from typing import List, Union

from sglang.srt.managers.schedule_batch import MultimodalProcessorOutput
from sglang.srt.models.deepseek_janus_pro import MultiModalityCausalLM
from sglang.srt.multimodal.processors.base_processor import (
    BaseMultimodalProcessor,
    MultimodalSpecialTokens,
)


class JanusProImageProcessor(BaseMultimodalProcessor):
    models = [MultiModalityCausalLM]

    def __init__(self, hf_config, server_args, _processor, *args, **kwargs):
        super().__init__(hf_config, server_args, _processor, *args, **kwargs)

        self.mm_tokens = MultimodalSpecialTokens(
            image_token=_processor.image_token,
            image_token_id=_processor.image_id,
        ).build(_processor)

    async def process_mm_data_async(
        self,
        image_data: List[Union[str, bytes]],
        input_text,
        request_obj,
        **kwargs,
    ):
        base_out = await self.load_mm_data(
            prompt=input_text,
            image_data=image_data,
            multimodal_tokens=self.mm_tokens,
        )

        mm_items, input_ids, _ = self.process_and_combine_mm_data(
            base_out, self.mm_tokens, prompt=base_out.input_text
        )

        return MultimodalProcessorOutput(
            mm_items=mm_items,
            input_ids=input_ids.tolist(),
            im_start_id=self._processor.image_start_id,
            im_end_id=self._processor.image_end_id,
            im_token_id=self.mm_tokens.image_token_id,
        )
