"""Step definitions for project_create_persist.feature (bug #589).

Regression tests verifying that ``agents project create`` commits data
to the database so that ``agents project list`` shows previously created
projects.

Design rationale
~~~~~~~~~~~~~~~~
The bug was that ``NamespacedProjectRepository.create()`` called
``session.flush()`` but never ``session.commit()``.  Each CLI invocation
obtains a **new** session from the factory, so flushed-but-uncommitted
rows were invisible to subsequent invocations.

To exercise the fix we use a **file-based** SQLite database and patch
``_get_namespaced_project_repo`` so that every CLI invocation receives a
*fresh* ``NamespacedProjectRepository`` backed by a **new session
factory** pointing at the same file.  This mirrors real CLI behaviour
where each ``agents project …`` invocation gets its own session.
"""

from __future__ import annotations

import os
import shutil
import tempfile
from typing import Any
from unittest.mock import patch

from behave import given, then, when
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import NullPool
from typer.testing import CliRunner

from cleveragents.cli.commands.project import app as project_app
from cleveragents.infrastructure.database.models import Base
from cleveragents.infrastructure.database.repositories import (
    NamespacedProjectRepository,
)

# Patch target - the module-level DI helper that returns the project repo.
_PATCH_PROJECT_REPO = "cleveragents.cli.commands.project._get_namespaced_project_repo"
# The --invariant flag is never passed in these scenarios, so
# _store_project_extras is effectively a no-op.  We patch it defensively
# to avoid side-effects from DI look-ups in the real implementation.
_PATCH_STORE_EXTRAS = "cleveragents.cli.commands.project._store_project_extras"

runner = CliRunner()


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------


def _make_fresh_repo(db_path: str) -> NamespacedProjectRepository:
    """Build a *new* repo with its own engine/session for *db_path*.

    Each call simulates a separate CLI invocation: a new engine and session
    factory are created, so uncommitted data from a prior invocation is not
    visible.  ``NullPool`` is used so that SQLite file handles are released
    immediately when the engine is no longer referenced.

    Schema is pre-created once during the Background step, so we skip
    ``Base.metadata.create_all()`` here to avoid redundant DDL.
    """
    engine = create_engine(f"sqlite:///{db_path}", echo=False, poolclass=NullPool)
    factory = sessionmaker(bind=engine, expire_on_commit=False)
    return NamespacedProjectRepository(session_factory=factory)


def _cleanup_persist_db(context: Any) -> None:
    """Remove the temporary directory created for the test."""
    shutil.rmtree(context.persist_tmpdir, ignore_errors=True)


# ---------------------------------------------------------------------------
# Background
# ---------------------------------------------------------------------------


@given("a fresh project-persist database is initialised")
def step_init_persist_db(context: Any) -> None:
    """Create a temp dir with a fresh SQLite file for persistence tests."""
    context.persist_tmpdir = tempfile.mkdtemp(prefix="persist_589_")
    context.persist_db_path = os.path.join(context.persist_tmpdir, "test.db")

    # Pre-create schema so every fresh repo sees the tables.
    engine = create_engine(
        f"sqlite:///{context.persist_db_path}",
        echo=False,
        poolclass=NullPool,
    )
    Base.metadata.create_all(engine)
    engine.dispose()

    # Initialise result holders.
    context.persist_create_results = []  # type: ignore[attr-defined]
    context.persist_list_result = None
    context.persist_dup_result = None

    context.add_cleanup(_cleanup_persist_db, context)


# ---------------------------------------------------------------------------
# When steps - create
# ---------------------------------------------------------------------------


@when('I create a project named "{name}" via the persist CLI')
def step_create_project_persist(context: Any, name: str) -> None:
    """Invoke ``project create <name>`` with a fresh repo per call."""
    repo = _make_fresh_repo(context.persist_db_path)
    with (
        patch(_PATCH_PROJECT_REPO, return_value=repo),
        patch(_PATCH_STORE_EXTRAS),
    ):
        result = runner.invoke(project_app, ["create", name])
    assert result.exit_code == 0, (
        f"project create '{name}' should exit 0 but got "
        f"{result.exit_code}. output:\n{result.output}"
    )
    context.persist_create_results.append(result)


@when('I attempt to create a duplicate project named "{name}" via the persist CLI')
def step_create_duplicate_persist(context: Any, name: str) -> None:
    """Invoke ``project create`` again for the same name (expect error)."""
    repo = _make_fresh_repo(context.persist_db_path)
    with (
        patch(_PATCH_PROJECT_REPO, return_value=repo),
        patch(_PATCH_STORE_EXTRAS),
    ):
        result = runner.invoke(project_app, ["create", name])
    context.persist_dup_result = result


# ---------------------------------------------------------------------------
# When steps - list
# ---------------------------------------------------------------------------


@when("I list projects via the persist CLI")
def step_list_projects_persist(context: Any) -> None:
    """Invoke ``project list`` with a fresh repo pointing at the same DB."""
    repo = _make_fresh_repo(context.persist_db_path)
    with patch(_PATCH_PROJECT_REPO, return_value=repo):
        result = runner.invoke(project_app, ["list"])
    assert result.exit_code == 0, (
        f"project list should exit 0 but got {result.exit_code}. "
        f"output:\n{result.output}"
    )
    context.persist_list_result = result


# ---------------------------------------------------------------------------
# Then steps
# ---------------------------------------------------------------------------


@then('the persist project list should contain "{name}"')
def step_persist_list_contains(context: Any, name: str) -> None:
    """Assert that the list output includes the given project name."""
    result = context.persist_list_result
    assert result is not None, "project list was not invoked"
    output = result.output
    assert name in output, (
        f"Expected '{name}' in project list output but got:\n{output}"
    )


@then('the persist duplicate creation should fail with "{text}"')
def step_persist_dup_fails(context: Any, text: str) -> None:
    """Assert that the duplicate creation produced an error containing *text*."""
    result = context.persist_dup_result
    assert result is not None, "duplicate create was not invoked"
    assert result.exit_code != 0, (
        f"Duplicate create should fail (exit_code != 0) but got "
        f"{result.exit_code}. output:\n{result.output}"
    )
    output = result.output
    assert text.lower() in output.lower(), (
        f"Expected '{text}' in duplicate-create output but got:\n{output}"
    )