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

# Cross-build Windows distribution on Linux
# Usage: ./build-dist-windows.sh [VERSION]

# --- 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[^"]+' \
      media_server/__init__.py 2>/dev/null || echo "0.0.0")
fi

VERSION_CLEAN="${VERSION#v}"
echo "Building Media Server v${VERSION_CLEAN} for Windows"

# --- Configuration ---
PYTHON_VERSION="3.11.9"
PYTHON_SHORT="311"
DIST_DIR="dist/media-server"
WHEEL_DIR="build/win-wheels"
SITE_PACKAGES="${DIST_DIR}/python/Lib/site-packages"
BUILD_OUTPUT="build/MediaServer-v${VERSION_CLEAN}-win-x64"

rm -rf dist build
mkdir -p "${DIST_DIR}" "${WHEEL_DIR}" "${SITE_PACKAGES}"

# --- Download embedded Python ---
echo "Downloading embedded Python ${PYTHON_VERSION}..."
curl -sL "https://www.python.org/ftp/python/${PYTHON_VERSION}/python-${PYTHON_VERSION}-embed-amd64.zip" \
    -o build/python-embed.zip
unzip -qo build/python-embed.zip -d "${DIST_DIR}/python"

# Patch ._pth to enable site-packages and app source
PTH_FILE=$(ls "${DIST_DIR}"/python/python*._pth | head -1)
sed -i 's/^#\s*import site/import site/' "$PTH_FILE"
echo 'Lib\site-packages' >> "$PTH_FILE"
echo '..\..\app' >> "$PTH_FILE"

# --- Download Windows wheels ---
echo "Downloading Windows wheels..."

# Core dependencies
CORE_DEPS=(
    "fastapi>=0.109.0"
    "uvicorn[standard]>=0.27.0"
    "pydantic>=2.0"
    "pydantic-settings>=2.0"
    "pyyaml>=6.0"
    "mutagen>=1.47.0"
    "pillow>=10.0.0"
)

# Windows-specific dependencies
WIN_DEPS=(
    "winsdk>=1.0.0b10"
    "pywin32>=306"
    "comtypes>=1.2.0"
    "pycaw>=20230407"
    "screen-brightness-control>=0.20.0"
    "monitorcontrol>=3.0.0"
)

# Visualizer dependencies
VIS_DEPS=(
    "soundcard>=0.4.0"
    "numpy>=1.24.0"
)

ALL_DEPS=("${CORE_DEPS[@]}" "${WIN_DEPS[@]}" "${VIS_DEPS[@]}")

for dep in "${ALL_DEPS[@]}"; do
    pip download --quiet --dest "$WHEEL_DIR" \
        --platform win_amd64 --python-version "${PYTHON_SHORT}" \
        --implementation cp --only-binary :all: \
        "$dep" 2>/dev/null || \
    pip download --quiet --dest "$WHEEL_DIR" "$dep"
done

# Install wheels into site-packages
echo "Installing wheels..."
for whl in "$WHEEL_DIR"/*.whl; do
    unzip -qo "$whl" -d "$SITE_PACKAGES"
done

# --- Size optimization ---
echo "Optimizing size..."
find "$SITE_PACKAGES" -type d -name __pycache__ -exec rm -rf {} + 2>/dev/null || true
find "$SITE_PACKAGES" -type d -name tests -exec rm -rf {} + 2>/dev/null || true
find "$SITE_PACKAGES" -type d -name "*.dist-info" -exec rm -rf {} + 2>/dev/null || true
find "$SITE_PACKAGES" -name "*.pyi" -delete 2>/dev/null || true
rm -rf "$SITE_PACKAGES"/{pip,setuptools,pkg_resources}* 2>/dev/null || true

# Trim numpy if present
rm -rf "$SITE_PACKAGES"/numpy/{tests,f2py,typing} 2>/dev/null || true

# --- Verify frontend bundle ---
if [ ! -f "media_server/static/dist/app.bundle.js" ]; then
    echo "ERROR: Frontend bundle not found. Run 'npm ci && npm run build' first."
    exit 1
fi

# --- Copy application ---
echo "Copying application files..."
mkdir -p "${DIST_DIR}/app"
cp -r media_server "${DIST_DIR}/app/"

# Remove source JS (bundle is in dist/)
rm -rf "${DIST_DIR}/app/media_server/static/js"
# Remove source maps from release
rm -f "${DIST_DIR}/app/media_server/static/dist/"*.map

# Copy config example
cp config.example.yaml "${DIST_DIR}/"

# Copy scripts needed for auto-start
mkdir -p "${DIST_DIR}/scripts"
cp scripts/start-hidden.vbs "${DIST_DIR}/scripts/"

# --- Write version ---
echo "$VERSION_CLEAN" > "${DIST_DIR}/VERSION"

# --- Create launcher ---
cat > "${DIST_DIR}/media-server.bat" << 'LAUNCHER'
@echo off
setlocal
set "ROOT=%~dp0"
"%ROOT%python\python.exe" -m media_server.main %*
LAUNCHER

# --- Package ---
echo "Creating archives..."
mkdir -p build

# Portable ZIP
cp -r "${DIST_DIR}" "${BUILD_OUTPUT}"
cd build
zip -qr "MediaServer-v${VERSION_CLEAN}-win-x64.zip" "MediaServer-v${VERSION_CLEAN}-win-x64"
cd ..

echo "Build complete: build/MediaServer-v${VERSION_CLEAN}-win-x64.zip"
echo "Dist directory ready for NSIS: ${DIST_DIR}"