from functools import lru_cache

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        extra="ignore",
    )

    kafka_bootstrap_servers: str = "localhost:19092"
    kafka_raw_topic: str = "cdr.raw"

    api_queue_size: int = 10_000

    kafka_delivery_timeout_seconds: float = 4.0
    kafka_message_timeout_ms: int = 3_000

    kafka_linger_ms: int = 5
    kafka_batch_size: int = 131_072
    kafka_producer_max_messages: int = 100_000

    kafka_dlq_topic: str = "cdr.raw.dlq"
    kafka_consumer_group: str = "cdr-processing-workers"
    kafka_auto_offset_reset: str = "earliest"

    kafka_consumer_poll_timeout_seconds: float = 1.0
    kafka_dlq_delivery_timeout_seconds: float = 5.0

    worker_instance_id: str = "worker-1"

    clickhouse_host: str = "localhost"
    clickhouse_port: int = 8123
    clickhouse_database: str = "telecom"
    clickhouse_user: str = "telecom"
    clickhouse_password: str = ""

    batch_size: int = 1_000
    batch_flush_interval_seconds: float = 2.0


@lru_cache
def get_settings() -> Settings:
    return Settings()