import json
import logging
import asyncio

from iact3.cli import CliCore
from iact3.cli_modules.delete import Delete
from iact3.cli_modules.list import List

from iact3.testing.ros_stack import StackTest
from iact3.config import BaseConfig, PROJECT, REGIONS, TEMPLATE_CONFIG, TESTS, TestConfig, IAC_NAME, \
    DEFAULT_PROJECT_ROOT, OssConfig, Auth, TEMPLATE_LOCATION, DEFAULT_CONFIG_FILE, DEFAULT_OUTPUT_DIRECTORY
from iact3.exceptions import Iact3Exception

from iact3.config import TemplateConfig
from iact3.plugin.ros import StackPlugin
from iact3.termial_print import TerminalPrinter

LOG = logging.getLogger(__name__)

class Policy:
    '''
    Get policies of the templates.
    '''

    def __init__(self, template: str = None, 
                 config_file: str = DEFAULT_CONFIG_FILE,
                 regions: str = None):
        '''
        :param template: path to a template
        :param config_file: path to a config file
        :param regions: comma separated list of regions
        '''
        self.template = template
        self.config_file = config_file
        self.regions = regions
    
    
    @classmethod
    async def create(cls, template: str = None,
                     config_file: str = None,
                     regions: str = None):
        
        args = {}
        if regions:
            args[REGIONS] = regions.split(',')

        project_path = DEFAULT_PROJECT_ROOT


        if template:
            template_config = TemplateConfig(template_location=template)
            template_args = template_config.generate_template_args()
            plugin = StackPlugin(region_id=None, credential=None)
        else:
            base_config = BaseConfig.create(
                project_config_file=config_file or DEFAULT_CONFIG_FILE,
                args={PROJECT: args},
                project_path=project_path
            )
            test_config = base_config.tests.pop(next(iter(base_config.tests)))

            credential = test_config.auth.credential
            template_config = test_config.template_config
            template_args = template_config.generate_template_args()
            plugin = StackPlugin(region_id=None, credential=credential)
        
        LOG.info(f'start getting policies of the templates.')

        policies = await plugin.generate_template_policy(
                **template_args
            )
        TerminalPrinter._display_policies(policies=policies)