#include "calendar_detail_screen.h"
#include "../../include/text_utils.h"
#include <M5Stack.h>
#include "../../include/theme.h"
#include "../icons/icons.h"
#include "../api/calendar_api.h"

namespace {
    CalendarData lastCalendar;
    bool ok = false;

    String formatEventTime(const CalendarEvent &ev) {
        if (ev.allDay) {
            int tIdx = ev.startAt.indexOf('T');
            return tIdx > 0 ? ev.startAt.substring(0, tIdx) : ev.startAt;
        } else {
            int tIdx = ev.startAt.indexOf('T');
            if (tIdx > 0 && ev.startAt.length() >= tIdx + 6) {
                return ev.startAt.substring(tIdx + 1, tIdx + 6);
            }
            return ev.startAt;
        }
    }
}

void renderCalendarDetailScreen(bool forceRefresh) {
    if (forceRefresh || !ok) {
        CalendarData c = fetchCalendar();
        ok = c.valid;
        if (c.valid) lastCalendar = c;
    }

    M5.Lcd.fillScreen(Theme::BG);
    M5.Lcd.setTextColor(Theme::TEXT, Theme::BG);
    M5.Lcd.setTextSize(2);
    M5.Lcd.setCursor(10, 10);
    M5.Lcd.print("Alle Termine");

    if (!ok) {
        Icons::drawRetryIcon(30, 60, 12);
        M5.Lcd.setTextColor(Theme::TEXT_DIM, Theme::BG);
        M5.Lcd.setCursor(50, 55);
        M5.Lcd.print("Keine Verbindung");
        return;
    }

    int y = 40;
    for (const auto &ev : lastCalendar.events) {
        if (y > 215) break;

        M5.Lcd.setTextColor(Theme::TEXT, Theme::BG);
        M5.Lcd.setTextSize(1);
        M5.Lcd.setCursor(10, y);
        M5.Lcd.print(sanitizeGermanText(ev.summary.substring(0, 28)));

        M5.Lcd.setTextColor(Theme::TEXT_DIM, Theme::BG);
        M5.Lcd.setCursor(230, y);
        M5.Lcd.print(formatEventTime(ev));

        y += 18;
    }

    M5.Lcd.setTextColor(Theme::TEXT_DIM, Theme::BG);
    M5.Lcd.setCursor(10, 228);
    M5.Lcd.print("A:Wetter  B:Home  C:MVG");
}