from __future__ import annotations

from claridoc.models import ProviderSpec, ValidationError
from claridoc.providers.antigravity import AntigravityProvider
from claridoc.providers.base import Provider
from claridoc.providers.claude import ClaudeProvider
from claridoc.providers.codex import CodexProvider
from claridoc.providers.mock import MockProvider


def create_provider(spec: ProviderSpec) -> Provider:
    name = spec.provider.casefold().strip()
    if name == "mock":
        return MockProvider(spec)
    if name == "codex":
        return CodexProvider(spec)
    if name == "claude":
        return ClaudeProvider(spec)
    if name == "antigravity":
        return AntigravityProvider(spec)
    raise ValidationError(f"unsupported provider: {spec.provider}; expected mock, codex, claude, or antigravity")