#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
"""
report (Report Module)
======================

**Author:**

* Dirk Alders <sudo-dirk@mount-mockery.de>

**Description:**

    The Module is designed to help with python logging and to support some handlers for logging to memory.

**Submodules:**

* :class:`report.collectingHandler`
* :class:`report.collectingRingHandler`
* :class:`report.collectingTestcaseHandler`
* :func:`report.consoleLoggingConfigure`
* :class:`report.testSession`


**Unittest:**

        See also the :download:`unittest <../../report/_testresults_/unittest.pdf>` documentation.
"""
__DEPENDENCIES__ = []

import collections
import json
import logging
from logging.config import dictConfig
import os
import sys

try:
    from config import APP_NAME as ROOT_LOGGER_NAME
except ImportError:
    ROOT_LOGGER_NAME = 'root'
logger = logging.getLogger(ROOT_LOGGER_NAME).getChild(__name__)

__DESCRIPTION__ = """The Module {\\tt %s} is designed to help with python logging and to support some handlers for logging to memory.
For more Information read the sphinx documentation.""" % __name__.replace('_', '\_')
"""The Module Description"""
__INTERPRETER__ = (3, )
"""The Tested Interpreter-Versions"""

SHORT_FMT = "%(asctime)s: %(name)s - %(levelname)s - %(message)s"
""" A short formatter including the most important information"""
LONG_FMT = SHORT_FMT + \
    "\n                         File \"%(pathname)s\", line %(lineno)d, in %(funcName)s"
""" A long formatter which results in links to the source code inside Eclipse"""
MAX_FMT = """
%(name)s
%(levelno)s
%(levelname)s
%(pathname)s
%(filename)s
%(module)s
%(lineno)d
%(funcName)s
%(created)f
%(asctime)s
%(msecs)d
%(relativeCreated)d
%(thread)d
%(threadName)s
%(process)d
%(message)s"""
DEFAULT_FMT = LONG_FMT
"""The default formatstring"""


class collectingHandler(logging.Handler):
    MY_LOGS = []

    def __init__(self):
        logging.Handler.__init__(self)
        self.setFormatter(logging.Formatter(MAX_FMT))
        self.setLevel(logging.DEBUG)

    def emit(self, record):
        self.format(record)
        self.MY_LOGS.append(record.__dict__)

    def make_independent(self):
        self.MY_LOGS = []

    def get_logs(self):
        rv = []
        while len(self.MY_LOGS) > 0:
            rv.append(self.MY_LOGS.pop(0))
        return rv

    def get_str(self, logs=None, fmt=SHORT_FMT):
        logs = logs or self.MY_LOGS
        return '\n'.join([fmt % log for log in logs])

    def __len__(self):
        return len(self.MY_LOGS)

    def __str__(self):
        return self.get_str(self.MY_LOGS)


class collectingRingHandler(collectingHandler):
    MY_LOGS = collections.deque([], 10)

    def __init__(self, max_logs=None):
        collectingHandler.__init__(self)
        if max_logs is not None and max_logs != self.MY_LOGS.maxlen:
            self.MY_LOGS.__init__(list(self.MY_LOGS), max_logs)

    def make_independent(self):
        self.MY_LOGS = collections.deque([], self.MY_LOGS.maxlen)

    def get_logs(self):
        return list(self.MY_LOGS)


TCEL_SINGLE = 0
"""Testcase level (smoke), this is just a rough test for the main functionality"""
TCEL_SMOKE = 10
"""Testcase level (smoke), this is just a rough test for the main functionality"""
TCEL_SHORT = 50
"""Testcase level (short), this is a short test for an extended functionality"""
TCEL_FULL = 90
"""Testcase level (full), this is a complete test for the full functionality"""
TCEL_NAMES = {
    TCEL_SINGLE: 'Single Test',
    TCEL_SMOKE: 'Smoke Test (Minumum subset)',
    TCEL_SHORT: 'Short Test (Subset)',
    TCEL_FULL: 'Full Test (all defined tests)'
}
"""Dictionary for resolving the test case levels (TCL) to a (human readable) name"""

TCEL_REVERSE_NAMED = {
    'short': TCEL_SHORT,
    'smoke': TCEL_SMOKE,
    'single': TCEL_SINGLE,
    'full': TCEL_FULL,
}
"""Dictionary for resolving named test case levels (TCL) to test case level number"""


class collectingTestcaseHandler(collectingHandler):
    MY_LOGS = []

    def emit(self, record):
        self.format(record)
        self.MY_LOGS.append(record.__dict__)
        self.MY_LOGS[-1]['moduleLogger'] = collectingHandler().get_logs()


class JsonFormatter(logging.Formatter):
    def format(self, record):
        obj = {}
        for key in ["name", "levelno", "levelname", "pathname", "filename", "module", "lineno", "funcName", "created", "msecs", "relativeCreated", "thread", "threadName", "process", "processName", "msg", "args", "exc_info", "exc_text"]:
            obj[key] = getattr(record, key)
        obj["msg"] = obj["msg"] % obj["args"]
        return json.dumps(obj)


def appLoggingConfigure(basepath, target, log_name_lvl=[], target_level=logging.DEBUG, fmt=SHORT_FMT, ring_logs=None, host=None, port=None):
    target_handlers = ['main', ]
    # define handler
    #
    if target == 'stdout':
        handler = dict(main={
            'level': logging.getLevelName(target_level),
            'formatter': 'format',
            'class': 'logging.StreamHandler',
            'stream': 'ext://sys.stdout',
        })
    elif target == 'logfile':
        handler = dict(main={
            'level': logging.getLevelName(target_level),
            'formatter': 'json',
            'class': 'logging.handlers.RotatingFileHandler',
            'filename': os.path.join(basepath, 'messages.log'),
            'mode': 'a',
            'maxBytes': 10485760,
            'backupCount': 7
        })
    else:
        handler = dict(main={
            'level': 'DEBUG',
            'formatter': 'json',
            'class': 'logging.NullHandler',
        })
    if host is not None and port is not None:
        target_handlers.append('socket')
        handler['socket'] = {
            'level': 'DEBUG',
            'class': 'logging.handlers.SocketHandler',
            'host': host,
            'port': port
        }
    if ring_logs is not None:
        target_handlers.append('ring')
        handler['ring'] = {
            'class': 'report.collectingRingHandler',
            'max_logs': ring_logs,
        }
    # define loggers
    #
    loggers = {}
    for name, lvl in log_name_lvl:
        loggers[name] = {
            'handlers': target_handlers,
            'level': lvl,
            'propagate': False
        }
    # configure logging
    #
    dictConfig(dict(
        version=1,
        formatters={
            'json': {
                '()': JsonFormatter
            },
            'long': {
                'format': LONG_FMT
            },
            'format': {
                'format': fmt,
            },
        },
        handlers=handler,
        loggers=loggers,
    ))


def stdoutLoggingConfigure(log_name_lvl=[], fmt=SHORT_FMT):
    appLoggingConfigure(None, 'stdout', log_name_lvl=log_name_lvl, fmt=fmt)


class testSession(dict):
    KEY_NAME = 'name'
    KEY_FAILED_TESTS = 'number_of_failed_tests'
    KEY_POSSIBLY_FAILED_TESTS = 'number_of_possibly_failed_tests'
    KEY_SUCCESS_TESTS = 'number_of_successfull_tests'
    KEY_ALL_TESTS = 'number_of_tests'
    KEY_EXEC_LVL = 'testcase_execution_level'
    KEY_EXEC_NAMES = 'testcase_names'
    KEY_LVL_NAMES = 'level_names'
    KEY_TESTCASELIST = 'testcases'
    KEY_UID_LIST = 'uid_list_sorted'
    #
    DEFAULT_BASE_DATA = {
        KEY_NAME: 'Default Testsession name',
        KEY_FAILED_TESTS: 0,
        KEY_POSSIBLY_FAILED_TESTS: 0,
        KEY_FAILED_TESTS: 0,
        KEY_SUCCESS_TESTS: 0,
        KEY_ALL_TESTS: 0,
        KEY_EXEC_LVL: TCEL_FULL,
        KEY_EXEC_NAMES: TCEL_NAMES,
    }

    def __init__(self, module_names=[], **kwargs):
        dict.__init__(self, time_consumption=0.)
        self.__testcase__ = None
        self.__set_base_data__(**kwargs)
        self.__configure_logging__(module_names)

    def __set_base_data__(self, **kwargs):
        for key in set([key for key in self.DEFAULT_BASE_DATA.keys()] + [key for key in kwargs.keys()]):
            self[key] = kwargs.get(key, self.DEFAULT_BASE_DATA.get(key))
        self[self.KEY_TESTCASELIST] = {}
        self[self.KEY_UID_LIST] = []

    def __configure_logging__(self, module_names):
        #
        # Configure logging for testSession
        #
        logging_config = dict(
            version=1,
            formatters={
                'short': {
                    'format': SHORT_FMT,
                },
                'long': {
                    'format': LONG_FMT,
                },
            },
            handlers={
                'console': {
                    'level': 'DEBUG',
                    'class': 'logging.NullHandler',
                    'formatter': 'short',
                },
                'module_logs': {
                    'level': 'DEBUG',
                    'class': 'report.collectingHandler',
                    'formatter': 'short',
                },
                'testcase_logs': {
                    'level': 'DEBUG',
                    'class': 'report.collectingTestcaseHandler',
                    'formatter': 'short',
                },
            },
            loggers=self.__module_loggers__(module_names),
        )
        dictConfig(logging_config)

    def __module_loggers__(self, module_names):
        rv = {}
        rv['__tLogger__'] = dict(handlers=['console', 'testcase_logs'], level='DEBUG', propagate=False)
        for name in module_names + ['__mLogger__']:
            rv[name] = dict(handlers=['console', 'module_logs'], level='DEBUG', propagate=False)
        return rv

    def testCase(self, name, testcase_execution_level, test_method, *args, **kwargs):
        if testcase_execution_level <= self[self.KEY_EXEC_LVL]:
            sys.stdout.write('     %s...' % name[:75])
            tLogger = logging.getLogger('__tLogger__')
            tHandler = collectingTestcaseHandler()
            if len(tHandler.MY_LOGS) > 0:
                raise AttributeError("Testcaselogger shall be empty after closing testcase!")
            tLogger._log(logging.DEBUG, name, None)
            if len(tHandler.MY_LOGS) != 1:
                raise AttributeError("Testcaselogger shall have only one entry for the main testcase (temporary)!")
            self.__testcase__ = tHandler.get_logs()[0]
            test_method(logging.getLogger('__tLogger__'), *args, **kwargs)
            self.__close_active_testcase__()

    def __close_active_testcase__(self):
        if self.__testcase__ is not None:
            name = self.__testcase__.get('message')
            #
            # Add testcase
            #
            tch = collectingTestcaseHandler()
            self.__testcase__['testcaseLogger'] = tch.get_logs()
            if name in self[self.KEY_TESTCASELIST]:
                raise AttributeError("Testcase named %s already exists" % name)
            self[self.KEY_TESTCASELIST][name] = self.__testcase__
            self[self.KEY_UID_LIST].append(name)
            #
            # Adapt testcase data
            #
            self[self.KEY_TESTCASELIST][name]['levelno'] = 0
            self[self.KEY_TESTCASELIST][name]['time_consumption'] = 0.
            for teststep in self[self.KEY_TESTCASELIST][name]['testcaseLogger']:
                # store maximum level to testcase
                if teststep.get('levelno') > self[self.KEY_TESTCASELIST][name]['levelno']:
                    self[self.KEY_TESTCASELIST][name]['levelno'] = teststep.get('levelno')
                    self[self.KEY_TESTCASELIST][name]['levelname'] = teststep.get('levelname')
                # store time_consumption for teststep
                try:
                    teststep['time_consumption'] = teststep['created'] - teststep['moduleLogger'][-1]['created']
                except IndexError:
                    teststep['time_consumption'] = 0.
                # Increment testcase time_comsumption
            # Increment testcase counters
            #
            self[self.KEY_ALL_TESTS] += 1
            if self[self.KEY_TESTCASELIST][name]['levelno'] <= logging.INFO:
                self[self.KEY_SUCCESS_TESTS] += 1
                sys.stdout.write('\033[92mSUCCESS\033[0m\n')
            elif self[self.KEY_TESTCASELIST][name]['levelno'] >= logging.ERROR:
                self[self.KEY_FAILED_TESTS] += 1
                sys.stdout.write('\033[91mFAILED\033[0m\n')
            else:
                self[self.KEY_POSSIBLY_FAILED_TESTS] += 1
                sys.stdout.write('\033[93mPOSSIBLY FAILED\033[0m\n')
            # Set testcase time and time_consumption
            self[self.KEY_TESTCASELIST][name]['time_start'] = self.__testcase__['asctime']
            self[self.KEY_TESTCASELIST][name]['time_finished'] = teststep['asctime']
            self[self.KEY_TESTCASELIST][name]['time_consumption'] = teststep['created'] - self.__testcase__['created']
            # Set testcase time consumption
            self['time_consumption'] += self[self.KEY_TESTCASELIST][name]['time_consumption']
        self.__testcase__ = None