from sqlalchemy import text
import json


def rain(session):
    # 使用 text() 构造您的 SQL 查询
    query = text('SELECT city_name,rain24h FROM rain_24h_analyse ORDER BY rain24h DESC LIMIT 7')

    # 降水排行
    rain = session.execute(query).fetchall()

    x = []
    y = []
    for i in rain:
        x.append(i[0])
        y.append(float(i[1]))

    dict_list = {"x": x, "y": y}
    # Serialize the list of dictionaries to JSON
    data = json.dumps(dict_list, ensure_ascii=False, indent=4)

    # 将 JSON 数据写入 JavaScript 文件
    with open('data.js', 'w', encoding='utf-8') as js_file:
        js_file.write('const Chart1_Data = ')
        js_file.write(data)
        js_file.write("\n\n")