from pathlib import PurePosixPath
from typing import Sequence
from ..domain.models import Document, IngestionRequest

class GitHubConnector:
    """Small GitHub SCM adapter; transport is injected for testability."""
    def __init__(self, token: str = "", transport=None):
        self.token, self.transport = token, transport

    def fetch(self, request: IngestionRequest) -> Sequence[Document]:
        if self.transport is None:
            return []
        payload = self.transport(request.source.repository, request.source.path, request.source.revision, self.token)
        if isinstance(payload, str):
            payload = {"content": payload}
        return [Document(request.source, payload.get("content", ""), {"provider": "github", "path": str(PurePosixPath(request.source.path))})]