from flask import Flask, request, jsonify
import requests
import json

app = Flask(__name__)

# Laden der API-Keys aus einer Konfigurationsdatei
def load_api_keys():
    try:
        with open("config.json", "r") as file:
            return json.load(file)
    except FileNotFoundError:
        return {"synonym_api_keys": {"primary": "", "secondary": ""}, "grammar_api_key": ""}

# Speichern der API-Keys
def save_api_keys(api_keys):
    with open("config.json", "w") as file:
        json.dump(api_keys, file)

# API-Dienst für Synonyme (mit Fallback)
class SynonymAPI:
    def __init__(self, api_keys):
        self.api_keys = api_keys

    def fetch(self, word, language='en'):
        try:
            response = self._fetch_from_primary_api(word, language)
            if response.status_code == 200:
                return response.json()['entries'][0]['synonyms']
        except Exception:
            return self._fetch_from_secondary_api(word, language)

    def _fetch_from_primary_api(self, word, language):
        url = f"https://lingua-robot.p.rapidapi.com/language/v1/synonyms?word={word}&language={language}"
        headers = {
            'x-rapidapi-key': self.api_keys['primary'],
            'x-rapidapi-host': "lingua-robot.p.rapidapi.com"
        }
        return requests.get(url, headers=headers)

    def _fetch_from_secondary_api(self, word, language):
        url = f"https://api.datamuse.com/words?rel_syn={word}&ml={language}"
        return requests.get(url)

# API-Dienst für Grammatik
class GrammarAPI:
    def __init__(self, api_key):
        self.api_key = api_key

    def fetch(self, text, language='en'):
        response = requests.post(self.api_key, data={'text': text, 'language': language})
        return response.json()['matches'] if response.status_code == 200 else []

# API Manager zum Verwalten der Dienste
class APIManager:
    def __init__(self):
        self.synonym_api = None
        self.grammar_api = None

    def configure_apis(self, synonym_api_keys, grammar_api_key):
        self.synonym_api = SynonymAPI(synonym_api_keys)
        self.grammar_api = GrammarAPI(grammar_api_key)

    def fetch_synonyms(self, word, language='en'):
        return self.synonym_api.fetch(word, language) if self.synonym_api else "Keine Synonym-API konfiguriert."

    def fetch_grammar(self, text, language='en'):
        return self.grammar_api.fetch(text, language) if self.grammar_api else "Keine Grammatik-API konfiguriert."

# Instanziierung des API-Managers
api_manager = APIManager()

# API-Konfiguration
@app.route('/configure', methods=['POST'])
def configure_apis():
    data = request.json
    api_keys = {
        'synonym_api_keys': {
            'primary': data.get('synonym_primary_api_key'),
            'secondary': data.get('synonym_secondary_api_key')
        },
        'grammar_api_key': data.get('grammar_api_key')
    }
    save_api_keys(api_keys)
    api_manager.configure_apis(api_keys['synonym_api_keys'], api_keys['grammar_api_key'])
    return jsonify({"status": "APIs erfolgreich konfiguriert."})

# Textanalyse-API mit Zeichenanpassung
@app.route('/analyze-text', methods=['POST'])
def analyze_text():
    data = request.json
    text = data.get('text')
    desired_length = data.get('desired_length', len(text))
    language = data.get('language', 'en')

    word = text.split()[0]
    synonyms = api_manager.fetch_synonyms(word, language)
    grammar = api_manager.fetch_grammar(text, language)

    current_length = len(text)
    length_difference = desired_length - current_length

    response = {
        "synonyms": synonyms,
        "grammar_suggestions": grammar,
        "current_length": current_length,
        "desired_length": desired_length,
        "length_difference": length_difference,
        "adjustment_suggestions": []
    }

    if length_difference > 0:
        response["adjustment_suggestions"].append(f"Fügen Sie {length_difference} Zeichen hinzu.")
    elif length_difference < 0:
        response["adjustment_suggestions"].append(f"Entfernen Sie {abs(length_difference)} Zeichen.")

    return jsonify(response)

# Serverstart
if __name__ == '__main__':
    app.run(debug=True)