import traceback
import json

import tornado.gen
import tornado.web

from web import asyncTornado
from constants import argumentTypes

from objects import glob

ARGS = {
	("file_hash", "file_version", "timestamp"): argumentTypes.one_required
}

SQL_STRUCT = {
	"main": "SELECT %s FROM updates WHERE filename = 'osu!.exe' ORDER BY file_version"
}

class handler(asyncTornado.asyncRequestHandler):
	@tornado.web.asynchronous
	@tornado.gen.engine
	def asyncGet(self):
		status_code = 400
		data = {}
		try:
			args_filter = asyncTornado.check_arguments(self.request.arguments, ARGS)
			if not args_filter:
				raise Exception("Missing required arguments")

			conn = glob.new_sql()
			cur = conn.cursor()

			sql = SQL_STRUCT["main"]

			cur.execute(sql % ",".join(args_filter))
			data = cur.fetchall()

			cur.close()
			conn.close()

			status_code = 200
		except Exception as e:
			status_code = 400
			data["status"] = status_code
			data["message"] = str(e)
			print("Err: %s" % e)
			traceback.print_exc()
		finally:
			self.write( json.dumps(data) )
			self.set_header("Content-Type", "application/json")
			self.set_status(status_code)