from flask import Flask, jsonify, request

app = Flask(__name__)

# 模拟数据库，存储用户信息
users = []


# 查看所有用户信息
@app.route('/users', methods=['GET'])
def get_users():
    return jsonify(users)


# 查看单个用户信息
@app.route('/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    for user in users:
        if user['id'] == user_id:
            return jsonify(user)
    return jsonify({'message': 'User not found'}), 404


# 添加用户
@app.route('/users', methods=['POST'])
def add_user():
    new_user = request.get_json()
    new_user['id'] = len(users) + 1
    users.append(new_user)
    return jsonify(new_user), 201


# 修改用户信息
@app.route('/users/<int:user_id>', methods=['PUT'])
def update_user(user_id):
    updated_user = request.get_json()
    for i, user in enumerate(users):
        if user['id'] == user_id:
            users[i].update(updated_user)
            return jsonify(users[i])
    return jsonify({'message': 'User not found'}), 404


# 删除用户信息
@app.route('/users/<int:user_id>', methods=['DELETE'])
def delete_user(user_id):
    for i, user in enumerate(users):
        if user['id'] == user_id:
            del users[i]
            return jsonify({'message': 'User deleted'})
    return jsonify({'message': 'User not found'}), 404


if __name__ == '__main__':
    app.run(debug=True)