import environ
import copy
import os

import django
from celery import Celery
from celery.signals import setup_logging, worker_process_init # noqa
from kombu import Exchange, Queue
from opentelemetry import metrics, trace
from opentelemetry.exporter.otlp.proto.http.metric_exporter import \
    OTLPMetricExporter
from opentelemetry.exporter.otlp.proto.http.trace_exporter import \
    OTLPSpanExporter
from opentelemetry.instrumentation.celery import CeleryInstrumentor
from opentelemetry.instrumentation.django import DjangoInstrumentor
from opentelemetry.sdk.metrics import MeterProvider
from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader
from opentelemetry.sdk.resources import SERVICE_NAME, Resource
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor

from django.conf import settings

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "fwd.settings")
django.setup()

env = environ.Env(
    DEBUG=(bool, False)
)

tracer_endpoint = env.str("tracer_endpoint", "http://jaeger_collector:4318")
service_name = "sbt_celery_backend"

@worker_process_init.connect(weak=False)
def init_celery_tracing(*args, **kwargs):
    CeleryInstrumentor().instrument()
    span_exporter = OTLPSpanExporter(endpoint=f"{tracer_endpoint}/v1/traces")
    processor = BatchSpanProcessor(span_exporter=span_exporter)
    
    attributes = {SERVICE_NAME: service_name}
    resource = Resource(attributes=attributes)
    trace_provider = TracerProvider(resource=resource)
    trace_provider.add_span_processor(span_processor=processor)
    trace.set_tracer_provider(tracer_provider=trace_provider)

    reader = PeriodicExportingMetricReader(OTLPMetricExporter(endpoint=f"{tracer_endpoint}/v1/metrics"))
    meter_provider = MeterProvider(resource=resource, metric_readers=[reader])
    metrics.set_meter_provider(meter_provider=meter_provider)

app: Celery = Celery(
    'postman',
    broker=settings.BROKER_URL,
    include=['fwd_api.celery_worker.process_result_tasks', 'fwd_api.celery_worker.internal_task', 'fwd_api.celery_worker.process_report_tasks'],
    broker_transport_options={'confirm_publish': False},
)

app.config_from_object("django.conf:settings", namespace="CELERY")
app.autodiscover_tasks()

@setup_logging.connect
def config_loggers(*args, **kwargs):
    from logging.config import dictConfig  # noqa

    from django.conf import settings  # noqa

    log_config = copy.deepcopy(settings.LOGGING)
    if log_config.get("handlers", {}).get("file", {}).get("filename", None):
        log_config["handlers"]["file"]["filename"] = log_config["handlers"]["file"]["filename"].replace(".log", "_celery.log")
    dictConfig(log_config)

app.conf.update({
    'task_queues':
    [
        Queue('invoice_sap_rs'),
        Queue('invoice_fi_rs'),
        Queue('invoice_manulife_rs'),
        Queue('invoice_sbt_rs'),
        Queue('do_pdf'),
        Queue('upload_file_to_s3'),
        Queue('upload_feedback_to_s3'),
        Queue('upload_obj_to_s3'),
        Queue('upload_report_to_s3'),
        Queue('remove_local_file'),
        Queue('csv_feedback'),
        Queue('report'),
        Queue('report_2'),
    ],
    'task_routes': {
        'process_sap_invoice_result': {'queue': 'invoice_sap_rs'},
        'process_sap_invoice': {'queue': "invoice_sap"},
        'process_fi_invoice_result': {'queue': 'invoice_fi_rs'},
        'process_fi_invoice': {'queue': "invoice_fi"},    
        'process_manulife_invoice_result': {'queue': 'invoice_manulife_rs'},
        'process_manulife_invoice': {'queue': "invoice_manulife"},
        'process_sbt_invoice_result': {'queue': 'invoice_sbt_rs'},
        'process_sbt_invoice': {'queue': "invoice_sbt"},
        'do_pdf': {'queue': "do_pdf"},   
        'upload_file_to_s3': {'queue': "upload_file_to_s3"},   
        'upload_feedback_to_s3': {'queue': "upload_feedback_to_s3"},   
        'upload_obj_to_s3': {'queue': "upload_obj_to_s3"},     
        'upload_report_to_s3': {'queue': "upload_report_to_s3"},
        'remove_local_file': {'queue': "remove_local_file"},   
        'csv_feedback': {'queue': "csv_feedback"},   
        'make_a_report': {'queue': "report"},   
        'make_a_report_2': {'queue': "report_2"},   
        }
})