"""Memory System Configuration"""
import os
import json


class Config:
    # MySQL
    MYSQL_HOST = os.getenv("MYSQL_HOST", "127.0.0.1")
    MYSQL_PORT = int(os.getenv("MYSQL_PORT", "3306"))
    MYSQL_USER = os.getenv("MYSQL_USER", "your_db_user")
    MYSQL_PASSWORD = os.getenv("MYSQL_PASSWORD", "CHANGE_ME_MYSQL_PASSWORD")
    MYSQL_DATABASE = os.getenv("MYSQL_DATABASE", "memory_system")
    MYSQL_CHARSET = "utf8mb4"
    MYSQL_UNIX_SOCKET = os.getenv("MYSQL_UNIX_SOCKET", "/var/run/mysqld/mysqld.sock")

    # Redis
    REDIS_HOST = os.getenv("REDIS_HOST", "127.0.0.1")
    REDIS_PORT = int(os.getenv("REDIS_PORT", "6379"))
    REDIS_PASSWORD = os.getenv("REDIS_PASSWORD", "CHANGE_ME_REDIS_PASSWORD")
    REDIS_DB = int(os.getenv("REDIS_DB", "0"))

    # BGE Embedding Service
    EMBEDDING_SERVICE_URL = os.getenv("EMBEDDING_SERVICE_URL", "http://127.0.0.1:8080")
    EMBEDDING_DIM = 512

    # Working memory TTL (seconds)
    WORKING_MEMORY_TTL = int(os.getenv("WORKING_MEMORY_TTL", "259200"))  # 72h

    # Cleanup defaults
    CLEANUP_MAX_AGE_DAYS = 90
    CLEANUP_MIN_IMPORTANCE = 0.2

    # API
    API_HOST = os.getenv("API_HOST", "127.0.0.1")
    API_PORT = int(os.getenv("API_PORT", "8081"))

    # LLM providers (JSON list, priority=1 is primary, higher = fallback)
    LLM_PROVIDERS_JSON = os.getenv("LLM_PROVIDERS", "[]")

    @property
    def llm_providers(self) -> list:
        try:
            val = self.LLM_PROVIDERS_JSON
            providers = json.loads(val) if val else []
            for p in providers:
                key = p.get("api_key", "")
                if isinstance(key, str) and key.startswith("${") and key.endswith("}"):
                    p["api_key"] = os.getenv(key[2:-1], "") or ""
            return providers
        except (json.JSONDecodeError, TypeError):
            return []