#!/bin/bash

# High-Performance Android Emulator Launch Script
# Optimized for Linux systems with NVIDIA graphics cards
# Author: Matthew Raymer

echo "🚀 Launching Android Emulator with GPU Acceleration..."

# Check if emulator command exists
if ! command -v emulator &> /dev/null; then
    echo "❌ Error: Android emulator not found!"
    echo "Please install Android Studio and add emulator to PATH"
    echo "export PATH=\$PATH:\$ANDROID_HOME/emulator"
    exit 1
fi

# Check if AVD exists
if ! emulator -list-avds | grep -q "TimeSafari_Emulator"; then
    echo "❌ Error: TimeSafari_Emulator AVD not found!"
    echo "Available AVDs:"
    emulator -list-avds
    echo ""
    echo "Please create TimeSafari_Emulator AVD or modify this script"
    exit 1
fi

# Check if NVIDIA drivers are available
if ! ls /usr/share/vulkan/icd.d/nvidia_icd.json &> /dev/null; then
    echo "⚠️  Warning: NVIDIA Vulkan ICD not found"
    echo "GPU acceleration may not work optimally"
    echo "Consider installing NVIDIA drivers with Vulkan support"
fi

echo "✅ Environment checks passed"
echo "🎮 Starting emulator with GPU acceleration..."

# Launch emulator with GPU acceleration, network fixes, and performance tuning
QT_QPA_PLATFORM=xcb \
__NV_PRIME_RENDER_OFFLOAD=1 \
__GLX_VENDOR_LIBRARY_NAME=nvidia \
__VK_LAYER_NV_optimus=NVIDIA_only \
VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/nvidia_icd.json \
DRI_PRIME=1 \
emulator -avd TimeSafari_Emulator \
  -gpu host \
  -feature Vulkan \
  -accel on \
  -cores 6 \
  -memory 4096 \
  -no-boot-anim \
  -no-snapshot-load \
  -dns-server 8.8.8.8,1.1.1.1 \
  -feature -Bluetooth

echo "🎯 Emulator launched with GPU acceleration!"
echo ""
echo "📋 Performance Features Enabled:"
echo "  - Hardware GPU acceleration"
echo "  - Vulkan graphics API support"
echo "  - NVIDIA GPU offloading"
echo "  - 6 CPU cores allocated"
echo "  - 4GB RAM allocated"
echo "  - Fast startup (no boot animation)"
echo "  - Clean state (no snapshot loading)"
echo "  - Fixed DNS servers (8.8.8.8, 1.1.1.1)"
echo "  - Bluetooth disabled (prevents hangs)"
echo ""
echo "🔧 Troubleshooting:"
echo "  - If emulator is slow, check NVIDIA drivers"
echo "  - For Intel/AMD graphics, remove NVIDIA-specific variables"
echo "  - Monitor GPU usage with: nvidia-smi"
echo ""
echo "🔍 GPU Binding Issues:"
echo "  If OpenGL still binds to Intel iGPU instead of NVIDIA:"
echo "  1. Check emulator banner for 'OpenGL Vendor=Google (NVIDIA)'"
echo "  2. Try alternative GPU modes:"
echo "     - Pure OpenGL: Remove -feature Vulkan flag"
echo "     - ANGLE path: Use -gpu angle_indirect"
echo "     - Mesa fallback: Use -gpu mesa"
echo "  3. Verify dGPU usage: nvidia-smi dmon -s u"
echo ""
echo "📋 Performance Verification:"
echo "  - Monitor GPU utilization: watch -n1 'nvidia-smi --query-compute-apps=pid,process_name,used_memory --format=csv,noheader | grep qemu'"
echo "  - Check ADB connection: adb kill-server && adb start-server"
echo "  - Clean snapshots: Delete ~/.android/avd/TimeSafari_Emulator.avd/snapshots/"