#!/usr/bin/env -S uv run --quiet
# /// script
# requires-python = ">=3.13"
# dependencies = [
#     "nox",
# ]
# ///

from __future__ import annotations

import json
import os
from pathlib import Path

import nox

nox.options.default_venv_backend = "uv|virtualenv"
nox.options.reuse_existing_virtualenvs = True

PY39 = "3.9"
PY310 = "3.10"
PY311 = "3.11"
PY312 = "3.12"
PY313 = "3.13"
PY_VERSIONS = [PY39, PY310, PY311, PY312, PY313]
PY_DEFAULT = PY_VERSIONS[0]
PY_LATEST = PY_VERSIONS[-1]

DJ42 = "4.2"
DJ50 = "5.0"
DJ51 = "5.1"
DJMAIN = "main"
DJMAIN_MIN_PY = PY312
DJ_VERSIONS = [DJ42, DJ50, DJ51, DJMAIN]
DJ_LTS = [
    version for version in DJ_VERSIONS if version.endswith(".2") and version != DJMAIN
]
DJ_DEFAULT = DJ_LTS[0]
DJ_LATEST = DJ_VERSIONS[-2]


def version(ver: str) -> tuple[int, ...]:
    """Convert a string version to a tuple of ints, e.g. "3.10" -> (3, 10)"""
    return tuple(map(int, ver.split(".")))


def should_skip(python: str, django: str) -> bool:
    """Return True if the test should be skipped"""

    if django == DJMAIN and version(python) < version(DJMAIN_MIN_PY):
        # Django main requires Python 3.10+
        return True

    if django == DJ51 and version(python) < version(PY310):
        # Django 5.1 requires Python 3.10+
        return True

    if django == DJ50 and version(python) < version(PY310):
        # Django 5.0 requires Python 3.10+
        return True

    return False


@nox.session
def test(session):
    session.notify(f"tests(python='{PY_DEFAULT}', django='{DJ_DEFAULT}')")


@nox.session
@nox.parametrize(
    "python,django",
    [
        (python, django)
        for python in PY_VERSIONS
        for django in DJ_VERSIONS
        if not should_skip(python, django)
    ],
)
def tests(session, django):
    session.run_install(
        "uv",
        "sync",
        "--frozen",
        "--inexact",
        "--no-install-package",
        "django",
        "--python",
        session.python,
        env={"UV_PROJECT_ENVIRONMENT": session.virtualenv.location},
    )

    if django == DJMAIN:
        session.install(
            "django @ https://github.com/django/django/archive/refs/heads/main.zip"
        )
    else:
        session.install(f"django=={django}")

    command = ["cargo", "test"]
    if session.posargs:
        args = []
        for arg in session.posargs:
            if arg:
                args.extend(arg.split(" "))
        command.extend(args)
    session.run(*command, external=True)


@nox.session
def lint(session):
    session.run(
        "uv",
        "run",
        "--with",
        "pre-commit-uv",
        "--python",
        PY_LATEST,
        "pre-commit",
        "run",
        "--all-files",
    )


@nox.session
def gha_matrix(session):
    os_args = session.posargs[0] if session.posargs else ""
    os_list = [os.strip() for os in os_args.split(",") if os_args.strip()] or [
        "ubuntu-latest"
    ]

    sessions = session.run("nox", "-l", "--json", external=True, silent=True)
    versions_list = [
        {
            "django-version": session["call_spec"]["django"],
            "python-version": session["python"],
        }
        for session in json.loads(sessions)
        if session["name"] == "tests"
    ]

    matrix = {
        "include": [{**combo, "os": os} for os in os_list for combo in versions_list]
    }

    if os.environ.get("GITHUB_OUTPUT"):
        with Path(os.environ["GITHUB_OUTPUT"]).open("a") as fh:
            print(f"matrix={matrix}", file=fh)
    else:
        print(matrix)


if __name__ == "__main__":
    nox.main()