import requests
import streamlit as st

from auth import require_auth
from nightscout_client import NightscoutConfigError
from pdf_export import AVAILABLE_SECTIONS, SECTION_EVENTS, build_report_pdf
from reporting import HIGH, LOW, VERY_HIGH, VERY_LOW, detect_events, summarize_events
from ui_common import (
    load_profile,
    load_range_data,
    render_completeness_warning,
    select_period_days,
)

st.set_page_config(page_title="Glucose dashboard — Export", page_icon="📊", layout="wide")
require_auth()

st.title("Export")
st.caption("Stel een PDF-rapport samen om naar het diabetesteam te sturen (FR10).")

start, end, days = select_period_days(default_label="90 dagen")
sections = st.multiselect("Onderdelen", AVAILABLE_SECTIONS, default=AVAILABLE_SECTIONS)

try:
    glucose, treatments = load_range_data(start, end)
    profile = load_profile()
except NightscoutConfigError as exc:
    st.error(str(exc))
    st.stop()
except (requests.RequestException, ValueError) as exc:
    st.error(f"Kon geen data ophalen van Nightscout: {exc}")
    st.stop()

if glucose.empty:
    st.info("Geen glucosemetingen gevonden in deze periode.")
    st.stop()

render_completeness_warning(glucose, start, end)

events_summary = {}
if SECTION_EVENTS in sections:
    levels = {
        f"Hypo Level 1 (<{LOW})": (LOW, "below"),
        f"Hypo Level 2 (<{VERY_LOW})": (VERY_LOW, "below"),
        f"Hyper Level 1 (>{HIGH})": (HIGH, "above"),
        f"Hyper Level 2 (>{VERY_HIGH})": (VERY_HIGH, "above"),
    }
    for label, (threshold, direction) in levels.items():
        events = detect_events(glucose, threshold, direction)
        events_summary[label] = summarize_events(events, days)

pdf_bytes = build_report_pdf(sections, glucose, events_summary, start, end, treatments=treatments, profile=profile)

st.download_button(
    "Download PDF",
    data=pdf_bytes,
    file_name=f"glucoserapport_{start.strftime('%Y%m%d')}_{end.strftime('%Y%m%d')}.pdf",
    mime="application/pdf",
)
st.caption(f"Periode: {start.strftime('%d-%m-%Y')} t/m {end.strftime('%d-%m-%Y')}")