from __future__ import annotations

from pydantic import BaseModel, ConfigDict, Field

from app.generation.domain.enums import GenerationModality


class GenerationModelCapability(BaseModel):
    """An explicitly implemented model contract.

    ``input_schema`` is descriptive only; request validation remains owned by
    the adapter's typed Pydantic input model.  It lets future transports build
    capability-driven UIs without accepting arbitrary provider payloads.
    """

    model_config = ConfigDict(extra="forbid")

    id: str = Field(min_length=1, max_length=255)
    name: str = Field(min_length=1, max_length=255)
    modality: GenerationModality
    input_asset_supported: bool = False
    input_schema: dict[str, object] = Field(default_factory=dict)


class GenerationProviderCapabilities(BaseModel):
    """Public, non-secret provider discovery metadata."""

    model_config = ConfigDict(extra="forbid")

    provider: str = Field(pattern=r"^[a-z][a-z0-9_-]{0,63}$")
    name: str = Field(min_length=1, max_length=255)
    models: list[GenerationModelCapability] = Field(default_factory=list)
    implementation_status: str = Field(default="foundation", max_length=64)
    supports_cancellation: bool = False
    supports_status_reconciliation: bool = False