# Google utils: https://cloud.google.com/storage/docs/reference/libraries

import os
import platform
import subprocess
import time
from pathlib import Path

import requests
import torch


def gsutil_getsize(url=''):
    s = subprocess.check_output(f'gsutil du {url}', shell=True).decode('utf-8')
    return eval(s.split(' ')[0]) if len(s) else 0


def attempt_download(file, repo='WongKinYiu/yolov7'):
    file = Path(str(file).strip().replace("'", '').lower())

    if not file.exists():
        try:
            response = requests.get(f'https://api.github.com/repos/{repo}/releases/latest').json()
            assets = [x['name'] for x in response['assets']]
            tag = response['tag_name']
        except:
            assets = ['yolov7.pt', 'yolov7-tiny.pt', 'yolov7x.pt', 'yolov7-d6.pt', 'yolov7-e6.pt', 
                      'yolov7-e6e.pt', 'yolov7-w6.pt']
            try:
                tag = subprocess.check_output('git tag', shell=True).decode().split()[-1]
            except:
                tag = 'v0.1'
        name = file.name
        if name in assets:
            msg = f'{file} missing, try downloading from https://github.com/{repo}/releases/'
            redundant = False
            try:
                url = f'https://github.com/{repo}/releases/download/{tag}/{name}'
                print(f'Downloading {url} to {file}...')
                torch.hub.download_url_to_file(url, file)
                assert file.exists() and file.stat().st_size > 1E6
            except Exception as e:  # GCP
                print(f'Download error: {e}')
                assert redundant, 'No secondary mirror'
                url = f'https://storage.googleapis.com/{repo}/ckpt/{name}'
                print(f'Downloading {url} to {file}...')
                os.system(f'curl -L {url} -o {file}')
            finally:
                if not file.exists() or file.stat().st_size < 1E6:
                    file.unlink(missing_ok=True)
                    print(f'ERROR: Download failure: {msg}')
                print('')
                return


def gdrive_download(id='', file='tmp.zip'):
    t = time.time()
    file = Path(file)
    cookie = Path('cookie') 
    print(f'Downloading https://drive.google.com/uc?export=download&id={id} as {file}... ', end='')
    file.unlink(missing_ok=True)
    cookie.unlink(missing_ok=True)
    out = "NUL" if platform.system() == "Windows" else "/dev/null"
    os.system(f'curl -c ./cookie -s -L "drive.google.com/uc?export=download&id={id}" > {out}')
    if os.path.exists('cookie'):
        s = f'curl -Lb ./cookie "drive.google.com/uc?export=download&confirm={get_token()}&id={id}" -o {file}'
    else:
        s = f'curl -s -L -o {file} "drive.google.com/uc?export=download&id={id}"'
    r = os.system(s)
    cookie.unlink(missing_ok=True)
    if r != 0:
        file.unlink(missing_ok=True)
        print('Download error ') 
        return r
    
    if file.suffix == '.zip':
        print('unzipping... ', end='')
        os.system(f'unzip -q {file}')
        file.unlink()

    print(f'Done ({time.time() - t:.1f}s)')
    return r


def get_token(cookie="./cookie"):
    with open(cookie) as f:
        for line in f:
            if "download" in line:
                return line.split()[-1]
    return ""