"""AC-1: project scaffolded matching the layout in AZ-263.

Validates folder/file presence + that `pyproject.toml` and the top-level
`CMakeLists.txt` + `cmake/{dependencies,build_options}.cmake` parse without
error. The CMake configure step is gated on `cmake` being on PATH; when it
isn't, the test skips with an explicit prerequisite reason.
"""

from __future__ import annotations

import shutil
import subprocess
import sys
from pathlib import Path

import pytest

REPO_ROOT = Path(__file__).resolve().parents[2]


REQUIRED_PATHS: tuple[str, ...] = (
    "pyproject.toml",
    "CMakeLists.txt",
    "cmake/dependencies.cmake",
    "cmake/build_options.cmake",
    "cmake/strategies.cmake",
    ".clang-format",
    ".clang-tidy",
    ".cmake-format.yaml",
    ".editorconfig",
    ".env.example",
    ".dockerignore",
    ".gitignore",
    "README.md",
    "docker/companion-tier1.Dockerfile",
    "docker/operator-orchestrator.Dockerfile",
    "docker/mock-suite-sat-service.Dockerfile",
    "docker-compose.yml",
    "docker-compose.test.yml",
    ".github/workflows/ci.yml",
    ".github/workflows/ci-tier2.yml",
    ".github/workflows/release.yml",
    ".github/workflows/cve-rescan.yml",
    "ci/sbom_diff.py",
    "ci/opencv_pin_gate.py",
    "src/gps_denied_onboard/__init__.py",
    "src/gps_denied_onboard/runtime_root/__init__.py",
    "src/gps_denied_onboard/healthcheck.py",
    "src/gps_denied_onboard/_types/__init__.py",
    "src/gps_denied_onboard/helpers/__init__.py",
    "src/gps_denied_onboard/logging/structured.py",
    "src/gps_denied_onboard/config/loader.py",
    "src/gps_denied_onboard/fdr_client/client.py",
    "alembic.ini",
    "db/migrations/env.py",
    "db/migrations/versions/0001_initial.py",
    "scripts/run-tests.sh",
    "scripts/run-performance-tests.sh",
)

COMPONENT_DIRS: tuple[str, ...] = (
    "c1_vio",
    "c2_vpr",
    "c2_5_rerank",
    "c3_matcher",
    "c3_5_adhop",
    "c4_pose",
    "c5_state",
    "c6_tile_cache",
    "c7_inference",
    "c8_fc_adapter",
    "c10_provisioning",
    "c11_tile_manager",
    "c12_operator_orchestrator",
    "c13_fdr",
)


@pytest.mark.parametrize("rel_path", REQUIRED_PATHS)
def test_required_path_exists(rel_path: str) -> None:
    # Assert
    assert (REPO_ROOT / rel_path).exists(), f"missing required path: {rel_path}"


@pytest.mark.parametrize("component", COMPONENT_DIRS)
def test_component_has_interface_and_init(component: str) -> None:
    # Assert
    comp_root = REPO_ROOT / "src" / "gps_denied_onboard" / "components" / component
    assert (comp_root / "__init__.py").exists(), f"missing __init__.py for {component}"
    assert (comp_root / "interface.py").exists(), f"missing interface.py for {component}"


def test_pyproject_toml_parses() -> None:
    # Arrange
    if sys.version_info >= (3, 11):
        import tomllib
    else:
        try:
            import tomli as tomllib  # type: ignore[no-redef]
        except ImportError:  # pragma: no cover - tomli installed in dev extras
            pytest.skip("tomli/tomllib not available")

    # Act
    data = tomllib.loads((REPO_ROOT / "pyproject.toml").read_text())

    # Assert
    assert data["project"]["name"] == "gps-denied-onboard"
    assert any(dep.startswith("opencv-python") for dep in data["project"]["dependencies"]), (
        "opencv-python pin must be in dependencies"
    )


def test_cmake_files_configure() -> None:
    # Arrange
    cmake = shutil.which("cmake")
    if cmake is None:
        pytest.skip("cmake not on PATH; CI image installs cmake (Tier-1 ci.yml)")

    build_dir = REPO_ROOT / "build" / "ac1_smoke"
    build_dir.mkdir(parents=True, exist_ok=True)

    # Act
    result = subprocess.run(
        [
            cmake,
            "-S",
            str(REPO_ROOT),
            "-B",
            str(build_dir),
            "-DBUILD_TESTING=OFF",
        ],
        capture_output=True,
        text=True,
        check=False,
    )

    # Assert
    assert result.returncode == 0, (
        f"cmake configure failed:\nstdout:\n{result.stdout}\nstderr:\n{result.stderr}"
    )