#!/usr/bin/env bash
#
# make-pwa
# makes a chromium PWA desktop entry for the given url

set -e

usage() {
  echo "Usage:"
  echo "  $0 create <name> <url>"
  echo "  $0 delete <name>"
  exit 1
}

if [ "$#" -lt 2 ]; then
  usage
fi

ACTION="$1"
NAME="$2"
DESKTOP_DIR="$HOME/.local/share/applications"
DESKTOP_FILE="$DESKTOP_DIR/pwa-${NAME}.desktop"
ICON_DIR="$HOME/.local/share/icons"
ICON_FILE="$ICON_DIR/pwa-${NAME}.ico"
PNG_ICON_FILE="$ICON_DIR/pwa-${NAME}.png"

fetch_favicon() {
  URL="$1"
  mkdir -p "$ICON_DIR"
  FAVICON_URL="${URL}/favicon.ico"
  if curl -fsSL -A "Mozilla/5.0" "$FAVICON_URL" -o "$ICON_FILE"; then
    if command -v convert >/dev/null 2>&1; then
      if magick "$ICON_FILE[-1]" "$PNG_ICON_FILE"; then
        echo "$PNG_ICON_FILE"
      else
        echo ""
      fi
    else
      echo "$ICON_FILE"
    fi
  else
    echo ""
  fi
}

case "$ACTION" in
  create)
    if [ "$#" -lt 3 ]; then
      usage
    fi
    URL="$3"
    if [ "$#" -ge 4 ]; then
      ICON_PATH="$4"
    else
        ICON_PATH=$(fetch_favicon "$URL")
        if [ -z "$ICON_PATH" ]; then
          ICON_BASENAME="web-browser"
        else
          ICON_BASENAME="$ICON_PATH"
        fi
    fi
    mkdir -p "$DESKTOP_DIR"
      cat > "$DESKTOP_FILE" <<EOF
[Desktop Entry]
Version=1.0
Type=Application
Name=$NAME
Exec=chromium --app=$URL
Icon=$ICON_BASENAME
Terminal=false
Categories=Network;WebBrowser;
EOF
    chmod +x "$DESKTOP_FILE"
    echo "Created desktop entry: $DESKTOP_FILE"
    ;;
  delete)
    if [ -f "$DESKTOP_FILE" ]; then
      rm "$DESKTOP_FILE"
      echo "Deleted desktop entry: $DESKTOP_FILE"
    else
      echo "Desktop entry not found: $DESKTOP_FILE"
    fi
    if [ -f "$ICON_FILE" ]; then
      rm "$ICON_FILE"
      echo "Deleted icon file: $ICON_FILE"
    fi
    ;;
  *)
    usage
    ;;
esac