#!/bin/bash

# Android Emulator Network Verification Script
# Diagnoses network connectivity issues that cause ANRs and Play Services failures
# Author: Matthew Raymer

echo "🔍 Android Emulator Network Verification"
echo "========================================"
echo ""

# Check if emulator is running
if ! adb devices | grep -q "emulator.*device"; then
    echo "❌ Error: No emulator detected!"
    echo "Please start an emulator first"
    exit 1
fi

echo "✅ Emulator detected"
echo ""

echo "📋 Network Diagnostics:"
echo ""

echo "1. 🔧 ADB Connection Status:"
adb devices
echo ""

echo "2. ✈️  Airplane Mode Status:"
AIRPLANE_MODE=$(adb -e shell settings get global airplane_mode_on 2>/dev/null)
if [ "$AIRPLANE_MODE" = "1" ]; then
    echo "   ❌ Airplane mode is ON - this will block network access"
    echo "   💡 Fix: adb -e shell settings put global airplane_mode_on 0"
else
    echo "   ✅ Airplane mode is OFF"
fi
echo ""

echo "3. 🌐 Network Interfaces:"
echo "   Network interfaces:"
adb -e shell ip addr | grep -E "(inet |UP|DOWN)" | head -10
echo ""
echo "   Routing table:"
adb -e shell ip route | head -5
echo ""

echo "4. 🏓 DNS Resolution Tests:"
echo "   Testing Google DNS (8.8.8.8):"
if adb -e shell ping -c1 8.8.8.8 >/dev/null 2>&1; then
    echo "   ✅ Google DNS reachable"
else
    echo "   ❌ Google DNS unreachable - host/VPN/firewall blocking"
fi

echo "   Testing connectivity check (connectivitycheck.gstatic.com):"
if adb -e shell ping -c1 connectivitycheck.gstatic.com >/dev/null 2>&1; then
    echo "   ✅ Hostname resolution working"
else
    echo "   ❌ Hostname resolution failed - DNS issue"
fi
echo ""

echo "5. 🔍 Play Services Status:"
echo "   Google Play Services:"
adb -e shell dumpsys package com.google.android.gms | grep -E "(versionName|enabled)" | head -2
echo ""

echo "6. 📊 Network Monitor Logs:"
echo "   Recent network errors (last 10 lines):"
adb -e logcat -d | grep -E "(NetworkMonitor|ECONNREFUSED|UnknownHostException)" | tail -5
echo ""

echo "🎯 Diagnosis Summary:"
echo ""

# Determine issue type
if [ "$AIRPLANE_MODE" = "1" ]; then
    echo "❌ PRIMARY ISSUE: Airplane mode is ON"
    echo "   Solution: Turn off airplane mode"
elif ! adb -e shell ping -c1 8.8.8.8 >/dev/null 2>&1; then
    echo "❌ PRIMARY ISSUE: No internet connectivity"
    echo "   Solutions:"
    echo "   - Check host VPN/killswitch settings"
    echo "   - Verify firewall rules allow emulator traffic"
    echo "   - Try: ./launch-emulator-network-fix.sh"
elif ! adb -e shell ping -c1 connectivitycheck.gstatic.com >/dev/null 2>&1; then
    echo "❌ PRIMARY ISSUE: DNS resolution failure"
    echo "   Solutions:"
    echo "   - Use explicit DNS: -dns-server 8.8.8.8,1.1.1.1"
    echo "   - Check corporate proxy settings"
    echo "   - Try: ./launch-emulator-network-fix.sh"
else
    echo "✅ Network connectivity appears normal"
    echo "   If still experiencing ANRs, check Play Services cache:"
    echo "   adb -e shell pm clear com.google.android.gms"
fi

echo ""
echo "🔧 Quick Fixes:"
echo "  # Clear Play Services cache"
echo "  adb -e shell pm clear com.google.android.gms"
echo "  adb -e shell pm clear com.android.vending"
echo ""
echo "  # Restart ADB"
echo "  adb kill-server && adb start-server"
echo ""
echo "  # Launch with network fixes"
echo "  ./launch-emulator-network-fix.sh"