import os
import sys
from pathlib import Path
from threading import Thread

import config
from flask import Flask, jsonify

from llm_server import opts
from llm_server.config import ConfigLoader, config_default_vars, config_required_vars
from llm_server.database import get_number_of_rows, init_db
from llm_server.helpers import resolve_path
from llm_server.routes.cache import cache, redis
from llm_server.routes.helpers.http import cache_control
from llm_server.routes.queue import start_workers
from llm_server.routes.stats import SemaphoreCheckerThread, elapsed_times_cleanup, process_avg_gen_time
from llm_server.routes.v1 import bp

script_path = os.path.dirname(os.path.realpath(__file__))

config_path_environ = os.getenv("CONFIG_PATH")
if config_path_environ:
    config_path = config_path_environ
else:
    config_path = Path(script_path, 'config', 'config.yml')

config_loader = ConfigLoader(config_path, config_default_vars, config_required_vars)
success, config, msg = config_loader.load_config()
if not success:
    print('Failed to load config:', msg)
    sys.exit(1)

# Resolve relative directory to the directory of the script
if config['database_path'].startswith('./'):
    config['database_path'] = resolve_path(script_path, config['database_path'].strip('./'))

opts.database_path = resolve_path(config['database_path'])
init_db()

if config['mode'] not in ['oobabooga', 'hf-textgen']:
    print('Unknown mode:', config['mode'])
opts.mode = config['mode']
opts.auth_required = config['auth_required']
opts.log_prompts = config['log_prompts']
opts.concurrent_gens = config['concurrent_gens']
opts.frontend_api_client = config['frontend_api_client']
opts.context_size = config['token_limit']
opts.show_num_prompts = config['show_num_prompts']
opts.show_uptime = config['show_uptime']
opts.backend_url = config['backend_url'].strip('/')

opts.verify_ssl = config['verify_ssl']
if not opts.verify_ssl:
    import urllib3

    urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

flushed_keys = redis.flush()
print('Flushed', len(flushed_keys), 'keys from Redis.')

if config['load_num_prompts']:
    redis.set('proompts', get_number_of_rows('prompts'))

start_workers(opts.concurrent_gens)

# cleanup_thread = Thread(target=elapsed_times_cleanup)
# cleanup_thread.daemon = True
# cleanup_thread.start()
# Start the background thread
process_avg_gen_time_background_thread = Thread(target=process_avg_gen_time)
process_avg_gen_time_background_thread.daemon = True
process_avg_gen_time_background_thread.start()
SemaphoreCheckerThread().start()

app = Flask(__name__)
cache.init_app(app)
cache.clear()  # clear redis cache
# with app.app_context():
#     current_app.tokenizer = tiktoken.get_encoding("cl100k_base")
app.register_blueprint(bp, url_prefix='/api/v1/')


# print(app.url_map)


@app.route('/')
@app.route('/<first>')
@app.route('/<first>/<path:rest>')
@cache_control(-1)
def fallback(first=None, rest=None):
    return jsonify({
        'error': 404,
        'msg': 'not found'
    }), 404


if __name__ == "__main__":
    app.run(host='0.0.0.0')