import { fabric } from 'fabric-with-all'
import { OperationType } from '../tools/layerHelper'
import { getObjectAlphaToCanvas, traceImageContour } from '../tools/canvasMethod'

/** 智能框选工具管理器 */
export class AISelectboxToolManager {
	// 管理器	
	canvasManager: any
	stateManager: any
	layerManager: any
	toolManager: any

	isDragging: boolean = false
	startX: number = 0
	startY: number = 0
	demoObject: any
	constructor(options) {
		this.canvasManager = options.canvasManager
		this.stateManager = options.stateManager
		this.layerManager = options.layerManager
		this.toolManager = options.toolManager
	}
	mouseDownEvent(e) {
		this.isDragging = true
		this.startX = e.absolutePointer.x
		this.startY = e.absolutePointer.y
		const rect = new fabric.Rect({
			left: this.startX,
			top: this.startY,
			width: 0,
			height: 0,
			fill: 'transparent',
			stroke: '#000',
			strokeWidth: 1,
			evented: false,
		})
		this.demoObject = rect
		this.canvasManager.canvas.add(rect)
		this.canvasManager.canvas.renderAll()
	}
	mouseMoveEvent(e) {
		if (!this.isDragging) return;
		var width = e.absolutePointer.x - this.startX
		var height = e.absolutePointer.y - this.startY
		var left = this.startX
		var top = this.startY
		if (width < 0) {
			left += width
			width = -width
		}
		if (height < 0) {
			top += height
			height = -height
		}
		this.demoObject.set({ width, height, left, top })
		this.canvasManager.canvas.renderAll()
	}
	mouseUpEvent(e) {
		if (!this.isDragging) return;
		this.isDragging = false;
		const object = this.demoObject.toJSON("evented")
		if (object.width === 0) object.width = 100
		if (object.height === 0) object.height = 100
		// console.log(object)
		this.canvasManager.canvas.remove(this.demoObject)
		this.canvasManager.canvas.renderAll()

		this.createSelectbox()
	}




	loadImageToObject(url) {
		return new Promise((resolve, reject) => {
			fabric.Image.fromURL(url, (img) => {
				resolve(img);
			}, { crossOrigin: "anonymous" });// 防止污染
		});
	}
	rgba = { r: 0, g: 255, b: 0, a: 200 };
	selectionStyle = {
		stroke: "rgba(255, 77, 71, 1)",
		strokeWidth: 1.5,
		strokeDashArray: [4, 4],
		fill: "transparent",
		strokeUniform: true, // 保持描边宽度不随缩放改变
		selectable: false,
		evented: false,
		absolutePositioned: true,
	};
	async createSelectbox() {
		const url = "http://118.31.39.42:3000/falls/1a48ed3a-1faa-4fcd-bf07-765dba1702c5.png"
		const image = await this.loadImageToObject(url)
		const canvas = getObjectAlphaToCanvas(image, null, 0, this.rgba);
		const fobject = this.canvasManager.canvas.clipPath
		// const top = fobject.top - fobject.height * scaleY / 2;
		// const left = fobject.left - fobject.width * scaleX / 2;
		const scaleY = fobject.scaleY
		const scaleX = fobject.scaleX
		const top = fobject.top
		const left = fobject.left
		const arr = traceImageContour(canvas);
		let minX = fobject.width;
		let minY = fobject.height;
		const str = arr.map((v) => {
			if (v.x < minX) minX = v.x;
			if (v.y < minY) minY = v.y;
			return `${v.x} ${v.y}`
		}).join(" L ");
		const path = new fabric.Path(`M ${str} z`);
		path.set({
			left: left + minX,
			top: top + minY,
			scaleX: scaleX,
			scaleY: scaleY,
			...this.selectionStyle,
		});
		const group = await this.layerManager.createGroupLayer({
			clipPath: path,
		}, false, false)
		const rect = await this.layerManager.createRectLayer({
			width: path.width,
			height: path.height,
			left: left + minX,
			top: top + minY,
			fill: "rgba(255, 186, 186, 0.5)",
			info: { parentId: group.info.id },
		}, false, true)
		await this.canvasManager.updateSubLayerClipPath()
		await this.layerManager.updateLayerThumbnailsById(rect.info.id, "", false)
		await this.layerManager.updateLayerThumbnailsById(group.info.id, rect.thumbnail)
		this.stateManager.recordState()
		this.toolManager.setTool(OperationType.SELECT)
	}



	dispose() { }
}