#!/usr/bin/python3
# -*- coding: utf-8 -*-
import argparse
import logging
import json
from pathlib import Path
import platform
import re

from project_settings import project_path, log_directory
import log

log.setup(log_directory=log_directory)

import gradio as gr

from toolbox.os.command import Command

main_logger = logging.getLogger("main")


def get_args():
    parser = argparse.ArgumentParser()

    parser.add_argument(
        "--example_wav_dir",
        default=(project_path / "data/examples").as_posix(),
        type=str
    )
    args = parser.parse_args()
    return args

def process_uploaded_file(vad_engine: str, filename: str, silence_time: float = 0.3, longest_activate: float = 3.0) -> str:
    if vad_engine == "nx_vad":
        return run_nx_vad(filename, silence_time, longest_activate)
    elif vad_engine == "silero-vad":
        return "silero-vad"
    else:
        return f"vad engine invalid: {vad_engine}"

def run_nx_vad(filename: str, silence_time: float = 0.3, longest_activate: float = 3.0) -> str:
    filename = Path(filename).as_posix()

    main_logger.info("do vad: {}".format(filename))

    cmd = "vad_bins/nx_vad --filename {} --silence_time {} --longest_activate {}".format(
        filename, silence_time, longest_activate
    )
    vad_result = Command.popen(cmd)

    pattern = "(\\d+)[\r\n]VadFlagPrepare[\r\n](\\d+)[\r\n]VadFlagSpeaking(?:[\r\n](?:\\d+)[\r\n]VadFlagPause[\r\n](?:\\d+)[\r\n]VadFlagSpeaking)?[\r\n](\\d+)[\r\n]VadFlagNoSpeech"

    vad_timestamps = re.findall(pattern, vad_result, flags=re.DOTALL)

    vad_timestamps: str = json.dumps(vad_timestamps, ensure_ascii=False, indent=2)

    return vad_timestamps


def shell(cmd: str):
    return Command.popen(cmd)


def main():
    args = get_args()

    title = "## GO语言实现的VAD."

    # examples
    example_wav_dir = Path(args.example_wav_dir)

    examples = list()
    for filename in example_wav_dir.glob("*.wav"):
        examples.append(
            [
                "nx_vad",
                filename.as_posix(),
                0.3, 3.0,
            ]
        )

    # blocks
    with gr.Blocks() as blocks:
        gr.Markdown(value=title)

        with gr.Tabs():
            with gr.TabItem("Upload from disk"):
                uploaded_file = gr.Audio(
                    sources=["upload"],
                    type="filepath",
                    label="Upload from disk",
                )
                uploaded_vad_engine = gr.Dropdown(choices=["nx_vad", "silero-vad"], value="nx_vad", label="vad_engine")
                uploaded_silence_time = gr.Slider(minimum=0.0, maximum=1.0, value=0.3, step=0.01, label="silence time")
                uploaded_longest_activate = gr.Slider(minimum=0.0, maximum=20.0, value=3.0, step=0.1, label="longest activate")
                upload_button = gr.Button("Run VAD")
                uploaded_output = gr.Textbox(label="outputs")

            gr.Examples(
                examples=examples,
                inputs=[
                    uploaded_vad_engine,
                    uploaded_file,
                    uploaded_silence_time,
                    uploaded_longest_activate,
                ],
                outputs=[
                    uploaded_output
                ],
                fn=process_uploaded_file
            )

            upload_button.click(
                process_uploaded_file,
                inputs=[
                    uploaded_vad_engine,
                    uploaded_file,
                    uploaded_silence_time,
                    uploaded_longest_activate,
                ],
                outputs=[
                    uploaded_output
                ],
            )
            with gr.TabItem("shell"):
                shell_text = gr.Textbox(label="cmd")
                shell_button = gr.Button("run")
                shell_output = gr.Textbox(label="output")

            shell_button.click(
                shell,
                inputs=[
                    shell_text,
                ],
                outputs=[
                    shell_output
                ],
            )

    blocks.queue().launch(
        share=False if platform.system() == "Windows" else False,
        server_name="127.0.0.1" if platform.system() == "Windows" else "0.0.0.0",
        server_port=7860
    )

    return


if __name__ == "__main__":
    main()