import threading
import time
import tkinter.simpledialog  # 使用Tkinter前需要先導(dǎo)入
from tkinter import END, messagebox

import requests

# 全局變量，用于標(biāo)識(shí)線程是否退出
is_exit = True


# B站獲取彈幕對(duì)象
class Danmu():
    def __init__(self, room_id):
        # 彈幕url
        self.url = 'https://api.live.bilibili.com/xlive/web-room/v1/dM/gethistory'
        # 請(qǐng)求頭
        self.headers = {
            'Host': 'api.live.bilibili.com',
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0',
        }
        # 定義POST傳遞的參數(shù)
        self.data = {
            'roomid': room_id,
            'csrf_token': '',
            'csrf': '',
            'visit_id': '',
        }
        # 日志寫對(duì)象
        self.log_file_write = open('danmu.log', mode='a', encoding='utf-8')
        # 讀取日志
        log_file_read = open('danmu.log', mode='r', encoding='utf-8')
        self.log = log_file_read.readlines()

    def get_danmu(self):
        # 暫停0.5防止cpu占用過高
        time.sleep(1)
        # 獲取直播間彈幕
        html = requests.post(url=self.url, headers=self.headers, data=self.data).json()
        # 解析彈幕列表
        for content in html['data']['room']:
            # 獲取昵稱
            nickname = content['nickname']
            # 獲取發(fā)言
            text = content['text']
            # 獲取發(fā)言時(shí)間
            timeline = content['timeline']
            # 記錄發(fā)言
            msg = timeline + ' ' + nickname + ': ' + text
            # 判斷對(duì)應(yīng)消息是否存在于日志，如果和最后一條相同則打印并保存
            if msg + '\n' not in self.log:
                # 打印消息
                listb.insert(END, msg)
                listb.see(END)
                # 保存日志
                self.log_file_write.write(msg + '\n')
                # 添加到日志列表
                self.log.append(msg + '\n')
            # 清空變量緩存
            nickname = ''
            text = ''
            timeline = ''
            msg = ''


# 線程對(duì)象
def bilibili(room_id):
    # 創(chuàng)建bDanmu實(shí)例
    bDanmu = Danmu(room_id)
    # 獲取彈幕
    bDanmu.get_danmu()


class BilibiliThread(threading.Thread):
    def __init__(self, room_id=None):
        threading.Thread.__init__(self)
        self.room_id = room_id

    # 重寫run()方法
    def run(self):
        global is_exit
        while not is_exit:
            print(self.room_id)
            bilibili(self.room_id)
            # 暫停防止cpu占用過高
            time.sleep(0.5)


def author():
    # 彈出對(duì)話框
    messagebox.showinfo(title='關(guān)于', message='作者：阿壯Jonson\n日期：2021年2月4日\n微信公眾號(hào)：科技貓')


# 實(shí)例化object，建立窗口window
window = tkinter.Tk()
# 給窗口的可視化起名字
window.title('BiliBli彈幕查看工具')
# 設(shè)定窗口的大小(長(zhǎng) * 寬)
window.minsize(300, 500)
window.geometry('400x600+250+100')

# 菜單欄
menubar = tkinter.Menu(window)
# Open放在菜單欄中，就是裝入容器
menubar.add_command(label='關(guān)于', command=author)
# 創(chuàng)建菜單欄完成后，配置讓菜單欄menubar顯示出來
window.config(menu=menubar)

# 創(chuàng)建一個(gè)主frame，長(zhǎng)在主window窗口上
frame = tkinter.Frame(window)
frame.pack()

# 創(chuàng)建第二層框架frame，長(zhǎng)在主框架frame上面
# 上
frame_t = tkinter.Frame(frame)
# 下
frame_b = tkinter.Frame(frame)
frame_t.pack(side=tkinter.TOP)
frame_b.pack(side=tkinter.BOTTOM)

# 創(chuàng)建標(biāo)簽
tkinter.Label(frame_t, text='請(qǐng)輸入房間號(hào)：', width=10, font=('Arial', 10)).pack(side=tkinter.LEFT)
# 顯示成明文形式
default_text = tkinter.StringVar()
default_text.set("21089733")
e1 = tkinter.Entry(frame_t, show=None, width=15, textvariable=default_text, font=('Arial', 10))
e1.pack(side=tkinter.LEFT)


# 定義兩個(gè)觸發(fā)事件時(shí)的函數(shù)start_point和end_point（注意：因?yàn)镻ython的執(zhí)行順序是從上往下，所以函數(shù)一定要放在按鈕的上面）
# 開始
def start_point():
    try:
        room = e1.get()
        room_int = int(room)
        e1.configure(state=tkinter.DISABLED)
        b1.configure(state=tkinter.DISABLED)
        b2.configure(state=tkinter.NORMAL)
        if room_int is not None:
            global is_exit
            is_exit = False
            t = BilibiliThread()
            t.room_id = room_int
            # 創(chuàng)建獲取彈幕線程
            t.setDaemon(True)
            t.start()
    except ValueError:
        messagebox.showinfo(title='警告', message='輸入的房間號(hào)格式不正確,請(qǐng)?jiān)俅螄L試輸入!')


# 停止
def end_point():
    global is_exit
    is_exit = True
    e1.configure(state=tkinter.NORMAL)
    b1.configure(state=tkinter.NORMAL)
    b2.configure(state=tkinter.DISABLED)


# 創(chuàng)建并放置兩個(gè)按鈕分別觸發(fā)兩種情況
b1 = tkinter.Button(frame_t, text='開始', width=10, command=start_point, font=('Arial', 10))
b1.pack(side=tkinter.LEFT)
b2 = tkinter.Button(frame_t, text='停止', width=10, command=end_point, font=('Arial', 10))
b2.pack(side=tkinter.LEFT)

# 滾動(dòng)條
sc = tkinter.Scrollbar(frame_b)
sc.pack(side=tkinter.RIGHT, fill=tkinter.Y)
# Listbox控件
listb = tkinter.Listbox(frame_b, yscrollcommand=sc.set, width=200, height=120)
# 將部件放置到主窗口中
listb.pack(side=tkinter.LEFT, fill=tkinter.BOTH, expand=True)
# 滾動(dòng)條動(dòng)，列表跟著動(dòng)
sc.config(command=listb.yview)

# 主窗口循環(huán)顯示
window.mainloop()