import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
from pathlib import Path


def plot_results(csv_file='experiment_results.csv'):
    
    if not Path(csv_file).exists():
        print(f"❌ {csv_file} не найден. Сначала запустите main.py")
        return
    
    df = pd.read_csv(csv_file)

    df = df[df['path_found'] == True]
    
    if df.empty:
        print("Нет данных для графиков")
        return
    
    mazes = [m.replace('.txt', '') for m in df['maze_file'].unique()]
    strategies = df['strategy'].unique()
    
    fig, axes = plt.subplots(1, 3, figsize=(14, 5))
    fig.suptitle('Сравнение алгоритмов поиска в лабиринте', fontsize=14, fontweight='bold')
    
    x = np.arange(len(mazes))
    width = 0.25
    colors = {'BFS': '#3498db', 'DFS': '#2ecc71', 'A*': '#e74c3c'}
    
    for i, strategy in enumerate(strategies):
        times, visited, lengths = [], [], []
        
        for maze in df['maze_file'].unique():
            data = df[(df['strategy'] == strategy) & (df['maze_file'] == maze)]
            if not data.empty:
                times.append(data['time_mean'].values[0])
                visited.append(data['visited_mean'].values[0])
                lengths.append(data['path_length_mean'].values[0])
            else:
                times.append(0)
                visited.append(0)
                lengths.append(0)
        
        axes[0].bar(x + i*width, times, width, label=strategy,
                    color=colors.get(strategy, 'gray'), alpha=0.7)
        axes[1].bar(x + i*width, visited, width, label=strategy,
                    color=colors.get(strategy, 'gray'), alpha=0.7)
        axes[2].bar(x + i*width, lengths, width, label=strategy,
                    color=colors.get(strategy, 'gray'), alpha=0.7)
    
    axes[0].set_title(' Время выполнения (мс)')
    axes[0].set_xticks(x + width)
    axes[0].set_xticklabels(mazes, rotation=45, ha='right')
    axes[0].legend()
    axes[0].grid(True, alpha=0.3)
    
    axes[1].set_title(' Посещённые клетки')
    axes[1].set_xticks(x + width)
    axes[1].set_xticklabels(mazes, rotation=45, ha='right')
    axes[1].legend()
    axes[1].grid(True, alpha=0.3)
    
    axes[2].set_title(' Длина пути')
    axes[2].set_xticks(x + width)
    axes[2].set_xticklabels(mazes, rotation=45, ha='right')
    axes[2].legend()
    axes[2].grid(True, alpha=0.3)
    
    plt.tight_layout()
    plt.savefig('experiment_results.png', dpi=150, bbox_inches='tight')
    plt.show()
    


if __name__ == "__main__":
    plot_results()