#!/bin/bash

# MPVJ Build Script
# Runs on x86_64 (e.g., Docker) to cross-compile artifacts for aarch64 (RPi 3B).
# Outputs (committed back to the repo):
#   frontend/dist/       — pre-built Vite bundle
#   bin/ofxPiMapper      — aarch64 binary
#
# Usage:
#   bash build.sh <REPO_URL>          # clones repo into ./mapper, then builds
#   bash build.sh <REPO_URL> <DIR>    # clones into DIR, then builds

set -e

REPO_URL="${1:-}"
REPO_DIR="${2:-$(pwd)/mapper}"
BIN_OUT="$REPO_DIR/bin"

if [ -z "$REPO_URL" ]; then
  echo "Usage: bash $0 <REPO_URL> [CLONE_DIR]"
  exit 1
fi

# ── Clone repo if needed ─────────────────────────────────────────────────────
if [ ! -d "$REPO_DIR/frontend" ] || [ ! -d "$REPO_DIR/backend" ]; then
  echo "Cloning $REPO_URL into $REPO_DIR ..."
  git clone "$REPO_URL" "$REPO_DIR"
fi
echo "Building from: $REPO_DIR"

# ── 1. Install build dependencies ───────────────────────────────────────────
echo "Installing build dependencies..."
if command -v apt-get > /dev/null 2>&1; then
  apt-get update -y
  DEBIAN_FRONTEND=noninteractive apt-get install -y \
    git curl wget unzip build-essential \
    gcc-aarch64-linux-gnu g++-aarch64-linux-gnu \
    binutils-aarch64-linux-gnu \
    libmpg123-dev libsndfile1-dev libopenal-dev libassimp-dev \
    libglew-dev libglfw3-dev liburiparser-dev \
    libcurl4-openssl-dev libpugixml-dev libasound2-dev \
    libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
    gstreamer1.0-plugins-good gstreamer1.0-plugins-bad \
    gstreamer1.0-plugins-ugly gstreamer1.0-libav \
    libgtk-3-dev libboost-filesystem-dev \
    libfontconfig1-dev libfreetype-dev libx11-dev \
    libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev \
    libpulse-dev libudev-dev libfreeimage-dev librtaudio-dev \
    freeglut3-dev libxxf86vm-dev
fi

# Install Node.js if missing
if ! command -v node > /dev/null 2>&1; then
  echo "Installing Node.js 20..."
  curl -fsSL https://deb.nodesource.com/setup_20.x | bash -
  apt-get install -y nodejs
fi

# ── 2. Build frontend ────────────────────────────────────────────────────────
echo ""
echo "=== Building frontend ==="
cd "$REPO_DIR/frontend"
rm -rf node_modules package-lock.json
npm install --package-lock=false
NODE_OPTIONS="--max-old-space-size=512" npm run build
echo "Frontend built → $REPO_DIR/frontend/dist/"

# ── 3. Commit and push frontend artifact back to repo ───────────────────────
echo ""
echo "=== Pushing frontend/dist to remote ==="
cd "$REPO_DIR"
git config user.email "build-bot@mpvj" 2>/dev/null || true
git config user.name  "MPVJ Build Bot"  2>/dev/null || true
git add frontend/dist/
git commit -m "ci: add pre-built frontend/dist" || echo "(nothing new to commit)"
git push

echo ""
echo "============================================"
echo " BUILD COMPLETE + PUSHED"
echo "============================================"
echo " Frontend: $REPO_DIR/frontend/dist/"
echo ""
echo " ofxPiMapper will be compiled natively on"
echo " the Pi when you run setup.sh."
echo "============================================"