import json
from collections import Counter

def analyze_movies(json_path="movies.json"):
    with open(json_path, "r", encoding="utf-8") as f:
        data = json.load(f)
    movies = data["movies"]
    
    # ① 评分最高和最低
    max_movie = max(movies, key=lambda x: x['rating'])
    min_movie = min(movies, key=lambda x: x['rating'])
    print(f"最高评分电影：{max_movie['title']}，评分：{max_movie['rating']}")
    print(f"最低评分电影：{min_movie['title']}，评分：{min_movie['rating']}")
    
    # ② 各类型电影数量
    genre_counter = Counter()
    for movie in movies:
        for genre in movie['genre']:
            genre_counter[genre] += 1
    print("各类型电影数量：", dict(genre_counter))
    
    # ③ 各导演电影数量
    director_counter = Counter(movie['director'] for movie in movies)
    print("各导演电影数量：", dict(director_counter))
    
    # ④ 2020年（含）以后上映的电影数量
    count_2020_plus = sum(1 for movie in movies if movie['year'] >= 2020)
    print(f"2020年（含）以后上映的电影数量：{count_2020_plus}")

if __name__ == "__main__":
    analyze_movies()