name: Unreal Engine Build

on:
  workflow_dispatch:
  push:
    branches: [main, develop]

jobs:
  # windows-build:
  #   runs-on: windows
  #   steps:
  #     - name: Checkout repository
  #       uses: actions/checkout@v3
  #       with:
  #         lfs: true
  #         fetch-depth: 0

  #     - name: Setup Unreal Engine
  #       run: |
  #         # Ensure Unreal Engine is installed and set up
  #         # This assumes you have Unreal Engine installed on your runner
  #         # If not, you can add installation steps here

  #         # Set environment variables for Unreal Engine
  #         echo "UE_ROOT=C:\Program Files\Epic Games\UE_5.2" >> $GITHUB_ENV

  #     - name: Build Unreal Project
  #       run: |
  #         # Find your .uproject file (adjust path as needed)
  #         $UPROJECT_PATH = Get-ChildItem -Path . -Filter "*.uproject" -Recurse | Select-Object -First 1 -ExpandProperty FullName
  #         Write-Host "Building project: $UPROJECT_PATH"

  #         # Use Unreal Automation Tool to build the project
  #         & "$env:UE_ROOT\Engine\Build\BatchFiles\RunUAT.bat" BuildCookRun `
  #           -project="$UPROJECT_PATH" `
  #           -noP4 `
  #           -platform=Win64 `
  #           -clientconfig=Development `
  #           -cook -build -stage -pak -archive `
  #           -archivedirectory="$PWD\Build"

  #     - name: Upload build artifacts
  #       uses: actions/upload-artifact@v3
  #       with:
  #         name: windows-build
  #         path: Build/
  #         retention-days: 7

  macos-build:
    runs-on: macos
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          lfs: true
          fetch-depth: 0

      - name: Setup Unreal Engine
        timeout-minutes: 5 # Add timeout to prevent hanging
        run: |
          # Set environment variable with the correct Engine path
          UE_PATH="/Users/Shared/Epic Games/UE_5.5"
          echo "UE_ROOT=$UE_PATH/Engine" >> $GITHUB_ENV
          echo "Using Unreal Engine path: $UE_PATH"
          
          # Prepare MuJoCo dummy library in local project
          echo "Creating local MuJoCo library..."
          PROJECT_MUJOCO_DIR="Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib"
          mkdir -p "$PROJECT_MUJOCO_DIR"
          PROJECT_MUJOCO_PATH="$PROJECT_MUJOCO_DIR/mujoco.dylib"
          
          echo "/* Dummy MuJoCo library */" > "$PROJECT_MUJOCO_PATH"
          chmod +x "$PROJECT_MUJOCO_PATH"
          echo "Created local MuJoCo library at: $(pwd)/$PROJECT_MUJOCO_PATH"
          ls -la "$PROJECT_MUJOCO_PATH"
          
          # Create fallback in /tmp (which we should have access to)
          echo "Creating fallback library in /tmp..."
          echo "/* Dummy MuJoCo library */" > /tmp/mujoco.dylib
          chmod +x /tmp/mujoco.dylib
          echo "Created fallback MuJoCo library at: /tmp/mujoco.dylib"
          ls -la /tmp/mujoco.dylib
          
          # Set environment variables for the build process
          echo "DYLD_LIBRARY_PATH=/tmp:$(pwd)/$PROJECT_MUJOCO_DIR:$DYLD_LIBRARY_PATH" >> $GITHUB_ENV
          echo "LD_LIBRARY_PATH=/tmp:$(pwd)/$PROJECT_MUJOCO_DIR:$LD_LIBRARY_PATH" >> $GITHUB_ENV
          echo "Environment variables set for library paths"

      - name: Build Unreal Project
        run: |
          # Debug information
          echo "=== Environment Information ==="
          echo "macOS Version:"
          sw_vers
          echo "Current working directory: $(pwd)"
          echo "DYLD_LIBRARY_PATH: $DYLD_LIBRARY_PATH"
          echo "LD_LIBRARY_PATH: $LD_LIBRARY_PATH"
          
          # Find the project file
          UPROJECT_PATH=$(find . -name "*.uproject" -type f | head -1)
          if [ -z "$UPROJECT_PATH" ]; then
            echo "Error: Could not find .uproject file"
            exit 1
          fi
          
          # Get absolute path
          UPROJECT_ABSOLUTE_PATH=$(realpath "$UPROJECT_PATH")
          echo "Project path: $UPROJECT_ABSOLUTE_PATH"
          
          # Ensure the MuJoCo library is in place
          PROJECT_MUJOCO_DIR="Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib"
          PROJECT_MUJOCO_PATH="$PROJECT_MUJOCO_DIR/mujoco.dylib"
          
          if [ ! -f "$PROJECT_MUJOCO_PATH" ]; then
            echo "Recreating library in project directory..."
            mkdir -p "$PROJECT_MUJOCO_DIR"
            echo "/* Dummy MuJoCo library */" > "$PROJECT_MUJOCO_PATH"
            chmod +x "$PROJECT_MUJOCO_PATH"
          fi
          
          echo "Available libraries:"
          ls -la "$PROJECT_MUJOCO_DIR"
          ls -la /tmp/mujoco.dylib 2>/dev/null || echo "No library in /tmp"
          
          # Set up environment explicitly for this command
          export DYLD_LIBRARY_PATH="/tmp:$(pwd)/$PROJECT_MUJOCO_DIR:$DYLD_LIBRARY_PATH"
          export LD_LIBRARY_PATH="/tmp:$(pwd)/$PROJECT_MUJOCO_DIR:$LD_LIBRARY_PATH"
          
          echo "=== Starting build process ==="
          # Run the build with all environment variables set
          "$UE_ROOT/Build/BatchFiles/RunUAT.sh" BuildCookRun \
            -project="$UPROJECT_ABSOLUTE_PATH" \
            -noP4 \
            -platform=Mac \
            -clientconfig=Development \
            -cook -build -stage -pak -archive \
            -archivedirectory="$(pwd)/Build" || {
              echo "Build failed with status: $?"
              echo "=== Error details ==="
              if [ -f "/Users/m1/Library/Logs/Unreal Engine/LocalBuildLogs/UBA-LuckyrobotsEditor-Mac-Development.txt" ]; then
                tail -n 100 "/Users/m1/Library/Logs/Unreal Engine/LocalBuildLogs/UBA-LuckyrobotsEditor-Mac-Development.txt"
              fi
              exit 1
            }

      - name: Upload build artifacts
        uses: actions/upload-artifact@v3
        with:
          name: macos-build
          path: Build/
          retention-days: 7