"""Enricher: Extract text from a document file."""

import sys
import json
import os

sys.path.insert(0, os.path.join(os.environ.get("FN_REGISTRY_ROOT", ""), "python", "functions", "core"))

from extract_text_from_file import extract_text_from_file


def main():
    entity = json.load(sys.stdin)
    file_path = (entity.get("metadata") or {}).get("file_path", "")

    if not file_path:
        json.dump({"error": "No file_path in entity metadata"}, sys.stdout)
        return

    if not os.path.exists(file_path):
        json.dump({"error": f"File not found: {file_path}"}, sys.stdout)
        return

    text = extract_text_from_file(file_path)

    result = {
        "entities": [
            {
                "name": f"Text: {os.path.basename(file_path)}",
                "type_ref": "text",
                "description": f"Text extracted from {os.path.basename(file_path)}",
                "tags": ["extracted"],
                "metadata": {
                    "content_preview": text[:500],
                    "source": file_path,
                    "char_count": len(text),
                    "full_content": text,
                },
                "notes": "",
            }
        ],
        "relations": [
            {
                "name": "extracted_from",
                "from_entity": "__NEW_0__",
                "to_entity": "__SOURCE__",
                "description": f"Text extracted from document",
                "weight": 1.0,
                "tags": [],
                "notes": "",
            }
        ],
    }
    json.dump(result, sys.stdout, ensure_ascii=False)


if __name__ == "__main__":
    main()