}"
    assert binding.static_resource == "my-repo", (
        f"static_resource={binding.static_resource}"
    )


# ═══════════════════════════════════════════════════════════════════════════
# Scenario 3 - SessionModel.from_domain with non-empty messages
# ═══════════════════════════════════════════════════════════════════════════


@given("db models branch a Session domain object with two messages")
def step_given_session_with_messages(context: Context) -> None:
    """Create a Session domain object that has two messages."""
    from cleveragents.domain.models.core.session import (
        MessageRole,
        Session,
        SessionMessage,
        SessionTokenUsage,
    )

    now = datetime.now(tz=_UTC)
    msg1 = SessionMessage(
        message_id=_ulid(),
        role=MessageRole.USER,
        content="Hello from user",
        sequence=0,
        timestamp=now,
    )
    msg2 = SessionMessage(
        message_id=_ulid(),
        role=MessageRole.ASSISTANT,
        content="Hello from assistant",
        sequence=1,
        timestamp=now,
    )
    context.dbm_session = Session(
        session_id=_ulid(),
        actor_name=None,
        namespace="local",
        messages=[msg1, msg2],
        linked_plan_ids=[],
        token_usage=SessionTokenUsage(
            input_tokens=10,
            output_tokens=20,
            estimated_cost=0.001,
        ),
        metadata={"source": "test"},
        created_at=now,
        updated_at=now,
    )


@when("db models branch the session is converted via SessionModel from_domain")
def step_when_session_from_domain(context: Context) -> None:
    from cleveragents.infrastructure.database.models import SessionModel

    context.dbm_session_model = SessionModel.from_domain(context.dbm_session)


@then("db models branch the resulting session model has two message children")
def step_then_session_has_messages(context: Context) -> None:
    model = context.dbm_session_model
    assert model.messages_rel is not None, "messages_rel should be a list"
    assert len(model.messages_rel) == 2, (
        f"Expected 2 message children, got {len(model.messages_rel)}"
    )
    roles = [m.role for m in model.messages_rel]
    assert "user" in roles, f"Expected 'user' role in {roles}"
    assert "assistant" in roles, f"Expected 'assistant' role in {roles}"
    # Verify content was serialised
    contents = [m.content for m in model.messages_rel]
    assert "Hello from user" in contents, f"Missing user content in {contents}"
    assert "Hello from assistant" in contents, (
        f"Missing assistant content in {contents}"
    )


# ═══════════════════════════════════════════════════════════════════════════
# Scenario 4 - SkillModel.from_domain populates short_name and description
# ═══════════════════════════════════════════════════════════════════════════


@given("db models branch a Skill domain dict with name and description")
def step_given_skill_dict(context: Context) -> None:
    context.dbm_skill_dict: dict[str, Any] = {
        "name": "local/cov-skill",
        "description": "Skill for coverage test",
        "tool_refs": ["local/some-tool"],
    }


@when("db models branch the skill dict is converted via SkillModel from_domain")
def step_when_skill_from_domain(context: Context) -> None:
    from cleveragents.infrastructure.database.models import SkillModel

    context.dbm_skill_model = SkillModel.from_domain(context.dbm_skill_dict)


@then(
    "db models branch the resulting skill model has correct short_name and description"
)
def step_then_skill_model_columns(context: Context) -> None:
    model = context.dbm_skill_model
    assert model.short_name == "cov-skill", f"short_name={model.short_name}"
    assert model.description == "Skill for coverage test", (
        f"description={model.description}"
    )
    assert model.namespace == "local", f"namespace={model.namespace}"
    assert model.name == "local/cov-skill", f"name={model.name}"