#!/usr/bin/env python

# Copyright (c) 2016 Orange and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0

"""Define the parent class of all Functest TestCases."""

import logging
import os

import functest.utils.functest_utils as ft_utils

__author__ = "Cedric Ollivier <cedric.ollivier@orange.com>"


class TestCase(object):
    """Base model for single test case."""

    EX_OK = os.EX_OK
    """everything is OK"""

    EX_RUN_ERROR = os.EX_SOFTWARE
    """run() failed"""

    EX_PUSH_TO_DB_ERROR = os.EX_SOFTWARE - 1
    """push_to_db() failed"""

    EX_TESTCASE_FAILED = os.EX_SOFTWARE - 2
    """results are false"""

    __logger = logging.getLogger(__name__)

    def __init__(self, **kwargs):
        self.details = {}
        self.project_name = kwargs.get('project_name', 'functest')
        self.case_name = kwargs.get('case_name', '')
        self.criteria = kwargs.get('criteria', 100)
        self.result = 0
        self.start_time = 0
        self.stop_time = 0

    def __str__(self):
        try:
            assert self.project_name
            assert self.case_name
            result = 'PASS' if(self.is_successful(
                ) == TestCase.EX_OK) else 'FAIL'
            return ('| {0:<23} | {1:<13} | {2:<10} | {3:<13} |'
                    '\n{4:-<26}{4:-<16}{4:-<13}{4:-<16}{4}'.format(
                        self.case_name, self.project_name,
                        self.get_duration(), result, '+'))
        except AssertionError:
            self.__logger.error("We cannot print invalid objects")
            return '| {0:^68} |\n{1:-<26}{1:-<16}{1:-<13}{1:-<16}{1}'.format(
                'INVALID OBJECT', '+')

    def get_duration(self):
        """Return the duration of the test case.

        Returns:
            duration if start_time and stop_time are set
            "XX:XX" otherwise.
        """
        try:
            assert self.start_time
            assert self.stop_time
            if self.stop_time < self.start_time:
                return "XX:XX"
            return "{0[0]:02.0f}:{0[1]:02.0f}".format(divmod(
                self.stop_time - self.start_time, 60))
        except Exception:  # pylint: disable=broad-except
            self.__logger.error("Please run test before getting the duration")
            return "XX:XX"

    def is_successful(self):
        """Interpret the result of the test case.

        It allows getting the result of TestCase. It completes run()
        which only returns the execution status.

        It can be overriden if checking result is not suitable.

        Returns:
            TestCase.EX_OK if result is 'PASS'.
            TestCase.EX_TESTCASE_FAILED otherwise.
        """
        try:
            assert self.criteria
            if (not isinstance(self.result, str) and
                    not isinstance(self.criteria, str)):
                if self.result >= self.criteria:
                    return TestCase.EX_OK
            else:
                # Backward compatibility
                # It must be removed as soon as TestCase subclasses
                # stop setting result = 'PASS' or 'FAIL'.
                # In this case criteria is unread.
                self.__logger.warning(
                    "Please update result which must be an int!")
                if self.result == 'PASS':
                    return TestCase.EX_OK
        except AssertionError:
            self.__logger.error("Please run test before checking the results")
        return TestCase.EX_TESTCASE_FAILED

    def run(self, **kwargs):
        """Run the test case.

        It allows running TestCase and getting its execution
        status.

        The subclasses must override the default implement<style>.highlight .hll { background-color: #ffffcc }
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