/** 문자 명령 — 여러 줄 문자·단일 행 문자·편집·찾기 (조사표 5절 문자 패널) */
import { Point } from '@flatten-js/core';
import { toast } from 'react-toastify';
import { getAnnotationScale } from '../../commands/dim-settings';
import { EntityName } from '../../entities/Entity';
import type { Entity } from '../../entities/Entity';
import type { TextEntity } from '../../entities/TextEntity';
import {
	addEntities,
	getActiveTextStyle,
	getEntities,
	getPickableEntities,
	setEntities,
} from '../../state';
import { Tool } from '../../tools';
import { textEntity } from '../factories/entity-factory';
import { createSequenceTool } from '../factories/sequence-tool';

/** AutoCAD 여러 줄 문자의 줄바꿈 표기(\P)와 \n을 모두 받는다 */
const splitLines = (text: string): string[] =>
	text
		.replace(/\\P/gi, '\n')
		.split('\n')
		.map((line) => line.trim())
		.filter((line) => line.length > 0);

function buildTextLines(lines: string[], basePoint: Point): Entity[] {
	const lineHeight = getActiveTextStyle().fontSize * getAnnotationScale() * 1.35;
	const groupId = lines.length > 1 ? crypto.randomUUID() : undefined;
	return lines.map((line, index) => {
		const entity = textEntity(line, new Point(basePoint.x, basePoint.y - lineHeight * index), {
			textAlign: 'left',
			fontSize: getActiveTextStyle().fontSize * getAnnotationScale(),
		});
		entity.groupId = groupId;
		return entity;
	});
}

export const textToolStateMachine = createSequenceTool({
	tool: Tool.TEXT,
	steps: [
		{ kind: 'point', instructions: '문자의 시작점을 지정하십시오.' },
		{ kind: 'text', instructions: '문자를 입력하십시오.' },
	],
	commit: (input) => {
		const lines = splitLines(input.text(1));
		if (!lines.length) return;
		addEntities(buildTextLines(lines.slice(0, 1), input.point(0)), true);
	},
});

export const mtextToolStateMachine = createSequenceTool({
	tool: Tool.MTEXT,
	steps: [
		{ kind: 'point', instructions: '여러 줄 문자의 첫 코너를 지정하십시오.' },
		{ kind: 'text', instructions: '문자를 입력하십시오 (줄바꿈은 \\P).' },
	],
	commit: (input) => {
		const lines = splitLines(input.text(1));
		if (!lines.length) return;
		addEntities(buildTextLines(lines, input.point(0)), true);
	},
});

export const textEditToolStateMachine = createSequenceTool({
	tool: Tool.TEXTEDIT,
	helpers: false,
	steps: [
		{ kind: 'entity', instructions: '편집할 문자를 선택하십시오.' },
		{ kind: 'text', instructions: '새 문자를 입력하십시오.' },
	],
	commit: (input) => {
		const entity = input.entity(0);
		if (entity.getType() !== EntityName.Text) {
			toast.warn('문자 객체를 선택하십시오.');
			return;
		}
		(entity as TextEntity).setLabel(input.text(1));
		setEntities([...getEntities()], true);
	},
});

export const findToolStateMachine = createSequenceTool({
	tool: Tool.FIND,
	helpers: false,
	steps: [
		{ kind: 'text', instructions: '찾을 문자열을 입력하십시오.' },
		{
			kind: 'text',
			instructions: '바꿀 문자열을 입력하십시오 (그대로 두려면 ENTER).',
			defaultValue: '',
		},
	],
	commit: (input) => {
		const needle = input.text(0);
		const replacement = input.text(1);
		let found = 0;
		let replaced = 0;
		for (const entity of getPickableEntities()) {
			if (entity.getType() !== EntityName.Text) continue;
			const text = entity as TextEntity;
			if (!text.getLabel().includes(needle)) continue;
			found += 1;
			if (replacement) {
				text.setLabel(text.getLabel().split(needle).join(replacement));
				replaced += 1;
			}
		}
		if (replaced) setEntities([...getEntities()], true);
		toast.info(replaced ? `${replaced}개 문자를 바꿨습니다.` : `${found}개 문자를 찾았습니다.`);
	},
});