"""Diagnose your system and show basic information

This server mainly to get detail info for better bug reporting.

"""

import os
import platform
import re
import sys

import numpy
import torch
import tqdm

sys.path += [os.path.abspath('..'), os.path.abspath('.')]
import pytorch_lightning  # noqa: E402

LEVEL_OFFSET = '\t'
KEY_PADDING = 20


def run_and_parse_first_match(run_lambda, command, regex):
    """Runs command using run_lambda, returns the first regex match if it exists"""
    rc, out, _ = run_lambda(command)
    if rc != 0:
        return None
    match = re.search(regex, out)
    if match is None:
        return None
    return match.group(1)


def get_running_cuda_version(run_lambda):
    return run_and_parse_first_match(run_lambda, 'nvcc --version', r'V(.*)$')


def info_system():
    return {
        'OS': platform.system(),
        'architecture': platform.architecture(),
        'version': platform.version(),
        'processor': platform.processor(),
        'python': platform.python_version(),
    }


def info_cuda():
    return {
        'GPU': [torch.cuda.get_device_name(i) for i in range(torch.cuda.device_count())],
        # 'nvidia_driver': get_nvidia_driver_version(run_lambda),
        'available': torch.cuda.is_available(),
        'version': torch.version.cuda,
    }


def info_packages():
    return {
        'numpy': numpy.__version__,
        "pyTorch_version": torch.__version__,
        'pyTorch_debug': torch.version.debug,
        'pytorch-lightning': pytorch_lightning.__version__,
        'tqdm': tqdm.__version__,
    }


def nice_print(details, level=0):
    lines = []
    for k in sorted(details):
        key = f'* {k}:' if level == 0 else f'- {k}:'
        if isinstance(details[k], dict):
            lines += [level * LEVEL_OFFSET + key]
            lines += nice_print(details[k], level + 1)
        elif isinstance(details[k], (set, list, tuple)):
            lines += [level * LEVEL_OFFSET + key]
            lines += [(level + 1) * LEVEL_OFFSET + '- ' + v for v in details[k]]
        else:
            template = '{:%is} {}' % KEY_PADDING
            key_val = template.format(key, details[k])
            lines += [(level * LEVEL_OFFSET) + key_val]
    return lines


def main():
    details = {
        "System": info_system(),
        'CUDA': info_cuda(),
        'Packages': info_packages(),
    }
    lines = nice_print(details)
    text = os.linesep.join(lines)
    print(text)


if __name__ == '__main__':
    main()