import json

from crewai_tools.rag.base_loader import BaseLoader, LoaderResult
from crewai_tools.rag.loaders.utils import load_from_url
from crewai_tools.rag.source_content import SourceContent


class JSONLoader(BaseLoader):
    def load(self, source_content: SourceContent, **kwargs) -> LoaderResult:  # type: ignore[override]
        source_ref = source_content.source_ref
        content = source_content.source

        if source_content.is_url():
            content = load_from_url(
                source_ref,
                kwargs,
                accept_header="application/json",
                loader_name="JSONLoader",
            )
        elif source_content.path_exists():
            content = self._load_from_file(source_ref)

        return self._parse_json(content, source_ref)

    @staticmethod
    def _load_from_file(path: str) -> str:
        with open(path, encoding="utf-8") as file:
            return file.read()

    def _parse_json(self, content: str, source_ref: str) -> LoaderResult:
        try:
            data = json.loads(content)
            if isinstance(data, dict):
                text = "\n".join(
                    f"{k}: {json.dumps(v, indent=0)}" for k, v in data.items()
                )
            elif isinstance(data, list):
                text = "\n".join(json.dumps(item, indent=0) for item in data)
            else:
                text = json.dumps(data, indent=0)

            metadata = {
                "format": "json",
                "type": type(data).__name__,
                "size": len(data) if isinstance(data, (list, dict)) else 1,
            }
        except json.JSONDecodeError as e:
            text = content
            metadata = {"format": "json", "parse_error": str(e)}

        return LoaderResult(
            content=text,
            source=source_ref,
            metadata=metadata,
            doc_id=self.generate_doc_id(source_ref=source_ref, content=text),
        )