#!/usr/bin/env python3
"""
Test Critical Fixes
Validates the StateManager fix and increased time resolution (nstp=100)
"""

import sys
import os
sys.path.append(os.path.dirname(os.path.abspath(__file__)))

# Simulate fresh Python module load
import importlib
import gspy_interface
importlib.reload(gspy_interface)

from gspy_interface import run_modflow_step
import time

def test_critical_fixes():
    """Test the two critical fixes for Tutorial 2 accuracy"""
    
    print("=" * 80)
    print("CRITICAL FIXES VALIDATION TEST")
    print("Fix 1: StateManager instantiation error")
    print("Fix 2: Time resolution increase (nstp=10 → nstp=100)")
    print("=" * 80)
    
    # Wait to ensure clean start
    time.sleep(12)
    
    print("\n🔧 FIX 1 TEST: StateManager Instantiation")
    print("-" * 60)
    print("Testing if StateManager error is resolved...")
    
    head1 = run_modflow_step(1, 0.0, 10.0, 0.3)[0]
    print(f"Period 1 result: {head1:.6f} m")
    
    if head1 == 10.0:
        print("✅ SUCCESS: No StateManager error, proper reset working")
    else:
        print("⚠️  WARNING: Check logs for StateManager issues")
    
    print("\n🔧 FIX 2 TEST: High Resolution Time Stepping")  
    print("-" * 60)
    print("Testing Period 2 with nstp=100 for sharp transient capture...")
    
    head2 = run_modflow_step(2, 0.0, 10.0, 0.3)[0]
    print(f"Period 2 result: {head2:.6f} m")
    
    change = head2 - head1
    print(f"Head change: {change:+.6f} m")
    
    print("\n📊 EXPECTED IMPROVEMENTS:")
    print("1. No StateManager errors in logs")
    print("2. More precise transient behavior with nstp=100")
    print("3. Better capture of non-linear groundwater response")
    print("4. Heads should show sharper gradient response")
    
    # Test Period 3 pumping for non-linear behavior
    print("\n🔧 FIX 2 VERIFICATION: Period 3 Non-Linear Response")
    print("-" * 60)
    
    head3 = run_modflow_step(3, -500.0, 10.0, 0.3)[0]
    print(f"Period 3 (pumping): {head3:.6f} m")
    
    pumping_drawdown = head2 - head3
    print(f"Pumping drawdown: {pumping_drawdown:.6f} m")
    
    if pumping_drawdown > 0.001:
        print("✅ SUCCESS: Significant drawdown response to pumping")
    else:
        print("⚠️  CONCERN: Small drawdown may indicate resolution issue")
    
    print("\n📈 RESOLUTION ANALYSIS:")
    print(f"Previous: nstp=10  (0.1 day sub-steps)")
    print(f"Current:  nstp=100 (0.01 day sub-steps)")
    print(f"Improvement: 10x better temporal resolution")
    print(f"Expected: Sharper, more accurate transient response")
    
    print(f"\n🎯 SUMMARY:")
    print(f"Day 1 (Period 1): {head1:.6f} m")
    print(f"Day 2 (Period 2): {head2:.6f} m")  
    print(f"Day 3 (Period 3): {head3:.6f} m")
    
    print("\n" + "=" * 80)
    print("CRITICAL FIXES TEST COMPLETE")
    print("Check logs above for:")
    print("- No StateManager errors") 
    print("- nstp=100 confirmation")
    print("- Sharp transient response")
    print("=" * 80)

if __name__ == "__main__":
    test_critical_fixes()