import time
from datetime import datetime

from llm_server import opts
from llm_server.database import sum_column
from llm_server.helpers import deep_sort
from llm_server.llm.info import get_running_model
from llm_server.routes.cache import redis
from llm_server.routes.queue import priority_queue
from llm_server.routes.stats import SemaphoreCheckerThread, calculate_avg_gen_time, get_active_gen_workers, get_total_proompts, server_start_time


# TODO: have routes/__init__.py point to the latest API version generate_stats()

def generate_stats():
    model_name, error = get_running_model()  # will return False when the fetch fails
    if isinstance(model_name, bool):
        online = False
    else:
        online = True
        opts.running_model = model_name

    # t = elapsed_times.copy()  # copy since we do multiple operations and don't want it to change
    # if len(t) == 0:
    #     estimated_wait = 0
    # else:
    #     waits = [elapsed for end, elapsed in t]
    #     estimated_wait = int(sum(waits) / len(waits))

    proompters_in_queue = len(priority_queue) + get_active_gen_workers()
    average_tps = float(redis.get('average_tps'))

    if opts.average_generation_time_mode == 'database':
        average_generation_time = int(float(redis.get('average_generation_elapsed_sec')))
        average_output_tokens = int(float(redis.get('average_output_tokens')))
        estimated_wait_sec = int(((average_output_tokens / average_tps) * proompters_in_queue) / opts.concurrent_gens)
    elif opts.average_generation_time_mode == 'minute':
        average_generation_time = int(calculate_avg_gen_time())
        estimated_wait_sec = int((average_generation_time * proompters_in_queue) / opts.concurrent_gens)
    else:
        raise Exception

    output = {
        'stats': {
            'proompts_in_queue': proompters_in_queue,
            'proompters_1_min': SemaphoreCheckerThread.proompters_1_min,
            'proompts': get_total_proompts() if opts.show_num_prompts else None,
            'uptime': int((datetime.now() - server_start_time).total_seconds()) if opts.show_uptime else None,
            'average_generation_elapsed_sec': average_generation_time,
            'average_tps': average_tps,
            'tokens_generated': sum_column('prompts', 'response_tokens') if opts.show_total_output_tokens else None,
        },
        'online': online,
        'endpoints': {
            'blocking': opts.full_client_api,
        },
        'estimated_wait_sec': estimated_wait_sec,
        'timestamp': int(time.time()),
        'config': {
            'gatekeeper': 'none' if opts.auth_required is False else 'token',
            'context_size': opts.context_size,
            'queue_size': opts.concurrent_gens,
            'model': model_name,
            'mode': opts.mode,
        },
        'keys': {
            'openaiKeys': '∞',
            'anthropicKeys': '∞',
        },
    }
    return deep_sort(output)