from __future__ import annotations

from pathlib import Path

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    service_name: str = "BitCheck Image Verification API"
    max_upload_bytes: int = 12 * 1024 * 1024
    allowed_extensions: set[str] = {"jpg", "jpeg", "png", "webp"}
    model_path: Path = Path("models/bitcheck_efficientnet_b0_production.pth")
    model_fallback_paths: list[Path] = [
        Path("models/ai_vs_real_image_detector.pth"),
        Path("models/best_ai_vs_real_efficientnet_b0.pth"),
    ]
    model_arch: str = "efficientnet_b0"
    model_input_size: int = 224
    model_threshold: float = 0.5
    uploads_dir: Path = Path("uploads")
    outputs_dir: Path = Path("outputs")
    reports_dir: Path = Path("outputs/reports")
    watermark_templates_dir: Path = Path("templates/watermarks")
    log_level: str = "INFO"
    cors_origins: list[str] = ["*"]

    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8")


settings = Settings()
settings.uploads_dir.mkdir(parents=True, exist_ok=True)
settings.outputs_dir.mkdir(parents=True, exist_ok=True)
settings.reports_dir.mkdir(parents=True, exist_ok=True)
settings.watermark_templates_dir.mkdir(parents=True, exist_ok=True)