import pandas as pd
import streamlit as st

def login():
    st.title("🔑 Login Sistem")
    username = st.text_input("Username")
    password = st.text_input("Password", type="password")
    if st.button("Login"):
        if username == "admin" and password == "1234":
            st.session_state["login"] = True
            st.success("Login berhasil ✅")
        else:
            st.error("Username atau Password salah!")

def dashboard():
    st.title("📊 Dashboard Space Management - Sports & Health")

    # Data awal
    if "data" not in st.session_state:
        st.session_state["data"] = pd.DataFrame({
            "ID": [1, 2, 3],
            "Nama File": ["Laporan_A.xlsx", "Proposal_B.docx", "Data_C.csv"],
            "Status": ["Menunggu", "Menunggu", "Menunggu"]
        })

    # Sidebar menu
    st.sidebar.title("⚙️ Menu")
    if st.sidebar.button("🚪 Logout"):
        st.session_state["login"] = False
        st.experimental_rerun()

    # Upload file baru
    st.sidebar.header("📤 Upload File Baru")
    uploaded_file = st.sidebar.file_uploader("Upload Excel/CSV", type=["csv", "xlsx"])
    if uploaded_file:
        try:
            if uploaded_file.name.endswith(".csv"):
                df_new = pd.read_csv(uploaded_file)
            else:
                df_new = pd.read_excel(uploaded_file)
            st.session_state["data"] = df_new
            st.success("File berhasil diupload dan ditampilkan!")
        except Exception as e:
            st.error(f"Gagal membaca file: {e}")

    # Tabel data
    st.subheader("📂 Master Data")
    st.dataframe(st.session_state["data"])

    # Update status
    pilihan = st.selectbox("Pilih File untuk Approve/Tolak",
                           st.session_state["data"]["Nama File"])
    aksi = st.radio("Aksi", ["Setujui", "Tolak"])

    if st.button("Update Status"):
        idx = st.session_state["data"].index[
            st.session_state["data"]["Nama File"] == pilihan
        ][0]
        st.session_state["data"].at[idx, "Status"] = aksi
        st.success(f"File '{pilihan}' berhasil diupdate menjadi {aksi}")

    # Ringkasan data
    st.subheader("📊 Ringkasan")
    summary = st.session_state["data"]["Status"].value_counts()
    st.bar_chart(summary)

    # Download data
    st.sidebar.header("📥 Download Data")
    csv = st.session_state["data"].to_csv(index=False).encode("utf-8")
    st.sidebar.download_button(
        label="Download CSV",
        data=csv,
        file_name="master_data.csv",
        mime="text/csv"
    )

# --- Main ---
if "login" not in st.session_state:
    st.session_state["login"] = False

if st.session_state["login"]:
    dashboard()
else:
    login()