#!/usr/bin/env bash
set -euo pipefail

# Build Linux distribution (self-contained venv + tarball)
# Usage: ./build-dist-linux.sh [VERSION]

source "$(dirname "$0")/build-common.sh"

detect_version "${1:-}"
echo "Building Media Server v${VERSION_CLEAN} for Linux"

# --- Configuration ---
DIST_DIR="dist/media-server"
BUILD_OUTPUT="build/MediaServer-v${VERSION_CLEAN}-linux-x64"

clean_dist "${DIST_DIR}" build
verify_frontend

# --- Create self-contained virtualenv ---
echo "Creating virtualenv..."
python3 -m venv "${DIST_DIR}/venv"
source "${DIST_DIR}/venv/bin/activate"
pip install --quiet --upgrade pip
pip install --quiet "."

# Remove the installed package (app source is on PYTHONPATH via launcher)
rm -rf "${DIST_DIR}"/venv/lib/python*/site-packages/media_server*
rm -rf "${DIST_DIR}"/venv/lib/python*/site-packages/media_server*.dist-info

deactivate

# Trim venv site-packages
LINUX_SP=$(echo "${DIST_DIR}"/venv/lib/python*/site-packages)
cleanup_site_packages "$LINUX_SP" "so" "so"

copy_app_files "$DIST_DIR"

# --- Create launcher ---
cat > "${DIST_DIR}/media-server.sh" << 'LAUNCHER'
#!/usr/bin/env bash
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
export PYTHONPATH="$SCRIPT_DIR/app"
source "$SCRIPT_DIR/venv/bin/activate"
exec python -m media_server.main "$@"
LAUNCHER
chmod +x "${DIST_DIR}/media-server.sh"

# --- Create systemd service installer ---
cat > "${DIST_DIR}/install-service.sh" << 'SERVICE'
#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SERVICE_NAME="media-server"
SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"

if [ "$EUID" -ne 0 ]; then
    echo "Please run with sudo: sudo ./install-service.sh"
    exit 1
fi

REAL_USER="${SUDO_USER:-$USER}"

cat > "$SERVICE_FILE" << EOF
[Unit]
Description=Media Server
After=network.target sound.target

[Service]
Type=simple
User=${REAL_USER}
WorkingDirectory=${SCRIPT_DIR}
ExecStart=${SCRIPT_DIR}/media-server.sh
Restart=on-failure
RestartSec=5
Environment=PYTHONUNBUFFERED=1

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable "${SERVICE_NAME}"
systemctl start "${SERVICE_NAME}"
echo "Service '${SERVICE_NAME}' installed and started."
echo "Check status: systemctl status ${SERVICE_NAME}"
SERVICE
chmod +x "${DIST_DIR}/install-service.sh"

# --- Package ---
echo "Creating archive..."
cp -r "${DIST_DIR}" "${BUILD_OUTPUT}"
tar -czf "${BUILD_OUTPUT}.tar.gz" -C build "MediaServer-v${VERSION_CLEAN}-linux-x64"

echo "Build complete: ${BUILD_OUTPUT}.tar.gz"