#!/bin/bash

# Simple BBeOS Emulation Script
# Works without full kernel build

set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Logging functions
log_info() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

log_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

log_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

log_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# Check dependencies
check_dependencies() {
    log_info "Checking dependencies..."
    
    local missing_deps=()
    
    # Check QEMU
    if ! command -v qemu-system-arm &> /dev/null; then
        missing_deps+=("qemu-system-arm")
    fi
    
    if [ ${#missing_deps[@]} -ne 0 ]; then
        log_error "Missing dependencies: ${missing_deps[*]}"
        log_info "Install them with:"
        log_info "  sudo apt-get install ${missing_deps[*]}"
        log_info ""
        log_info "Or try the terminal emulation instead:"
        log_info "  ./scripts/emulate-terminal.sh"
        exit 1
    fi
    
    log_success "All dependencies found"
}

# Show BBeOS demo
show_demo() {
    log_info "Starting BBeOS Demo..."
    
    # Create a simple demo script
    cat > bbeos-demo.sh << 'EOF'
#!/bin/bash

echo "BBeOS Demo - BlackBerry Classic Q20 Operating System"
echo "===================================================="
echo ""
echo "This is a demonstration of BBeOS running in QEMU."
echo ""
echo "What you're seeing:"
echo "- ARM processor emulation"
echo "- Linux kernel booting"
echo "- BBeOS system running"
echo "- 720x720 square display simulation"
echo ""
echo "In a real BBeOS system, you would see:"
echo "- Home screen with 4x4 app grid"
echo "- Calculator, Text Editor, Settings apps"
echo "- Phone and SMS functionality"
echo "- Wi-Fi and Bluetooth support"
echo "- Physical keyboard navigation"
echo ""
echo "Press any key to continue..."
read -n 1
EOF

    chmod +x bbeos-demo.sh
    
    # Run the demo
    ./bbeos-demo.sh
}

# Start simple QEMU emulation
start_simple_emulation() {
    log_info "Starting simple BBeOS emulation..."
    
    # Check if we have a basic kernel
    if [ ! -f "kernel-source/arch/arm/boot/zImage" ]; then
        log_warning "Kernel not built yet. Starting demo mode..."
        show_demo
        
        log_info "To build the full system, run:"
        log_info "  ./scripts/build-kernel.sh"
        log_info "  ./scripts/build-rootfs.sh"
        log_info "  ./scripts/emulate-bbeos.sh setup"
        return
    fi
    
    # If we have the kernel, start QEMU
    log_info "Starting QEMU with BBeOS..."
    log_info "Press Ctrl+A, then X to exit"
    
    qemu-system-arm \
        -machine vexpress-a9 \
        -cpu cortex-a9 \
        -m 1G \
        -display gtk \
        -kernel kernel-source/arch/arm/boot/zImage \
        -dtb kernel-source/arch/arm/boot/dts/vexpress-v2p-ca9.dtb \
        -initrd initramfs.img \
        -serial stdio \
        -no-reboot \
        -no-shutdown \
        -append "console=ttyAMA0,115200 root=/dev/ram0 rw init=/init"
}

# Show help
show_help() {
    echo "Simple BBeOS Emulation"
    echo "====================="
    echo ""
    echo "This script provides a simple way to experience BBeOS."
    echo ""
    echo "Usage: $0 [OPTION]"
    echo ""
    echo "Options:"
    echo "  start    - Start BBeOS emulation/demo (default)"
    echo "  demo     - Show BBeOS demo"
    echo "  help     - Show this help"
    echo ""
    echo "If you don't have the kernel built yet, this will show a demo."
    echo "To build the full system, see the documentation."
    echo ""
}

# Main function
main() {
    case "${1:-start}" in
        "start")
            check_dependencies
            start_simple_emulation
            ;;
        "demo")
            show_demo
            ;;
        "help"|"-h"|"--help")
            show_help
            ;;
        *)
            log_error "Unknown option: $1"
            show_help
            exit 1
            ;;
    esac
}

# Run main function
main "$@"