import glob
import json
import os
import subprocess
import sys

import github
import uritemplate
import boto3


def main():
    #upload_to_github_if_tagged('lbryio/lbry')
    upload_to_s3('daemon')


def get_asset_filename():
    root_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
    return glob.glob(os.path.join(root_dir, 'dist/*'))[0]


def get_cli_output(command):
    return subprocess.check_output(command.split()).decode().strip()


def upload_to_s3(folder):
    asset_path = get_asset_filename()
    branch = get_cli_output('git rev-parse --abbrev-ref HEAD')
    if branch = 'master':
        tag = get_cli_output('git describe --always --abbrev=8 HEAD')
        commit = get_cli_output('git show -s --format=%cd --date=format:%Y%m%d-%H%I%S HEAD')
        bucket = 'releases.lbry.io'
        key = '{}/{}-{}/{}'.format(folder, commit, tag, os.path.basename(asset_path))
    else:
        key = '{}/{}-{}/{}'.format(folder, commit_date, tag, os.path.basename(asset_path))

    print("Uploading {} to s3://{}/{}".format(asset_path, bucket, key))

    if 'AWS_ACCESS_KEY_ID' not in os.environ or 'AWS_SECRET_ACCESS_KEY' not in os.environ:
        print('Must set AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY to publish assets to s3')
        return 1

    s3 = boto3.resource(
        's3',
        aws_access_key_id=os.environ['AWS_ACCESS_KEY_ID'],
        aws_secret_access_key=os.environ['AWS_SECRET_ACCESS_KEY'],
        config=boto3.session.Config(signature_version='s3v4')
    )
    s3.meta.client.upload_file(asset_path, bucket, key)


def upload_to_github_if_tagged(repo_name):
    try:
        current_tag = subprocess.check_output(
            ['git', 'describe', '--exact-match', 'HEAD']).strip()
    except subprocess.CalledProcessError:
        print('Not uploading to GitHub as we are not currently on a tag')
        return 1

    print("Current tag: " + current_tag)

    if 'GH_TOKEN' not in os.environ:
        print('Must set GH_TOKEN in order to publish assets to a release')
        return 1

    gh_token = os.environ['GH_TOKEN']
    auth = github.Github(gh_token)
    repo = auth.get_repo(repo_name)

    if not check_repo_has_tag(repo, current_tag):
        print('Tag {} is not in repo {}'.format(current_tag, repo))
        # TODO: maybe this should be an error
        return 1

    asset_path = get_asset_filename()
    print("Uploading " + asset_path + " to Github tag " + current_tag)
    release = get_github_release(repo, current_tag)
    upload_asset_to_github(release, asset_path, gh_token)


def check_repo_has_tag(repo, target_tag):
    tags = repo.get_tags().get_page(0)
    for tag in tags:
        if tag.name == target_tag:
            return True
    return False


def get_github_release(repo, current_tag):
    for release in repo.get_releases():
        if release.tag_name == current_tag:
            return release
    raise Exception('No release for {} was found'.format(current_tag))


def upload_asset_to_github(release, asset_to_upload, token):
    basename = os.path.basename(asset_to_upload)
    for asset in release.raw_data['assets']:
        if asset['name'] == basename:
            print('File {} has already been uploaded to {}'.format(basename, release.tag_name))
            return

    upload_uri = uritemplate.expand(release.upload_url, {'name': basename})
    count = 0
    while count < 10:
        try:
            output = _curl_uploader(upload_uri, asset_to_upload, token)
            if 'errors' in output:
                raise Exception(output)
            else:
                print('Successfully uploaded to {}'.format(output['browser_download_url']))
        except Exception:
            print('Failed uploading on attempt {}'.format(count + 1))
            count += 1


def _curl_uploader(upload_uri, asset_to_upload, token):
    # using requests.post fails miserably with SSL EPIPE errors. I spent
    # half a day trying to debug before deciding to switch to curl.
    #
    # TODO: actually set the content type
    print('Using curl to upload {} to {}'.format(asset_to_upload, upload_uri))
    cmd = [
        'curl',
        '-sS',
        '-X', 'POST',
        '-u', ':{}'.format(os.environ['GH_TOKEN']),
        '--header', 'Content-Type: application/octet-stream',
        '--data-binary', '@-',
        upload_uri
    ]
    # '-d', '{"some_key": "some_value"}',
    print('Calling curl:')
    print(cmd)
    print('')
    with open(asset_to_upload, 'rb') as fp:
        p = subprocess.Popen(cmd, stdin=fp, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
    stdout, stderr = p.communicate()
    print('curl return code: {}'.format(p.returncode))
    if stderr:
        print('stderr output from curl:')
        print(stderr)
    print('stdout from curl:')
    print(stdout)
    return json.loads(stdout)


if __name__ == '__main__':
    sys.exit(main())