import os
import mimetypes

class FileIdentifier:
    def __init__(self):
        mimetypes.init()
        # Mapping from simple type to action and common extensions
        self.file_type_map = {
            "audio": {"action": "speech-to-text", "extensions": [".mp3", ".wav", ".flac", ".aac", ".ogg"]},
            "spreadsheet": {"action": "spreadsheet_parser", "extensions": [".xlsx", ".xls", ".ods"]},
            "image": {"action": "ocr_vision_reasoning", "extensions": [".png", ".jpg", ".jpeg", ".gif", ".bmp"]},
            "python_code": {"action": "safe_code_interpreter", "extensions": [".py"]},
            "pdf": {"action": "pdf_text_extractor", "extensions": [".pdf"]},
            "text": {"action": "text_file_reader", "extensions": [".txt", ".md", ".rtf"]},
            "csv": {"action": "csv_parser", "extensions": [".csv"]},
            # Add more specific types if needed
        }
        # For quick lookup from extension to simple type
        self.extension_to_type = {}
        for simple_type, details in self.file_type_map.items():
            for ext in details["extensions"]:
                self.extension_to_type[ext] = simple_type

    def identify_file(self, filepath):
        """
        Identifies the file type and suggests a processing action.
        Returns a dictionary with 'filepath', 'determined_type', 'mime_type', 
        'suggested_action', or an 'error'.
        """
        if not os.path.exists(filepath):
            return {
                "filepath": filepath,
                "error": "File not found"
            }

        mime_type, encoding = mimetypes.guess_type(filepath)
        file_extension = os.path.splitext(filepath)[1].lower()

        determined_type = "unknown"
        suggested_action = "unknown_handler"

        # Prioritize extension-based mapping for specific known types
        if file_extension in self.extension_to_type:
            determined_type = self.extension_to_type[file_extension]
            suggested_action = self.file_type_map[determined_type]["action"]
        elif mime_type:
            # Fallback to MIME type if extension is not specifically mapped
            # This part might need more sophisticated mapping from MIME to your simple types
            if mime_type.startswith("audio/"):
                determined_type = "audio"
                suggested_action = self.file_type_map["audio"]["action"]
            elif mime_type.startswith("image/"):
                determined_type = "image"
                suggested_action = self.file_type_map["image"]["action"]
            elif mime_type == "application/pdf":
                determined_type = "pdf"
                suggested_action = self.file_type_map["pdf"]["action"]
            elif mime_type == "text/csv":
                determined_type = "csv"
                suggested_action = self.file_type_map["csv"]["action"]
            elif mime_type.startswith("text/"): # General text
                # Check if it's python by extension, as text/x-python might not always be guessed
                if file_extension == ".py":
                    determined_type = "python_code"
                    suggested_action = self.file_type_map["python_code"]["action"]
                else:
                    determined_type = "text"
                    suggested_action = self.file_type_map["text"]["action"]
            elif file_extension == ".xlsx" or mime_type == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet":
                determined_type = "spreadsheet"
                suggested_action = self.file_type_map["spreadsheet"]["action"]
            # Add more MIME-based rules if necessary
        
        # If still unknown, but has a common extension not yet caught
        if determined_type == "unknown" and file_extension:
             # A final check for common types if MIME was unhelpful or generic
            if file_extension in self.extension_to_type: # Redundant if first check comprehensive
                determined_type = self.extension_to_type[file_extension]
                suggested_action = self.file_type_map[determined_type]["action"]


        return {
            "filepath": filepath,
            "determined_type": determined_type,
            "file_extension": file_extension,
            "mime_type": mime_type,
            "suggested_action": suggested_action
        }

# Example Usage (optional, can be kept for testing this module directly):
if __name__ == "__main__":
    identifier = FileIdentifier()
    dummy_files_dir = "dummy_files_for_test"
    os.makedirs(dummy_files_dir, exist_ok=True)

    test_files_info = {
        "audio_sample.mp3": "audio content",
        "report_data.xlsx": "excel content",
        "diagram.png": "image content",
        "analysis_script.py": "print('hello')",
        "document.pdf": "pdf content",
        "notes.txt": "text content",
        "data.csv": "col1,col2\n1,2",
        "archive.zip": "zip content", # Example of an unmapped type by default
        "unknown_file.dat": "binary data"
    }

    for filename, content in test_files_info.items():
        with open(os.path.join(dummy_files_dir, filename), "w") as f:
            f.write(content) # Simple write for testing existence and extension

    test_filepaths = [os.path.join(dummy_files_dir, f) for f in test_files_info.keys()]
    test_filepaths.append("non_existent_file.doc")

    for filepath_to_test in test_filepaths:
        result = identifier.identify_file(filepath_to_test)
        print(result)

    # Consider cleaning up dummy files if you run this main block frequently
    # import shutil
    # shutil.rmtree(dummy_files_dir)
    print(f"\nNote: Dummy files created in '{dummy_files_dir}'. You may want to remove this directory after testing.")