import torch
from loguru import logger

from magic_pdf.config.constants import MODEL_NAME
from magic_pdf.model.model_list import AtomicModel
from magic_pdf.model.sub_modules.language_detection.yolov11.YOLOv11 import YOLOv11LangDetModel
from magic_pdf.model.sub_modules.layout.doclayout_yolo.DocLayoutYOLO import \
    DocLayoutYOLOModel
from magic_pdf.model.sub_modules.layout.layoutlmv3.model_init import \
    Layoutlmv3_Predictor
from magic_pdf.model.sub_modules.mfd.yolov8.YOLOv8 import YOLOv8MFDModel
from magic_pdf.model.sub_modules.mfr.unimernet.Unimernet import UnimernetModel
from magic_pdf.model.sub_modules.ocr.paddleocr.ppocr_273_mod import \
    ModifiedPaddleOCR
from magic_pdf.model.sub_modules.table.rapidtable.rapid_table import \
    RapidTableModel
# from magic_pdf.model.sub_modules.ocr.paddleocr.ppocr_291_mod import ModifiedPaddleOCR
from magic_pdf.model.sub_modules.table.structeqtable.struct_eqtable import \
    StructTableModel
from magic_pdf.model.sub_modules.table.tablemaster.tablemaster_paddle import \
    TableMasterPaddleModel


def table_model_init(table_model_type, model_path, max_time, _device_='cpu', ocr_engine=None, table_sub_model_name=None):
    if table_model_type == MODEL_NAME.STRUCT_EQTABLE:
        table_model = StructTableModel(model_path, max_new_tokens=2048, max_time=max_time)
    elif table_model_type == MODEL_NAME.TABLE_MASTER:
        config = {
            'model_dir': model_path,
            'device': _device_
        }
        table_model = TableMasterPaddleModel(config)
    elif table_model_type == MODEL_NAME.RAPID_TABLE:
        table_model = RapidTableModel(ocr_engine, table_sub_model_name)
    else:
        logger.error('table model type not allow')
        exit(1)

    return table_model


def mfd_model_init(weight, device='cpu'):
    if str(device).startswith("npu"):
        device = torch.device(device)
    mfd_model = YOLOv8MFDModel(weight, device)
    return mfd_model


def mfr_model_init(weight_dir, cfg_path, device='cpu'):
    mfr_model = UnimernetModel(weight_dir, cfg_path, device)
    return mfr_model


def layout_model_init(weight, config_file, device):
    model = Layoutlmv3_Predictor(weight, config_file, device)
    return model


def doclayout_yolo_model_init(weight, device='cpu'):
    if str(device).startswith("npu"):
        device = torch.device(device)
    model = DocLayoutYOLOModel(weight, device)
    return model


def langdetect_model_init(langdetect_model_weight, device='cpu'):
    if str(device).startswith("npu"):
        device = torch.device(device)
    model = YOLOv11LangDetModel(langdetect_model_weight, device)
    return model


def ocr_model_init(show_log: bool = False,
                   det_db_box_thresh=0.3,
                   lang=None,
                   use_dilation=True,
                   det_db_unclip_ratio=1.8,
                   ):

    if lang is not None and lang != '':
        model = ModifiedPaddleOCR(
            show_log=show_log,
            det_db_box_thresh=det_db_box_thresh,
            lang=lang,
            use_dilation=use_dilation,
            det_db_unclip_ratio=det_db_unclip_ratio,
        )
    else:
        model = ModifiedPaddleOCR(
            show_log=show_log,
            det_db_box_thresh=det_db_box_thresh,
            use_dilation=use_dilation,
            det_db_unclip_ratio=det_db_unclip_ratio,
        )
    return model


class AtomModelSingleton:
    _instance = None
    _models = {}

    def __new__(cls, *args, **kwargs):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
        return cls._instance

    def get_atom_model(self, atom_model_name: str, **kwargs):

        lang = kwargs.get('lang', None)
        layout_model_name = kwargs.get('layout_model_name', None)
        table_model_name = kwargs.get('table_model_name', None)

        if atom_model_name in [AtomicModel.OCR]:
            key = (atom_model_name, lang)
        elif atom_model_name in [AtomicModel.Layout]:
            key = (atom_model_name, layout_model_name)
        elif atom_model_name in [AtomicModel.Table]:
            key = (atom_model_name, table_model_name)
        else:
            key = atom_model_name

        if key not in self._models:
            self._models[key] = atom_model_init(model_name=atom_model_name, **kwargs)
        return self._models[key]

def atom_model_init(model_name: str, **kwargs):
    atom_model = None
    if model_name == AtomicModel.Layout:
        if kwargs.get('layout_model_name') == MODEL_NAME.LAYOUTLMv3:
            atom_model = layout_model_init(
                kwargs.get('layout_weights'),
                kwargs.get('layout_config_file'),
                kwargs.get('device')
            )
        elif kwargs.get('layout_model_name') == MODEL_NAME.DocLayout_YOLO:
            atom_model = doclayout_yolo_model_init(
                kwargs.get('doclayout_yolo_weights'),
                kwargs.get('device')
            )
        else:
            logger.error('layout model name not allow')
            exit(1)
    elif model_name == AtomicModel.MFD:
        atom_model = mfd_model_init(
            kwargs.get('mfd_weights'),
            kwargs.get('device')
        )
    elif model_name == AtomicModel.MFR:
        atom_model = mfr_model_init(
            kwargs.get('mfr_weight_dir'),
            kwargs.get('mfr_cfg_path'),
            kwargs.get('device')
        )
    elif model_name == AtomicModel.OCR:
        atom_model = ocr_model_init(
            kwargs.get('ocr_show_log'),
            kwargs.get('det_db_box_thresh'),
            kwargs.get('lang'),
        )
    elif model_name == AtomicModel.Table:
        atom_model = table_model_init(
            kwargs.get('table_model_name'),
            kwargs.get('table_model_path'),
            kwargs.get('table_max_time'),
            kwargs.get('device'),
            kwargs.get('ocr_engine'),
            kwargs.get('table_sub_model_name')
        )
    elif model_name == AtomicModel.LangDetect:
        if kwargs.get('langdetect_model_name') == MODEL_NAME.YOLO_V11_LangDetect:
            atom_model = langdetect_model_init(
                kwargs.get('langdetect_model_weight'),
                kwargs.get('device')
            )
        else:
            logger.error('langdetect model name not allow')
            exit(1)
    else:
        logger.error('model name not allow')
        exit(1)

    if atom_model is None:
        logger.error('model init failed')
        exit(1)
    else:
        return atom_model
