import os
import logging
from confluent_kafka.schema_registry import SchemaRegistryClient
from confluent_kafka.schema_registry.error import SchemaRegistryError

class SchemaClient:
    def __init__(self, schema_url, schema_subject_name):
        self.schema_url = schema_url
        self.schema_subject_name = schema_subject_name
        self.schema_registry_client = SchemaRegistryClient({"url": self.schema_url})

    def get_schema_str(self):
        try:
            schema_version = self.schema_registry_client.get_latest_version(
                self.schema_subject_name
            )
            schema_id = schema_version.schema_id
            schema = self.schema_registry_client.get_schema(schema_id)
            logging.info(
                f"Schema ID for {self.schema_subject_name}: {schema_id}"
            )
            return schema.schema_str
        except SchemaRegistryError as e:
            logging.error(f"Error fetching schema: {e}")
            return None

    def set_compatibility(self, compatibility_level):
        try:
            self.schema_registry_client.set_compatibility(
                self.schema_subject_name, compatibility_level
            )
            logging.info(f"Compatibility level set to {compatibility_level}")
        except SchemaRegistryError as e:
            logging.error(e)
            exit(1)