#!/usr/bin/python

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import os, sys, json
from fabric.api import *
import argparse


parser = argparse.ArgumentParser()
parser.add_argument('--storage', type=str, default='')
parser.add_argument('--cloud', type=str, default='')
parser.add_argument('--os_user', type=str, default='')
parser.add_argument('--cluster_name', type=str, default='')
parser.add_argument('--azure_storage_account', type=str, default='')
parser.add_argument('--azure_datalake_account', type=str, default='')
args = parser.parse_args()


def prepare_templates():
    local('mv /tmp/rstudio /home/{0}/test_templates'.format(args.os_user))

def get_storage():
    storages = {"aws": args.storage,
                "azure": "{0}@{1}.blob.core.windows.net".format(args.storage, args.azure_storage_account),
                "gcp": args.storage}
    protocols = {"aws": "s3a", "azure": "wasbs", "gcp": "gs"}
    if args.azure_datalake_account:
        storages['azure'] = "{0}.azuredatalakestore.net/{1}".format(args.azure_datalake_account, args.storage)
        protocols['azure'] = 'adl'
    return (storages[args.cloud], protocols[args.cloud])

def prepare_rscript(template_path, rscript_name, kernel='remote'):
    with open(template_path, 'r') as f:
        text = f.read()
    text = text.replace('WORKING_STORAGE', get_storage()[0])
    text = text.replace('PROTOCOL_NAME', get_storage()[1])
    if kernel == 'remote':
        if '-de-' in args.cluster_name:
            text = text.replace('MASTER', 'master')
        elif '-des-' in args.cluster_name:
            text = text.replace('MASTER', 'master = "yarn"')
    elif kernel == 'local':
        text = text.replace('MASTER', 'master = "local[*]"')
    with open('/home/{}/{}.r'.format(args.os_user, rscript_name), 'w') as f:
        f.write(text)

def enable_local_kernel():
    local("sed -i 's/^master/#master/' /home/{0}/.Rprofile".format(args.os_user))
    local('''sed -i "s/^/#/g" /home/{0}/.Renviron'''.format(args.os_user))
    local('''sed -i "/\/opt\/spark\//s/#//g" /home/{0}/.Renviron'''.format(args.os_user))
    local('rm -f metastore_db/db* derby.log')

def run_rscript(rscript_name):
    local('R < /home/{0}/{1}.r --no-save'.format(args.os_user, rscript_name))


if __name__ == "__main__":
    try:
        prepare_templates()
        # Running on remote kernel
        prepare_rscript('/home/{}/test_templates/template_preparation.r'.format(args.os_user), 'preparation', 'remote')
        run_rscript('preparation')
        prepare_rscript('/home/{}/test_templates/template_visualization.r'.format(args.os_user), 'visualization', 'remote')
        run_rscript('visualization')
        # Running on local kernel
        enable_local_kernel()
        prepare_rscript('/home/{}/test_templates/template_preparation.r'.format(args.os_user), 'preparation', 'local')
        prepare_rscript('/home/{}/test_templates/template_visualization.r'.format(args.os_user), 'visualization', 'local')
        run_rscript('preparation')
        run_rscript('visualization')
    except Exception as err:
        print('Error!', str(err))
        sys.exit(1)

    sys.exit(0)