from typing import Any, Self

from fansifter_common.adapters.aws.secretsmanager import SecretsManager
from fansifter_common.constants import PROD_ENVIRONMENT, QA_ENVIRONMENT
from fansifter_common.utils.functional import lazy_proxy
from pydantic import Field, ValidationError, model_validator
from pydantic_settings import BaseSettings, SettingsConfigDict
from sqlalchemy import URL


class Settings(BaseSettings):
    environment: str
    debug: bool = Field(validation_alias="APP_DEBUG", default=False)

    service_name: str = "lambda-audience-twilio-webhooks-outbound"
    service_version: str = "0.1.0"

    # Kafka
    kafka_bootstrap_servers: str = "localhost"
    kafka_event_topic: str = "event.twilio.webhook.outbound"
    kafka_use_ssl: bool = True

    # AWS
    aws_region_name: str = "us-east-1"
    kms_key_id: str = ""

    # Postgres
    postgres_username: str = "postgres"
    postgres_password: str = "postgres"
    postgres_host: str = "localhost"
    postgres_port: int = 5432
    postgres_name: str = "dmp"
    postgres_password_secret_name: str = ""
    postgres_engine_args: dict[str, Any] = {}

    @property
    def postgres_url(self) -> URL:
        if self.environment in [QA_ENVIRONMENT, PROD_ENVIRONMENT]:
            secrets_manager = SecretsManager(region_name=self.aws_region_name)
            postgres_password = secrets_manager.get_secret(
                self.postgres_password_secret_name
            )
        else:
            postgres_password = self.postgres_password

        return URL.create(
            drivername="postgresql+psycopg",
            username=self.postgres_username,
            password=postgres_password,
            host=self.postgres_host,
            port=self.postgres_port,
            database=self.postgres_name,
        )

    # Logging
    logging_debug: bool = Field(validation_alias="LOGGING_DEBUG", default=False)

    @property
    def logging_config(self) -> dict[str, Any]:
        return {
            "version": 1,
            "disable_existing_loggers": True,
            "formatters": {
                "json": {
                    "()": "owslogger.logger.DDJsonFormatter",
                    "service_name": self.service_name,
                    "service_version": self.service_version,
                    "env": self.environment,
                },
                "console": {
                    "()": "fansifter_common.logging.ConsoleFormatter",
                },
            },
            "filters": {
                "require_debug_true": {
                    "()": "fansifter_common.logging.RequireDebugTrueFilter",
                    "value": self.logging_debug,
                },
                "require_debug_false": {
                    "()": "fansifter_common.logging.RequireDebugFalseFilter",
                    "value": self.logging_debug,
                },
            },
            "handlers": {
                "stream": {
                    "level": "INFO",
                    "class": "logging.StreamHandler",
                    "formatter": "json",
                    "filters": ["require_debug_false"],
                },
                "rich": {
                    "level": "INFO",
                    "class": "rich.logging.RichHandler",
                    "filters": ["require_debug_true"],
                    "formatter": "console",
                },
            },
            "loggers": {
                "app": {
                    "handlers": ["stream", "rich"],
                    "level": "INFO",
                    "propagate": False,
                },
                "httpx": {
                    "handlers": ["stream", "rich"],
                    "level": "WARNING",
                    "propagate": False,
                },
                "sqlalchemy.engine": {
                    "handlers": ["stream", "rich"],
                    "level": "WARNING",
                    "propagate": False,
                },
            },
        }

    # Sentry
    sentry_dsn: str | None = None

    @model_validator(mode="after")
    def _setup_sentry_dsn(self) -> Self:
        if not self.sentry_dsn and self.environment in [
            QA_ENVIRONMENT,
            PROD_ENVIRONMENT,
        ]:
            raise ValueError(f"Sentry is not configured in {self.environment}.")
        return self

    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        case_sensitive=False,
        extra="allow",
    )


def initialize_settings(**defaults: Any) -> Settings:
    try:
        return Settings(**defaults)
    except ValidationError as exc:
        errors = "\n".join(
            [
                f" * {'.'.join(map(str, error['loc']))} - {error['msg']}"
                for error in exc.errors()
            ]
        )
        raise RuntimeError(f"Failed to initialize settings:\n {errors}") from exc


# Lazy proxy for settings
settings = lazy_proxy(initialize_settings)