'''
数据处理与转存，实现弹幕AI关键词提取

sep是转存成字符后的弹幕分隔标志
isSaveText是用于表明是否将弹幕数据转存成文本的标志
xlsxPath是弹幕数据的路径
saveToText是转存成文本数据的路径
saveAiPath是输出ai相关弹幕的路径
keywords是ai关键词
'''

import re
import pandas as pd
from collections import Counter
from openpyxl import Workbook

# 读取弹幕文件
def ReadXlsx(filePath=''):
    df = pd.read_excel(filePath, sheet_name=0)
    df.dropna(axis=1, how='all')
    return df

# 将dataframe类型转为string类型
def ChangeDfToString(df,sep=',', isSave=False, filePath=''):
    string_data = df.to_string(index=False, header=False, na_rep='')
    string = string_data.replace('\n', ' ')
    str = re.sub(' +', sep, string)
    if isSave:
        with open(filePath, mode="w",encoding='utf-8') as file:
            file.write(str)
    return str

# 根据关键词进行检索
def GetKeyFromList(keyWords, origin_list):
    filtered_list = [item for item in origin_list if any(keyword in item for keyword in keyWords)]
    counter_list = Counter(filtered_list)
    sorted_list = sorted(counter_list.items(), key = lambda x:x[1], reverse=True)
    return sorted_list

def main():
    sep=','
    isSaveText=True
    xlsxPath = './docs/barrage.xlsx'
    saveToText = './docs/allBarrage.txt'
    saveAiPath = './docs/aiBarrage.xlsx'
    keywords = ['AI', '智能']
    df = ReadXlsx(xlsxPath)
    str = ChangeDfToString(df, sep, isSaveText, saveToText)
    s_list = str.split(sep)
    sorted_list = GetKeyFromList(keywords, s_list)
    wb = Workbook()
    ws = wb.active
    ws.cell(1, 1, '弹幕')
    ws.cell(1, 2, '次数')
    for i in range(8):
        for j in range(2):
            ws.cell(i+2, j+1, sorted_list[i][j])
    wb.save(saveAiPath)

    print(sorted_list)

if __name__ == '__main__':
    main()