import asyncio
from datetime import datetime
from string import Template

from bilibili_api import live
import ffmpy3

class Recorder:
    def __init__(self,room_display_id):
        self.ROOM_DISPLAY_ID=room_display_id

    async def __getInfoAndUrl(self,l):
        return await l.get_room_info(), await l.get_room_play_url(live.ScreenResolution.FOUR_K)

    def start(self, outputNameTemplate: str = '【${qn_desc}】${name} - ${datetime}', log: bool = True):
        OUTPUT_NAME_TEMPLATE=Template(outputNameTemplate)
        l = live.LiveRoom(room_display_id=self.ROOM_DISPLAY_ID)
        info, play_url = asyncio.get_event_loop().run_until_complete(self.__getInfoAndUrl(l))
        anchor_info=info["anchor_info"]["base_info"]
        current_qn = play_url["current_qn"]
        quality_descriptions = play_url["quality_description"]
        durl = play_url["durl"]
        current_qn_desc = "未知清晰度"
        for quality_description in quality_descriptions:
            if(current_qn == quality_description["qn"]):
                current_qn_desc = quality_description["desc"]
        url = durl[len(durl)-1]["url"]
        outputName = OUTPUT_NAME_TEMPLATE.safe_substitute({
            'name': anchor_info["uname"],
            'qn_desc': current_qn_desc,
            'datetime': datetime.now().isoformat()
        })
        f_handler=open(outputName+'.log', 'w') if log else asyncio.subprocess.PIPE
        self.ff = ffmpy3.FFmpeg(
            inputs={url:" -v debug"},
            outputs={outputName+".flv":"-c copy -y"}
        )
        self.process = self.ff.run_async(stdout=f_handler, stderr=f_handler)
        print(self.ff.cmd)
        asyncio.get_event_loop().run_until_complete(self.process)
        asyncio.get_event_loop().run_until_complete(self.ff.wait())
        print(self.process)
        
    
    def stop(self):
        self.process.terminate()