"""
Konfiguration för LandveX Admin Backend (User Management + Tenant Management).
"""
from pydantic_settings import BaseSettings, SettingsConfigDict
from functools import lru_cache


class Settings(BaseSettings):
    APP_NAME: str = "LandveX Admin Backend"
    DEBUG: bool = False

    # Database
    DATABASE_URL: str = "postgresql+asyncpg://postgres:postgres@localhost:5432/landvex"
    DATABASE_POOL_SIZE: int = 20
    DATABASE_MAX_OVERFLOW: int = 10

    # Schema isolation
    DEFAULT_TENANT_SCHEMA: str = "public"
    TENANT_SCHEMA_PREFIX: str = "tenant_"

    # JWT
    SECRET_KEY: str = "change-me-in-production-landvex-secret-key-2024"
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    REFRESH_TOKEN_EXPIRE_DAYS: int = 7

    # Invitation
    INVITATION_TOKEN_EXPIRE_HOURS: int = 48
    FRONTEND_SET_PASSWORD_URL: str = "https://admin.landvex.se/set-password"

    # Password policy
    MIN_PASSWORD_LENGTH: int = 8

    # Audit logging
    AUDIT_LOG_TABLE: str = "audit_logs"
    AUDIT_RETENTION_DAYS: int = 365

    # Pagination
    DEFAULT_PAGE_SIZE: int = 20
    MAX_PAGE_SIZE: int = 100

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


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