from grafana_backup.create_org import main as create_org
from grafana_backup.api_checks import main as api_checks
from grafana_backup.create_folder import main as create_folder
from grafana_backup.create_datasource import main as create_datasource
from grafana_backup.create_dashboard import main as create_dashboard
from grafana_backup.create_alert_channel import main as create_alert_channel
from grafana_backup.create_user import main as create_user
from grafana_backup.s3_download import main as s3_download
from grafana_backup.azure_storage_download import main as azure_storage_download
from glob import glob
import sys, tarfile, tempfile, os, shutil, fnmatch, collections


def main(args, settings):
    arg_archive_file = args.get('<archive_file>', None)
    aws_s3_bucket_name = settings.get('AWS_S3_BUCKET_NAME')
    azure_storage_container_name = settings.get('AZURE_STORAGE_CONTAINER_NAME')

    (status, json_resp, uid_support, paging_support) = api_checks(settings)

    # Do not continue if API is unavailable or token is not valid
    if not status == 200:
        print("server status is not ok: {0}".format(json_resp))
        sys.exit(1)

    # Use tar data stream if S3 bucket name is specified
    if aws_s3_bucket_name:
        s3_data = s3_download(args, settings)
        try:
            tar = tarfile.open(fileobj=s3_data, mode='r:gz')    
        except Exception as e:
            print(str(e))
            sys.exit(1)
    elif azure_storage_container_name:
        azure_storage_data = azure_storage_download(args, settings)
        try:
            tar = tarfile.open(fileobj=azure_storage_data, mode='r:gz')    
        except Exception as e:
            print(str(e))
            sys.exit(1)
    else:
        try:
            tarfile.is_tarfile(name=arg_archive_file)
        except IOError as e:
            print(str(e))
            sys.exit(1)
        try:
            tar = tarfile.open(name=arg_archive_file, mode='r:gz')
        except Exception as e:
            print(str(e))
            sys.exit(1)

    restore_functions = collections.OrderedDict()
    restore_functions['folder']        = create_folder
    restore_functions['datasource']    = create_datasource
    restore_functions['dashboard']     = create_dashboard
    restore_functions['alert_channel'] = create_alert_channel
    restore_functions['organization']  = create_org
    restore_functions['user']          = create_user

    if sys.version_info >= (3,):
        with tempfile.TemporaryDirectory() as tmpdir:
            tar.extractall(tmpdir)
            tar.close()
            restore_components(args, settings, restore_functions, tmpdir)
    else:
        tmpdir = tempfile.mkdtemp()
        tar.extractall(tmpdir)
        tar.close()
        restore_components(args, settings, restore_functions, tmpdir)
        try:
            shutil.rmtree(tmpdir)
        except OSError as e:
            print("Error: %s : %s" % (tmpdir, e.strerror))


def restore_components(args, settings, restore_functions, tmpdir):
    arg_components = args.get('--components', False)

    if arg_components:
        arg_components_list = arg_components.split(',')

        # Restore only the components that provided via an argument
        # but must also exist in extracted archive
        for ext in arg_components_list:
            if sys.version_info >= (3,):
                for file_path in glob('{0}/**/*.{1}'.format(tmpdir, ext[:-1]), recursive=True):
                    print('restoring {0}: {1}'.format(ext, file_path))
                    restore_functions[ext[:-1]](args, settings, file_path)
            else:
                for root, dirnames, filenames in os.walk('{0}'.format(tmpdir)):
                    for filename in fnmatch.filter(filenames, '*.{0}'.format(ext[:-1])):
                        file_path = os.path.join(root, filename)
                        print('restoring {0}: {1}'.format(ext, file_path))
                        restore_functions[ext[:-1]](args, settings, file_path)
    else:
        # Restore every component included in extracted archive
        for ext in restore_functions.keys():
            if sys.version_info >= (3,):
                for file_path in glob('{0}/**/*.{1}'.format(tmpdir, ext), recursive=True):
                    print('restoring {0}: {1}'.format(ext, file_path))
                    restore_functions[ext](args, settings, file_path)
            else:
                for root, dirnames, filenames in os.walk('{0}'.format(tmpdir)):
                    for filename in fnmatch.filter(filenames, '*.{0}'.format(ext)):
                        file_path = os.path.join(root, filename)
                        print('restoring {0}: {1}'.format(ext, file_path))
                        restore_functions[ext](args, settings, file_path)