// Csak a név=érték részt tartjuk meg a cookie stringből
function extractCookie(cookieStr: string) {
  return cookieStr.split(';')[0];
}
import { Ionicons, MaterialCommunityIcons, MaterialIcons } from '@expo/vector-icons';
import axios from 'axios';
import { addDays, addMonths, endOfMonth, endOfWeek, format, getMonth, getYear, isSameDay, startOfMonth, startOfWeek, subMonths } from 'date-fns';
import { useRouter } from 'expo-router';
import * as SecureStore from 'expo-secure-store';
import React, { useEffect, useState } from "react";
import { ScrollView, StyleSheet, Text, TouchableOpacity, View } from "react-native";

const PRIMARY = '#A24BFA';
const BG = '#0c0a0a';

export default function Schedule() {
  const [currentMonth, setCurrentMonth] = useState(new Date());
  const [workdays, setWorkdays] = useState<any[]>([]);
  const [loading, setLoading] = useState(false);
  const router = useRouter();

  useEffect(() => {
    fetchWorkdays();
  }, [currentMonth]);

  async function fetchWorkdays() {
    setLoading(true);
    try {
      const userCookie = await SecureStore.getItemAsync('cookie');
      const year = getYear(currentMonth);
      const month = getMonth(currentMonth) + 1;
      console.log('Lekérdezett hónap:', year, month);
      console.log('Cookie:', userCookie);
      if (!userCookie) {
        console.log('Nincs elmentett cookie, nem vagy bejelentkezve!');
        setWorkdays([]);
        return;
      }
      const response = await axios.post(
        'https://mymenu.mcdonalds.hu/api/UserDataApi/GetWorkDayMonthList',
        { Data: { Year: year, Month: month } },
        {
          headers: {
            'Content-Type': 'application/json',
            'cookie': userCookie,
            'origin': 'https://mymenu.mcdonalds.hu',
          },
          // Axios v1: get full response
          withCredentials: true,
        }
      );
      // Cookie frissítés, ha van új set-cookie header
      const setCookieHeader = response.headers && (response.headers['set-cookie'] || response.headers['Set-Cookie']);
      if (setCookieHeader) {
        let cookieString = '';
        if (Array.isArray(setCookieHeader)) {
          // Ha van .ASPXAUTH, azt mentsük el, különben az elsőt
          const authCookie = setCookieHeader.find(c => c.startsWith('.ASPXAUTH='));
          if (authCookie) {
            cookieString = extractCookie(authCookie);
          } else {
            cookieString = extractCookie(setCookieHeader[0]);
          }
        } else {
          cookieString = extractCookie(setCookieHeader);
        }
        console.log('Frissített cookie:', cookieString);
        await SecureStore.setItemAsync('cookie', cookieString);
      }
      console.log('API teljes válasz:', response.data);
      if (!response.data || !response.data.data || !response.data.data.Data) {
        console.log('Nincs beosztás adat a válaszban!');
        setWorkdays([]);
        return;
      }
      setWorkdays(response.data.data.Data);
    } catch (e) {
      console.log('Beosztás API hiba:', e);
      setWorkdays([]);
    } finally {
      setLoading(false);
    }
  }

  function renderCalendar() {
    const monthStart = startOfMonth(currentMonth);
    const monthEnd = endOfMonth(monthStart);
    const startDate = startOfWeek(monthStart, { weekStartsOn: 1 });
    const endDate = endOfWeek(monthEnd, { weekStartsOn: 1 });
    const today = new Date();
    const rows = [];
    let days = [];
    let day = startDate;
    let formattedDate = '';
    while (day <= endDate) {
      for (let i = 0; i < 7; i++) {
        formattedDate = format(day, 'yyyy-MM-dd');
        const wd = workdays.find(w => w.WorkDay?.slice(0, 10) === formattedDate);
        let bg = 'rgba(24,20,28,0.7)';
        let color = '#fff';
        let borderWidth = 0;
        if (isSameDay(day, today)) {
          borderWidth = 2;
          color = PRIMARY;
        }
        if (wd) {
          bg = wd.color || 'deepskyblue';
          color = '#222';
        }
        days.push(
          <View key={day.toString()} style={{ flex: 1, aspectRatio: 1, margin: 2 }}>
            <View style={{
              backgroundColor: bg,
              borderRadius: 8,
              borderWidth,
              borderColor: PRIMARY,
              justifyContent: 'center',
              alignItems: 'center',
              flex: 1,
            }}>
              <Text style={{ color, fontWeight: isSameDay(day, today) ? 'bold' : 'normal' }}>{format(day, 'd')}</Text>
              {wd && <Text style={{ color, fontSize: 10 }}>{wd.text}</Text>}
            </View>
          </View>
        );
        day = addDays(day, 1);
      }
      rows.push(<View key={day.toString()} style={{ flexDirection: 'row' }}>{days}</View>);
      days = [];
    }
    return (
      <View>
        <View style={{ flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', marginBottom: 12 }}>
          <TouchableOpacity onPress={() => setCurrentMonth(subMonths(currentMonth, 1))}><Ionicons name="chevron-back" size={28} color="#fff" /></TouchableOpacity>
          <Text style={{ color: '#fff', fontSize: 18, fontWeight: 'bold' }}>{format(currentMonth, 'yyyy. MMMM')}</Text>
          <TouchableOpacity onPress={() => setCurrentMonth(addMonths(currentMonth, 1))}><Ionicons name="chevron-forward" size={28} color="#fff" /></TouchableOpacity>
        </View>
        <View style={{ flexDirection: 'row', marginBottom: 4 }}>
          {["H", "K", "Sz", "Cs", "P", "Szo", "V"].map(d => (
            <Text key={d} style={{ flex: 1, color: '#bdbdbd', textAlign: 'center', fontWeight: 'bold' }}>{d}</Text>
          ))}
        </View>
        {loading ? (
          <Text style={{ color: '#fff', textAlign: 'center', marginTop: 24 }}>Betöltés…</Text>
        ) : (
          <View>{rows}</View>
        )}
      </View>
    );
  }

  return (
    <ScrollView style={{ flex: 1, backgroundColor: BG }} contentContainerStyle={{ flexGrow: 1, justifyContent: 'center', alignItems: 'center', minHeight: '100%', paddingBottom: 80 }}>
      <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center', width: '100%' }}>
        <View style={[styles.card, { alignSelf: 'center', marginTop: 48, marginBottom: 48 }]}> 
          <Text style={styles.label}>Beosztás naptár</Text>
          {/* Hibaüzenet, ha nincs bejelentkezve vagy nincs beosztás */}
          {(!loading && workdays.length === 0) && (
            <Text style={{ color: '#ff5252', textAlign: 'center', marginBottom: 12, fontWeight: 'bold' }}>
              Nincs beosztás vagy nem vagy bejelentkezve!
            </Text>
          )}
          {renderCalendar()}
        </View>
      </View>
      <View style={styles.navBar}>
        <NavBar activeTab="schedule" />
      </View>
    </ScrollView>
  );
}

function NavBar({ activeTab }: { activeTab: string }) {
  const router = useRouter();
  return (
    <View style={styles.navBar}>
      <TouchableOpacity style={styles.navItem} onPress={() => router.push('/profile')}>
        <MaterialIcons name="person" size={28} color={activeTab === 'profile' ? PRIMARY : '#bdbdbd'} />
        <Text style={[styles.navLabel, { color: activeTab === 'profile' ? PRIMARY : '#bdbdbd' }]}>Profilom</Text>
      </TouchableOpacity>
      <TouchableOpacity style={styles.navItem} onPress={() => router.push('/schedule')}>
        <MaterialCommunityIcons name="calendar-month" size={28} color={activeTab === 'schedule' ? PRIMARY : '#bdbdbd'} />
        <Text style={[styles.navLabel, { color: activeTab === 'schedule' ? PRIMARY : '#bdbdbd' }]}>Beosztás</Text>
      </TouchableOpacity>
      <TouchableOpacity style={styles.navItem} onPress={() => router.push('/requests')}>
        <Ionicons name="mail" size={28} color={activeTab === 'requests' ? PRIMARY : '#bdbdbd'} />
        <Text style={[styles.navLabel, { color: activeTab === 'requests' ? PRIMARY : '#bdbdbd' }]}>Kérelmek</Text>
      </TouchableOpacity>
    </View>
  );
}

const styles = StyleSheet.create({
  card: {
    backgroundColor: 'rgba(24, 20, 28, 0.95)',
    borderRadius: 24,
    padding: 32,
    width: '90%',
    maxWidth: 400,
    shadowColor: '#000',
    shadowOpacity: 0.3,
    shadowRadius: 24,
    shadowOffset: { width: 0, height: 8 },
    elevation: 8,
    marginBottom: 32,
    marginTop: 32,
  },
  label: {
    color: '#bdbdbd',
    fontSize: 16,
    marginBottom: 16,
    fontWeight: 'bold',
    textAlign: 'center',
  },
  navBar: {
    flexDirection: 'row',
    justifyContent: 'space-around',
    alignItems: 'center',
    backgroundColor: 'rgba(24, 20, 28, 0.98)',
    borderTopWidth: 1,
    borderTopColor: '#222',
    position: 'absolute',
    bottom: 0,
    left: 0,
    right: 0,
    height: 64,
    paddingHorizontal: 16,
  },
  navItem: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
  navLabel: {
    fontSize: 13,
    marginTop: 2,
    fontWeight: 'bold',
  },
});