FCI_WaterMaker_API/demo_external_changes.py

#!/usr/bin/env python3
"""
Demonstration script showing how the R1000 monitoring system handles
different external change scenarios.

This script simulates various external HMI actions and shows the system response.
"""

import time
import json
from datetime import datetime

def print_scenario(title, description):
    """Print a formatted scenario header"""
    print("\n" + "="*70)
    print(f"SCENARIO: {title}")
    print("-" * 70)
    print(description)
    print("="*70)

def simulate_r1000_change(old_value, new_value, scenario_name):
    """Simulate what happens when R1000 changes externally"""
    
    # Import the monitoring components (would be running in background)
    from watermaker_plc_api.services.background_tasks import R1000Monitor
    from watermaker_plc_api.services.data_cache import get_data_cache
    
    # Create a mock monitor for demonstration
    monitor = R1000Monitor()
    cache = get_data_cache()
    
    # Simulate the change detection
    change_info = {
        "previous_value": old_value,
        "new_value": new_value,
        "change_time": datetime.now().isoformat(),
        "change_type": monitor._classify_change(old_value, new_value),
        "external_change": True
    }
    
    print(f"\n🔍 DETECTED CHANGE:")
    print(f"   R1000: {old_value} → {new_value}")
    print(f"   Type: {change_info['change_type']}")
    print(f"   Time: {change_info['change_time']}")
    
    # Show what would be logged
    log_message = f"R1000 External Change: {old_value} → {new_value} ({change_info['change_type']})"
    print(f"\n📝 LOGGED TO CACHE:")
    print(f"   {log_message}")
    
    # Show impact assessment
    print(f"\n⚠️  IMPACT ASSESSMENT:")
    if "Process_Start" in change_info['change_type']:
        print("   - External system started DTS process")
        print("   - API should be aware process is now running")
        print("   - Any pending API start operations may conflict")
    elif "Process_Stop" in change_info['change_type']:
        print("   - External system stopped DTS process")
        print("   - Running API tasks should be marked as externally stopped")
        print("   - Process ended without API control")
    elif "Step_Skip" in change_info['change_type']:
        print("   - External system skipped a DTS step")
        print("   - Running API tasks should update current step")
        print("   - Timer-based progress may be affected")
    elif "Step_Advance" in change_info['change_type']:
        print("   - External system advanced DTS step")
        print("   - Running API tasks should track the advancement")
        print("   - Normal process flow continued externally")
    elif "DTS_Start" in change_info['change_type']:
        print("   - DTS process started from requested state")
        print("   - Normal transition, may be API or external")
        print("   - Monitor will track subsequent steps")
    else:
        print("   - General mode change detected")
        print("   - May indicate system state change")
        print("   - Monitor will continue tracking")
    
    return change_info

def main():
    """Run demonstration scenarios"""
    
    print("R1000 MONITORING SYSTEM - EXTERNAL CHANGE SCENARIOS")
    print("This demonstration shows how the system detects and handles external changes")
    
    # Scenario 1: External HMI starts DTS process
    print_scenario(
        "External HMI Starts DTS Process",
        "User presses DTS start button on external HMI while system is in standby mode"
    )
    simulate_r1000_change(2, 5, "external_start")
    
    # Scenario 2: External HMI stops running DTS process
    print_scenario(
        "External HMI Stops Running DTS Process", 
        "User presses stop button on external HMI while DTS is in production mode"
    )
    simulate_r1000_change(7, 2, "external_stop")
    
    # Scenario 3: External HMI skips priming step
    print_scenario(
        "External HMI Skips Priming Step",
        "User skips priming step on external HMI, jumping directly to production"
    )
    simulate_r1000_change(5, 7, "external_skip")
    
    # Scenario 4: External HMI advances from init to flush
    print_scenario(
        "External HMI Advances to Flush",
        "User advances from init step directly to flush step on external HMI"
    )
    simulate_r1000_change(6, 8, "external_advance")
    
    # Scenario 5: External system requests DTS
    print_scenario(
        "External System Requests DTS",
        "External system sets DTS requested mode, preparing for DTS start"
    )
    simulate_r1000_change(2, 34, "external_request")
    
    # Scenario 6: Normal DTS progression (for comparison)
    print_scenario(
        "Normal DTS Progression (For Comparison)",
        "Normal progression from DTS requested to DTS priming (may be API or external)"
    )
    simulate_r1000_change(34, 5, "normal_progression")
    
    # Summary
    print("\n" + "="*70)
    print("SUMMARY - R1000 MONITORING CAPABILITIES")
    print("="*70)
    
    capabilities = [
        "✅ Detects all R1000 changes in real-time",
        "✅ Classifies change types automatically", 
        "✅ Logs changes to data cache for API access",
        "✅ Assesses impact on running DTS tasks",
        "✅ Provides detailed change history",
        "✅ Integrates with existing background task system",
        "✅ Offers API endpoints for monitoring status",
        "✅ Supports callback system for custom handling"
    ]
    
    for capability in capabilities:
        print(f"  {capability}")
    
    print("\n" + "="*70)
    print("INTEGRATION WITH EXISTING SYSTEM")
    print("="*70)
    
    integration_points = [
        "🔗 Background Tasks: Integrated into existing data update loop",
        "🔗 DTS Controller: Enhanced to detect external changes during operations", 
        "🔗 Data Cache: Uses existing error logging system for change history",
        "🔗 API Endpoints: New endpoint provides monitoring status and history",
        "🔗 Logging System: Uses existing logger with appropriate warning levels",
        "🔗 PLC Connection: Uses existing PLC connection service"
    ]
    
    for point in integration_points:
        print(f"  {point}")
    
    print("\n" + "="*70)
    print("USAGE IN PRODUCTION")
    print("="*70)
    
    usage_scenarios = [
        "🏭 Operators can use external HMI while API monitoring continues",
        "🏭 System detects conflicts between API and external operations",
        "🏭 Maintenance staff can see history of external changes",
        "🏭 Debugging is easier with detailed change classification",
        "🏭 Process integrity is maintained with change awareness",
        "🏭 Real-time alerts possible for critical external changes"
    ]
    
    for scenario in usage_scenarios:
        print(f"  {scenario}")
    
    print(f"\n{'='*70}")
    print("DEMONSTRATION COMPLETE")
    print(f"{'='*70}")
    print("The R1000 monitoring system is ready to detect and handle external changes.")
    print("Run 'python test_r1000_monitoring.py' for live testing with actual PLC.")

if __name__ == "__main__":
    main()