#!/usr/bin/env bash
set -euo pipefail

: "${FILE:?FILE is required}"

if command -v python >/dev/null 2>&1; then
  PYTHON_BIN=python
elif command -v python3 >/dev/null 2>&1; then
  PYTHON_BIN=python3
else
  echo "python is required but was not found"
  exit 1
fi

current_version=$($PYTHON_BIN - <<'PY'
import re
import os
p=os.environ["FILE"]
s=open(p).read()
m=re.search(r'version\s*=\s*"([^"]+)";', s)
print(m.group(1) if m else "")
PY
)

page=$(curl -fsSL https://www.ocenaudio.com/download)
latest_version=$(printf '%s' "$page" | "$PYTHON_BIN" -c 'import re,sys; s=sys.stdin.read(); m=re.search(r"ocenaudio_debian12\.deb</p>\s*<p>Versão ([0-9.]+)</p>", s); print(m.group(1) if m else "")')

if [ -z "$latest_version" ]; then
  echo "failed to detect latest ocenaudio version"
  exit 1
fi

echo "current=$current_version"
echo "latest=$latest_version"

if [ "$latest_version" = "$current_version" ]; then
  echo "updated=false" >> "$GITHUB_OUTPUT"
  exit 0
fi

download_url="https://www.ocenaudio.com/downloads/index.php/ocenaudio_debian12.deb?version=v${latest_version}"
new_hash=$(nix store prefetch-file --json "$download_url" | "$PYTHON_BIN" -c 'import json,sys; print(json.load(sys.stdin)["hash"])')

export LATEST_VERSION="$latest_version"
export NEW_HASH="$new_hash"

"$PYTHON_BIN" - <<'PY'
import os
import re
p=os.environ["FILE"]
s=open(p).read()
s=re.sub(r'version\s*=\s*"[^"]+";', f'version = "{os.environ["LATEST_VERSION"]}";', s, count=1)
s=re.sub(r'hash\s*=\s*"[^"]+";', f'hash = "{os.environ["NEW_HASH"]}";', s, count=1)
open(p, "w").write(s)
PY

echo "updated=true" >> "$GITHUB_OUTPUT"
echo "version=$latest_version" >> "$GITHUB_OUTPUT"
echo "previous_version=$current_version" >> "$GITHUB_OUTPUT"
echo "release_url=https://www.ocenaudio.com/changelog" >> "$GITHUB_OUTPUT"