import argparse
import datetime
import glob
import json
import os

from typing import List
from unittest import TestSuite, TestLoader, TestCase, TestResult
from zipfile import ZipFile

from HTMLTestRunner import HTMLTestRunner

from ews.coordinator.processor_base import ProcessorBase


class IntegrationTestUtils:

    EMAIL_CRED_PATH: str = "../../test_data/test_deployment/envs/Cred_gmail.json"
    LOGGING_CONFIG_PATH: str = "../../test_data/test_deployment/envs/test_log_config.json"
    DEFAULT_SYS_CONFIG_FILE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/configs/sys_config_EastAfrica_fc_live.json"
    DEFAULT_DEPO_CONFIG_FILE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/configs/depo_config_EastAfrica_fc_live.json"
    DEFAULT_ENV_SUIT_CONFIG_FILE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/configs/env_suit_config_EastAfrica_fc_live.json"
    DEFAULT_EPI_CONFIG_FILE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/configs/epi_config_EastAfrica_fc_live.json"
    DEFAULT_SURVEY_CONFIG_FILE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/configs/survey_config_EastAfrica_fc_live.json"
    DEFAULT_ADVISORY_CONFIG_FILE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/configs/advisory_config_EastAfrica_fc_live.json"

    TEST_WORKSPACE_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/workspace/"
    TEMP_SYS_CONFIG_FILE_NAME: str = None
    TEMP_RUN_CONFIG_FILE_NAME: str = None

    TEST_ASSETS_PATH: str = "../../test_data/test_deployment/regions/EastAfrica/resources/coordinator/assets/"
    EXAMPLE_SURVEY_FILE_PATH: str = TEST_ASSETS_PATH + "example_survey_run.zip"
    EXAMPLE_DEPO_FILE_PATH: str = TEST_ASSETS_PATH + "example_depo_run.zip"
    EXAMPLE_ENV_SUIT_FILE_PATH: str = TEST_ASSETS_PATH + "example_env_suit_run.zip"

    TEST_OUT_PATH: str = None
    TEST_START_DATE: str = None
    TEST_JOB_DIR: str = None

    @staticmethod
    def check_resources_exist():
        """
        do a single check for the email cred file, which will raise an error suggesting that the user may not have set
        their pythonpath correctly
        """
        emailcred_exists = os.path.exists(IntegrationTestUtils.EMAIL_CRED_PATH)
        if not emailcred_exists:
            raise FileNotFoundError(f"email cred file {IntegrationTestUtils.EMAIL_CRED_PATH} not found - have you set "
                                    f"the working directory to the same directory as the tests you are running?"
                                    f" (tests use a path relative to the test directory)")

    @staticmethod
    def build_arg_parser() -> argparse.ArgumentParser:
        parser = argparse.ArgumentParser()
        parser.add_argument('--config', required = True)
        parser.add_argument('--outdir', required = True)
        parser.add_argument('--email_cred', required = True)
        parser.add_argument('--test_report_dir', required = False)
        parser.add_argument('--run_date_type', required = False)
        parser.add_argument('--custom_run_date', required = False)
        parser.add_argument('unittest_args', nargs='*')
        return parser

    @staticmethod
    def run_full_integration_test_pipeline(test_case: [TestCase],
                                           test_prefix: str,
                                           processor_dir: str) -> bool:

        """
        Runs the full integration tests on the production server GitlabRunner. The full integration tests are run on
        a GitlabRunner that runs on the production server, and mounts the local file system to use the production
        configuration files.

        :param test_case:
        :param test_prefix:
        :param processor_dir:
        :return:
        """

        _parser = IntegrationTestUtils.build_arg_parser()

        _args = _parser.parse_args()
        _config_file: str = _args.config
        _outdir: str = _args.outdir
        _email_cred_path: str = _args.email_cred
        _test_report_dir: str = _args.test_report_dir
        _run_date_type: str = _args.run_date_type
        _custom_run_date: str = _args.custom_run_date

        IntegrationTestUtils.DEFAULT_CONFIG_FILE_PATH = _config_file

        nowstring: str = IntegrationTestUtils.get_now_string()
        prefix: str = f"temp_{test_prefix}_" + nowstring
        # prefix: str = f"temp_{test_prefix}"
        IntegrationTestUtils.TEST_OUT_PATH = _outdir + prefix + os.sep
        IntegrationTestUtils.EMAIL_CRED_PATH = _email_cred_path

        IntegrationTestUtils.TEST_START_DATE = IntegrationTestUtils.generate_run_date(_run_date_type,
                                                                                      _custom_run_date)

        IntegrationTestUtils.TEST_JOB_DIR = os.path.join(IntegrationTestUtils.TEST_OUT_PATH,
                                                         f"{processor_dir}_" +
                                                         IntegrationTestUtils.TEST_START_DATE)

        tests: TestSuite = TestLoader().loadTestsFromTestCase(test_case)

        if _test_report_dir is None:
            _test_report_dir = IntegrationTestUtils.TEST_JOB_DIR

        """
        the HTMLTestRunner will create the directory if it does not exist, we are putting the output into the 
        TEST_OUT_PATH, which is the top-level test directory for this run, not the TEST_JOB_DIR, which is the dir
        for the pipeline being tested
        """
        runner = HTMLTestRunner(output = IntegrationTestUtils.TEST_OUT_PATH)
        result: TestResult = runner.run(tests)
        return result.wasSuccessful()


    @staticmethod
    def load_json_file(file: str) -> dict:
        with open(file) as config_file:
            config: dict = json.load(config_file)
            return config


    @staticmethod
    def write_json_file(values: dict, file: str):
        with open(file, 'w') as file:
            json.dump(values, file, indent = 4)


    @staticmethod
    def get_now_string() -> str:
        nowstring: str = datetime.datetime.today().strftime('%Y-%m-%d_%H%M%S')
        return nowstring


    @staticmethod
    def unpack_zip(zip_to_unpack: str, out_file: str):
        with ZipFile(zip_to_unpack) as zf:  # open the zip file
            for target_file in zf.namelist():  # check if the file exists in the archive
                zf.extract(target_file, out_file)

    @staticmethod
    def count_files_in_wildcard(wildcard: str) -> int:
        results = glob.glob(wildcard)
        return len(results)


    @staticmethod
    def check_file_not_empty(file_path: str) -> bool:
        return os.stat(file_path).st_size != 0

    @staticmethod
    def check_file_exists(file_path: str) -> bool:
        return os.path.isfile(file_path)

    @staticmethod
    def check_wildcard_exists_and_not_empty(wildcard: str) -> bool:

        """
        requires at least one file matching the wildcard to exist and not be empty
        """
        result = False
        files: List[str] = glob.glob(wildcard)
        for file in files:
            result = IntegrationTestUtils.check_file_not_empty(file)
            if result is False:
                break
        return result

    @staticmethod
    def check_file_exists_and_not_empty(file_path: str) -> bool:
        file_exists = IntegrationTestUtils.check_file_exists(file_path)
        file_not_empty = IntegrationTestUtils.check_file_not_empty(file_path)
        return file_exists and file_not_empty

    @staticmethod
    def run_partial_integration_test_pipeline(component: str,
                                              shortname: str,
                                              start_date: str,
                                              processor: ProcessorBase,
                                              **kwargs):

        """
        Runs the "run_Process" function in Processor.py with the given arguments for the partial integration tests.
        The full integration pipeline is run in the "run_full_integration_test_pipeline" function.

        :param processor:
        :param component:
        :param shortname:
        :param start_date:
        :param kwargs:
        :return:
        """

        args_dict: dict = {}

        sys_config_path = IntegrationTestUtils.TEMP_SYS_CONFIG_FILE_NAME
        config_paths = [IntegrationTestUtils.TEMP_RUN_CONFIG_FILE_NAME]

        # note, possible to override these values in the kwargs loop below
        args_dict['live'] = False
        args_dict['noupload'] = True
        args_dict['start_date'] = start_date
        args_dict['component'] = component
        args_dict['short_name'] = shortname
        args_dict['sys_config_path'] = sys_config_path
        args_dict['config_paths'] = config_paths
        args_dict['log_level'] = 'info'
        args_dict['clearup'] = True

        for key, value in kwargs.items():
            args_dict[key] = value

        #  need EMAIL_CRED in the environment before we run a Processor
        os.environ["EMAIL_CRED"] = IntegrationTestUtils.EMAIL_CRED_PATH
        #  need LOGGING_CONFIG_PATH in the environment before we run a Processor
        os.environ["LOGGING_CONFIG"] = IntegrationTestUtils.LOGGING_CONFIG_PATH

        try:
            processor.run_process(args_dict)
        except SystemExit:
            # we will eventually want to throw these to the calling class to be dealt with
            pass

    @staticmethod
    def run_external_pipeline(component: str,
                              short_name: str,
                              start_date: str,
                              processor: ProcessorBase,
                              **kwargs):

        args_dict: dict = {}

        # note, possible to override these values in the kwargs loop below
        args_dict['live'] = False
        args_dict['noupload'] = True
        args_dict['start_date'] = start_date
        args_dict['component'] = component
        args_dict['short_name'] = short_name
        args_dict['config_paths'] = [IntegrationTestUtils.TEMP_RUN_CONFIG_FILE_NAME]
        args_dict['log_level'] = 'info'
        args_dict['clearup'] = True

        for key, value in kwargs.items():
            args_dict[key] = value

        #  need EMAIL_CRED in the environment before we run a Processor
        os.environ["EMAIL_CRED"] = IntegrationTestUtils.EMAIL_CRED_PATH
        #  need LOGGING_CONFIG_PATH in the environment before we run a Processor
        os.environ["LOGGING_CONFIG"] = IntegrationTestUtils.LOGGING_CONFIG_PATH

        try:
            processor.run_process(args_dict)
        except SystemExit:
            # we will eventually want to throw these to the calling class to be dealt with
            pass


    @staticmethod
    def get_day_before_as_string(input_date_string: str) -> str:
        date_format = "%Y%m%d"
        input_date: datetime = datetime.datetime.strptime(input_date_string, date_format)
        yesterday_date = input_date - datetime.timedelta(days = 1)
        yesterday_string = yesterday_date.strftime(date_format)
        return yesterday_string


    @staticmethod
    def generate_run_date(run_date_type: str,
                          custom_run_date: str) -> str:

        if run_date_type == "today":
            print("today")
            today = datetime.date.today()
            today_string = today.strftime("%Y%m%d")
            result = today_string
        elif run_date_type == "yesterday":
            print("yesterday")
            today = datetime.date.today()
            yesterday: datetime = today - datetime.timedelta(days = 1)
            yesterday_string = yesterday.strftime("%Y%m%d")
            result = yesterday_string
        elif run_date_type == "custom":
            result = custom_run_date
        else:
            print("default")
            result = "20231127"

        return result