#!/usr/bin/env python3

import connexion
import logging 

# from published_apis import encoder
import encoder

from flask_jwt_extended import JWTManager, jwt_required, create_access_token
from config import Config
from logging.handlers import RotatingFileHandler
from core.consumer_messager import Subscriber

import os
from fluent import sender
from flask_executor import Executor
from opentelemetry.instrumentation.flask import FlaskInstrumentor
from opentelemetry import trace
from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
from opentelemetry.trace.propagation.tracecontext import TraceContextTextMapPropagator
from opentelemetry.sdk.resources import Resource
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor
from opentelemetry.instrumentation.redis import RedisInstrumentor

NAME = "Publish-Service"

# Setting log level
log_level = os.getenv('LOG_LEVEL', 'INFO').upper()
numeric_level = getattr(logging, log_level, logging.INFO)

def configure_monitoring(app, config):

    resource = Resource(attributes={"service.name": NAME})

    fluent_bit_host = config['monitoring']['fluent_bit_host']
    fluent_bit_port = config['monitoring']['fluent_bit_port']
    fluent_bit_sender = sender.FluentSender('Publish-Service', host=fluent_bit_host, port=fluent_bit_port)
    propagator = TraceContextTextMapPropagator()

    tracer_provider = TracerProvider(resource=resource)
    trace.set_tracer_provider(tracer_provider)
    exporter = OTLPSpanExporter(endpoint=f"http://{config['monitoring']['opentelemetry_url']}:{config['monitoring']['opentelemetry_port']}", insecure=True)
    span_processor = BatchSpanProcessor(
        exporter,
        max_queue_size=config['monitoring']['opentelemetry_max_queue_size'],
        schedule_delay_millis=config['monitoring']['opentelemetry_schedule_delay_millis'],
        max_export_batch_size=config['monitoring']['opentelemetry_max_export_batch_size'],
        export_timeout_millis=config['monitoring']['opentelemetry_export_timeout_millis'],
    )

    trace.get_tracer_provider().add_span_processor(span_processor)

    FlaskInstrumentor().instrument_app(app)

    RedisInstrumentor().instrument()

    class FluentBitHandler(logging.Handler):

        def __init__(self):
            logging.Handler.__init__(self)

        def emit(self, record):
            log_entry = self.format(record)
            log_data = {
                'message': log_entry,
                'level': record.levelname,
                'timestamp': record.created,
                'logger': record.name,
                'function': record.funcName,
                'line': record.lineno,
                'container_name': os.environ.get('CONTAINER_NAME', ''),
            }

            # # Obtener el trace ID actual
            current_context = trace.get_current_span().get_span_context()

            trace_id = current_context.trace_id
            traceparent_id = current_context.span_id
            log_data['traceID'] = hex(trace_id)[2:]
            if traceparent_id != None:
                log_data['traceparent'] = hex(traceparent_id)[2:]
            fluent_bit_sender.emit('Publish-Service', log_data)

    loggers = [app.logger, ]
    for l in loggers:
         l.addHandler(FluentBitHandler())


def configure_logging(app):
    del app.logger.handlers[:]
    loggers = [app.logger, ]
    handlers = []
    console_handler = logging.StreamHandler()
    console_handler.setLevel(numeric_level)
    console_handler.setFormatter(verbose_formatter())
    file_handler = RotatingFileHandler(filename="publish_logs.log", maxBytes=1024 * 1024 * 100, backupCount=20)
    file_handler.setLevel(numeric_level)
    file_handler.setFormatter(verbose_formatter())
    handlers.append(console_handler)
    handlers.append(file_handler)


    for l in loggers:
        for handler in handlers:
            l.addHandler(handler)
        l.propagate = False
        l.setLevel(numeric_level)


def verbose_formatter():
    return logging.Formatter(
        '{"timestamp": "%(asctime)s", "level": "%(levelname)s", "logger": "%(name)s", "function": "%(funcName)s", "line": %(lineno)d, "message": %(message)s}',
        datefmt='%d/%m/%Y %H:%M:%S'
    )


app = connexion.App(__name__, specification_dir='openapi/')
app.app.json_encoder = encoder.CustomJSONEncoder
app.add_api('openapi.yaml',
            arguments={'title': 'CAPIF_Publish_Service_API'},
            pythonic_params=True)

app.app.config["JWT_SECRET_KEY"] = "this-is-secret-key"

config = Config()

jwt = JWTManager(app.app)
configure_logging(app.app)

monitoring_value = os.environ.get("MONITORING", "").lower()
if monitoring_value == "true":
    configure_monitoring(app.app, config.get_config())

executor = Executor(app.app)
subscriber = Subscriber()

first = True

@app.app.before_request
def up_listener():
    global first
    if first:
        executor.submit(subscriber.listen)
        first = False
