import time
from typing import List, Union

from sglang.srt.managers.schedule_batch import (
    Modality,
    MultimodalDataItem,
    MultimodalProcessorOutput,
)
from sglang.srt.models.interns1pro import InternS1ProForConditionalGeneration
from sglang.srt.multimodal.processors.qwen_vl import (
    QwenVLImageProcessor,
    preprocess_video,
)
from sglang.utils import logger


class InternS1_1ImageProcessor(QwenVLImageProcessor):
    models = [
        InternS1ProForConditionalGeneration,
    ]

    def get_mm_data(self, prompt, embeddings, img_grid_thw):
        input_ids, offsets = self.build_input_ids(prompt, img_grid_thw)

        mm_items = [
            MultimodalDataItem(
                modality=Modality.IMAGE,
                offsets=offsets,
                precomputed_embeddings=embeddings,
            )
        ]

        return MultimodalProcessorOutput(
            input_ids=input_ids,
            mm_items=mm_items,
            im_start_id=self.IM_START_TOKEN_ID,
            im_end_id=self.IM_END_TOKEN_ID,
            im_token_id=self.mm_tokens.image_token_id,
            video_token_id=self.mm_tokens.video_token_id,
            audio_token_id=self.mm_tokens.audio_token_id,
        )

    async def process_mm_data_async(
        self,
        image_data: List[Union[str, bytes]],
        input_text,
        request_obj,
        *args,
        **kwargs,
    ):
        entry_time = time.perf_counter()
        base_output = await self.load_mm_data(
            prompt=input_text,
            image_data=image_data,
            video_data=request_obj.video_data,
            audio_data=request_obj.audio_data,
            multimodal_tokens=self.mm_tokens,
        )
        load_time = time.perf_counter()
        rid = getattr(request_obj, "rid", "anonymous_rid")

        video_metadata = None
        if base_output.videos:
            videos_processed = [
                await preprocess_video(video, video_config=self.video_config)
                for video in base_output.videos
            ]
            base_output.videos, video_metadata = map(list, zip(*videos_processed))

        preprocess_time = time.perf_counter()

        mm_items, input_ids, ret = self.process_and_combine_mm_data(
            base_output,
            self.mm_tokens,
            video_metadata=video_metadata,
            do_sample_frames=False,
        )

        second_per_grid_ts = getattr(ret, "second_per_grid_ts", None)
        if second_per_grid_ts is None:
            second_per_grid_ts = getattr(ret, "video_second_per_grid", None)

        process_time = time.perf_counter()

        input_ids = input_ids.flatten()

        image_grid_thw = None
        if hasattr(ret, "image_grid_thw"):
            image_grid_thw = ret.image_grid_thw

        if image_grid_thw is None and image_data and isinstance(image_data[0], dict):
            image_grid_thw = image_data[0].get("image_grid_thw")

        video_grid_thw = None
        if hasattr(ret, "video_grid_thw"):
            video_grid_thw = ret.video_grid_thw

        if video_grid_thw is None and request_obj.video_data:
            first_video = request_obj.video_data[0]
            if isinstance(first_video, dict):
                video_grid_thw = first_video.get("video_grid_thw")

        get_rope_index_time = time.perf_counter()

        logger.debug(
            f"[QwenVLProcessor Perf] {rid=}, "
            f"load_time: {(load_time - entry_time) * 1000:.2f} ms, "
            f"preprocess_time: {(preprocess_time - load_time) * 1000:.2f} ms, "
            f"process_time: {(process_time - preprocess_time) * 1000:.2f} ms, "
            f"get_rope_index_time: {(get_rope_index_time - process_time) * 1000:.2f} ms, "
            f"total_time: {(get_rope_index_time - entry_time) * 1000:.2f} ms"
        )

        return MultimodalProcessorOutput(
            input_ids=input_ids.tolist(),
            mm_items=mm_items,
            im_start_id=self.vision_start_token_id,
            im_end_id=self.vision_end_token_id,
            im_token_id=self.mm_tokens.image_token_id,
            video_token_id=self.mm_tokens.video_token_id,
            audio_token_id=self.mm_tokens.audio_token_id,
        )