/** 연장·결합·분해·지우기 (조사표 2절) */
import { toast } from 'react-toastify';
import { SELECT_OBJECTS } from '../../commands/prompt';
import type { Entity } from '../../entities/Entity';
import { addEntities, deleteEntities, setSelectedEntityIds } from '../../state';
import { Tool } from '../../tools';
import { createSequenceTool } from '../factories/sequence-tool';
import { explodeEntity, joinEntities } from './modify.helpers';

/** EXTEND 빠른 모드는 TRIM 과 한 머신 꼴(eraser-tool.ts) */
export { extendToolStateMachine } from '../eraser-tool';

export const joinToolStateMachine = createSequenceTool({
	tool: Tool.JOIN,
	helpers: false,
	steps: [
		{
			kind: 'selection',
			prompt: {
				text: '한 번에 결합할 원본 객체 또는 여러 객체 선택',
				options: SELECT_OBJECTS.options,
			},
		},
	],
	commit: (input) => {
		const entities = input.entities(0);
		const joined = joinEntities(entities);
		if (!joined) {
			toast.warn('끝점이 맞닿는 객체가 없어 결합하지 못했습니다.');
			return;
		}
		deleteEntities(entities, false);
		addEntities([joined], true);
		setSelectedEntityIds([]);
	},
});

export const explodeToolStateMachine = createSequenceTool({
	tool: Tool.EXPLODE,
	helpers: false,
	steps: [{ kind: 'selection', instructions: '분해할 객체를 선택한 뒤 ENTER.' }],
	commit: (input) => {
		const entities = input.entities(0);
		const exploded: Entity[] = [];
		const consumed: Entity[] = [];
		for (const entity of entities) {
			const parts = explodeEntity(entity);
			if (parts.length) {
				exploded.push(...parts);
				consumed.push(entity);
			}
		}
		if (!consumed.length) {
			toast.info('분해할 수 있는 복합 객체가 없습니다.');
			return;
		}
		deleteEntities(consumed, false);
		addEntities(exploded, true);
		setSelectedEntityIds([]);
	},
});

export const eraseToolStateMachine = createSequenceTool({
	tool: Tool.ERASE,
	helpers: false,
	steps: [{ kind: 'selection', instructions: '지울 객체를 선택한 뒤 ENTER.' }],
	commit: (input) => {
		const entities = input.entities(0);
		if (!entities.length) return;
		deleteEntities(entities, true);
		setSelectedEntityIds([]);
	},
});