import Bold from "@geist-ui/icons/bold"
import Italic from "@geist-ui/icons/italic"
import Link from "@geist-ui/icons/link"
import ImageIcon from "@geist-ui/icons/image"
import { RefObject, useCallback, useMemo } from "react"
import styles from "../document.module.css"
import { Button, ButtonGroup } from "@geist-ui/core"

// TODO: clean up

const FormattingIcons = ({
	textareaRef,
	setText
}: {
	textareaRef?: RefObject<HTMLTextAreaElement>
	setText?: (text: string) => void
}) => {
	// const { textBefore, textAfter, selectedText } = useMemo(() => {
	//     if (textareaRef && textareaRef.current) {
	//         const textarea = textareaRef.current
	//         const text = textareaRef.current.value
	//         const selectionStart = textarea.selectionStart
	//         const selectionEnd = textarea.selectionEnd
	//         const textBefore = text.substring(0, selectionStart)
	//         const textAfter = text.substring(selectionEnd)
	//         const selectedText = text.substring(selectionStart, selectionEnd)
	//         return { textBefore, textAfter, selectedText }
	//     }
	//     return { textBefore: '', textAfter: '' }
	// }, [textareaRef,])

	const handleBoldClick = useCallback(() => {
		if (textareaRef?.current && setText) {
			const selectionStart = textareaRef.current.selectionStart
			const selectionEnd = textareaRef.current.selectionEnd
			const text = textareaRef.current.value
			const before = text.substring(0, selectionStart)
			const after = text.substring(selectionEnd)
			const selectedText = text.substring(selectionStart, selectionEnd)

			const newText = `${before}**${selectedText}**${after}`
			setText(newText)
		}
	}, [setText, textareaRef])

	const handleItalicClick = useCallback(() => {
		if (textareaRef?.current && setText) {
			const selectionStart = textareaRef.current.selectionStart
			const selectionEnd = textareaRef.current.selectionEnd
			const text = textareaRef.current.value
			const before = text.substring(0, selectionStart)
			const after = text.substring(selectionEnd)
			const selectedText = text.substring(selectionStart, selectionEnd)
			const newText = `${before}*${selectedText}*${after}`
			setText(newText)
		}
	}, [setText, textareaRef])

	const handleLinkClick = useCallback(() => {
		if (textareaRef?.current && setText) {
			const selectionStart = textareaRef.current.selectionStart
			const selectionEnd = textareaRef.current.selectionEnd
			const text = textareaRef.current.value
			const before = text.substring(0, selectionStart)
			const after = text.substring(selectionEnd)
			const selectedText = text.substring(selectionStart, selectionEnd)
			let formattedText = ""
			if (selectedText.includes("http")) {
				formattedText = `[](${selectedText})`
			} else {
				formattedText = `[${selectedText}](https://)`
			}
			const newText = `${before}${formattedText}${after}`
			setText(newText)
		}
	}, [setText, textareaRef])

	const handleImageClick = useCallback(() => {
		if (textareaRef?.current && setText) {
			const selectionStart = textareaRef.current.selectionStart
			const selectionEnd = textareaRef.current.selectionEnd
			const text = textareaRef.current.value
			const before = text.substring(0, selectionStart)
			const after = text.substring(selectionEnd)
			const selectedText = text.substring(selectionStart, selectionEnd)
			let formattedText = ""
			if (selectedText.includes("http")) {
				formattedText = `![](${selectedText})`
			} else {
				formattedText = `![${selectedText}](https://)`
			}
			const newText = `${before}${formattedText}${after}`
			setText(newText)
		}
	}, [setText, textareaRef])

	const formattingActions = useMemo(
		() => [
			{
				icon: <Bold />,
				name: "bold",
				action: handleBoldClick
			},
			{
				icon: <Italic />,
				name: "italic",
				action: handleItalicClick
			},
			// {
			//     icon: <Underline />,
			//     name: 'underline',
			//     action: handleUnderlineClick
			// },
			{
				icon: <Link />,
				name: "hyperlink",
				action: handleLinkClick
			},
			{
				icon: <ImageIcon />,
				name: "image",
				action: handleImageClick
			}
		],
		[handleBoldClick, handleImageClick, handleItalicClick, handleLinkClick]
	)

	return (
		<div className={styles.actionWrapper}>
			<ButtonGroup className={styles.actions}>
				{formattingActions.map(({ icon, name, action }) => (
					<Button
						auto
						scale={2 / 3}
						px={0.6}
						aria-label={name}
						key={name}
						icon={icon}
						onMouseDown={(e) => e.preventDefault()}
						onClick={action}
					/>
				))}
			</ButtonGroup>
		</div>
	)
}

export default FormattingIcons