#!/usr/bin/python3
from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
from markupsafe import escape
from argparse import ArgumentParser
from ythdd_globals import colors
import requests, json, toml, time
import views, downloader, ythdd_api, ythdd_globals, ythdd_db
import os
from flask_apscheduler import APScheduler

app      = Flask(__name__)
app_host = "None"
app_port = "None"

def setup():

	# sanity check: make sure config is set
	# required to make `flask --app ythdd run --debug` work
	global config, app_host, app_port
	try:
		if not config['general']:
			ythdd_globals.setConfig(ythdd_globals.configfile)
			config = ythdd_globals.config
	except:
		ythdd_globals.setConfig(ythdd_globals.configfile)
		config = ythdd_globals.config

	# setting all the variables
	ythdd_globals.starttime = int(time.time())
	ythdd_globals.realUptime = 0
	ythdd_globals.apiRequests = 0
	ythdd_globals.apiFailedRequests = 0
	ythdd_globals.isProxied = config['general']['is_proxied']
	ythdd_globals.outsideApiHits = 0

	are_we_sure_of_host_and_port = True
	if app_host == "None":
		app_host = "127.0.0.1"
		are_we_sure_of_host_and_port = False
	if app_port == "None":
		app_port = "5000"
		are_we_sure_of_host_and_port = False

	public_facing_url = config['general']['public_facing_url']
	rewrite_sanity_check = public_facing_url.replace(f"{app_host}:{app_port}", "")
	if not config['general']['is_proxied'] and public_facing_url == rewrite_sanity_check:
		sanity_string  = f"{colors.WARNING}Heads up!{colors.ENDC} Public facing URL does not match the IP and port the server is running on.\n"
		sanity_string += f"          Expected: {colors.OKCYAN}{config['general']['public_facing_url']}{colors.ENDC}, but" 
		if not are_we_sure_of_host_and_port: sanity_string += " (assuming it's)"
		sanity_string += f" running on: {colors.OKCYAN}{app_host}:{app_port}{colors.ENDC}.\n"
		sanity_string += f"          This is just a sanity check and may not neccessarily mean bad configuration.\n"
		sanity_string += f"          If you're running a reverse proxy, set {colors.OKCYAN}is_proxied{colors.ENDC} to true to silence this message.\n"
		print(sanity_string)

	# Should work around disconnects: https://stackoverflow.com/a/61739721
	app.config['SQLALCHEMY_ENGINE_OPTIONS'] = {"pool_pre_ping": True}

	app.config['SQLALCHEMY_DATABASE_URI'] = f"sqlite:///{config['general']['db_file_path']}"
	app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
	app.add_url_rule('/', view_func=views.index)
	app.add_url_rule('/index.html', view_func=views.index)
	app.add_url_rule('/home', view_func=views.home)
	app.add_url_rule('/api/', view_func=ythdd_api.api_greeting)
	app.add_url_rule('/api/<path:received_request>', view_func=ythdd_api.api_global_catchall)
	app.add_url_rule('/vi/<path:received_request>', view_func=views.thumbnailProxy)
	app.add_url_rule('/ggpht/<path:received_request>', view_func=views.ggphtProxy)
	app.add_url_rule('/guc/<path:received_request>', view_func=views.gucProxy)
	app.add_url_rule('/img/<path:received_request>', view_func=views.imgProxy)
	db = ythdd_db.initDB(app, config)

	with app.app_context():
		db.create_all()

	# job scheduler for repetetive tasks
	scheduler = APScheduler()
	scheduler.add_job(func=every5seconds, trigger='interval', id='job', seconds=5)
	scheduler.start()

# gets called every 5 seconds
def every5seconds():
	# update the "real" uptime counter
	ythdd_globals.realUptime += 5

@app.route('/<string:val>', methods=['GET'])
def blank(val):
	return f"{val}: not implemented in ythdd {ythdd_globals.version}"
	#users = db.session.query(LocalUsers).all()
	#return users

def main(args):
	print(f"{colors.BOLD + colors.HEADER}Welcome to ythdd ({ythdd_globals.version})!{colors.ENDC}")
	print(f"To run in development mode (to see changes updated live), use: {colors.OKCYAN}flask --app ythdd run --debug{colors.ENDC}.")
	print("To run locally, use IP 127.0.0.1. To run on all interfaces, use 0.0.0.0.\n")
	try:
		host = args.ip
		port = args.port
		if not host or not port:
			raise Exception 
	except:
		print("Enter hostname:port to run Flask app on [127.0.0.1:5000]:")
		try:
			host_port = input('> ').split(':')
			if host_port == ['']:
				host_port = ['127.0.0.1', '5000'] # defaults

		except KeyboardInterrupt:
			print(" ...exiting gracefully."), quit() # handle Ctrl+C

		host = host_port[0]
		port = host_port[1]
	
	global config, app_host, app_port
	try:
		# if specified, use custom config file
		ythdd_globals.configfile = args.config
		ythdd_globals.setConfig(ythdd_globals.configfile)

	except:
		# if not, try using the default "config.toml"
		if os.path.exists("config.toml"):
			ythdd_globals.configfile = "config.toml"
		else:
			# unless it's not there, if that's the case then use the dummy file
			ythdd_globals.configfile = ""
		# but try to set the API secret if provided by the user
		if args.secret:
			ythdd_globals.randomly_generated_passcode = args.secret
		ythdd_globals.setConfig(ythdd_globals.configfile)

	config = ythdd_globals.config

	app_host = host
	app_port = port

	setup()
	app.run(host=host, port=int(port))

if __name__ == "__main__":
	#app.run(host="127.0.0.1", port=5000)
	#app.run(host="0.0.0.0", port=5000)
	parser = ArgumentParser(description='A basic yt_dlp-based script for video download.')

	parser.add_argument("-i", "--ip",     dest="ip",     help="ip address/interface to bind to")
	parser.add_argument("-p", "--port",   dest="port",   help="port on which the flask web backend should be ran")
	parser.add_argument("-c", "--config", dest="config", help="path to TOML config file")
	parser.add_argument("-s", "--secret", dest="secret", help="admin's secret passcode for sensitive API access")

	args = parser.parse_args()

	main(args)

else:
	app_host = os.getenv("FLASK_RUN_HOST", "None")
	app_port = os.getenv("FLASK_RUN_PORT", "None")
	setup()