import pygame
import random

def blinky_behavior(ghost, pacman, maze):
    # Simple chase: move toward Pac-Man's position
    return path_toward(ghost, (pacman.x, pacman.y), maze)

def pinky_behavior(ghost, pacman, maze):
    # Aim 4 tiles ahead of Pac-Man
    offset = pacman.x + 128
    target = (pacman.x + offset, pacman.y + offset)
    return path_toward(ghost, target, maze)

def inky_behavior(ghost, pacman, maze):
    # Placeholder for now: same as Pinky
    return pinky_behavior(ghost, pacman, maze)

def clyde_behavior(ghost, pacman, maze):
    # If close to Pac-Man, scatter; otherwise chase
    distance = pygame.Vector2(pacman.x).distance_to(ghost.rect.center)
    if distance < 100:
        return path_toward(ghost, ghost.home_position, maze)
    return path_toward(ghost, pacman.x, maze)

def path_toward(ghost, target_pos, maze):
    # Placeholder logic: pick a direction that reduces distance to target
    directions = [pygame.Vector2(1, 0), pygame.Vector2(-1, 0),
                  pygame.Vector2(0, 1), pygame.Vector2(0, -1)]
    best = ghost.direction
    min_dist = float("inf")
    for d in directions:
        test_pos = ghost.rect.move(d.x * ghost.speed, d.y * ghost.speed)
        if not maze.is_wall(test_pos[0], test_pos[1]):
            dist = pygame.Vector2(target_pos).distance_to(test_pos.center)
            if dist < min_dist:
                min_dist = dist
                best = d
    return best