#!/usr/bin/env bash
# Build HSRename as an AppImage.
# Requires: pip install -r requirements.txt -r requirements-build.txt
# Optional: appimagetool from https://github.com/AppImage/appimagetool/releases (for building the final .AppImage)
# Uses HSRename.png in the project folder as the app icon.

set -e
cd "$(dirname "$0")"
APP_NAME="HSRename"
APPDIR="${APP_NAME}.AppDir"
EXE_NAME="$APP_NAME"
VERSION="$(tr -d '[:space:]' < VERSION 2>/dev/null || echo "")"

echo "=== Installing build deps ==="
pip install -q -r requirements.txt -r requirements-build.txt

echo "=== Running PyInstaller (clean) ==="
rm -rf build dist HSRename.spec
pyinstaller --noconfirm --onedir --windowed \
  -n "$EXE_NAME" \
  --hidden-import=engine \
  --hidden-import=engine.rules \
  --hidden-import=engine.pipeline \
  --hidden-import=engine.tvdb_client \
  --hidden-import=engine.episode_match \
  --hidden-import=gui \
  --hidden-import=gui.main_window \
  --hidden-import=gui.rule_widgets \
  main.py

echo "=== Creating AppDir ==="
rm -rf "$APPDIR"
mkdir -p "$APPDIR/usr/bin"
cp -a "dist/$EXE_NAME" "$APPDIR/usr/bin/"
mkdir -p "$APPDIR/usr/share/hsrename"
echo "$VERSION" > "$APPDIR/usr/share/hsrename/VERSION"
if [[ -f "packaging/release-stamp-${VERSION}.txt" ]]; then
  cp "packaging/release-stamp-${VERSION}.txt" "$APPDIR/usr/share/hsrename/release-stamp.txt"
fi
# Gear Lever (Forgejo) treats same-size AppImages as "no update". Version-scoped
# padding keeps each release a unique download size without affecting the app.
IFS=. read -r VER_MAJOR VER_MINOR VER_PATCH <<< "${VERSION}.0.0"
PAD_KB=$((300 + VER_MAJOR * 100 + VER_MINOR * 20 + VER_PATCH * 10))
dd if=/dev/urandom of="$APPDIR/usr/share/hsrename/.release-pad" bs=1024 count="$PAD_KB" status=none
echo "Release padding: ${PAD_KB} KiB (Gear Lever update detection)"

cat > "$APPDIR/AppRun" << EOF
#!/bin/sh
SELF=\$(readlink -f "\$0")
HERE=\${SELF%/*}
exec "\$HERE/usr/bin/$EXE_NAME/$EXE_NAME" "\$@"
EOF
chmod +x "$APPDIR/AppRun"

cat > "$APPDIR/hsrename.desktop" << EOF
[Desktop Entry]
Name=HSRename
Comment=Mass rename files with preview and flexible rules
Exec=HSRename
Icon=HSRename
Type=Application
Categories=Utility;FileTools;
X-AppImage-Version=${VERSION}
EOF
# Use project icon as app icon and logo
if [[ -f HSRename.png ]]; then
  cp HSRename.png "$APPDIR/HSRename.png"
else
  echo "Warning: HSRename.png not found; appimagetool may fail or use no icon."
fi

echo "=== Building AppImage (requires appimagetool) ==="
if command -v appimagetool &>/dev/null; then
  OUT="${APP_NAME}.AppImage"
  appimagetool "$APPDIR" "$OUT"
  echo "Done: $OUT"
else
  echo "AppDir is ready at $APPDIR/"
  echo "To create the .AppImage, install appimagetool and run:"
  echo "  appimagetool $APPDIR ${APP_NAME}.AppImage"
  exit 1
fi

if ! strings "dist/$EXE_NAME/$EXE_NAME" | grep -q "engine.tvdb_client"; then
  echo "ERROR: Built executable is missing TheTVDB modules." >&2
  exit 1
fi