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import streamlit as st
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns
from scipy.stats import norm, skew
import platform
import os
import matplotlib.font_manager as fm  # [์ˆ˜์ • 1] ๋ˆ„๋ฝ๋˜์—ˆ๋˜ ํฐํŠธ ๊ด€๋ฆฌ์ž ๋ชจ๋“ˆ import

# --- ํ•œ๊ธ€ ํฐํŠธ ์„ค์ • ํ•จ์ˆ˜ ---
def set_korean_font():
    """
    Hugging Face Space์— ํฌํ•จ๋œ ํฐํŠธ ํŒŒ์ผ์„ ์ง์ ‘ ์ง€์ •ํ•˜์—ฌ ๋กœ๋“œํ•ฉ๋‹ˆ๋‹ค.
    """
    font_path = 'NanumGaRamYeonGgoc.ttf' # ์Šคํฌ๋ฆฐ์ƒท ๊ธฐ์ค€ ํŒŒ์ผ ์ด๋ฆ„

    if os.path.exists(font_path):
        font_prop = fm.FontProperties(fname=font_path)
        plt.rc('font', family=font_prop.get_name())
        try:
            # st.sidebar๊ฐ€ ๋จผ์ € ๋ Œ๋”๋ง๋˜๋ฏ€๋กœ, ์—ฌ๊ธฐ์— ๋ฉ”์‹œ์ง€๋ฅผ ํ‘œ์‹œํ•˜๋Š” ๊ฒƒ์ด ์•ˆ์ •์ ์ž…๋‹ˆ๋‹ค.
            st.sidebar.success(f"'{font_prop.get_name()}' ํฐํŠธ ๋กœ๋”ฉ ์„ฑ๊ณต!")
        except Exception:
            pass
    else:
        try:
            st.sidebar.warning(f"ํฐํŠธ ํŒŒ์ผ์„ ์ฐพ์„ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค: '{font_path}'. ํ•œ๊ธ€์ด ๊นจ์ ธ ๋ณด์ผ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.")
        except Exception:
            pass
    
    plt.rcParams['axes.unicode_minus'] = False

# --- ์ ์ˆ˜ ๋ถ„์„ ํ•จ์ˆ˜ ---
def analyze_scores(df):
    """๋ฐ์ดํ„ฐํ”„๋ ˆ์ž„์„ ๋ฐ›์•„ ๋ถ„์„ ๊ฒฐ๊ณผ๋ฅผ ํ‘œ์‹œํ•˜๋Š” ํ•จ์ˆ˜"""
    st.subheader("๋ฐ์ดํ„ฐ ๋ฏธ๋ฆฌ๋ณด๊ธฐ (์ƒ์œ„ 5๊ฐœ)")
    st.dataframe(df.head())

    # ์ˆซ์ž ํ˜•์‹์˜ ์—ด๋งŒ ์„ ํƒ์ง€๋กœ ์ œ๊ณตํ•˜์—ฌ ์˜ค๋ฅ˜ ๋ฐฉ์ง€
    numeric_columns = df.select_dtypes(include=np.number).columns.tolist()
    if not numeric_columns:
        st.error("๋ฐ์ดํ„ฐ์—์„œ ๋ถ„์„ ๊ฐ€๋Šฅํ•œ ์ˆซ์ž ํ˜•์‹์˜ ์—ด์„ ์ฐพ์„ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.")
        return

    score_column = st.selectbox("๋ถ„์„ํ•  ์ ์ˆ˜ ์—ด(column)์„ ์„ ํƒํ•˜์„ธ์š”:", numeric_columns)

    if score_column:
        scores = df[score_column].dropna()
        st.subheader(f"'{score_column}' ์ ์ˆ˜ ๋ถ„ํฌ ๋ถ„์„ ๊ฒฐ๊ณผ")

        # 1. ๊ธฐ์ˆ  ํ†ต๊ณ„๋Ÿ‰
        st.write("#### ๐Ÿ“ˆ ๊ธฐ์ˆ  ํ†ต๊ณ„๋Ÿ‰")
        st.table(scores.describe())

        # 2. ๋ถ„ํฌ ์‹œ๊ฐํ™”
        st.write("#### ๐ŸŽจ ์ ์ˆ˜ ๋ถ„ํฌ ์‹œ๊ฐํ™”")
        fig, ax = plt.subplots(figsize=(10, 6))
        sns.histplot(scores, kde=True, stat='density', label='ํ•™์ƒ ์ ์ˆ˜ ๋ถ„ํฌ', ax=ax)
        mu, std = norm.fit(scores)
        xmin, xmax = plt.xlim()
        x = np.linspace(xmin, xmax, 100)
        p = norm.pdf(x, mu, std)
        ax.plot(x, p, 'k', linewidth=2, label='์ •๊ทœ๋ถ„ํฌ ๊ณก์„ ')
        ax.set_title(f"'{score_column}' ์ ์ˆ˜ ๋ถ„ํฌ (ํ‰๊ท : {mu:.2f}, ํ‘œ์ค€ํŽธ์ฐจ: {std:.2f})")
        ax.set_xlabel('์ ์ˆ˜'); ax.set_ylabel('๋ฐ€๋„'); ax.legend()
        st.pyplot(fig)

        # 3. ์™œ๋„(Skewness) ๋ถ„์„
        st.write("#### ๐Ÿ“ ์™œ๋„ (Skewness) ๋ถ„์„")
        skewness = skew(scores)
        st.metric(label="์™œ๋„ (Skewness)", value=f"{skewness:.4f}")

        if skewness > 0.5:
            st.info("๊ผฌ๋ฆฌ๊ฐ€ ์˜ค๋ฅธ์ชฝ์œผ๋กœ ๊ธด ๋ถ„ํฌ (Positive Skew): ๋Œ€๋ถ€๋ถ„์˜ ํ•™์ƒ๋“ค์ด ํ‰๊ท ๋ณด๋‹ค ๋‚ฎ์€ ์ ์ˆ˜์— ๋ชฐ๋ ค์žˆ๊ณ , ์ผ๋ถ€ ๊ณ ๋“์ ์ž๋“ค์ด ํ‰๊ท ์„ ๋†’์ด๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.")
        elif skewness < -0.5:
            st.info("๊ผฌ๋ฆฌ๊ฐ€ ์™ผ์ชฝ์œผ๋กœ ๊ธด ๋ถ„ํฌ (Negative Skew): ๋Œ€๋ถ€๋ถ„์˜ ํ•™์ƒ๋“ค์ด ํ‰๊ท ๋ณด๋‹ค ๋†’์€ ์ ์ˆ˜์— ๋ชฐ๋ ค์žˆ๊ณ , ์ผ๋ถ€ ์ €๋“์ ์ž๋“ค์ด ํ‰๊ท ์„ ๋‚ฎ์ถ”๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.")
        else:
            st.info("๋Œ€์นญ์— ๊ฐ€๊นŒ์šด ๋ถ„ํฌ: ์ ์ˆ˜๊ฐ€ ํ‰๊ท ์„ ์ค‘์‹ฌ์œผ๋กœ ๋น„๊ต์  ๊ณ ๋ฅด๊ฒŒ ๋ถ„ํฌ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค.")

# --- ๋ฉ”์ธ ์‹คํ–‰ ํ•จ์ˆ˜ ---
def main():
    st.set_page_config(layout="wide") # ํŽ˜์ด์ง€ ๋ ˆ์ด์•„์›ƒ์„ ๋„“๊ฒŒ ์„ค์ •
    set_korean_font() # ์•ฑ ์‹œ์ž‘ ์‹œ ํฐํŠธ ์„ค์ • ๋จผ์ € ์‹คํ–‰
    
    st.title("ํ•™์ƒ ์ ์ˆ˜ ๋ถ„ํฌ ๋ถ„์„ ๋„๊ตฌ ๐Ÿ“Š")
    st.write("CSV ํŒŒ์ผ์„ ์ง์ ‘ ์—…๋กœ๋“œํ•˜๊ฑฐ๋‚˜ Google Sheets URL์„ ๋ถ™์—ฌ๋„ฃ์–ด ํ•™์ƒ ์ ์ˆ˜ ๋ถ„ํฌ๋ฅผ ๋ถ„์„ํ•ฉ๋‹ˆ๋‹ค.")
    st.write("---")

    st.sidebar.title("๋ฐ์ดํ„ฐ ๊ฐ€์ ธ์˜ค๊ธฐ")
    source_option = st.sidebar.radio("๋ฐ์ดํ„ฐ ์†Œ์Šค๋ฅผ ์„ ํƒํ•˜์„ธ์š”:", ("Google Sheets URL", "CSV ํŒŒ์ผ ์—…๋กœ๋“œ"))
    
    df = None

    if source_option == "Google Sheets URL":
        sample_url = "https://docs.google.com/spreadsheets/d/e/2PACX-1vQ2Z8kzJq2sM7w2_9gXo-jZ-mO5o-BvC-w5p2nJ6oJ7oJ9xL-w3kZ9j5Z3kX7vN1aQ4mB1cW8jB7fR/pub?gid=0&single=true&output=csv"
        url = st.sidebar.text_input("์›น์— ๊ฒŒ์‹œ๋œ Google Sheets CSV URL", value=sample_url)
        if url:
            try:
                df = pd.read_csv(url)
            except Exception as e:
                st.error(f"URL๋กœ๋ถ€ํ„ฐ ๋ฐ์ดํ„ฐ๋ฅผ ์ฝ๋Š” ์ค‘ ์˜ค๋ฅ˜๊ฐ€ ๋ฐœ์ƒํ–ˆ์Šต๋‹ˆ๋‹ค: {e}")
                st.warning("์˜ฌ๋ฐ”๋ฅธ Google Sheets '์›น ๊ฒŒ์‹œ' CSV URL์ธ์ง€ ํ™•์ธํ•ด์ฃผ์„ธ์š”.")

    # [์ˆ˜์ • 2] elif์˜ ๋“ค์—ฌ์“ฐ๊ธฐ๋ฅผ ์ˆ˜์ •ํ•˜์—ฌ if์™€ ๊ฐ™์€ ๋ ˆ๋ฒจ๋กœ ๋งž์ถค
    elif source_option == "CSV ํŒŒ์ผ ์—…๋กœ๋“œ":
        uploaded_file = st.sidebar.file_uploader("CSV ํŒŒ์ผ์„ ์—…๋กœ๋“œํ•˜์„ธ์š”.", type="csv")
        if uploaded_file:
            try:
                df = pd.read_csv(uploaded_file, encoding='utf-8-sig')
            except Exception as e:
                st.error(f"ํŒŒ์ผ์„ ์ฝ๋Š” ์ค‘ ์˜ค๋ฅ˜๊ฐ€ ๋ฐœ์ƒํ–ˆ์Šต๋‹ˆ๋‹ค: {e}")

    # ๋ฐ์ดํ„ฐ๊ฐ€ ์„ฑ๊ณต์ ์œผ๋กœ ๋กœ๋“œ๋œ ๊ฒฝ์šฐ์—๋งŒ ๋ถ„์„ ํ•จ์ˆ˜ ์‹คํ–‰
    if df is not None:
        analyze_scores(df)
    else:
        st.info("์‚ฌ์ด๋“œ๋ฐ”์—์„œ ๋ฐ์ดํ„ฐ ์†Œ์Šค๋ฅผ ์„ ํƒํ•˜๊ณ  ๋ฐ์ดํ„ฐ๋ฅผ ๋ถˆ๋Ÿฌ์™€์ฃผ์„ธ์š”.")

if __name__ == '__main__':
    main()