"""Assemble and build the Nuitka wheel with setuptools."""

from __future__ import annotations

import re
import shutil
import subprocess
import sys
from pathlib import Path

_BUILD_ROOT = Path(__file__).resolve().parents[1]
if str(_BUILD_ROOT) not in sys.path:
    sys.path.insert(0, str(_BUILD_ROOT))

from common.paths import sdk_dir

# PyPI rejects bare tags like "manylinux_x86_64"; require a glibc ABI version.
_MANYLINUX_TAG_RE = re.compile(
    r"(?:manylinux2014|manylinux_2_(?:17|24|27|28|31|34|35))_x86_64"
)

# Source of the PyPI project description (see read_long_description).
PYPI_README_RELPATH = Path("docs") / "pypi_readme.md"


def _license_text(project: dict) -> str | None:
    """Extract free-text license from either pyproject license form."""
    declared = project.get("license")
    if isinstance(declared, str):
        return declared
    if isinstance(declared, dict):
        text = declared.get("text")
        if isinstance(text, str):
            return text
    return None


def _person_strings(entries) -> list[str]:
    """Render PEP 621 author/maintainer tables as ``Name <email>`` strings."""
    rendered: list[str] = []
    for entry in entries or []:
        if not isinstance(entry, dict):
            continue
        name = (entry.get("name") or "").strip()
        email = (entry.get("email") or "").strip()
        if name and email:
            rendered.append(f"{name} <{email}>")
        elif name or email:
            rendered.append(name or email)
    return rendered


def metadata_kwargs(project: dict) -> dict:
    """Translate a pyproject ``[project]`` table into ``setup()`` keywords.

    The Nuitka wheel is built by a generated ``setup.py`` outside the normal
    setuptools pipeline, so every PyPI-visible field has to be passed through
    explicitly. Omitting them is what left the early PyPI releases with no
    ``Requires-Python``, classifiers, project URLs or license on the project page.
    """
    authors = _person_strings(project.get("authors"))
    maintainers = _person_strings(project.get("maintainers"))
    candidates = {
        "description": project.get("description"),
        "python_requires": project.get("requires-python"),
        "classifiers": list(project.get("classifiers") or []),
        "project_urls": dict(project.get("urls") or {}),
        "license": _license_text(project),
        "author": authors[0] if authors else None,
        "author_email": None,
        "maintainer": maintainers[0] if maintainers else None,
    }
    return {key: value for key, value in candidates.items() if value}


def read_long_description(repo_root: Path) -> str | None:
    """Return the PyPI long description, or ``None`` when it is missing.

    Deliberately not the repository ``README.md``: that file documents the
    closed-source build/publishing layout, which should not end up on the PyPI
    project page.
    """
    path = Path(repo_root) / PYPI_README_RELPATH
    if not path.is_file():
        print(
            f"[WARN] {PYPI_README_RELPATH.as_posix()} not found; the wheel will be "
            "published without a long description."
        )
        return None
    return path.read_text(encoding="utf-8")


def write_wheel_setup(
    wheel_dir: Path,
    *,
    version: str,
    package_data: dict[str, list[str]],
    install_requires: list[str],
    extras_require: dict[str, list[str]],
    project: dict | None = None,
    long_description: str | None = None,
) -> Path:
    metadata_lines = ""
    if project:
        for key, value in sorted(metadata_kwargs(project).items()):
            metadata_lines += f"    {key}={value!r},\n"
    if long_description:
        metadata_lines += "    long_description=_LONG_DESCRIPTION,\n"
        metadata_lines += '    long_description_content_type="text/markdown",\n'

    setup_py_path = wheel_dir / "setup.py"
    setup_content = f"""
from setuptools import setup, Distribution

class BinaryDistribution(Distribution):
    def has_ext_modules(self):
        return True

{'_LONG_DESCRIPTION = ' + repr(long_description) if long_description else ''}

setup(
    name="orisys",
    version="{version}",
{metadata_lines}    packages=['orisys', 'orisys.examples', 'orisys_blend'],
    package_dir={{'': 'wheel_root'}},
    package_data={package_data},
    include_package_data=True,
    install_requires={install_requires!r},
    extras_require={extras_require!r},
    distclass=BinaryDistribution,
    zip_safe=False,
)
"""
    setup_py_path.write_text(setup_content, encoding="utf-8")
    return setup_py_path


def run_bdist_wheel(wheel_dir: Path) -> Path | None:
    print("\n=== Building Wheel ===")
    subprocess.check_call([sys.executable, "setup.py", "bdist_wheel"], cwd=wheel_dir)
    wheels = sorted((wheel_dir / "dist").glob("*.whl"))
    return wheels[0] if wheels else None


def _ensure_auditwheel() -> None:
    try:
        subprocess.check_call(
            [sys.executable, "-m", "auditwheel", "--version"],
            stdout=subprocess.DEVNULL,
            stderr=subprocess.DEVNULL,
        )
    except (subprocess.CalledProcessError, FileNotFoundError):
        print("Installing auditwheel...")
        subprocess.check_call([sys.executable, "-m", "pip", "install", "auditwheel", "-q"])


def is_compliant_manylinux_wheel(wheel_path: Path) -> bool:
    """True if the wheel filename uses a PyPI-accepted manylinux x86_64 tag."""
    return bool(_MANYLINUX_TAG_RE.search(wheel_path.name))


def repair_linux_wheel(wheel_path: Path, repair_dir: Path) -> Path:
    """Run auditwheel show/repair and return a PyPI-compliant manylinux wheel.

    Raises RuntimeError if repair fails or the result still lacks a valid tag.
    On non-Linux platforms the input wheel is returned unchanged.
    """
    if sys.platform != "linux":
        print("Skipping auditwheel repair (not running on Linux).")
        return wheel_path

    _ensure_auditwheel()
    repair_dir = repair_dir.resolve()
    if repair_dir.exists():
        shutil.rmtree(repair_dir)
    repair_dir.mkdir(parents=True)

    print("\n=== auditwheel show ===")
    subprocess.check_call([sys.executable, "-m", "auditwheel", "show", str(wheel_path)])

    print("\n=== auditwheel repair ===")
    subprocess.check_call(
        [
            sys.executable,
            "-m",
            "auditwheel",
            "repair",
            str(wheel_path),
            "--wheel-dir",
            str(repair_dir),
        ]
    )

    repaired = sorted(repair_dir.glob("*.whl"))
    if not repaired:
        raise RuntimeError(f"auditwheel repair produced no wheels in {repair_dir}")

    compliant = [path for path in repaired if is_compliant_manylinux_wheel(path)]
    if not compliant:
        names = ", ".join(path.name for path in repaired)
        raise RuntimeError(
            "auditwheel repair did not produce a PyPI-compliant manylinux tag. "
            f"Got: {names}. Rebuild inside quay.io/pypa/manylinux_2_28_x86_64 "
            "(or manylinux2014_x86_64) instead of a generic Linux host."
        )

    final = compliant[0]
    print(f"Repaired wheel: {final.name}")
    return final


def publish_wheel_to_sdk(wheel_path: Path, version: str) -> Path:
    sdk_version_dir = sdk_dir(version)
    sdk_version_dir.mkdir(parents=True, exist_ok=True)
    dest_wheel = sdk_version_dir / wheel_path.name
    if dest_wheel.exists():
        dest_wheel.unlink()
    shutil.copy2(str(wheel_path), str(dest_wheel))
    return dest_wheel