#!/usr/bin/python
from http.server import BaseHTTPRequestHandler, HTTPServer
import cgi
import docker
import json
from urllib import parse

PORT_NUMBER = 8000


# This class will handles any incoming request from
# the browser
class MyHandler(BaseHTTPRequestHandler):
	# Handler for the GET requests
	def do_GET(self):
		req = parse.urlparse(self.path)
		query = parse.parse_qs(req.query)

		if req.path == "/ping":
			# Open the static file requested and send it
			self.send_response(200)
			self.send_header('Content-type', 'application/json')
			self.end_headers()
			self.wfile.write(bytes("pong", "utf-8"))

		elif req.path == "/logs":
			try:
				container_id = query['id'][0]
				client = docker.from_env()
				container = client.containers.get(container_id)
				msg = {'code': 0, 'logs': str(container.logs().decode())}
			except Exception as e:
				msg = {'code': 0, 'error': str(e)}
			self.send_response(200)
			self.send_header('Content-type', 'application/json')
			self.end_headers()
			self.wfile.write(bytes(json.dumps(msg), "utf-8"))

		elif req.path == "/status":
			container_id = query['id'][0]
			client = docker.from_env()
			container = client.containers.list(all=True, filters={'id': container_id})
			if len(container) > 0:
				container = container[0]
				status = {
					'id': container.short_id,
					'image': container.attrs['Config']['Image'],
					'image_digest': container.attrs['Image'],
					'command': container.attrs['Config']['Cmd'],
					'created_at': container.attrs['Created'],
					'finished_at': container.attrs['State']['FinishedAt'],
					'status': container.status
				}
				if status['command'] is not None:
					status['command'] = ' '.join(container.attrs['Config']['Cmd'])
				msg = {'code': 0, 'status': status}
			else:
				msg = {'code': 1, 'error': "container not exist"}
			self.send_response(200)
			self.send_header('Content-type', 'application/json')
			self.end_headers()
			self.wfile.write(bytes(json.dumps(msg), "utf-8"))

		else:
			self.send_error(404, 'File Not Found: %s' % self.path)

	# Handler for the POST requests
	def do_POST(self):
		if self.path == "/create":
			form = cgi.FieldStorage(
				fp=self.rfile,
				headers=self.headers,
				environ={
					'REQUEST_METHOD': 'POST',
					'CONTENT_TYPE': self.headers['Content-Type'],
				})
			docker_image = form["image"].value
			docker_cmd = form["cmd"].value

			try:
				client = docker.from_env()
				container = client.containers.run(
					image=docker_image,
					command=docker_cmd,
					environment={"key": "value"},
					runtime="nvidia",
					detach=True
				)
				msg = {"code": 0, "id": container.id}
			except Exception as e:
				msg = {"code": 1, "error": str(e)}

			self.send_response(200)
			self.send_header('Content-type', 'application/json')
			self.end_headers()
			self.wfile.write(bytes(json.dumps(msg), "utf-8"))

		elif self.path == "/stop":
			form = cgi.FieldStorage(
				fp=self.rfile,
				headers=self.headers,
				environ={
					'REQUEST_METHOD': 'POST',
					'CONTENT_TYPE': self.headers['Content-Type'],
				})
			container_id = form["id"].value

			client = docker.from_env()
			container = client.containers.get(container_id)
			container.stop()
			msg = {"code": 0}

			self.send_response(200)
			self.send_header('Content-type', 'application/json')
			self.end_headers()
			self.wfile.write(bytes(json.dumps(msg), "utf-8"))
		else:
			self.send_error(404, 'File Not Found: %s' % self.path)


try:
	# Create a web server and define the handler to manage the
	# incoming request
	server = HTTPServer(('', PORT_NUMBER), MyHandler)
	print('Started http server on port ', PORT_NUMBER)

	# Wait forever for incoming http requests
	server.serve_forever()

except KeyboardInterrupt:
	print('^C received, shutting down the web server')

server.socket.close()