from pathlib import Path

from pydantic import Field, field_validator
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env", env_file_encoding="utf-8", extra="ignore"
    )

    api_key: str = Field(..., min_length=8)
    openrouter_api_key: str = Field(..., min_length=8)
    openrouter_base_url: str = "https://openrouter.ai/api/v1"
    llm_model_default: str = "anthropic/claude-sonnet-4"
    public_base_url: str = Field(...)
    data_dir: Path = Path("/data")
    templates_seed_dir: Path = Path("/app/services/mcp-docugen/templates_seed")
    inline_stylesheet_path: Path | None = Path("/app/themes/tielogic.css")
    docx_reference_path: Path | None = Path("/app/themes/tielogic-reference.docx")
    asset_ttl_days: int = 30
    max_image_size_mb: int = 10
    llm_timeout_seconds: int = 60

    @field_validator("public_base_url")
    @classmethod
    def strip_trailing_slash(cls, v: str) -> str:
        return v.rstrip("/")