#!/usr/bin/env python3
"""Validate Clearview release version state before a release build."""
from __future__ import annotations

import re
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
VERSION_FILE = ROOT / "containers" / "clearview" / "src" / "clearview_app" / "version.py"
CHANGELOG = ROOT / "docs" / "changelog.md"

ns: dict[str, object] = {}
exec(VERSION_FILE.read_text(), ns)
version = str(ns.get("VERSION", ""))
build = int(ns.get("BUILD", -1))

if build != 0:
    raise SystemExit(f"Release builds require BUILD = 0 in {VERSION_FILE}; found BUILD = {build}")

match = re.search(r"^## (v\d+\.\d+\.\d+) — \d{4}-\d{2}-\d{2}\s*$", CHANGELOG.read_text(), flags=re.MULTILINE)
if not match:
    raise SystemExit(f"No release heading found in {CHANGELOG}; expected '## vX.Y.Z — YYYY-MM-DD'")

changelog_version = match.group(1)
if changelog_version != version:
    raise SystemExit(
        f"Version mismatch: {VERSION_FILE} has {version}, but top changelog release is {changelog_version}"
    )

print(f"[check-release-version] {version}")