# Klasse zum Austauschen von Genitiv durch Dativ


import spacy


class GenitivSolve(object):
    
    def __init__(self):
        
        #print('loading the german spacy model..')
        self.nlp = spacy.load('de_core_news_sm')
        #print('done')
        
        return
    
    def ReplaceGenitivWithDativ(self, sentences):
        
        

        count = 0
        for sentence in sentences:
            
            count += 1
            #print('processing sentence', count)
            
            tokens = self.nlp(' '.join(sentence))
            
            
            
            for n in range(1, len(sentence)):
                
                
                #print(sentence[n])
                if (sentence[n][-1] == 's' or sentence[n][-1] == 'n') and (sentence[n - 1] == 'des' or sentence[n - 1] == 'Des'):
                    
                    #print('oi')
                    #print('genitiv', sentence[n], sentence[n][:-2])
                    if sentence[n][-2] == 'e':
                        sentence[n] = sentence[n][:-2]
                    else:
                        sentence[n] = sentence[n][:-1]
                    sentence[n - 1] = 'dem'
                    sentence.insert(n - 1, 'von')
                
                
                if sentence[n] == 'der' and sentence[n - 1][-1] != ',' and (tokens[n - 1].tag_ == 'NN' and tokens[n-1].text == sentence[n]) and sentence[n][-2:] != 'en':
                    
                    sentence.insert(n, 'von')
                
                if sentence[n] == 'der' and sentence[n - 1][-1] != ',' and (tokens[n - 1].tag_ == 'NN' and tokens[n-1].text == sentence[n]) and ((sentence[n+1][-2:] == 'en' or sentence[n+1][-1] == 'n' or sentence[n+1][-1] == 'e' or sentence[n+1][-2:] == 'er')):
                    
                    if sentence[n+1][-1] == 'e':
                        sentence[n+1] + 'n'
                    
                    sentence[n] == 'den'
                    sentence.insert(n, 'von')
                
        return sentences