import streamlit as st
import requests
import os

BACKEND_URL = os.environ.get("BACKEND_URL", "http://localhost:8000")

st.set_page_config(page_title="Notes", page_icon="📝")
st.title("📝 Notes")

# Add note
with st.form("add_note", clear_on_submit=True):
    st.subheader("New Note")
    title = st.text_input("Title")
    content = st.text_area("Content", height=100)
    submitted = st.form_submit_button("Add Note", use_container_width=True)

    if submitted:
        if not title.strip():
            st.error("Title is required.")
        else:
            try:
                r = requests.post(
                    f"{BACKEND_URL}/notes",
                    json={"title": title, "content": content},
                    timeout=5,
                )
                if r.status_code == 200:
                    st.success("Note added!")
                    st.rerun()
                else:
                    st.error(f"Backend error: {r.text}")
            except Exception as e:
                st.error(f"Could not reach backend: {e}")

st.divider()
st.subheader("All Notes")

try:
    r = requests.get(f"{BACKEND_URL}/notes", timeout=5)
    notes = r.json()

    if not notes:
        st.info("No notes yet. Add one above.")
    else:
        for note in notes:
            with st.container(border=True):
                col1, col2 = st.columns([5, 1])
                with col1:
                    st.markdown(f"**{note['title']}**")
                    if note.get("content"):
                        st.write(note["content"])
                    st.caption(note["created_at"])
                with col2:
                    if st.button("Delete", key=f"del_{note['id']}"):
                        requests.delete(f"{BACKEND_URL}/notes/{note['id']}", timeout=5)
                        st.rerun()
except Exception as e:
    st.error(f"Could not reach backend: {e}")