#!/bin/bash
# Football ISO Test Script
# Boots QEMU VM from ISO to test installation
# All work done in Docker container

set -euo pipefail

BUILD_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ISO_PATH="$BUILD_DIR/output/football-installer.iso"
DISK_PATH="$BUILD_DIR/output/test-vm-disk.qcow2"
CONSOLE_LOG="$BUILD_DIR/output/vm-console.log"
VM_PID_FILE="$BUILD_DIR/output/vm.pid"

echo "================================================"
echo "Football ISO Test - VM Boot"
echo "================================================"
echo ""

# ============================================================================
# Step 1: Verify ISO Exists
# ============================================================================

echo "[1/4] Verifying ISO..."

if [ ! -f "$ISO_PATH" ]; then
    echo "❌ ISO not found: $ISO_PATH"
    echo "Run ./build-iso.sh first"
    exit 1
fi

docker run --rm \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c "
        echo 'ISO information:'
        file /build/output/football-installer.iso
        echo ''
        echo 'ISO size:'
        ls -lh /build/output/football-installer.iso
    "

echo ""
echo "✅ ISO verified"
echo ""

# ============================================================================
# Step 2: Create Test Disk
# ============================================================================

echo "[2/4] Creating test disk..."

mkdir -p "$BUILD_DIR/output"

docker run --rm \
    -v "$BUILD_DIR:/build" \
    debian:trixie \
    bash -c '
        set -e
        echo "Installing qemu-utils..."
        apt-get update -qq
        apt-get install -y -qq qemu-utils

        echo ""
        echo "Creating 16GB QCOW2 disk..."
        cd /build/output
        qemu-img create -f qcow2 test-vm-disk.qcow2 16G

        echo ""
        echo "✅ Test disk created"
        ls -lh /build/output/test-vm-disk.qcow2
    '

echo ""
echo "✅ Step 2 complete"
echo ""

# ============================================================================
# Step 3: Boot VM from ISO
# ============================================================================

echo "[3/4] Booting VM from ISO..."
echo ""
echo "VM Configuration:"
echo "  CPU: 2 cores"
echo "  RAM: 2GB"
echo "  Disk: 16GB"
echo "  Boot: $ISO_PATH"
echo ""
echo "NOTE: VM will boot in background mode"
echo "Console output will be saved to: $CONSOLE_LOG"
echo "To monitor console: tail -f $CONSOLE_LOG"
echo ""

# Start VM with QEMU using screen session
# Using screen to manage long-running QEMU process
screen -dmS football-iso-test \
    qemu-system-x86_64 \
    -m 2048 \
    -smp 2 \
    -drive file="$DISK_PATH",format=qcow2 \
    -drive file="$ISO_PATH",media=cdrom,readonly=on \
    -boot d \
    -nographic \
    -serial file:"$CONSOLE_LOG" \
    -display none

# Save QEMU PID for later use
pgrep -f "qemu-system-x86_64.*$DISK_PATH" | head -1 > "$VM_PID_FILE"

echo "✅ VM started (PID: $(cat "$VM_PID_FILE" 2>/dev/null || echo 'unknown'))"
echo ""

# ============================================================================
# Step 4: Monitor Boot
# ============================================================================

echo "[4/4] Monitoring boot (waiting 120 seconds)..."
echo ""

for _ in {1..120}; do
    if [ -f "$CONSOLE_LOG" ]; then
        # Check for installation prompts
        if grep -q "Choose the country" "$CONSOLE_LOG" 2>/dev/null; then
            echo "🟢 Installer running - Country selection detected"
            break
        fi

        # Check for errors
        if grep -qi "error\|panic\|fatal" "$CONSOLE_LOG" 2>/dev/null; then
            echo "⚠️  Error detected in console"
            tail -20 "$CONSOLE_LOG"
            break
        fi
    fi

    sleep 1
done

echo ""
echo "==========================================="
echo "VM Status"
echo "==========================================="
echo ""

if [ -f "$VM_PID_FILE" ]; then
    VM_PID=$(cat "$VM_PID_FILE" 2>/dev/null || echo 'unknown')
    if kill -0 "$VM_PID" 2>/dev/null; then
        echo "🟢 VM is running (PID: $VM_PID)"
    else
        echo "🔴 VM has stopped"
    fi
fi

echo ""
echo "Recent console output (last 30 lines):"
if [ -f "$CONSOLE_LOG" ]; then
    tail -30 "$CONSOLE_LOG"
else
    echo "No console output yet"
fi

echo ""
echo "==========================================="
echo "Manual Access"
echo "==========================================="
echo ""
echo "To access VM console interactively:"
echo "  1. Stop current VM: kill \$(cat $VM_PID_FILE)"
echo "  2. Remove -nographic flag:"
echo "     qemu-system-x86_64 \\"
echo "       -m 4096 -smp 2 \\"
echo "       -drive file=$DISK_PATH,format=qcow2 \\"
echo "       -drive file=$ISO_PATH,media=cdrom,readonly=on \\"
echo "       -boot d"
echo ""
echo "To stop VM:"
echo "  kill \$(cat $VM_PID_FILE)"
echo ""
echo "Console log location: $CONSOLE_LOG"
echo ""