#!/usr/bin/env python3

import asyncio
import os
import random
import logging
import caribou
import sqlite3
import magic
from datetime import datetime
from aiohttp import web
from pathlib import Path
from library.Emitter import Emitter
from library.config import Config
from library.encoder import Encoder
from library.DownloadQueue import DownloadQueue
from library.Webhooks import Webhooks
from library.HttpSocket import HttpSocket
from library.HttpAPI import HttpAPI
from aiocron import crontab

LOG = logging.getLogger("app")
MIME = magic.Magic(mime=True)


class main:
    config: Config = None
    app: web.Application = None
    http: HttpAPI = None
    socket: HttpSocket = None

    def __init__(self):
        self.config = Config.get_instance()
        self.rootPath = str(Path(__file__).parent.absolute())
        self.app = web.Application()
        self.encoder = Encoder()

        self.checkFolders()
        caribou.upgrade(self.config.db_file, os.path.join(self.rootPath, "migrations"))

        connection = sqlite3.connect(database=self.config.db_file, isolation_level=None)
        connection.row_factory = sqlite3.Row
        connection.execute("PRAGMA journal_mode=wal")

        emitter = Emitter()

        queue = DownloadQueue(emitter=emitter, connection=connection)
        self.app.on_startup.append(lambda _: queue.initialize())

        self.http = HttpAPI(queue=queue, emitter=emitter, encoder=self.encoder)
        self.socket = HttpSocket(queue=queue, emitter=emitter, encoder=self.encoder)

        WebhookFile = os.path.join(self.config.config_path, "webhooks.json")
        if os.path.exists(WebhookFile):
            emitter.add_emitter(Webhooks(WebhookFile).emit)

    def checkFolders(self) -> None:
        try:
            LOG.debug(f"Checking download folder at '{self.config.download_path}'.")
            if not os.path.exists(self.config.download_path):
                LOG.info(f"Creating download folder at '{self.config.download_path}'.")
                os.makedirs(self.config.download_path, exist_ok=True)
        except OSError as e:
            LOG.error(
                f"Could not create download folder at '{self.config.download_path}'."
            )
            raise e

        try:
            LOG.debug(f"Checking temp folder at '{self.config.temp_path}'.")
            if not os.path.exists(self.config.temp_path):
                LOG.info(f"Creating temp folder at '{self.config.temp_path}'.")
                os.makedirs(self.config.temp_path, exist_ok=True)
        except OSError as e:
            LOG.error(f"Could not create temp folder at '{self.config.temp_path}'.")
            raise e

        try:
            LOG.debug(f"Checking config folder at '{self.config.config_path}'.")
            if not os.path.exists(self.config.config_path):
                LOG.info(f"Creating config folder at '{self.config.config_path}'.")
                os.makedirs(self.config.config_path, exist_ok=True)
        except OSError as e:
            LOG.error(f"Could not create config folder at '{self.config.config_path}'.")
            raise e

        try:
            LOG.debug(f"Checking database file at '{self.config.db_file}'.")
            if not os.path.exists(self.config.db_file):
                LOG.info(f"Creating database file at '{self.config.db_file}'.")
                with open(self.config.db_file, "w") as _:
                    pass
        except OSError as e:
            LOG.error(f"Could not create database file at '{self.config.db_file}'.")
            raise e

    async def cron_runner(self, task: dict):
        try:
            taskName = task.get("name", task.get("url"))
            timeNow = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            LOG.info(f"Started 'Task: {taskName}' at '{timeNow}'.")
            await self.socket.add(
                url=task.get("url"),
                preset=task.get("preset", "default"),
                folder=task.get("folder"),
                ytdlp_cookies=task.get("ytdlp_cookies"),
                ytdlp_config=task.get("ytdlp_config"),
                output_template=task.get("output_template"),
            )
            timeNow = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            LOG.info(f"Completed 'Task: {taskName}' at '{timeNow}'.")
        except Exception as e:
            timeNow = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            LOG.error(
                f"Failed 'Task: {taskName}' at '{timeNow}'. Error message '{str(e)}'."
            )

    def load_tasks(self):
        for task in self.config.tasks:
            if not task.get("url"):
                LOG.warning(f"Invalid task '{task}'. No URL found.")
                continue

            cron_timer: str = task.get("timer", f"{random.randint(1,59)} */1 * * *")

            crontab(
                spec=cron_timer,
                func=self.cron_runner,
                args=(task,),
                start=True,
                loop=asyncio.get_event_loop(),
            )

            LOG.info(
                f"Added 'Task: {task.get('name', task.get('url'))}' to be executed every '{cron_timer}'."
            )

    def start(self):
        self.socket.attach(self.app)
        self.http.attach(self.app)

        self.load_tasks()

        start: str = f"YTPTube v{self.config.version} - started on http://{self.config.host}:{self.config.port}"
        web.run_app(
            self.app,
            host=self.config.host,
            port=self.config.port,
            reuse_port=True,
            loop=asyncio.get_event_loop(),
            access_log=None,
            print=lambda _: LOG.info(start),
        )


if __name__ == "__main__":
    logging.basicConfig(level=logging.DEBUG)
    main().start()