#!/usr/bin/env bash
#
# Build a portable Linux distribution of LedGrab.
# Produces a self-contained tarball with virtualenv and launcher script.
#
# Usage:
#   ./build-dist.sh [VERSION]
#   ./build-dist.sh v0.1.0-alpha.1

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
BUILD_DIR="$SCRIPT_DIR/build"
DIST_NAME="LedGrab"
DIST_DIR="$BUILD_DIR/$DIST_NAME"
SERVER_DIR="$SCRIPT_DIR/server"
VENV_DIR="$DIST_DIR/venv"
APP_DIR="$DIST_DIR/app"

# ── Version detection ────────────────────────────────────────

VERSION="${1:-}"

if [ -z "$VERSION" ]; then
    VERSION=$(git describe --tags --exact-match 2>/dev/null || true)
fi
if [ -z "$VERSION" ]; then
    VERSION="${GITEA_REF_NAME:-${GITHUB_REF_NAME:-}}"
fi
if [ -z "$VERSION" ]; then
    VERSION=$(grep -oP '__version__\s*=\s*"\K[^"]+' "$SERVER_DIR/src/wled_controller/__init__.py" 2>/dev/null || echo "0.0.0")
fi

VERSION_CLEAN="${VERSION#v}"
TAR_NAME="LedGrab-v${VERSION_CLEAN}-linux-x64.tar.gz"

echo "=== Building LedGrab v${VERSION_CLEAN} (Linux) ==="
echo "  Output: build/$TAR_NAME"
echo ""

# ── Clean ────────────────────────────────────────────────────

if [ -d "$DIST_DIR" ]; then
    echo "[1/7] Cleaning previous build..."
    rm -rf "$DIST_DIR"
fi
mkdir -p "$DIST_DIR"

# ── Create virtualenv ────────────────────────────────────────

echo "[2/7] Creating virtualenv..."
python3 -m venv "$VENV_DIR"
source "$VENV_DIR/bin/activate"
pip install --upgrade pip --quiet

# ── Install dependencies ─────────────────────────────────────

echo "[3/7] Installing dependencies..."
pip install --quiet "${SERVER_DIR}[camera,notifications]" 2>&1 | {
    grep -i 'error\|failed' || true
}

# Remove the installed wled_controller package (PYTHONPATH handles app code)
SITE_PACKAGES="$VENV_DIR/lib/python*/site-packages"
rm -rf $SITE_PACKAGES/wled_controller* $SITE_PACKAGES/wled*.dist-info 2>/dev/null || true

# Clean up caches
find "$VENV_DIR" -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true
find "$VENV_DIR" -type d -name tests -exec rm -rf {} + 2>/dev/null || true
find "$VENV_DIR" -type d -name test -exec rm -rf {} + 2>/dev/null || true

# ── Build frontend ───────────────────────────────────────────

echo "[4/7] Building frontend bundle..."
(cd "$SERVER_DIR" && npm ci --loglevel error && npm run build) 2>&1 | {
    grep -v 'RemoteException' || true
}

# ── Copy application files ───────────────────────────────────

echo "[5/7] Copying application files..."
mkdir -p "$APP_DIR"

cp -r "$SERVER_DIR/src" "$APP_DIR/src"
cp -r "$SERVER_DIR/config" "$APP_DIR/config"
mkdir -p "$DIST_DIR/data" "$DIST_DIR/logs"

# Clean up source maps and __pycache__
find "$APP_DIR" -name "*.map" -delete 2>/dev/null || true
find "$APP_DIR" -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true

# ── Create launcher ──────────────────────────────────────────

echo "[6/7] Creating launcher..."
cat > "$DIST_DIR/run.sh" << 'LAUNCHER'
#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"

export PYTHONPATH="$SCRIPT_DIR/app/src"
export WLED_CONFIG_PATH="$SCRIPT_DIR/app/config/default_config.yaml"

mkdir -p "$SCRIPT_DIR/data" "$SCRIPT_DIR/logs"

echo ""
echo "  ============================================="
echo "   LedGrab vVERSION_PLACEHOLDER"
echo "   Open http://localhost:8080 in your browser"
echo "  ============================================="
echo ""

source "$SCRIPT_DIR/venv/bin/activate"
exec python -m uvicorn wled_controller.main:app --host 0.0.0.0 --port 8080
LAUNCHER

sed -i "s/VERSION_PLACEHOLDER/${VERSION_CLEAN}/" "$DIST_DIR/run.sh"
chmod +x "$DIST_DIR/run.sh"

# ── Create tarball ───────────────────────────────────────────

echo "[7/7] Creating $TAR_NAME..."
deactivate 2>/dev/null || true

TAR_PATH="$BUILD_DIR/$TAR_NAME"
(cd "$BUILD_DIR" && tar -czf "$TAR_NAME" "$DIST_NAME")

TAR_SIZE=$(du -h "$TAR_PATH" | cut -f1)
echo ""
echo "=== Build complete ==="
echo "  Archive: $TAR_PATH"
echo "  Size: $TAR_SIZE"
echo ""