import os
from functools import lru_cache
from pydantic_settings import BaseSettings, SettingsConfigDict
from pathlib import Path
from typing import Optional



class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", extra="ignore")
    jwtKey: Optional[str] = ""
    is_mode_develop: int = 0

    # Elasticsearch connection
    elasticsearch_url: str = "http://localhost:9200" 
    elasticsearch_username: Optional[str] = None 
    elasticsearch_password: Optional[str] = None 
    elasticsearch_verify_certs: Optional[bool]  = False
    elasticsearch_ca_certs_path: Optional[str] = None 
    
    ai_rag_host: Optional[str] = None 
    ai_rag_host_gpu: Optional[str] = None 
    
    backup_file: Optional[str] = None 
    
    
    # Config base path where per-type configs live
    config_base_path: str = "app/configs"
    enable_back_permition: bool = False

    # Networking
    request_timeout_seconds: int = 30
    disable_es_startup: bool = False
    base_project:Path =  Path(__file__).resolve().parent.parent.parent
    
    current_user_id:Optional[int] = 0
    

    permit_type:Optional[str] = "DB"
    permit_db_type:Optional[str] = "mysql"
    permit_database_user:Optional[str] = None 
    permit_database_password:Optional[str] = None 
    permit_database_host:Optional[str] = None 
    permit_database_port:Optional[int] = 8090
    permit_database_name:Optional[str] = None 
    
    
    MYSQL_host:Optional[str] = None 
    MYSQL_username:Optional[str] = None 
    MYSQL_port:Optional[str] = None 
    MYSQL_password:Optional[str] = None 
    
@lru_cache
def get_settings() -> Settings:
    settings = Settings(env_file="config.env",env_file_encoding="utf-8",extra="ignore")
    settings.elasticsearch_username = os.environ.get("ELASTIC_username")
    settings.elasticsearch_password = os.environ.get("ELASTIC_password")
    settings.elasticsearch_url = os.environ.get("ELASTIC_URL")
    settings.ai_rag_host = os.environ.get("ai_rag_host")
    settings.ai_rag_host_gpu = os.environ.get("ai_rag_host_gpu")
    settings.jwtKey = os.environ.get("TAVASI_jwtKey")
    settings.enable_back_permition = os.environ.get("CONFIG_enable_back_permition")
    settings.is_mode_develop = os.environ.get("CONFIG_develop")
    
    settings.MYSQL_host = os.environ.get("MYSQL_host")
    settings.MYSQL_username = os.environ.get("MYSQL_username")
    settings.MYSQL_port = os.environ.get("MYSQL_port")
    settings.MYSQL_password = os.environ.get("MYSQL_password")

    return  settings