# this script should only be called via
#    tox run -e check-min-python-is-tested
#
# no other usages are supported
import pathlib
import subprocess
import sys

import ruamel.yaml

YAML = ruamel.yaml.YAML(typ="safe")
REPO_ROOT = pathlib.Path(__file__).parent.parent

proc = subprocess.run(
    ["python", "-m", "mddj", "read", "requires-python", "--lower-bound"],
    check=True,
    capture_output=True,
    cwd=REPO_ROOT,
)
requires_python_version = proc.stdout.decode().strip()

with open(REPO_ROOT / ".github" / "workflows" / "test.yaml") as f:
    workflow = YAML.load(f)
    includes = workflow["jobs"]["test"]["strategy"]["matrix"]["include"]
    for include in includes:
        if include["name"] == "Linux":
            break
    else:
        raise ValueError("Could not find 'Linux' in the test matrix.")

    for environment in include["tox-post-environments"]:
        if environment.endswith("-mindeps"):
            break
    else:
        raise ValueError("Could not find a '-mindeps' tox-post-environment.")

    python_version, _, _ = environment.partition("-")
    if python_version != f"py{requires_python_version}":
        print("ERROR: ensure_min_python_is_tested.py failed!")
        print(
            f"\nPackage data sets 'Requires-Python: >={requires_python_version}', "
            f"but the test-mindeps job is configured to test '{python_version}'.\n",
            file=sys.stderr,
        )
        sys.exit(1)


proc = subprocess.run(
    ["python", "-m", "mddj", "read", "tox", "min-version"],
    check=True,
    capture_output=True,
    cwd=REPO_ROOT,
)
tox_min_python_version = proc.stdout.decode().strip()
if tox_min_python_version != requires_python_version:
    print("ERROR: ensure_min_python_is_tested.py failed!")
    print(
        f"\nPackage data sets 'Requires-Python: >={requires_python_version}', "
        "but tox is configured to test with a minimum of "
        f"'{tox_min_python_version}'.\n",
        file=sys.stderr,
    )
    sys.exit(1)