/**
 * AttachmentMenu — bottom-sheet с вариантами прикрепления.
 *
 * Выводится при нажатии на `+` в composer'е. Опции:
 *   - 📷 Photo / video из галереи (expo-image-picker)
 *   - 📸 Take photo (камера)
 *   - 📎 File (expo-document-picker)
 *   - 🎙️ Voice message — stub (запись через expo-av потребует
 *        permissions runtime + recording UI; сейчас добавляет мок-
 *        голосовое с duration 4s)
 *
 * Всё визуально — тёмный overlay + sheet снизу. Закрытие по tap'у на
 * overlay или на Cancel.
 */
import React from 'react';
import { View, Text, Pressable, Alert, Modal } from 'react-native';
import { Ionicons } from '@expo/vector-icons';
import { useSafeAreaInsets } from 'react-native-safe-area-context';
import * as ImagePicker from 'expo-image-picker';
import * as DocumentPicker from 'expo-document-picker';

import type { Attachment } from '@/lib/types';

export interface AttachmentMenuProps {
  visible: boolean;
  onClose: () => void;
  /** Вызывается когда attachment готов для отправки. */
  onPick:  (att: Attachment) => void;
}

export function AttachmentMenu({ visible, onClose, onPick }: AttachmentMenuProps) {
  const insets = useSafeAreaInsets();

  const pickImageOrVideo = async () => {
    try {
      const perm = await ImagePicker.requestMediaLibraryPermissionsAsync();
      if (!perm.granted) {
        Alert.alert('Permission needed', 'Grant photos access to attach media.');
        return;
      }
      const result = await ImagePicker.launchImageLibraryAsync({
        mediaTypes:    ImagePicker.MediaTypeOptions.All,
        quality:       0.85,
        allowsEditing: false,
      });
      if (result.canceled) return;
      const asset = result.assets[0];
      onPick({
        kind:     asset.type === 'video' ? 'video' : 'image',
        uri:      asset.uri,
        mime:     asset.mimeType,
        width:    asset.width,
        height:   asset.height,
        duration: asset.duration ? Math.round(asset.duration / 1000) : undefined,
      });
      onClose();
    } catch (e: any) {
      Alert.alert('Pick failed', e?.message ?? 'Unknown error');
    }
  };

  const takePhoto = async () => {
    try {
      const perm = await ImagePicker.requestCameraPermissionsAsync();
      if (!perm.granted) {
        Alert.alert('Permission needed', 'Grant camera access to take a photo.');
        return;
      }
      const result = await ImagePicker.launchCameraAsync({ quality: 0.85 });
      if (result.canceled) return;
      const asset = result.assets[0];
      onPick({
        kind:   asset.type === 'video' ? 'video' : 'image',
        uri:    asset.uri,
        mime:   asset.mimeType,
        width:  asset.width,
        height: asset.height,
      });
      onClose();
    } catch (e: any) {
      Alert.alert('Camera failed', e?.message ?? 'Unknown error');
    }
  };

  const pickFile = async () => {
    try {
      const res = await DocumentPicker.getDocumentAsync({
        type: '*/*',
        copyToCacheDirectory: true,
      });
      if (res.canceled) return;
      const asset = res.assets[0];
      onPick({
        kind: 'file',
        uri:  asset.uri,
        name: asset.name,
        mime: asset.mimeType ?? undefined,
        size: asset.size,
      });
      onClose();
    } catch (e: any) {
      Alert.alert('File pick failed', e?.message ?? 'Unknown error');
    }
  };

  // Voice recorder больше не stub — см. inline-кнопку 🎤 в composer'е,
  // которая разворачивает VoiceRecorder (expo-av Audio.Recording). Опция
  // Voice в этом меню убрана, т.к. дублировала бы UX.

  return (
    <Modal visible={visible} transparent animationType="slide" onRequestClose={onClose}>
      <Pressable
        onPress={onClose}
        style={{ flex: 1, backgroundColor: 'rgba(0,0,0,0.55)' }}
      >
        <View style={{ flex: 1 }} />
        <Pressable
          onPress={() => {}}
          style={{
            backgroundColor: '#111111',
            borderTopLeftRadius: 20,
            borderTopRightRadius: 20,
            paddingTop: 8,
            paddingBottom: Math.max(insets.bottom, 12) + 10,
            paddingHorizontal: 10,
            borderTopWidth: 1, borderColor: '#1f1f1f',
          }}
        >
          {/* Drag handle */}
          <View
            style={{
              alignSelf: 'center',
              width: 40, height: 4, borderRadius: 2,
              backgroundColor: '#2a2a2a',
              marginBottom: 12,
            }}
          />
          <Text
            style={{
              color: '#ffffff', fontSize: 16, fontWeight: '700',
              marginLeft: 8, marginBottom: 12,
            }}
          >
            Attach
          </Text>

          <Row icon="images-outline" label="Photo / video"      onPress={pickImageOrVideo} />
          <Row icon="camera-outline" label="Take photo"         onPress={takePhoto} />
          <Row icon="document-outline" label="File"             onPress={pickFile} />
        </Pressable>
      </Pressable>
    </Modal>
  );
}

function Row({
  icon, label, onPress,
}: {
  icon: React.ComponentProps<typeof Ionicons>['name'];
  label: string;
  onPress: () => void;
}) {
  return (
    <Pressable
      onPress={onPress}
      style={({ pressed }) => ({
        flexDirection: 'row',
        alignItems: 'center',
        gap: 14,
        paddingHorizontal: 14,
        paddingVertical: 14,
        borderRadius: 14,
        backgroundColor: pressed ? '#1a1a1a' : 'transparent',
      })}
    >
      <View
        style={{
          width: 40, height: 40, borderRadius: 10,
          backgroundColor: '#1a1a1a',
          alignItems: 'center', justifyContent: 'center',
        }}
      >
        <Ionicons name={icon} size={20} color="#ffffff" />
      </View>
      <Text style={{ color: '#ffffff', fontSize: 15, fontWeight: '600' }}>{label}</Text>
    </Pressable>
  );
}