#!/usr/bin/env python3
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## GNU General Public License Usage
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## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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import glob
import os
import subprocess
import concurrent.futures
import sys
import typing

script_path = os.path.dirname(os.path.abspath(__file__))
base_path = os.path.dirname(script_path)
pro2cmake = os.path.join(script_path, 'pro2cmake.py')

if len(sys.argv) > 1:
    base_path = os.path.abspath(sys.argv[1])


def find_all_pro_files():

    def sorter(pro_file: str) -> str:
        """ Sorter that tries to prioritize main pro files in a directory. """
        pro_file_without_suffix = pro_file.rsplit('/', 1)[-1][:-4]
        dir_name = os.path.dirname(pro_file)
        if dir_name.endswith('/' + pro_file_without_suffix):
            return dir_name
        return dir_name + "/__" + pro_file

    all_files = []
    previous_dir_name: str = None
    for pro_file in sorted(glob.glob(os.path.join(base_path, '**/*.pro'),
                                     recursive=True),
                           key=sorter):
        dir_name = os.path.dirname(pro_file)
        if dir_name == previous_dir_name:
            print("Skipping:", pro_file)
        else:
            all_files.append(pro_file)
            previous_dir_name = dir_name
    return all_files


failed_files = []
all_files = find_all_pro_files()
files_count = len(all_files)

with concurrent.futures.ThreadPoolExecutor(initializer=os.nice, initargs=(10,)) as pool:

    def _process_a_file(data: typing.Tuple[str, int, int]) -> typing.Tuple[int, str, str]:
        filename, index, total = data
        result = subprocess.run((pro2cmake, os.path.basename(filename)),
                                cwd=os.path.dirname(filename),
                                stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        stdout = 'Converted[{}/{}]: {}\n'.format(index, total, filename)
        return result.returncode, filename, stdout + result.stdout.decode()

    for return_code, filename, stdout in pool.map(_process_a_file,
                                                  zip(all_files,
                                                      range(1, files_count + 1),
                                                      (files_count for _ in all_files))):
        if return_code:
            failed_files.append(filename)
        print(stdout)

if failed_files:
    print('The following files were not successfully '
          'converted ({} of {}):'.format(len(failed_files), files_count))
    for f in failed_files:
        print('    "{}"'.format(f))