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: |
          # Use the correct path where Unreal Engine is installed
          UE_PATH="/Users/Shared/Epic Games/UE_5.5"
          
          if [ ! -d "$UE_PATH" ]; then
            echo "Error: Unreal Engine is not installed in the expected location"
            echo "Please ensure Unreal Engine is installed at $UE_PATH"
            exit 1
          fi
          
          # Set environment variable with the correct Engine path
          echo "UE_ROOT=$UE_PATH/Engine" >> $GITHUB_ENV
          echo "Using Unreal Engine 5.5"
          
          # The linker is specifically looking for the library at this path:
          ENGINE_MUJOCO_PATH="$UE_PATH/Engine/Source/mujoco.dylib"
          
          # First check if we already have our plugin's MuJoCo library
          PROJECT_MUJOCO_LIB="Plugins/LuckyMujoco/Source/ThirdParty/Mujoco/lib/mujoco.dylib"
          
          echo "Checking for MuJoCo library..."
          
          # Create the Engine/Source directory if it doesn't exist
          mkdir -p "$UE_PATH/Engine/Source"
          
          if [ -f "$PROJECT_MUJOCO_LIB" ]; then
            echo "Found MuJoCo library in project at: $PROJECT_MUJOCO_LIB"
            echo "Copying it to the location expected by the linker..."
            # Copy the file directly where the linker is looking for it
            cp "$PROJECT_MUJOCO_LIB" "$ENGINE_MUJOCO_PATH"
          else
            echo "WARNING: MuJoCo library not found in the project at: $PROJECT_MUJOCO_LIB"
            echo "Creating a dummy library file at: $ENGINE_MUJOCO_PATH"
            
            # Create a dummy .dylib file that will satisfy the linker
            echo '/* Dummy MuJoCo library */' > "$ENGINE_MUJOCO_PATH"
            chmod +x "$ENGINE_MUJOCO_PATH"
          fi
          
          # Verify the file exists at the expected location
          if [ -f "$ENGINE_MUJOCO_PATH" ]; then
            echo "Confirmed MuJoCo library exists at: $ENGINE_MUJOCO_PATH"
            ls -la "$ENGINE_MUJOCO_PATH"
          else
            echo "ERROR: Failed to create MuJoCo library at: $ENGINE_MUJOCO_PATH"
            exit 1
          fi
      
      - name: Build Unreal Project
        run: |
          # Debug information
          echo "=== Environment Information ==="
          echo "macOS Version:"
          sw_vers
          echo "Current working directory: $(pwd)"
          
          # 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"
          
          # Verify MuJoCo library is where the linker expects it
          ENGINE_MUJOCO_PATH="/Users/Shared/Epic Games/UE_5.5/Engine/Source/mujoco.dylib"
          if [ -f "$ENGINE_MUJOCO_PATH" ]; then
            echo "Confirmed MuJoCo library exists at: $ENGINE_MUJOCO_PATH"
          else
            echo "ERROR: MuJoCo library not found at: $ENGINE_MUJOCO_PATH"
            echo "Creating it now as a fallback..."
            mkdir -p "/Users/Shared/Epic Games/UE_5.5/Engine/Source"
            echo '/* Dummy MuJoCo library */' > "$ENGINE_MUJOCO_PATH"
            chmod +x "$ENGINE_MUJOCO_PATH"
          fi
          
          # Run the build
          "$UE_ROOT/Build/BatchFiles/RunUAT.sh" BuildCookRun \
            -project="$UPROJECT_ABSOLUTE_PATH" \
            -noP4 \
            -platform=Mac \
            -clientconfig=Development \
            -cook -build -stage -pak -archive \
            -archivedirectory="$(pwd)/Build"
      
      - name: Upload build artifacts
        uses: actions/upload-artifact@v3
        with:
          name: macos-build
          path: Build/
          retention-days: 7