import React, { useState } from 'react';
import { View, Text, TouchableOpacity, Modal, ScrollView, Pressable } from 'react-native';
import { Ionicons } from '@expo/vector-icons';
import { useTheme } from '~/hooks/useTheme';

interface DropdownOption {
	label: string;
	value: string;
}

interface DropdownGroup {
	title: string;
	options: DropdownOption[];
}

interface DropdownProps {
	options: DropdownOption[];
	groups?: DropdownGroup[];
	value: string;
	onValueChange: (value: string) => void;
	placeholder?: string;
	disabled?: boolean;
	title?: string;
}

export function Dropdown({
	options,
	groups,
	value,
	onValueChange,
	placeholder = 'Select an option',
	disabled = false,
	title = 'Select Option',
}: DropdownProps) {
	const [isOpen, setIsOpen] = useState(false);
	const { colors } = useTheme();

	// Find selected option from either flat options or groups
	const allOptions = groups ? groups.flatMap((g) => g.options) : options;
	const selectedOption = allOptions.find((opt) => opt.value === value);

	const handleSelect = (optionValue: string) => {
		onValueChange(optionValue);
		setIsOpen(false);
	};

	return (
		<View>
			<TouchableOpacity
				onPress={() => !disabled && setIsOpen(true)}
				className={`flex-row items-center justify-between rounded-lg border ${colors.border} ${colors.surface} px-4 py-3 ${
					disabled ? 'opacity-50' : ''
				}`}
				disabled={disabled}
			>
				<Text
					className={`flex-1 ${selectedOption ? colors.text : colors.textSecondary}`}
					numberOfLines={1}
				>
					{selectedOption?.label || placeholder}
				</Text>
				<Ionicons
					name={isOpen ? 'chevron-up' : 'chevron-down'}
					size={20}
					color={colors.textSecondary}
				/>
			</TouchableOpacity>

			<Modal
				visible={isOpen}
				transparent
				animationType="fade"
				onRequestClose={() => setIsOpen(false)}
			>
				<Pressable
					style={{ flex: 1, backgroundColor: 'rgba(0, 0, 0, 0.5)' }}
					onPress={() => setIsOpen(false)}
				>
					<View className="flex-1 justify-center px-4">
						<Pressable
							onPress={(e) => e.stopPropagation()}
							className={`max-h-[80%] rounded-xl border ${colors.border} ${colors.surface} shadow-xl`}
						>
							<View className={`border-b ${colors.border} px-4 py-3`}>
								<View className="flex-row items-center justify-between">
									<Text className={`text-lg font-semibold ${colors.text}`}>{title}</Text>
									<TouchableOpacity onPress={() => setIsOpen(false)}>
										<Ionicons name="close-circle" size={24} color={colors.textSecondary} />
									</TouchableOpacity>
								</View>
							</View>
							<ScrollView className="px-2 py-2" showsVerticalScrollIndicator={true}>
								{groups
									? // Render grouped options
										groups.map((group, groupIndex) => (
											<View key={group.title} className={groupIndex > 0 ? 'mt-4' : ''}>
												<Text className={`mx-2 mb-2 text-sm font-bold ${colors.textSecondary}`}>
													{group.title}
												</Text>
												{group.options.map((option) => (
													<TouchableOpacity
														key={option.value}
														onPress={() => handleSelect(option.value)}
														className={`mx-2 mb-1 rounded-lg px-4 py-3 ${
															option.value === value ? colors.primary : colors.surfaceSecondary
														}`}
													>
														<Text
															className={`${
																option.value === value ? 'font-medium text-white' : colors.text
															}`}
														>
															{option.label}
														</Text>
													</TouchableOpacity>
												))}
											</View>
										))
									: // Render flat options
										options.map((option) => (
											<TouchableOpacity
												key={option.value}
												onPress={() => handleSelect(option.value)}
												className={`mx-2 mb-1 rounded-lg px-4 py-3 ${
													option.value === value ? colors.primary : colors.surfaceSecondary
												}`}
											>
												<Text
													className={`${
														option.value === value ? 'font-medium text-white' : colors.text
													}`}
												>
													{option.label}
												</Text>
											</TouchableOpacity>
										))}
							</ScrollView>
						</Pressable>
					</View>
				</Pressable>
			</Modal>
		</View>
	);
}