from typing import Any
from typing import List
from typing import Tuple

import torch
import torch.nn as nn

from funasr.export.utils.torch_function import MakePadMask
from funasr.export.utils.torch_function import sequence_mask
#from funasr.models.encoder.sanm_encoder import SANMEncoder as Encoder
from funasr.punctuation.sanm_encoder import SANMEncoder
from funasr.export.models.encoder.sanm_encoder import SANMEncoder as SANMEncoder_export
from funasr.punctuation.abs_model import AbsPunctuation


class TargetDelayTransformer(nn.Module):

    def __init__(
            self,
            model,
            max_seq_len=512,
            model_name='punc_model',
            **kwargs,
    ):
        super().__init__()
        onnx = False
        if "onnx" in kwargs:
            onnx = kwargs["onnx"]
        self.embed = model.embed
        self.decoder = model.decoder
        # self.model = model
        self.feats_dim = self.embed.embedding_dim
        self.num_embeddings = self.embed.num_embeddings
        self.model_name = model_name
        from typing import Any
        from typing import List
        from typing import Tuple

        import torch
        import torch.nn as nn

        from funasr.export.utils.torch_function import MakePadMask
        from funasr.export.utils.torch_function import sequence_mask
        # from funasr.models.encoder.sanm_encoder import SANMEncoder as Encoder
        from funasr.punctuation.sanm_encoder import SANMEncoder
        from funasr.export.models.encoder.sanm_encoder import SANMEncoder as SANMEncoder_export
        from funasr.punctuation.abs_model import AbsPunctuation

        # class TargetDelayTransformer(nn.Module):
        #
        #     def __init__(
        #             self,
        #             model,
        #             max_seq_len=512,
        #             model_name='punc_model',
        #             **kwargs,
        #     ):
        #         super().__init__()
        #         onnx = False
        #         if "onnx" in kwargs:
        #             onnx = kwargs["onnx"]
        #         self.embed = model.embed
        #         self.decoder = model.decoder
        #         self.model = model
        #         self.feats_dim = self.embed.embedding_dim
        #         self.num_embeddings = self.embed.num_embeddings
        #         self.model_name = model_name
        #
        #         if isinstance(model.encoder, SANMEncoder):
        #             self.encoder = SANMEncoder_export(model.encoder, onnx=onnx)
        #         else:
        #             assert False, "Only support samn encode."
        #
        #     def forward(self, input: torch.Tensor, text_lengths: torch.Tensor) -> Tuple[torch.Tensor, None]:
        #         """Compute loss value from buffer sequences.
        #
        #         Args:
        #             input (torch.Tensor): Input ids. (batch, len)
        #             hidden (torch.Tensor): Target ids. (batch, len)
        #
        #         """
        #         x = self.embed(input)
        #         # mask = self._target_mask(input)
        #         h, _ = self.encoder(x, text_lengths)
        #         y = self.decoder(h)
        #         return y
        #
        #     def get_dummy_inputs(self):
        #         length = 120
        #         text_indexes = torch.randint(0, self.embed.num_embeddings, (2, length))
        #         text_lengths = torch.tensor([length - 20, length], dtype=torch.int32)
        #         return (text_indexes, text_lengths)
        #
        #     def get_input_names(self):
        #         return ['input', 'text_lengths']
        #
        #     def get_output_names(self):
        #         return ['logits']
        #
        #     def get_dynamic_axes(self):
        #         return {
        #             'input': {
        #                 0: 'batch_size',
        #                 1: 'feats_length'
        #             },
        #             'text_lengths': {
        #                 0: 'batch_size',
        #             },
        #             'logits': {
        #                 0: 'batch_size',
        #                 1: 'logits_length'
        #             },
        #         }

        if isinstance(model.encoder, SANMEncoder):
            self.encoder = SANMEncoder_export(model.encoder, onnx=onnx)
        else:
            assert False, "Only support samn encode."

    def forward(self, input: torch.Tensor, text_lengths: torch.Tensor) -> Tuple[torch.Tensor, None]:
        """Compute loss value from buffer sequences.

        Args:
            input (torch.Tensor): Input ids. (batch, len)
            hidden (torch.Tensor): Target ids. (batch, len)

        """
        x = self.embed(input)
        # mask = self._target_mask(input)
        h, _ = self.encoder(x, text_lengths)
        y = self.decoder(h)
        return y

    def get_dummy_inputs(self):
        length = 120
        text_indexes = torch.randint(0, self.embed.num_embeddings, (2, length))
        text_lengths = torch.tensor([length-20, length], dtype=torch.int32)
        return (text_indexes, text_lengths)

    def get_input_names(self):
        return ['input', 'text_lengths']

    def get_output_names(self):
        return ['logits']

    def get_dynamic_axes(self):
        return {
            'input': {
                0: 'batch_size',
                1: 'feats_length'
            },
            'text_lengths': {
                0: 'batch_size',
            },
            'logits': {
                0: 'batch_size',
                1: 'logits_length'
            },
        }