import csv
import sys
from pathlib import Path

# Adjust sys.path to allow imports from src when run directly
BASE_DIR = Path(__file__).resolve().parent
sys.path.append(str(BASE_DIR.parent))

from src.builder import TextFileMazeBuilder
from src.solver import MazeSolver
from src.strategies import AStarStrategy, BFSStrategy, DFSStrategy

MAZE_DIR = BASE_DIR / "mazes"


def run_benchmarks():
    builder = TextFileMazeBuilder()
    strategies = [
        ("BFS", BFSStrategy()),
        ("DFS", DFSStrategy()),
        ("A*", AStarStrategy()),
    ]

    results = []

    for maze_path in sorted(MAZE_DIR.glob("*.txt")):
        maze_name = maze_path.stem
        try:
            maze = builder.build_from_file(maze_path)
        except Exception as e:
            continue

        solver = MazeSolver(maze)

        for strat_name, strat in strategies:
            solver.set_strategy(strat)

            times = []
            stats = None
            for _ in range(10):
                stats = solver.solve()
                times.append(stats.time_ms)

            avg_time = sum(times) / len(times)

            results.append(
                {
                    "maze": maze_name,
                    "strategy": strat_name,
                    "time_ms": avg_time,
                    "visited_cells": stats.visited_cells,
                    "path_length": stats.path_length,
                }
            )

    csv_path = BASE_DIR.parent / "results.csv"
    with open(csv_path, "w", newline="", encoding="utf-8") as f:
        writer = csv.DictWriter(
            f,
            fieldnames=["maze", "strategy", "time_ms", "visited_cells", "path_length"],
        )
        writer.writeheader()
        writer.writerows(results)

    print(f"Benchmark results stored in {csv_path}")


if __name__ == "__main__":
    run_benchmarks()