"""
Main Flask Routes

Handles the primary web interface for the Markov economics simulation,
including the main simulation page and basic navigation.
"""

from flask import Blueprint, render_template, request, jsonify
from app.models import SimulationManager, SimulationParameters

main_bp = Blueprint('main', __name__)

# Global simulation manager instance
simulation_manager = SimulationManager()


@main_bp.route('/')
def index():
    """
    Main simulation interface page.
    
    Returns:
        Rendered HTML template with simulation controls
    """
    # Default parameters for display
    default_params = {
        'r_rate': 0.05,  # 5% capital return rate
        'g_rate': 0.03,  # 3% economic growth rate
        'initial_capital': 1000.0,
        'initial_consumption': 1000.0,
        'num_agents': 100,
        'iterations': 1000
    }
    
    return render_template('simulation.html', 
                         default_params=default_params,
                         title="Markov Economics - Capitalism Eats the World")


@main_bp.route('/simulation')
def simulation():
    """
    Alternative route to the main simulation page.
    
    Returns:
        Rendered HTML template with simulation controls
    """
    return index()


@main_bp.route('/about')
def about():
    """
    Information page about the economic theory behind the simulation.
    
    Returns:
        Rendered HTML template with theoretical background
    """
    return render_template('about.html', 
                         title="About - Markov Economics Theory")


@main_bp.route('/results/<simulation_id>')
def results(simulation_id):
    """
    Display results for a specific simulation.
    
    Args:
        simulation_id: Unique identifier for the simulation
        
    Returns:
        Rendered results template or 404 if simulation not found
    """
    simulation = simulation_manager.get_simulation(simulation_id)
    
    if not simulation:
        return render_template('error.html', 
                             error_message=f"Simulation {simulation_id} not found",
                             title="Simulation Not Found"), 404
    
    # Get simulation summary data
    latest_snapshot = simulation.get_latest_snapshot()
    iterations, total_wealth, gini_coefficients = simulation.get_wealth_evolution()
    
    summary_data = {
        'simulation_id': simulation_id,
        'parameters': {
            'r_rate': simulation.parameters.r_rate,
            'g_rate': simulation.parameters.g_rate,
            'num_agents': simulation.parameters.num_agents,
            'iterations': simulation.parameters.iterations
        },
        'current_iteration': simulation.current_iteration,
        'total_iterations': len(simulation.snapshots),
        'latest_snapshot': latest_snapshot,
        'has_data': len(simulation.snapshots) > 0
    }
    
    return render_template('results.html', 
                         simulation_data=summary_data,
                         title=f"Results - Simulation {simulation_id[:8]}")


@main_bp.route('/health')
def health_check():
    """
    Simple health check endpoint.
    
    Returns:
        JSON response indicating service status
    """
    return jsonify({
        'status': 'healthy',
        'service': 'markov-economics',
        'active_simulations': len(simulation_manager.active_simulations),
        'total_simulations': len(simulation_manager.simulations)
    })


@main_bp.errorhandler(404)
def not_found_error(error):
    """
    Handle 404 errors with custom template.
    
    Args:
        error: The error object
        
    Returns:
        Rendered error template
    """
    return render_template('error.html', 
                         error_message="Page not found",
                         title="Page Not Found"), 404


@main_bp.errorhandler(500)
def internal_error(error):
    """
    Handle 500 errors with custom template.
    
    Args:
        error: The error object
        
    Returns:
        Rendered error template
    """
    return render_template('error.html', 
                         error_message="Internal server error occurred",
                         title="Server Error"), 500