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import { Button, Flex, FormControl, FormLabel, Textarea } from '@invoke-ai/ui-library';
import { PRESET_PLACEHOLDER } from 'features/stylePresets/hooks/usePresetModifiedPrompts';
import type { ChangeEventHandler } from 'react';
import { useCallback, useMemo, useRef } from 'react';
import type { UseControllerProps } from 'react-hook-form';
import { useController } from 'react-hook-form';
import { useTranslation } from 'react-i18next';
import type { StylePresetFormData } from './StylePresetForm';
interface Props extends UseControllerProps<StylePresetFormData, 'negativePrompt' | 'positivePrompt'> {
label: string;
}
export const StylePresetPromptField = (props: Props) => {
const { field } = useController(props);
const textareaRef = useRef<HTMLTextAreaElement>(null);
const { t } = useTranslation();
const onChange = useCallback<ChangeEventHandler<HTMLTextAreaElement>>(
(v) => {
field.onChange(v.target.value);
},
[field]
);
const value = useMemo(() => {
return field.value;
}, [field.value]);
const insertPromptPlaceholder = useCallback(() => {
if (textareaRef.current) {
const cursorPos = textareaRef.current.selectionStart;
const textBeforeCursor = value.slice(0, cursorPos);
const textAfterCursor = value.slice(cursorPos);
const newValue = textBeforeCursor + PRESET_PLACEHOLDER + textAfterCursor;
field.onChange(newValue);
} else {
field.onChange(value + PRESET_PLACEHOLDER);
}
textareaRef.current?.focus();
}, [value, field, textareaRef]);
const isPromptPresent = useMemo(() => value?.includes(PRESET_PLACEHOLDER), [value]);
return (
<FormControl orientation="vertical" gap={3}>
<Flex alignItems="center" gap={2}>
<FormLabel>{props.label}</FormLabel>
<Button
onClick={insertPromptPlaceholder}
size="xs"
aria-label={t('stylePresets.insertPlaceholder')}
isDisabled={isPromptPresent}
>
{t('stylePresets.insertPlaceholder')}
</Button>
</Flex>
<Textarea size="sm" ref={textareaRef} value={value} onChange={onChange} />
</FormControl>
);
};
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