import logging
logger = logging.getLogger(__name__)
logging.basicConfig(level=logging.INFO)

import gradio as gr
from gradio_calendar import Calendar
from gematria import calculate_gematria, strip_diacritics
from datetime import datetime, timedelta
import json
import inflect

# --- Hilfsfunktionen ---
def calculate_gematria_sum(text):
    """Berechnet die Gematria-Summe eines gegebenen Textes."""
    if text:
        text_gematria = calculate_gematria(strip_diacritics(text))
        return text_gematria
    else:
        return None

# Custom function to convert number to ordinal words
def number_to_ordinal_word(number):
    ordinal_dict = {
        1: "first", 2: "second", 3: "third", 4: "fourth", 5: "fifth",
        6: "sixth", 7: "seventh", 8: "eighth", 9: "ninth", 10: "tenth",
        11: "eleventh", 12: "twelfth", 13: "thirteenth", 14: "fourteenth",
        15: "fifteenth", 16: "sixteenth", 17: "seventeenth", 18: "eighteenth",
        19: "nineteenth", 20: "twentieth", 21: "twentyfirst", 22: "twentysecond",
        23: "twentythird", 24: "twentyfourth", 25: "twentyfifth",
        26: "twentysixth", 27: "twentyseventh", 28: "twentyeighth",
        29: "twentyninth", 30: "thirtieth", 31: "thirtyfirst"
    }
    return ordinal_dict.get(number, "")

def date_to_words(date_string):
    """Konvertiert ein Datum im Format YYYY-MM-DD in die englische Schreibweise."""
    inf_engine = inflect.engine()
    date_obj = datetime.strptime(date_string, "%Y-%m-%d")

    year = date_obj.year
    if 1900 <= year <= 1999:
        year_words = f"{inf_engine.number_to_words(year // 100, andword='') } hundred"
        if year % 100 != 0:
            year_words += f" {inf_engine.number_to_words(year % 100, andword='')}"
    else:
        year_words = inf_engine.number_to_words(year, andword='')
    year_formatted = year_words.replace(',', '')

    month = date_obj.strftime("%B")
    day = date_obj.day
    day_ordinal = number_to_ordinal_word(day)

    output_text = f"{day_ordinal} {month} {year_formatted}"
    return output_text

def perform_gematria_calculation_for_date_range(start_date, end_date):
    """Führt die Gematria-Berechnung für einen Datumsbereich durch."""
    logger.info(f"Startdatum: {start_date}, Enddatum: {end_date}")
    results = {}
    delta = timedelta(days=1)
    current_date = start_date

    while current_date <= end_date:
        # Datum in String umwandeln
        date_string = current_date.strftime("%Y-%m-%d")
        date_words = date_to_words(date_string)
        logger.info(f"Datum: {current_date}, Tagesname: {date_words}")
        gematria_sum = calculate_gematria_sum(date_words)
        logger.info(f"Gematria-Summe: {gematria_sum}")

        if gematria_sum not in results:
            results[gematria_sum] = []

        results[gematria_sum].append({
            "date": current_date.strftime('%Y-%m-%d'),
            "date_words": date_words
        })

        current_date += delta

    return results

def generate_json_output(results, start_date, end_date):
    """Generiert die JSON-Ausgabe mit dem Datumsbereich und den Ergebnissen."""
    result = {
        "DateRange": {
            "StartDate": start_date.strftime("%Y-%m-%d"),
            "EndDate": end_date.strftime("%Y-%m-%d")
        },
        "Results": results
    }
    return json.dumps(result, indent=4, ensure_ascii=False)

# --- Hauptanwendung mit Gradio ---
with gr.Blocks() as app:
    with gr.Row():
        start_date = Calendar(type="datetime", label="Startdatum")
        end_date = Calendar(type="datetime", label="Enddatum")

    calculate_btn = gr.Button("Gematria für Zeitraum berechnen")
    json_output = gr.Textbox(label="JSON-Ausgabe")

    # --- Event-Handler ---
    def perform_calculation(start_date, end_date):
        """Führt die Berechnung aus und generiert die JSON-Ausgabe."""
        logger.info(f"perform_calculation aufgerufen mit: start_date={start_date}, end_date={end_date}")
        results = perform_gematria_calculation_for_date_range(start_date, end_date)
        json_result = generate_json_output(results, start_date, end_date)
        return json_result

    # --- Event-Trigger ---
    calculate_btn.click(
        perform_calculation,
        inputs=[start_date, end_date],
        outputs=[json_output],
        api_name="calculate_gematria"
    )

if __name__ == "__main__":
    app.launch(share=False)