"""Fallback browser runtime configuration for generated HTML artifacts.

The settings dialog stores the addresses that new pages actually use. These
fields remain so an older ``config.yaml`` still loads; they apply only when
the dialog has not saved a value yet.
"""

from pydantic import BaseModel, Field

DEFAULT_HTML_RUNTIME_BASE_URL = "http://localhost:8001/api/public/html-runtime"
DEFAULT_HTML_MAP_TILE_URL = "https://mt0.google.com/vt/lyrs=m&hl=zh-CN&x={x}&y={y}&z={z}"


class HtmlRuntimeConfig(BaseModel):
    """Legacy fallback used before the settings dialog saves an address."""

    base_url: str = Field(
        default=DEFAULT_HTML_RUNTIME_BASE_URL,
        min_length=1,
        description="Fallback browser-accessible Gateway base URL for generated HTML runtime files",
    )
    map_tile_url: str = Field(
        default=DEFAULT_HTML_MAP_TILE_URL,
        min_length=1,
        description="Fallback Leaflet tile URL template used when HTML maps use the map-webpage engine",
    )