#!/bin/bash
#
# Build script for Lightning Monitor Venus OS package
#
# Usage:
#   ./build-package.sh
#   ./build-package.sh --version 1.0.0
#
# Installation on Venus OS:
#   scp dbus-lightning-*.tar.gz root@<device-ip>:/data/
#   ssh root@<device-ip>
#   cd /data && tar -xzf dbus-lightning-*.tar.gz
#   bash /data/dbus-lightning/install.sh
#

set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

VERSION="1.0.0"
OUTPUT_DIR="$SCRIPT_DIR"
PACKAGE_NAME="dbus-lightning"

while [[ $# -gt 0 ]]; do
    case $1 in
        --version|-v)
            VERSION="$2"
            shift 2
            ;;
        --output|-o)
            OUTPUT_DIR="$2"
            shift 2
            ;;
        --help|-h)
            echo "Usage: $0 [OPTIONS]"
            echo ""
            echo "Options:"
            echo "  -v, --version VERSION   Set package version (default: 1.0.0)"
            echo "  -o, --output PATH       Output directory (default: script directory)"
            echo "  -h, --help              Show this help message"
            exit 0
            ;;
        *)
            echo "Unknown option: $1"
            exit 1
            ;;
    esac
done

BUILD_DATE=$(date -u +"%Y-%m-%d %H:%M:%S UTC")
BUILD_TIMESTAMP=$(date +%Y%m%d%H%M%S)

BUILD_DIR=$(mktemp -d)
PACKAGE_DIR="$BUILD_DIR/$PACKAGE_NAME"

echo "=================================================="
echo "Building $PACKAGE_NAME package"
echo "=================================================="
echo "Version:    $VERSION"
echo "Build date: $BUILD_DATE"
echo "Source:     $SCRIPT_DIR"
echo "Output:     $OUTPUT_DIR"
echo ""

echo "1. Creating package structure..."
mkdir -p "$PACKAGE_DIR"
mkdir -p "$PACKAGE_DIR/service/log"

[ "$(uname)" = "Darwin" ] && export COPYFILE_DISABLE=1

echo "2. Copying application files..."
cp "$SCRIPT_DIR/lightning.py" "$PACKAGE_DIR/"
cp "$SCRIPT_DIR/config.py" "$PACKAGE_DIR/"
cp "$SCRIPT_DIR/blitzortung_client.py" "$PACKAGE_DIR/"
cp "$SCRIPT_DIR/strike_buffer.py" "$PACKAGE_DIR/"
cp "$SCRIPT_DIR/analysis_engine.py" "$PACKAGE_DIR/"
if [ -f "$SCRIPT_DIR/../lib/signal_reader.py" ]; then
    cp "$SCRIPT_DIR/../lib/signal_reader.py" "$PACKAGE_DIR/"
    echo "   Bundled shared library: signal_reader.py"
fi

echo "3. Copying service files..."
cp "$SCRIPT_DIR/service/run" "$PACKAGE_DIR/service/"
cp "$SCRIPT_DIR/service/log/run" "$PACKAGE_DIR/service/log/"

echo "4. Copying installation scripts..."
cp "$SCRIPT_DIR/install.sh" "$PACKAGE_DIR/"
cp "$SCRIPT_DIR/uninstall.sh" "$PACKAGE_DIR/"

echo "5. Setting permissions..."
chmod +x "$PACKAGE_DIR/lightning.py"
chmod +x "$PACKAGE_DIR/install.sh"
chmod +x "$PACKAGE_DIR/uninstall.sh"
chmod +x "$PACKAGE_DIR/service/run"
chmod +x "$PACKAGE_DIR/service/log/run"

mkdir -p "$OUTPUT_DIR"

TARBALL_NAME="$PACKAGE_NAME-$VERSION.tar.gz"
OUTPUT_DIR_ABS="$(cd "$OUTPUT_DIR" && pwd)"
TARBALL_PATH="$OUTPUT_DIR_ABS/$TARBALL_NAME"

echo "6. Creating package archive..."
cd "$BUILD_DIR"
if [ "$(uname)" = "Darwin" ]; then
    if command -v xattr >/dev/null 2>&1; then
        xattr -cr "$PACKAGE_NAME"
    fi
fi
tar --format=ustar -czf "$TARBALL_PATH" "$PACKAGE_NAME"

if command -v sha256sum >/dev/null 2>&1; then
    CHECKSUM=$(sha256sum "$TARBALL_PATH" | cut -d' ' -f1)
else
    CHECKSUM=$(shasum -a 256 "$TARBALL_PATH" | cut -d' ' -f1)
fi
echo "$CHECKSUM  $TARBALL_NAME" > "$OUTPUT_DIR_ABS/$TARBALL_NAME.sha256"

echo "7. Cleaning up..."
rm -rf "$BUILD_DIR"

FILE_SIZE=$(du -h "$TARBALL_PATH" | cut -f1)

echo ""
echo "=================================================="
echo "Build complete!"
echo "=================================================="
echo ""
echo "Package:  $TARBALL_PATH"
echo "Size:     $FILE_SIZE"
echo "SHA256:   $CHECKSUM"
echo ""
echo "Installation on Venus OS:"
echo "  scp $TARBALL_PATH root@<device-ip>:/data/"
echo "  ssh root@<device-ip>"
echo "  cd /data"
echo "  tar -xzf $TARBALL_NAME"
echo "  bash /data/$PACKAGE_NAME/install.sh"
echo ""