"""
Settings configuration that works in both local development and Docker environments.

In local development:
- Loads from .env file if it exists
- Environment variables override .env file values

In Docker:
- Reads directly from environment variables (no .env file needed)
- Use docker-compose.yml or docker run -e to set environment variables
"""

import os
from os import environ

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        # Try to load .env file for local development, but don't fail if it doesn't exist
        env_file=".env" if os.path.exists(".env") else None,
        env_file_encoding="utf-8",
        extra="ignore",
        # Environment variables take precedence over .env file
        env_ignore_empty=True,
    )
    airtable_pat: str
    airtable_base: str
    slack_signing_secret: str
    slack_client_id: str
    slack_bolt_is_broken_so_this_cant_be_called_client_secret: str
    slack_bot_token: str
    app_base_url: str
    game_id_salt: str

    airtable_submissions_table: str
    airtable_users_table: str
    airtable_items_table: str
    airtable_sessions_table: str
    airtable_item_instances_table: str

    # Security settings
    environment: str = "development"  # development, staging, production
    max_request_size: int = 1048576  # 1MB default
    rate_limit_requests: int = 20  # requests per minute per IP
    allowed_origins: str = "*"  # Comma-separated list or "*" for development
    trust_proxy_headers: bool = False  # Whether to trust X-Forwarded-For headers

    # Session security
    session_ttl_hours: int = 24  # Session expires after 24 hours

    # Logging settings
    log_level: str = "INFO"  # DEBUG, INFO, WARNING, ERROR, CRITICAL
    log_format: str = "standard"  # standard, json, verbose
    log_file: str = ""  # Empty string means no file logging, only console
    log_max_size: int = 10485760  # 10MB default for log rotation
    log_backup_count: int = 5  # Number of backup log files to keep
    verbose_logging: bool = False  # Enable verbose debug logging

    # Redis/Valkey settings - prioritize explicit env vars, fall back to container detection
    redis_host: str = environ.get("REDIS_HOST") or (
        "valkey" if environ.get("DOCKER_CONTAINER") else "localhost"
    )
    redis_port: int = int(environ.get("REDIS_PORT", "6379"))

    @property
    def is_production(self) -> bool:
        return self.environment == "production"

    @property
    def is_container(self) -> bool:
        """Detect if running in a container environment."""
        return bool(environ.get("DOCKER_CONTAINER") or environ.get("REDIS_HOST"))

    @property
    def origins_list(self) -> list[str]:
        if self.allowed_origins == "*":
            return ["*"]
        return [origin.strip() for origin in self.allowed_origins.split(",")]


settings = Settings()  # type: ignore