path = "src/screens/GroupSettingsScreen.js"
with open(path, "r", encoding="utf-8") as f:
    src = f.read()

edits = []

# 1. imports
edits.append((
'''import { View, Text, TouchableOpacity, StyleSheet, ScrollView, Switch, Alert, ActivityIndicator, Modal, Share } from 'react-native';
import { BlurView } from 'expo-blur';
import { useRoute, useNavigation } from '@react-navigation/native';
import { ChevronLeft, BadgeCheck, X } from 'lucide-react-native';''',
'''import { View, Text, TouchableOpacity, StyleSheet, ScrollView, Switch, Alert, ActivityIndicator, Modal, Share, FlatList, TextInput } from 'react-native';
import { BlurView } from 'expo-blur';
import { useRoute, useNavigation } from '@react-navigation/native';
import { ChevronLeft, BadgeCheck, X, UserPlus, Check } from 'lucide-react-native';'''
))

# 2. state
edits.append((
'''  const [inviteVisible, setInviteVisible] = useState(false);
  const [inviteCode, setInviteCode] = useState(null);''',
'''  const [inviteVisible, setInviteVisible] = useState(false);
  const [inviteCode, setInviteCode] = useState(null);
  const [addFriendsVisible, setAddFriendsVisible] = useState(false);
  const [friends, setFriends] = useState([]);
  const [friendSearch, setFriendSearch] = useState('');
  const [selectedFriendIds, setSelectedFriendIds] = useState([]);
  const [addingMembers, setAddingMembers] = useState(false);'''
))

# 3. showAddFriendsRow flag
edits.append((
'''  function guardGroupId() {''',
'''  const showAddFriendsRow = canManage || editPerm === 'all';

  function guardGroupId() {'''
))

# 4. handler functions
edits.append((
'''  function confirmClearHistory() {''',
'''  async function openAddFriends() {
    if (!guardGroupId()) return;
    setFriendSearch('');
    setSelectedFriendIds([]);
    setAddFriendsVisible(true);
    try {
      const res = await apiRequest('/friends/list');
      const memberIds = members.map(m => String(m.id));
      const list = (res?.friends || [])
        .filter(f => !memberIds.includes(String(f.id)))
        .map(f => ({ id: f.id, username: f.username || f.handle || 'Friend', verified: f.verified }));
      setFriends(list);
    } catch (e) {
      Alert.alert('Error', e.message || "Couldn't load your friends list.");
    }
  }

  function toggleFriendSelect(id) {
    setSelectedFriendIds(prev => prev.includes(id) ? prev.filter(x => x !== id) : [...prev, id]);
  }

  async function submitAddFriends() {
    if (!selectedFriendIds.length) return;
    setAddingMembers(true);
    try {
      await apiRequest(`/groups/${groupId}/members`, {
        method: 'POST',
        body: JSON.stringify({ member_ids: selectedFriendIds }),
      });
      setAddFriendsVisible(false);
      await load();
    } catch (e) {
      Alert.alert('Error', e.message || "Couldn't add those friends to the group.");
    } finally {
      setAddingMembers(false);
    }
  }

  function confirmClearHistory() {'''
))

# 5. member row border fix
edits.append((
'''              <View key={m.id} style={[styles.row, i < members.length - 1 && styles.rowBorder]}>''',
'''              <View key={m.id} style={[styles.row, (i < members.length - 1 || showAddFriendsRow) && styles.rowBorder]}>'''
))

# 6. Add Friends row in Members card
edits.append((
'''            ))}
          </GlassCard>

          <Text style={styles.sectionTitle}>Permissions</Text>''',
'''            ))}
            {showAddFriendsRow && (
              <TouchableOpacity
                style={styles.row}
                onPress={openAddFriends}
              >
                <View style={styles.addFriendIconWrap}>
                  <UserPlus size={16} color="#4f46e5" />
                </View>
                <Text style={styles.addFriendLabel}>Add Friends</Text>
              </TouchableOpacity>
            )}
          </GlassCard>

          <Text style={styles.sectionTitle}>Permissions</Text>'''
))

# 7. modal
edits.append((
'''          </GlassCard>
        </View>
      </Modal>
    </ScrollView>
  );
}''',
'''          </GlassCard>
        </View>
      </Modal>

      <Modal visible={addFriendsVisible} transparent animationType="fade" onRequestClose={() => setAddFriendsVisible(false)}>
        <View style={styles.modalBackdrop}>
          <GlassCard style={styles.addFriendsCard} blurAmount={24} tint={0.55}>
            <TouchableOpacity style={styles.closeBtn} onPress={() => setAddFriendsVisible(false)}>
              <X size={20} color="#0f0f1a" />
            </TouchableOpacity>
            <Text style={styles.inviteTitle}>Add friends to {group.name || 'group'}</Text>
            <TextInput
              style={styles.friendSearchInput}
              placeholder="Search friends..."
              placeholderTextColor="#9b9ba8"
              value={friendSearch}
              onChangeText={setFriendSearch}
            />
            <FlatList
              style={styles.friendList}
              data={friends.filter(f => f.username.toLowerCase().includes(friendSearch.toLowerCase()))}
              keyExtractor={f => String(f.id)}
              ListEmptyComponent={<Text style={styles.friendEmptyText}>No friends to add.</Text>}
              renderItem={({ item }) => {
                const isSelected = selectedFriendIds.includes(item.id);
                return (
                  <TouchableOpacity style={styles.friendRow} onPress={() => toggleFriendSelect(item.id)}>
                    <View style={[styles.memberDot, { backgroundColor: colorForId(item.id) }]}>
                      <Text style={styles.memberDotText}>{item.username?.[0]?.toUpperCase()}</Text>
                    </View>
                    <View style={{ flex: 1, flexDirection: 'row', alignItems: 'center', gap: 4 }}>
                      <Text style={styles.memberName}>{item.username}</Text>
                      {item.verified && <BadgeCheck size={14} color={item.verified === 'cyan' ? '#0ea5e9' : '#9333ea'} />}
                    </View>
                    <View style={[styles.checkCircle, isSelected && styles.checkCircleSelected]}>
                      {isSelected && <Check size={14} color="white" />}
                    </View>
                  </TouchableOpacity>
                );
              }}
            />
            <TouchableOpacity
              style={[styles.shareBtn, !selectedFriendIds.length && styles.shareBtnDisabled]}
              onPress={submitAddFriends}
              disabled={!selectedFriendIds.length || addingMembers}
            >
              {addingMembers ? (
                <ActivityIndicator color="white" />
              ) : (
                <Text style={styles.shareBtnText}>
                  Add{selectedFriendIds.length ? ` (${selectedFriendIds.length})` : ''}
                </Text>
              )}
            </TouchableOpacity>
          </GlassCard>
        </View>
      </Modal>
    </ScrollView>
  );
}'''
))

# 8. styles
edits.append((
'''  shareBtn: { marginTop: 12, backgroundColor: '#4f46e5', paddingVertical: 12, paddingHorizontal: 24, borderRadius: 14 },
  shareBtnText: { color: 'white', fontWeight: '700', fontSize: 14 },
});''',
'''  shareBtn: { marginTop: 12, backgroundColor: '#4f46e5', paddingVertical: 12, paddingHorizontal: 24, borderRadius: 14, alignItems: 'center', justifyContent: 'center', minWidth: 120 },
  shareBtnDisabled: { backgroundColor: '#c4c4cc' },
  shareBtnText: { color: 'white', fontWeight: '700', fontSize: 14 },
  addFriendIconWrap: { width: 32, height: 32, borderRadius: 16, alignItems: 'center', justifyContent: 'center', marginRight: 10, backgroundColor: 'rgba(79,70,229,0.12)' },
  addFriendLabel: { fontWeight: '600', color: '#4f46e5' },
  addFriendsCard: { width: '100%', maxHeight: '75%', padding: 24, gap: 10 },
  friendSearchInput: { backgroundColor: 'rgba(255,255,255,0.6)', borderRadius: 12, paddingHorizontal: 14, paddingVertical: 10, fontSize: 14, color: '#0f0f1a', marginTop: 4 },
  friendList: { maxHeight: 280, marginVertical: 6 },
  friendRow: { flexDirection: 'row', alignItems: 'center', paddingVertical: 10 },
  friendEmptyText: { textAlign: 'center', color: '#6b6b7a', fontSize: 13, paddingVertical: 20 },
  checkCircle: { width: 22, height: 22, borderRadius: 11, borderWidth: 1.5, borderColor: '#c4c4cc', alignItems: 'center', justifyContent: 'center' },
  checkCircleSelected: { backgroundColor: '#4f46e5', borderColor: '#4f46e5' },
});'''
))

for i, (old, new) in enumerate(edits, 1):
    if src.count(old) != 1:
        raise SystemExit(f"PATCH FAILED at edit {i}/8: marker not found exactly once (file may already be patched or changed).")
    src = src.replace(old, new, 1)

with open(path, "w", encoding="utf-8") as f:
    f.write(src)

print("✅ GroupSettingsScreen.js patched: Add Friends row + picker modal wired to /friends/list and /groups/{id}/members.")