import argparse
import queue
import time
import threading
import logging
import os

from PIL import Image

from daily import EventHandler, CallClient, Daily
from datetime import datetime
from dotenv import load_dotenv

from auth import get_meeting_token, get_room_name
from pipeline import Pipeline
from device import device, torch_dtype

load_dotenv()

class DailyVision(EventHandler):
    def __init__(
        self,
        room_url,
        room_name,
        expiration,
        idle,
        bot_name="Daily Bot"
    ):
        self.__client = CallClient(event_handler=self)
        self.__pipeline = Pipeline
        self.__camera = None
        self.__time = time.time()
        self.__queue = queue.Queue()
        self.__app_quit = False
        self.__image_buffer = None
        self.__bot_name = bot_name
        self.__room_url = room_url
        self.__room_name = room_name
        self.__expiration = expiration
        self.__idle = idle

        # Create the pipeline (this might take a moment)
        self.__pipeline = Pipeline(device, torch_dtype)
        #print(self.__pipeline.InputParams.schema())

        # Configure logger
        FORMAT = f"%(asctime)s {self.__room_url} %(message)s"
        logging.basicConfig(format=FORMAT)
        self.logger = logging.getLogger("bot-instance")
        self.logger.setLevel(logging.DEBUG)

        self.logger.info(f"Expiration timer set to: {self.__expiration}")

         # Setup camera
        self.setup_camera()

    def run(self, meeting_url, token):
        # Join
        self.logger.info(f"Connecting to room {meeting_url} as {self.__bot_name}")
        self.__client.set_user_name(self.__bot_name)
        self.__client.join(meeting_url, token, completion=self.on_joined)
        
        #self.__participant_id = self.client.participants()["local"]["id"]

        # Start thread
        self.__thread = threading.Thread(target = self.process_frames)
        self.__thread.start()

        # Keep-alive on thread
        self.__thread.join()
 
    def leave(self):
        self.logger.info(f"Leaving...")
        self.__app_quit = True
        self.__thread.join()
        self.__client.leave()

    def on_joined(self, join_data, client_error):
        self.logger.info(f"call_joined: {join_data}, {client_error}")

    def on_participant_joined(self, participant):
        self.logger.info(f"Participant {participant['id']} joined, analyzing frames...")
        self.__client.set_video_renderer(participant["id"], self.on_video_frame, color_format="RGB") 

        # Say hello
        self.wave()

    def setup_camera(self):
        if not self.__camera:
            self.__camera = Daily.create_camera_device("camera",
                                                       width = 640,
                                                       height = 480,
                                                       color_format="RGB")
            self.__client.update_inputs({
                "camera": {
                    "isEnabled": True,
                    "settings": {
                        "deviceId": "camera"
                    }
                }
            })

    def process_frames(self):
        params = Pipeline.InputParams()

        while not self.__app_quit:
            # Is anyone watching?
            if not self.__idle and len(self.__client.participants()) < 2:
                self.logger.info(f"No partcipants in channel. Exiting...")
                self.__app_quit = True
                break
            # Check expiry timer
            if time.time() > self.__expiration:
                self.logger.info(f"Expiration timer exceeded. Exiting...")
                self.__app_quit = True
                break
            try:
                #video_frame = self.__queue.get(timeout=5)
                video_frame = self.__image_buffer

                if not video_frame == None:
                    image = Image.frombytes("RGB", (video_frame.width, video_frame.height), video_frame.buffer)
                    result_image = self.__pipeline.predict(params, image)
                    self.__camera.write_frame(result_image.tobytes())
            except queue.Empty:
                pass

    def on_video_frame(self, participant_id, video_frame):
        # Process ~15 frames per second (considering incoming frames at 30fps).
        if time.time() - self.__time > float(os.getenv("FPS_CAP", 0.0333)):
            self.__time = time.time()
            self.__image_buffer = video_frame
            #self.__queue.put(video_frame)

    def wave(self, emoji="👋"):
        self.__client.send_app_message(
            {
                "event": "sync-emoji-reaction",
                "reaction": {
                    "emoji": emoji,
                    "room": "main-room",
                    "sessionId": "bot",
                    "id": time.time(),
                },
            }
        )

def main():
    parser = argparse.ArgumentParser(description="Daily Bot")
    # Required args
    parser.add_argument("-u", "--url", required=True, type=str, help="URL of the Daily room")
    parser.add_argument("-k", "--api_key", required=True, type=str, help="Daily API key")
    # Optional args
    parser.add_argument("-t", "--private", type=bool, help="Is this room private?", default=True)
    parser.add_argument("-n", "--bot-name", type=str, help="Name of the bot", default="Daily Bot")
    parser.add_argument("-e", "--expiration", type=int, help="Duration of bot", default=os.getenv("BOT_MAX_DURATION", 300))
    parser.add_argument("-i", "--idle", type=bool, help="Wait for participants to join", default=os.getenv("BOT_WILL_IDLE", False))
    args = parser.parse_args()
    
    Daily.init()

    expiration = time.time() + args.expiration
    room_name = get_room_name(args.url)

    # Retrieve a meeting token, if not provided 
    #@TODO do room lookup to check privacy
    if args.private:
        token = get_meeting_token(room_name, args.api_key, expiration)

    app = DailyVision(args.url, room_name, expiration, args.idle, args.bot_name)
    
    try :
        app.run(args.url, token)
    except KeyboardInterrupt:
        print("Ctrl-C detected. Exiting!")
    finally:
        app.leave()

    # Let leave finish
    time.sleep(2)

if __name__ == '__main__':
    main()