<script setup lang="ts">
import type { IUpdateInformation } from '@/Interface';
import InputTriple from '@/components/InputTriple/InputTriple.vue';
import ParameterInputFull from '@/components/ParameterInputFull.vue';
import ParameterInputHint from '@/components/ParameterInputHint.vue';
import ParameterIssues from '@/components/ParameterIssues.vue';
import { useWorkflowHelpers } from '@/composables/useWorkflowHelpers';
import { isExpression, stringifyExpressionResult } from '@/utils/expressions';
import type { AssignmentValue, INodeProperties, Result } from 'n8n-workflow';
import { computed, ref } from 'vue';
import TypeSelect from './TypeSelect.vue';
import { useNDVStore } from '@/stores/ndv.store';
import { useRouter } from 'vue-router';

interface Props {
	path: string;
	modelValue: AssignmentValue;
	issues: string[];
	hideType?: boolean;
	isReadOnly?: boolean;
	index?: number;
}

const props = defineProps<Props>();

const assignment = ref<AssignmentValue>(props.modelValue);

const emit = defineEmits<{
	'update:model-value': [value: AssignmentValue];
	remove: [];
}>();

const ndvStore = useNDVStore();
const router = useRouter();
const { resolveExpression } = useWorkflowHelpers({ router });

const assignmentTypeToNodeProperty = (
	type: string,
): Partial<INodeProperties> & Pick<INodeProperties, 'type'> => {
	switch (type) {
		case 'boolean':
			return {
				type: 'options',
				default: false,
				options: [
					{ name: 'false', value: false },
					{ name: 'true', value: true },
				],
			};
		case 'array':
		case 'object':
		case 'any':
			return { type: 'string' };
		default:
			return { type } as INodeProperties;
	}
};

const nameParameter = computed<INodeProperties>(() => ({
	name: 'name',
	displayName: 'Name',
	default: '',
	requiresDataPath: 'single',
	placeholder: 'name',
	type: 'string',
}));

const valueParameter = computed<INodeProperties>(() => {
	return {
		name: 'value',
		displayName: 'Value',
		default: '',
		placeholder: 'value',
		...assignmentTypeToNodeProperty(assignment.value.type ?? 'string'),
	};
});

const hint = computed(() => {
	const { value } = assignment.value;
	if (typeof value !== 'string' || !value.startsWith('=')) {
		return '';
	}

	let result: Result<unknown, Error>;
	try {
		const resolvedValue = resolveExpression(
			value,
			undefined,
			ndvStore.isInputParentOfActiveNode
				? {
						targetItem: ndvStore.expressionTargetItem ?? undefined,
						inputNodeName: ndvStore.ndvInputNodeName,
						inputRunIndex: ndvStore.ndvInputRunIndex,
						inputBranchIndex: ndvStore.ndvInputBranchIndex,
					}
				: {},
		) as unknown;

		result = { ok: true, result: resolvedValue };
	} catch (error) {
		result = { ok: false, error };
	}

	return stringifyExpressionResult(result);
});

const highlightHint = computed(() => Boolean(hint.value && ndvStore.getHoveringItem));

const valueIsExpression = computed(() => {
	const { value } = assignment.value;

	return typeof value === 'string' && isExpression(value);
});

const onAssignmentNameChange = (update: IUpdateInformation): void => {
	assignment.value.name = update.value as string;
};

const onAssignmentTypeChange = (update: string): void => {
	assignment.value.type = update;

	if (update === 'boolean' && !valueIsExpression.value) {
		assignment.value.value = false;
	}
};

const onAssignmentValueChange = (update: IUpdateInformation): void => {
	assignment.value.value = update.value as string;
};

const onRemove = (): void => {
	emit('remove');
};

const onBlur = (): void => {
	emit('update:model-value', assignment.value);
};
</script>

<template>
	<div
		:class="{
			[$style.wrapper]: true,
			[$style.hasIssues]: issues.length > 0,
			[$style.hasHint]: !!hint,
		}"
		data-test-id="assignment"
	>
		<n8n-icon-button
			v-if="!isReadOnly"
			type="tertiary"
			text
			size="mini"
			icon="trash"
			data-test-id="assignment-remove"
			:class="$style.remove"
			@click="onRemove"
		></n8n-icon-button>

		<div :class="$style.inputs">
			<InputTriple middle-width="100px">
				<template #left>
					<ParameterInputFull
						:key="nameParameter.type"
						display-options
						hide-label
						hide-hint
						:is-read-only="isReadOnly"
						:parameter="nameParameter"
						:value="assignment.name"
						:path="`${path}.name`"
						data-test-id="assignment-name"
						@update="onAssignmentNameChange"
						@blur="onBlur"
					/>
				</template>
				<template v-if="!hideType" #middle>
					<TypeSelect
						:class="$style.select"
						:model-value="assignment.type ?? 'string'"
						:is-read-only="isReadOnly"
						@update:model-value="onAssignmentTypeChange"
					>
					</TypeSelect>
				</template>
				<template #right="{ breakpoint }">
					<div :class="$style.value">
						<ParameterInputFull
							:key="valueParameter.type"
							display-options
							hide-label
							hide-issues
							hide-hint
							is-assignment
							:is-read-only="isReadOnly"
							:options-position="breakpoint === 'default' ? 'top' : 'bottom'"
							:parameter="valueParameter"
							:value="assignment.value"
							:path="`${path}.value`"
							data-test-id="assignment-value"
							@update="onAssignmentValueChange"
							@blur="onBlur"
						/>
						<ParameterInputHint
							data-test-id="parameter-expression-preview-value"
							:class="$style.hint"
							:highlight="highlightHint"
							:hint="hint"
							single-line
						/>
					</div>
				</template>
			</InputTriple>
		</div>

		<div :class="$style.status">
			<ParameterIssues v-if="issues.length > 0" :issues="issues" />
		</div>
	</div>
</template>

<style lang="scss" module>
.wrapper {
	position: relative;
	display: flex;
	align-items: flex-end;
	gap: var(--spacing-4xs);

	&.hasIssues {
		--input-border-color: var(--color-danger);
	}

	&.hasHint {
		padding-bottom: var(--spacing-s);
	}

	&:hover {
		.remove {
			opacity: 1;
		}
	}
}

.inputs {
	display: flex;
	flex-direction: column;
	flex-grow: 1;
	min-width: 0;

	> div {
		flex-grow: 1;
	}
}

.value {
	position: relative;

	.hint {
		position: absolute;
		bottom: calc(var(--spacing-s) * -1);
		left: 0;
		right: 0;
	}
}

.remove {
	position: absolute;
	left: 0;
	top: var(--spacing-l);
	opacity: 0;
	transition: opacity 100ms ease-in;
}

.status {
	align-self: flex-start;
	padding-top: 28px;
}

.statusIcon {
	padding-left: var(--spacing-4xs);
}
</style>
