#!/bin/bash
# Check MockAPI port configuration consistency
# Run this to verify port settings are correct

echo "=== MockAPI Port Configuration Check ==="
echo

APP_DIR="/opt/mockapi"
ENV_FILE="${APP_DIR}/.env"
SERVICE_FILE="/etc/systemd/system/mockapi.service"

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

print_ok() {
    echo -e "${GREEN}[✓]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[!]${NC} $1"
}

print_error() {
    echo -e "${RED}[✗]${NC} $1"
}

# Check if files exist
if [[ ! -f "$ENV_FILE" ]]; then
    print_error ".env file not found: $ENV_FILE"
    exit 1
fi

if [[ ! -f "$SERVICE_FILE" ]]; then
    print_error "Service file not found: $SERVICE_FILE"
    exit 1
fi

print_ok "Checking configuration files..."

# Read values from .env
ENV_PORT=$(grep "^PORT=" "$ENV_FILE" | cut -d'=' -f2 || echo "NOT_FOUND")
ENV_HOST=$(grep "^HOST=" "$ENV_FILE" | cut -d'=' -f2 || echo "NOT_FOUND")
ENV_ISSUER=$(grep "^OAUTH2_ISSUER=" "$ENV_FILE" | cut -d'=' -f2 || echo "NOT_FOUND")

# Read from service file
SERVICE_LINE=$(grep "^ExecStart=" "$SERVICE_FILE" || echo "NOT_FOUND")
if [[ "$SERVICE_LINE" != "NOT_FOUND" ]]; then
    # Extract host and port from ExecStart
    SERVICE_HOST=$(echo "$SERVICE_LINE" | grep -o -- '--host=[^ ]*' | cut -d'=' -f2 || echo "NOT_FOUND")
    SERVICE_PORT=$(echo "$SERVICE_LINE" | grep -o -- '--port=[^ ]*' | cut -d'=' -f2 || echo "NOT_FOUND")
else
    SERVICE_HOST="NOT_FOUND"
    SERVICE_PORT="NOT_FOUND"
fi

echo
echo "=== Current Configuration ==="
echo

echo ".env file ($ENV_FILE):"
echo "  PORT: $ENV_PORT"
echo "  HOST: $ENV_HOST"
echo "  OAUTH2_ISSUER: $ENV_ISSUER"
echo

echo "Service file ($SERVICE_FILE):"
echo "  HOST in ExecStart: $SERVICE_HOST"
echo "  PORT in ExecStart: $SERVICE_PORT"
echo

echo "=== Analysis ==="
echo

# Check 1: Port numeric validation
if [[ "$ENV_PORT" =~ ^[0-9]+$ ]]; then
    print_ok "PORT in .env is numeric: $ENV_PORT"
else
    print_error "PORT in .env is not numeric: '$ENV_PORT'"
fi

if [[ "$SERVICE_PORT" =~ ^[0-9]+$ ]]; then
    print_ok "PORT in service file is numeric: $SERVICE_PORT"
else
    print_error "PORT in service file is not numeric: '$SERVICE_PORT'"
fi

# Check 2: Port consistency
if [[ "$ENV_PORT" == "$SERVICE_PORT" ]]; then
    print_ok "Ports match: .env=$ENV_PORT, service=$SERVICE_PORT"
else
    print_error "Port mismatch! .env=$ENV_PORT, service=$SERVICE_PORT"
fi

# Check 3: Host consistency  
if [[ "$ENV_HOST" == "$SERVICE_HOST" ]]; then
    print_ok "Hosts match: .env=$ENV_HOST, service=$SERVICE_HOST"
elif [[ "$ENV_HOST" == "NOT_FOUND" ]] || [[ "$SERVICE_HOST" == "NOT_FOUND" ]]; then
    print_warning "Host not found in one or both files"
else
    print_error "Host mismatch! .env=$ENV_HOST, service=$SERVICE_HOST"
fi

# Check 4: OAUTH2_ISSUER consistency
EXPECTED_ISSUER="http://localhost:${ENV_PORT}"
if [[ "$ENV_ISSUER" == "$EXPECTED_ISSUER" ]]; then
    print_ok "OAUTH2_ISSUER matches port: $ENV_ISSUER"
elif [[ "$ENV_ISSUER" == "NOT_FOUND" ]]; then
    print_warning "OAUTH2_ISSUER not found in .env"
else
    print_warning "OAUTH2_ISSUER doesn't match port: $ENV_ISSUER (expected: $EXPECTED_ISSUER)"
fi

# Check 5: Service status
echo
echo "=== Service Status ==="
echo

if systemctl is-active --quiet mockapi 2>/dev/null; then
    print_ok "Service is running"
    
    # Try to get actual listening port
    if command -v ss &> /dev/null; then
        LISTENING_PORT=$(ss -tuln | grep ":$ENV_PORT " | head -1 | awk '{print $4}' | cut -d':' -f2)
        if [[ -n "$LISTENING_PORT" ]]; then
            print_ok "Service is listening on port: $LISTENING_PORT"
            if [[ "$LISTENING_PORT" == "$ENV_PORT" ]]; then
                print_ok "Listening port matches configured port"
            else
                print_error "Listening port ($LISTENING_PORT) doesn't match configured port ($ENV_PORT)"
            fi
        fi
    fi
    
    # Test health endpoint
    echo
    echo "Testing health endpoint..."
    if curl -f -s --max-time 5 http://localhost:${ENV_PORT}/health > /dev/null 2>&1; then
        print_ok "Health check passed: http://localhost:${ENV_PORT}/health"
    else
        print_warning "Health check failed on port $ENV_PORT"
        print_warning "Service might be starting up or have issues"
    fi
else
    print_error "Service is not running"
    echo "Status:"
    systemctl status mockapi --no-pager -l | head -20
fi

echo
echo "=== Recommendations ==="
echo

if [[ "$ENV_PORT" != "$SERVICE_PORT" ]]; then
    echo "1. Fix port mismatch:"
    echo "   Run: sudo bash change_port.sh"
    echo "   Or manually update .env and service file to match"
fi

if [[ ! "$ENV_PORT" =~ ^[0-9]+$ ]]; then
    echo "2. Fix invalid PORT in .env:"
    echo "   Edit $ENV_FILE and set PORT to a numeric value (e.g., 8000)"
fi

if [[ "$ENV_ISSUER" != "http://localhost:${ENV_PORT}" ]] && [[ "$ENV_ISSUER" != "NOT_FOUND" ]]; then
    echo "3. Update OAUTH2_ISSUER to match port:"
    echo "   Edit $ENV_FILE and set: OAUTH2_ISSUER=http://localhost:${ENV_PORT}"
fi

if ! systemctl is-active --quiet mockapi 2>/dev/null; then
    echo "4. Start the service:"
    echo "   sudo systemctl start mockapi"
    echo "   sudo systemctl status mockapi"
fi

echo
echo "=== Summary ==="
echo "Run 'sudo bash change_port.sh' to fix any configuration issues."
echo "Run 'sudo systemctl restart mockapi' after making changes."