#!/bin/bash

# Test Apache and PostfixAdmin Setup
# This script helps diagnose Apache and PostfixAdmin issues

set -euo pipefail

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

info() {
    echo -e "${BLUE}INFO: $1${NC}"
}

success() {
    echo -e "${GREEN}SUCCESS: $1${NC}"
}

warning() {
    echo -e "${YELLOW}WARNING: $1${NC}"
}

error() {
    echo -e "${RED}ERROR: $1${NC}"
}

info "=== Apache and PostfixAdmin Diagnostic ==="

# Check Apache status
info "1. Checking Apache status..."
if systemctl is-active --quiet apache2; then
    success "Apache is running"
else
    error "Apache is not running"
    echo "Try: systemctl start apache2"
fi

# Check listening ports
info "2. Checking listening ports..."
echo "Ports 80 and 443:"
ss -tlnp | grep -E ":(80|443) " || warning "No services listening on ports 80 or 443"

# Check Apache sites
info "3. Checking Apache sites..."
echo "Available sites:"
ls -la /etc/apache2/sites-available/ 2>/dev/null || warning "No sites-available directory"

echo "Enabled sites:"
ls -la /etc/apache2/sites-enabled/ 2>/dev/null || warning "No sites-enabled directory"

# Check PostfixAdmin directory
info "4. Checking PostfixAdmin installation..."
WEBROOT="/var/www/postfixadmin"
if [[ -d "$WEBROOT" ]]; then
    success "PostfixAdmin directory exists: $WEBROOT"
    echo "Contents:"
    ls -la "$WEBROOT" | head -10
    
    # Check if index.php exists
    if [[ -f "$WEBROOT/index.php" ]]; then
        success "index.php found"
    elif [[ -f "$WEBROOT/public/index.php" ]]; then
        success "index.php found in public directory"
        warning "You may need to update DocumentRoot to $WEBROOT/public"
    else
        warning "index.php not found"
    fi
    
    # Check permissions
    echo "Permissions:"
    ls -ld "$WEBROOT"
else
    error "PostfixAdmin directory not found: $WEBROOT"
fi

# Check PHP-FPM
info "5. Checking PHP-FPM..."
if systemctl is-active --quiet php*-fpm; then
    success "PHP-FPM is running"
else
    warning "PHP-FPM may not be running"
    echo "Try: systemctl status php*-fpm"
fi

# Check Apache configuration
info "6. Testing Apache configuration..."
if apachectl configtest 2>/dev/null; then
    success "Apache configuration is valid"
else
    error "Apache configuration has errors:"
    apachectl configtest
fi

# Check SSL certificates
info "7. Checking SSL certificates..."
HOSTNAME=$(hostname -f 2>/dev/null || hostname)
if [[ -f "/etc/letsencrypt/live/$HOSTNAME/fullchain.pem" ]]; then
    success "SSL certificate found for $HOSTNAME"
else
    warning "SSL certificate not found for $HOSTNAME"
    echo "Check: ls -la /etc/letsencrypt/live/"
fi

# Check Apache error log
info "8. Recent Apache errors (last 10 lines):"
if [[ -f "/var/log/apache2/error.log" ]]; then
    tail -10 /var/log/apache2/error.log
else
    warning "Apache error log not found"
fi

# Test HTTP response
info "9. Testing HTTP response..."
if command -v curl &> /dev/null; then
    echo "HTTP (port 80) response:"
    curl -I -s http://localhost/ 2>/dev/null | head -5 || warning "No response on port 80"
    
    echo "HTTPS (port 443) response:"
    curl -I -s -k https://localhost/ 2>/dev/null | head -5 || warning "No response on port 443"
else
    warning "curl not installed, cannot test HTTP responses"
fi

info "=== Diagnostic completed ==="
echo
info "If Apache is not working:"
echo "1. Check: journalctl -u apache2 -f"
echo "2. Check: /var/log/apache2/error.log"
echo "3. Try: systemctl restart apache2"
echo "4. Run: ./fix-apache.sh"