#!/bin/sh

set -eu

SCRIPT_DIR=$(CDPATH= cd -- "$(dirname "$0")" && pwd)
REPO_ROOT=$(CDPATH= cd -- "$SCRIPT_DIR/.." && pwd)

SOURCE_ICON="$REPO_ROOT/src-tauri/icons/icon.png"
ANDROID_OVERLAY_DIR="$REPO_ROOT/src-tauri/android-overlay"
ANDROID_APP_DIR="$REPO_ROOT/src-tauri/gen/android/app"
ANDROID_RES_DIR="$ANDROID_APP_DIR/src/main/res"

if [ ! -f "$SOURCE_ICON" ]; then
  echo "Missing source icon: $SOURCE_ICON" >&2
  exit 1
fi

if [ ! -d "$ANDROID_OVERLAY_DIR" ]; then
  echo "Missing Android overlay directory: $ANDROID_OVERLAY_DIR" >&2
  exit 1
fi

if [ ! -d "$ANDROID_RES_DIR" ]; then
  echo "Missing Android resources directory: $ANDROID_RES_DIR" >&2
  echo "Run android init first." >&2
  exit 1
fi

resize_icon() {
  size="$1"
  output="$2"
  sips -z "$size" "$size" "$SOURCE_ICON" --out "$output" >/dev/null
}

for spec in \
  "48 mipmap-mdpi" \
  "72 mipmap-hdpi" \
  "96 mipmap-xhdpi" \
  "144 mipmap-xxhdpi" \
  "192 mipmap-xxxhdpi"
do
  set -- $spec
  resize_icon "$1" "$ANDROID_RES_DIR/$2/ic_launcher.png"
  resize_icon "$1" "$ANDROID_RES_DIR/$2/ic_launcher_round.png"
done

for spec in \
  "108 mipmap-mdpi" \
  "162 mipmap-hdpi" \
  "216 mipmap-xhdpi" \
  "324 mipmap-xxhdpi" \
  "432 mipmap-xxxhdpi"
do
  set -- $spec
  resize_icon "$1" "$ANDROID_RES_DIR/$2/ic_launcher_foreground.png"
done

find "$ANDROID_OVERLAY_DIR" -type f | while IFS= read -r overlay_file; do
  relative_path=${overlay_file#"$ANDROID_OVERLAY_DIR/"}
  destination="$REPO_ROOT/src-tauri/gen/android/$relative_path"
  mkdir -p "$(dirname "$destination")"
  cp "$overlay_file" "$destination"
done