# Copyright (c) 2020  PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from six import text_type as _text_type
from x2paddle import program
import argparse
import sys
import logging


def arg_parser():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--model",
        "-m",
        type=_text_type,
        default=None,
        help="define model file path for tensorflow or onnx")
    parser.add_argument(
        "--prototxt",
        "-p",
        type=_text_type,
        default=None,
        help="prototxt file of caffe model")
    parser.add_argument(
        "--weight",
        "-w",
        type=_text_type,
        default=None,
        help="weight file of caffe model")
    parser.add_argument(
        "--save_dir",
        "-s",
        type=_text_type,
        default=None,
        help="path to save translated model")
    parser.add_argument(
        "--framework",
        "-f",
        type=_text_type,
        default=None,
        help="define which deeplearning framework(tensorflow/caffe/onnx/paddle2onnx)"
    )
    parser.add_argument(
        "--caffe_proto",
        "-c",
        type=_text_type,
        default=None,
        help="optional: the .py file compiled by caffe proto file of caffe model"
    )
    parser.add_argument(
        "--version",
        "-v",
        action="store_true",
        default=False,
        help="get version of x2paddle")
    parser.add_argument(
        "--define_input_shape",
        "-d",
        action="store_true",
        default=False,
        help="define input shape for tf model")
    parser.add_argument(
        "--convert_torch_project",
        "-tp",
        action='store_true',
        help="Convert the PyTorch Project.")
    parser.add_argument(
        "--project_dir",
        "-pd",
        type=_text_type,
        default=None,
        help="define project folder path for pytorch")
    parser.add_argument(
        "--pretrain_model",
        "-pm",
        type=_text_type,
        default=None,
        help="pretrain model file of pytorch model")
    parser.add_argument(
        "--enable_code_optim",
        "-co",
        default=True,
        help="Turn on code optimization")
    parser.add_argument(
        "--to_lite", "-tl", default=False, help="convert to Paddle-Lite format")
    parser.add_argument(
        "--lite_valid_places",
        "-vp",
        type=_text_type,
        default="arm",
        help="Specify the executable backend of the model")
    parser.add_argument(
        "--lite_model_type",
        "-mt",
        type=_text_type,
        default="naive_buffer",
        help="The type of lite model")

    return parser


def convert2lite(save_dir,
                 lite_valid_places="arm",
                 lite_model_type="naive_buffer"):
    """Convert to Paddle-Lite format."""

    from paddlelite.lite import Opt
    opt = Opt()
    opt.set_model_dir(save_dir + "/inference_model")
    opt.set_valid_places(lite_valid_places)
    opt.set_model_type(lite_model_type)
    opt.set_optimize_out(save_dir + "/opt")
    opt.run()


def tf2paddle(model_path,
              save_dir,
              define_input_shape=False,
              convert_to_lite=False,
              lite_valid_places="arm",
              lite_model_type="naive_buffer"):
    # check tensorflow installation and version
    try:
        import os
        os.environ["TF_CPP_MIN_LOG_LEVEL"] = '3'
        import tensorflow as tf
        version = tf.__version__
        if version >= '2.0.0' or version < '1.0.0':
            logging.info(
                "[ERROR] 1.0.0<=TensorFlow<2.0.0 is required, and v1.14.0 is recommended"
            )
            return
    except:
        logging.info(
            "[ERROR] TensorFlow is not installed, use \"pip install TensorFlow\"."
        )
        return

    from x2paddle.decoder.tf_decoder import TFDecoder
    from x2paddle.op_mapper.tf2paddle.tf_op_mapper import TFOpMapper

    logging.info("Now translating model from TensorFlow to Paddle.")
    model = TFDecoder(model_path, define_input_shape=define_input_shape)
    mapper = TFOpMapper(model)
    mapper.paddle_graph.build()
    logging.info("Model optimizing ...")
    from x2paddle.optimizer.optimizer import GraphOptimizer
    graph_opt = GraphOptimizer(source_frame="tf")
    graph_opt.optimize(mapper.paddle_graph)
    logging.info("Model optimized!")
    mapper.paddle_graph.gen_model(save_dir)
    logging.info("Successfully exported Paddle static graph model!")
    if convert_to_lite:
        logging.info("Now translating model from Paddle to Paddle lite ...")
        convert2lite(save_dir, lite_valid_places, lite_model_type)
        logging.info("Successfully exported Paddle Lite support model!")


def caffe2paddle(proto_file,
                 weight_file,
                 save_dir,
                 caffe_proto,
                 convert_to_lite=False,
                 lite_valid_places="arm",
                 lite_model_type="naive_buffer"):
    from x2paddle.decoder.caffe_decoder import CaffeDecoder
    from x2paddle.op_mapper.caffe2paddle.caffe_op_mapper import CaffeOpMapper
    import google.protobuf as gpb
    ver_part = gpb.__version__.split('.')
    version_satisfy = False
    if (int(ver_part[0]) == 3 and int(ver_part[1]) >= 6) \
            or (int(ver_part[0]) > 3):
        version_satisfy = True
    assert version_satisfy, '[ERROR] google.protobuf >= 3.6.0 is required'
    logging.info("Now translating model from caffe to paddle.")
    model = CaffeDecoder(proto_file, weight_file, caffe_proto)
    mapper = CaffeOpMapper(model)
    mapper.paddle_graph.build()
    logging.info("Model optimizing ...")
    from x2paddle.optimizer.optimizer import GraphOptimizer
    graph_opt = GraphOptimizer(source_frame="caffe")
    graph_opt.optimize(mapper.paddle_graph)
    logging.info("Model optimized!")
    mapper.paddle_graph.gen_model(save_dir)
    logging.info("Successfully exported Paddle static graph model!")
    if convert_to_lite:
        logging.info("Now translating model from Paddle to Paddle lite ...")
        convert2lite(save_dir, lite_valid_places, lite_model_type)
        logging.info("Successfully exported Paddle Lite support model!")


def onnx2paddle(model_path,
                save_dir,
                convert_to_lite=False,
                lite_valid_places="arm",
                lite_model_type="naive_buffer"):
    # check onnx installation and version
    try:
        import onnx
        version = onnx.version.version
        v0, v1, v2 = version.split('.')
        version_sum = int(v0) * 100 + int(v1) * 10 + int(v2)
        if version_sum < 160:
            logging.info("[ERROR] onnx>=1.6.0 is required")
            return
    except:
        logging.info(
            "[ERROR] onnx is not installed, use \"pip install onnx==1.6.0\".")
        return
    logging.info("Now translating model from onnx to paddle.")

    from x2paddle.decoder.onnx_decoder import ONNXDecoder
    from x2paddle.op_mapper.onnx2paddle.onnx_op_mapper import ONNXOpMapper
    model = ONNXDecoder(model_path)
    mapper = ONNXOpMapper(model)
    mapper.paddle_graph.build()
    mapper.paddle_graph.gen_model(save_dir)
    logging.info("Successfully exported Paddle static graph model!")
    if convert_to_lite:
        logging.info("Now translating model from Paddle to Paddle lite ...")
        convert2lite(save_dir, lite_valid_places, lite_model_type)
        logging.info("Successfully exported Paddle Lite support model!")


def pytorch2paddle(module,
                   save_dir,
                   jit_type="trace",
                   input_examples=None,
                   enable_code_optim=True,
                   convert_to_lite=False,
                   lite_valid_places="arm",
                   lite_model_type="naive_buffer"):
    # check pytorch installation and version
    try:
        import torch
        version = torch.__version__
        v0, v1, v2 = version.split('.')
        # Avoid the situation where the version is equal to 1.7.0+cu101
        if '+' in v2:
            v2 = v2.split('+')[0]
        version_sum = int(v0) * 100 + int(v1) * 10 + int(v2)
        if version_sum < 150:
            logging.info(
                "[ERROR] PyTorch>=1.5.0 is required, 1.6.0 is the most recommended"
            )
            return
        if version_sum > 160:
            logging.info("[WARNING] PyTorch==1.6.0 is recommended")
    except:
        logging.info(
            "[ERROR] PyTorch is not installed, use \"pip install torch==1.6.0 torchvision\"."
        )
        return
    logging.info("Now translating model from PyTorch to Paddle.")

    from x2paddle.decoder.pytorch_decoder import ScriptDecoder, TraceDecoder
    from x2paddle.op_mapper.pytorch2paddle.pytorch_op_mapper import PyTorchOpMapper

    if jit_type == "trace":
        model = TraceDecoder(module, input_examples)
    else:
        model = ScriptDecoder(module, input_examples)
    mapper = PyTorchOpMapper(model)
    mapper.paddle_graph.build()
    logging.info("Model optimizing ...")
    from x2paddle.optimizer.optimizer import GraphOptimizer
    graph_opt = GraphOptimizer(source_frame="pytorch", jit_type=jit_type)
    graph_opt.optimize(mapper.paddle_graph)
    logging.info("Model optimized!")
    mapper.paddle_graph.gen_model(
        save_dir, jit_type=jit_type, enable_code_optim=enable_code_optim)
    logging.info("Successfully exported Paddle static graph model!")
    if convert_to_lite:
        logging.info("Now translating model from Paddle to Paddle lite ...")
        convert2lite(save_dir, lite_valid_places, lite_model_type)
        logging.info("Successfully exported Paddle Lite support model!")


def main():
    logging.basicConfig(level=logging.INFO)
    if len(sys.argv) < 2:
        logging.info("Use \"x2paddle -h\" to print the help information")
        logging.info(
            "For more information, please follow our github repo below:)")
        logging.info("\nGithub: https://github.com/PaddlePaddle/X2Paddle.git\n")
        return

    parser = arg_parser()
    args = parser.parse_args()

    if args.version:
        import x2paddle
        logging.info("x2paddle-{} with python>=3.5, paddlepaddle>=1.6.0\n".
                     format(x2paddle.__version__))
        return

    if not args.convert_torch_project:
        assert args.framework is not None, "--framework is not defined(support tensorflow/caffe/onnx)"
    assert args.save_dir is not None, "--save_dir is not defined"

    try:
        import platform
        v0, v1, v2 = platform.python_version().split('.')
        if not (int(v0) >= 3 and int(v1) >= 5):
            logging.info("[ERROR] python>=3.5 is required")
            return
        import paddle
        v0, v1, v2 = paddle.__version__.split('.')
        logging.info("paddle.__version__ = {}".format(paddle.__version__))
        if v0 == '0' and v1 == '0' and v2 == '0':
            logging.info(
                "[WARNING] You are use develop version of paddlepaddle")
        elif int(v0) != 2 or int(v1) < 0:
            logging.info("[ERROR] paddlepaddle>=2.0.0 is required")
            return
    except:
        logging.info(
            "[ERROR] paddlepaddle not installed, use \"pip install paddlepaddle\""
        )

    if args.convert_torch_project:
        assert args.project_dir is not None, "--project_dir should be defined while translating pytorch project"
        from x2paddle.project_convertor.pytorch.convert import main as convert_torch
        convert_torch(args)
    else:
        if args.framework == "tensorflow":
            assert args.model is not None, "--model should be defined while translating tensorflow model"
            define_input_shape = False
            if args.define_input_shape:
                define_input_shape = True
            tf2paddle(
                args.model,
                args.save_dir,
                define_input_shape,
                convert_to_lite=args.to_lite,
                lite_valid_places=args.lite_valid_places,
                lite_model_type=args.lite_model_type)

        elif args.framework == "caffe":
            assert args.prototxt is not None and args.weight is not None, "--prototxt and --weight should be defined while translating caffe model"
            caffe2paddle(
                args.prototxt,
                args.weight,
                args.save_dir,
                args.caffe_proto,
                convert_to_lite=args.to_lite,
                lite_valid_places=args.lite_valid_places,
                lite_model_type=args.lite_model_type)
        elif args.framework == "onnx":
            assert args.model is not None, "--model should be defined while translating onnx model"
            onnx2paddle(
                args.model,
                args.save_dir,
                convert_to_lite=args.to_lite,
                lite_valid_places=args.lite_valid_places,
                lite_model_type=args.lite_model_type)
        elif args.framework == "paddle2onnx":
            logging.info(
                "Paddle to ONNX tool has been migrated to the new github: https://github.com/PaddlePaddle/paddle2onnx"
            )

        else:
            raise Exception(
                "--framework only support tensorflow/caffe/onnx now")


if __name__ == "__main__":
    main()