#!/usr/bin/env python3
import logging
import os
import socket
import threading
import time
import yaml
from lib.job_server import server
from lib.render_queue import RenderQueue


def start_server(background_thread=False):
    def eval_loop(delay_sec=1):
        while True:
            RenderQueue.evaluate_queue()
            time.sleep(delay_sec)

    with open('config.yaml') as f:
        config = yaml.load(f, Loader=yaml.FullLoader)

    logging.basicConfig(format='%(asctime)s: %(levelname)s: %(module)s: %(message)s', datefmt='%d-%b-%y %H:%M:%S',
                        level=config.get('server_log_level', 'INFO').upper())

    server.config['UPLOAD_FOLDER'] = os.path.expanduser(config['upload_folder'])
    server.config['MAX_CONTENT_PATH'] = config['max_content_path']

    # Get hostname and render clients
    RenderQueue.host_name = socket.gethostname()
    server.config['HOSTNAME'] = RenderQueue.host_name
    if not RenderQueue.render_clients:
        RenderQueue.render_clients = [RenderQueue.host_name]

    # disable most Flask logging
    flask_log = logging.getLogger('werkzeug')
    flask_log.setLevel(config.get('flask_log_level', 'ERROR').upper())

    # Set up the RenderQueue object
    RenderQueue.load_state()

    thread = threading.Thread(target=eval_loop, kwargs={'delay_sec': config.get('queue_eval_seconds', 1)}, daemon=True)
    thread.start()

    logging.info(f"Starting Zordon Render Server - Hostname: '{RenderQueue.host_name}'")

    if background_thread:
        server_thread = threading.Thread(
            target=lambda: server.run(host='0.0.0.0', port=RenderQueue.port, debug=False, use_reloader=False))
        server_thread.start()
        server_thread.join()
    else:
        server.run(host='0.0.0.0', port=RenderQueue.port, debug=config.get('flask_debug_enable', False),
                   use_reloader=True, threaded=True)


if __name__ == '__main__':
    start_server()