# -*- coding: utf-8 -*-
import configparser as ConfigParser
import csv
import functools
import logging
import random
import re
import sys
from pathlib import Path
import pickle
import spacy
import textacy
from scipy import *
import os

csv.field_size_limit(sys.maxsize)
FILEPATH = os.path.dirname(os.path.realpath(__file__)) + "/"



# load config
config_ini = FILEPATH + "config.ini"

config = ConfigParser.ConfigParser()
with open(config_ini) as f:
    config.read_file(f)



# config logging
filename = FILEPATH + config.get("logging","filename")
level = config.get("logging","level")
if level == "INFO":
    level = logging.INFO
elif level == "DEBUG":
    level = logging.DEBUG
elif level == "WARNING":
    level = logging.WARNING
logging.basicConfig(filename=filename, level=level)



def printlog(string, level="INFO"):
    """log and prints"""
    print(string)
    if level == "INFO":
        logging.info(string)
    elif level == "DEBUG":
        logging.debug(string)
    elif level == "WARNING":
        logging.warning(string)


def compose(*functions):
    def compose2(f, g):
        return lambda x: f(g(x))

    return functools.reduce(compose2, functions, lambda x: x)


def get_calling_function():
    """finds the calling function in many decent cases.
    https://stackoverflow.com/questions/39078467/python-how-to-get-the-calling-function-not-just-its-name
    """
    fr = sys._getframe(1)  # inspect.stack()[1][0]
    co = fr.f_code
    for get in (
            lambda: fr.f_globals[co.co_name],
            lambda: getattr(fr.f_locals['self'], co.co_name),
            lambda: getattr(fr.f_locals['cls'], co.co_name),
            lambda: fr.f_back.f_locals[co.co_name],  # nested
            lambda: fr.f_back.f_locals['func'],  # decorators
            lambda: fr.f_back.f_locals['meth'],
            lambda: fr.f_back.f_locals['f'],
    ):
        try:
            func = get()
        except (KeyError, AttributeError):
            pass
        else:
            if func.__code__ == co:
                return func
    raise AttributeError("func not found")


def save_obj(obj, path):
    with open(path , 'wb') as f:
        pickle.dump(obj, f, pickle.HIGHEST_PROTOCOL)

def load_obj(path):
    with open(path, 'rb') as f:
        return pickle.load(f)

def replaceRockDots():
    return lambda string: re.sub(r'[ß]', "ss",
                                 (re.sub(r'[ö]', "oe",
                                         (re.sub(r'[ü]', "ue", (re.sub(r'[ä]', "ae", string.lower())))))))

def list_from_files(*paths):
    """
    create string-list from file like
        n1
        n2
        n3

    :param paths: list(str) or str if single path
    :return: list(str)
    """

    listlist = []
    for path in paths:
        listlist.append(list(textacy.fileio.read_file_lines(path)))

    #liste von listen zu einer liste
    liste = [item for sublist in listlist for item in sublist]

    return list(map(textacy.preprocess.normalize_whitespace, liste))





def printRandomDoc(textacyCorpus):
    """
    printlogss random doc out of a textacy-Corpus
    :param textacyCorpus:
    """
    print()
    if len(textacyCorpus) == 0:
        printlog("NO DOCS IN CORPUS")
    else:
        printlog("len(textacyCorpus) = %i" % len(textacyCorpus))
        randIndex = int((len(textacyCorpus) - 1) * random.random())
        printlog("Index: {0} \n Text: {1} \n Metadata: {2}\n".format(randIndex, textacyCorpus[randIndex].text,
                                                                textacyCorpus[randIndex].metadata['categoryName']))

    print()






def save_corpus(corpus, corpus_path, corpus_name):
    """
    saves a textacy-corpus including spacy-parser
    :param corpus: textacy-Corpus
    :param corpus_path: str
    :param corpus_name: str (should content the language like "_de_")
    """

    """
    # save stringstore
    stringstore_path = corpus_path + corpus_name + '_strings.json'
    with open(stringstore_path, "w") as file:
        parser.vocab.strings.dump(file)

    #todo save vocab?
   """

    # save parser
    parser = corpus.spacy_lang
    parserpath = corpus_path + str(parser.lang) + '_parser'
    parser.save_to_directory(parserpath)

    # save content
    contentpath = corpus_path + corpus_name + "_content.bin"
    textacy.fileio.write_spacy_docs((doc.spacy_doc for doc in corpus), contentpath)

    # save meta
    metapath = corpus_path + corpus_name + "_meta.json"
    textacy.fileio.write_json_lines((doc.metadata for doc in corpus), metapath)





def load_corpus(corpus_path, corpus_name, lang="de"):
    """
    Load textacy-Corpus including spacy-parser out from file
    :param corpus_path: str
    :param corpus_name: str (should content the language like "_de_")
    :param lang: str (language code) ir spacy.Language
    :return: texracy.Corpus, spacy.language
    """

    #ckeck for language
    if "de_" in corpus_name:
        lang="de"
    elif "en_" in corpus_name:
        lang ="en"


    # load parser
    parser = spacy.load(lang)


    stringstorepath = corpus_path + str(lang) + '_parser'+'/vocab/strings.json'
    with open(stringstorepath) as file:
        parser.vocab.strings.load(file)

    vocabpath = Path(corpus_path + str(lang) + '_parser'+'/vocab/lexemes.bin')
    parser.vocab.load_lexemes(vocabpath)

    #load corpus
    corpus = textacy.Corpus(parser)


    contentpath = corpus_path + corpus_name + "_content.bin"
    metapath = corpus_path + corpus_name + "_meta.json"


    metadata_stream = textacy.fileio.read_json_lines(metapath)
    spacy_docs = textacy.fileio.read_spacy_docs(corpus.spacy_vocab, contentpath)
    for spacy_doc, metadata in zip(spacy_docs, metadata_stream):
        corpus.add_doc(
            textacy.Doc(spacy_doc, lang=corpus.spacy_lang, metadata=metadata))
    return corpus, corpus.spacy_lang