import { computed, type Ref } from 'vue'
import { locales as defaultLocales } from './locales'
import type { ValidationRule as SyValidationRule } from '@/composables/validation/useValidation'

export type TextareaRule = (value: string) => boolean | string

export function useDefaultValidationRules(params: {
	required: Ref<boolean>
	label: Ref<string | undefined>
	maxLines: Ref<number | undefined>
	hasInteracted: Ref<boolean>
	locales: Ref<typeof defaultLocales>
}) {
	const vuetifyRules = computed<TextareaRule[]>(() => {
		const rules: TextareaRule[] = []

		if (params.maxLines.value !== undefined) {
			rules.push((value: string) => {
				const lines = value.split('\n').length
				if (lines > params.maxLines.value!) {
					return params.locales.value.maxLines(params.maxLines.value!)
				}
				return true
			})
		}

		return rules
	})

	const customRules = computed<SyValidationRule[]>(() => {
		const rules: SyValidationRule[] = []

		if (params.required.value) {
			rules.push({
				type: 'required',
				options: {
					message: params.locales.value.required ?? params.locales.value.requiredField(params.label.value),
				},
			})
		}

		if (params.maxLines.value !== undefined) {
			rules.push({
				type: 'custom',
				options: {
					validate: (value: string) => {
						const lines = value.split('\n').length
						return lines <= params.maxLines.value! || params.locales.value.maxLines(params.maxLines.value!)
					},
				},
			})
		}

		return rules
	})

	return {
		vuetifyRules,
		customRules,
	}
}