#!/bin/bash

# Wrapper script for Debian Trixie ostree backport
# This script calls the main backport script with trixie as the target
# Options: --podman, --vm, --help

set -e

# Default values
USE_PODMAN=false
USE_VM=false
VM_NAME="ostree-trixie-test"
CONTAINER_NAME="ostree-trixie-backport"

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

# Function to show usage
show_usage() {
    echo -e "${BLUE}=== Debian Trixie (12) ostree Backport ===${NC}"
    echo ""
    echo "Usage: $0 [OPTIONS]"
    echo ""
    echo "Options:"
    echo "  --podman          Run in Podman container (recommended for testing)"
    echo "  --vm              Run in virsh VM (requires KVM/libvirt)"
    echo "  --help            Show this help message"
    echo ""
    echo "Examples:"
    echo "  $0                # Run directly on host (not recommended)"
    echo "  $0 --podman       # Run in isolated Podman container"
    echo "  $0 --vm           # Run in isolated VM"
    echo ""
    echo "Safety:"
    echo "  - Podman containers are isolated and safe"
    echo "  - VMs provide full isolation but require more resources"
    echo "  - Direct host execution may affect your system"
}

# Function to check if command exists
command_exists() {
    command -v "$1" >/dev/null 2>&1
}

# Function to create and run Podman container
run_in_podman() {
    echo -e "${BLUE}=== Setting up Podman container for Debian Trixie backport ===${NC}"
    
    if ! command_exists podman; then
        echo -e "${RED}Error: Podman is not installed. Please install podman first.${NC}"
        exit 1
    fi
    
    echo "Creating Debian Trixie container..."
    
    # Create container with necessary privileges
    podman run --rm -it \
        --name "$CONTAINER_NAME" \
        --privileged \
        --security-opt label=disable \
        -v "$(pwd):/workspace:Z" \
        -w /workspace \
        debian:testing \
        bash -c "
            echo '=== Setting up container environment ==='
            apt update -y
            apt install -y git curl wget sudo
            git clone https://git.raines.xyz/robojerk/libostree-dev.git /tmp/libostree-dev
            cp -r /tmp/libostree-dev/* /workspace/
            cp -r /tmp/libostree-dev/.* /workspace/ 2>/dev/null || true
            chmod +x /workspace/*.sh
            echo '=== Container ready, running backport ==='
            cd /workspace
            # Create a non-root user for running the script
            useradd -m -s /bin/bash backport-user
            # Don't change ownership of host files - only workspace content
            chown -R backport-user:backport-user /workspace/*.sh
            chown -R backport-user:backport-user /workspace/ostree-backport.sh
            echo 'backport-user ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
            # Create build directory inside container
            mkdir -p /home/backport-user/build
            chown -R backport-user:backport-user /home/backport-user
            su - backport-user -c 'cd /workspace && BACKPORT_DIR=/home/backport-user/build/ostree-backport-trixie ./ostree-backport.sh trixie'
            # Copy built packages to host builds directory
            echo '=== Copying built packages to host builds/ directory ==='
            mkdir -p /workspace/builds
            cp -r /home/backport-user/build/ostree-backport-trixie/*.deb /workspace/builds/ 2>/dev/null || echo 'No .deb files found'
            cp -r /home/backport-user/build/ostree-backport-trixie/*.dsc /workspace/builds/ 2>/dev/null || echo 'No .dsc files found'
            cp -r /home/backport-user/build/ostree-backport-trixie/*.tar.* /workspace/builds/ 2>/dev/null || echo 'No source tarballs found'
            echo '=== Build complete. Check builds/ directory for packages ==='
        "
}

# Function to create and run VM
run_in_vm() {
    echo -e "${BLUE}=== Setting up VM for Debian Trixie backport ===${NC}"
    
    if ! command_exists virsh; then
        echo -e "${RED}Error: virsh is not installed. Please install libvirt-clients first.${NC}"
        echo "On Bazzite, try: ujust install libvirt-clients"
        exit 1
    fi
    
    # Check for virt-install (may not be available on immutable distros)
    if ! command_exists virt-install; then
        echo -e "${YELLOW}Warning: virt-install not found. This is common on immutable distros like Bazzite.${NC}"
        echo ""
        echo "Alternative VM creation methods:"
        echo "1. Use virt-manager (Flatpak) - GUI interface"
        echo "2. Use virt-install via toolbox/distrobox"
        echo "3. Use Podman containers instead (recommended)"
        echo ""
        echo "For virt-manager (Flatpak):"
        echo "  flatpak run org.virt_manager.virt-manager"
        echo ""
        echo "For toolbox/distrobox with virt-install:"
        echo "  toolbox create --distro fedora"
        echo "  toolbox enter"
        echo "  sudo dnf install virt-install"
        echo ""
        echo "For Podman container (recommended):"
        echo "  $0 --podman"
        echo ""
        read -p "Would you like to try Podman container instead? (Y/n): " -n 1 -r
        echo
        if [[ ! $REPLY =~ ^[Nn]$ ]]; then
            echo "Switching to Podman container..."
            run_in_podman
            return
        else
            echo "Continuing with VM setup..."
        fi
    fi
    
    echo "Creating Debian Trixie VM..."
    
    # Check if VM already exists
    if virsh list --all --name | grep -q "$VM_NAME"; then
        echo -e "${YELLOW}VM $VM_NAME already exists. Starting it...${NC}"
        virsh start "$VM_NAME"
        virsh console "$VM_NAME"
    else
        echo "Creating new VM: $VM_NAME"
        
        # Try to create VM with virt-install if available
        if command_exists virt-install; then
            # Create VM with Debian Trixie
            virt-install \
                --name "$VM_NAME" \
                --memory 4096 \
                --vcpus 2 \
                --disk size=20 \
                --network default \
                --os-variant debian12 \
                --location http://deb.debian.org/debian/dists/bookworm/main/installer-amd64/ \
                --extra-args "console=ttyS0,115200n8 serial" \
                --graphics none \
                --noautoconsole
        else
            echo -e "${YELLOW}virt-install not available. Please create VM manually:${NC}"
            echo ""
            echo "1. Open virt-manager (Flatpak):"
            echo "   flatpak run org.virt_manager.virt-manager"
            echo ""
            echo "2. Create new VM with these settings:"
            echo "   - Name: $VM_NAME"
            echo "   - Memory: 4096 MB"
            echo "   - CPUs: 2"
            echo "   - Disk: 20 GB"
            echo "   - OS: Debian 12 (Bookworm)"
            echo "   - Network: Default"
            echo ""
            echo "3. Once VM is created and running, connect to it and run:"
            echo "   git clone https://git.raines.xyz/robojerk/libostree-dev.git"
            echo "   cd libostree-dev"
            echo "   ./backport-trixie.sh"
            echo ""
            echo "Alternatively, use Podman container:"
            echo "   $0 --podman"
            return
        fi
        
        echo -e "${GREEN}VM created successfully. You can connect to it with:${NC}"
        echo "virsh console $VM_NAME"
        echo ""
        echo "Once connected, run:"
        echo "git clone https://git.raines.xyz/robojerk/libostree-dev.git"
        echo "cd libostree-dev"
        echo "./backport-trixie.sh"
    fi
}

# Parse command line arguments
while [[ $# -gt 0 ]]; do
    case $1 in
        --podman)
            USE_PODMAN=true
            shift
            ;;
        --vm)
            USE_VM=true
            shift
            ;;
        --help|-h)
            show_usage
            exit 0
            ;;
        *)
            echo -e "${RED}Error: Unknown option $1${NC}"
            show_usage
            exit 1
            ;;
    esac
done

# Check for conflicting options
if [ "$USE_PODMAN" = true ] && [ "$USE_VM" = true ]; then
    echo -e "${RED}Error: Cannot use both --podman and --vm options${NC}"
    exit 1
fi

# Main execution logic
if [ "$USE_PODMAN" = true ]; then
    run_in_podman
elif [ "$USE_VM" = true ]; then
    run_in_vm
else
    echo -e "${YELLOW}=== Debian Trixie (12) ostree Backport ===${NC}"
    echo "Source: Debian sid"
    echo "Target: Debian Trixie"
    echo ""
    echo -e "${YELLOW}Warning: Running directly on host. Consider using --podman or --vm for safety.${NC}"
    echo ""
    read -p "Continue anyway? (y/N): " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        echo "Aborted. Use --podman or --vm for safe testing."
        exit 0
    fi
    
    # Call the main backport script with trixie as the target
    ./ostree-backport.sh trixie
fi