import React, { useState, useEffect } from 'react';
import { __ } from '@wordpress/i18n';
import clsx from 'clsx';
import Icon from '@/utils/Icon';
import useFiltersData from '@/hooks/useFiltersData';
import { type FilterConfig } from '@/config/filterConfig';

interface DeviceFilterSetupProps {
	filterKey: string;
	config: FilterConfig;
	initialValue?: string;
	onChange: ( value: string ) => void;
}

interface DeviceOption {
	id: string;
	key: string;
	title: string;
}

const DeviceFilterSetup: React.FC<DeviceFilterSetupProps> = ({
	initialValue = '',
	onChange
}) => {

	// eslint-disable-next-line @typescript-eslint/ban-ts-comment
	// @ts-ignore
	const { getFilterOptions } = useFiltersData();
	const [ deviceOptions, setDeviceOptions ] = useState<DeviceOption[]>([]);

	useEffect( () => {
		const fetchDeviceOptions = async() => {

			// Fetch device options from the filter data hook
			const options = ( await getFilterOptions( 'devices' ) ) || [];

			// eslint-disable-next-line @typescript-eslint/ban-ts-comment
			// @ts-ignore
			setDeviceOptions( options );
		};
		fetchDeviceOptions();
	}, []); // eslint-disable-line react-hooks/exhaustive-deps

	// Parse initial value to get selected devices array
	const parseSelectedDevices = ( value: string ): string[] => {
		if ( ! value || '' === value.trim() ) {
			return [];
		}
		return value
			.split( ',' )
			.map( ( v ) => v.trim().toLowerCase() )
			.filter( Boolean );
	};

	const [ selectedDevices, setSelectedDevices ] = useState<string[]>(
		parseSelectedDevices( initialValue )
	);

	// Update parent when selectedDevices changes
	useEffect( () => {
		const newValue =
			0 < selectedDevices.length ? selectedDevices.join( ',' ) : '';
		onChange( newValue );
	}, [ selectedDevices, onChange ]);

	const handleDeviceToggle = ( deviceKey: string ) => {
		setSelectedDevices( ( prev ) => {
			if ( prev.includes( deviceKey ) ) {

				// Remove device
				return prev.filter( ( d ) => d !== deviceKey );
			}

			// Add device
			return [ ...prev, deviceKey ];
		});
	};

	const handleDeviceKeyDown = ( e: React.KeyboardEvent, deviceKey: string ) => {
		if ( 'Enter' === e.key || ' ' === e.key ) {
			e.preventDefault();
			handleDeviceToggle( deviceKey );
		}
	};

	const isSelected = ( deviceKey: string ): boolean => {
		return selectedDevices.includes( deviceKey );
	};

	const getAccessibleDescription = ( device: DeviceOption ): string => {
		const baseDescription = `${device.title} device filter`;
		const selectionState = isSelected( device.id ) ?
			__( 'selected', 'burst-statistics' ) :
			__( 'not selected', 'burst-statistics' );
		return `${baseDescription}, ${selectionState}`;
	};

	if ( ! deviceOptions || 0 === deviceOptions.length ) {
		return null;
	}

	return (
		<div className="flex flex-col gap-6">
			{/* Device Options Grid */}
			<div
				className="grid grid-cols-2 @md:grid-cols-4 gap-4 justify-items-center"
				role="group"
				aria-label={__( 'Device selection options', 'burst-statistics' )}
			>
				{deviceOptions.map( ( device: DeviceOption ) => {
					const selected = isSelected( device.id );

					return (
						<button
							key={device.id}
							onClick={() => handleDeviceToggle( device.id )}
							onKeyDown={( e ) => handleDeviceKeyDown( e, device.id )}
							className={clsx(
								'relative rounded-lg border-2 p-4 transition-all duration-200 bg-white w-full group',
								'focus:outline-hidden focus:ring-2 focus:ring-primary focus:ring-offset-2',
								'hover:shadow-md',
								{
									'border-primary bg-primary-100': selected,
									'border-gray-300 hover:border-gray-400':
										! selected
								}
							)}
							aria-label={getAccessibleDescription( device )}
							aria-pressed={selected}
							type="button"
						>
							{/* Selection Indicator */}
							{selected && (
								<div
									className="absolute top-2 right-2 z-10"
									aria-hidden="true"
								>
									<div className="h-2 w-2 rounded-full bg-primary"></div>
								</div>
							)}

							{/* Device Content */}
							<div className="flex flex-col items-center gap-3">
								{/* Icon */}
								<div
									className={clsx(
										'flex h-12 w-12 items-center justify-center rounded-lg transition-colors',
										{
											'bg-primary-100': selected,
											'bg-gray-100 group-hover:bg-gray-200':
												! selected
										}
									)}
									aria-hidden="true"
								>
									<Icon
										name={device.key}
										color="gray"
										size={24}
										aria-hidden="true"
									/>
								</div>

								{/* Label */}
								<div className="text-center">
									<h3
										className={clsx(
											'text-sm font-medium transition-colors text-text-gray'
										)}
									>
										{device.title}
									</h3>
								</div>
							</div>

							{/* Checkbox visual indicator */}
							<div
								className="absolute bottom-2 left-2 z-10"
								aria-hidden="true"
							>
								<div
									className={clsx(
										'h-4 w-4 rounded border-2 transition-all duration-200 flex items-center justify-center',
										{
											'bg-primary border-primary':
												selected,
											'bg-white border-gray-300 group-hover:border-gray-400':
												! selected
										}
									)}
								>
									{selected && (
										<Icon
											name="check"
											size={12}
											color="white"
											aria-hidden="true"
										/>
									)}
								</div>
							</div>
						</button>
					);
				})}
			</div>
		</div>
	);
};

export default DeviceFilterSetup;
