import { fabric } from "fabric-with-all";
import { traceImageContour, imageToCanvas } from "../utils/helper";
import { OperationType } from "../utils/layerHelper";
import { CreateSelectionCommand } from "../commands/SelectionCommands";
import { ClearSelectionCommand } from "../commands/LassoCutoutCommand";
import addIcon from "@/assets/images/canvas/add.png";
import removeIcon from "@/assets/images/canvas/remove.png";
import { Https } from "@/tool/https";
import store from "@/store";
import { createStaticCanvas } from "../utils/canvasFactory";
import { getObjectAlphaToCanvas } from "../utils/objectHelper";


/**
 * 部件选择管理器
 */
export class PartManager {
	/**
	 * 创建部件选择管理器
	 * @param {Object} options 配置选项
	 * @param {Object} options.canvas fabric.js画布实例
	 * @param {Object} options.commandManager 命令管理器实例
	 * @param {Object} options.canvasManager 画布管理实例
	 * @param {Object} options.layerManager 图层管理实例
	 * @param {Object} options.toolManager 工具管理实例
	 */
	constructor(options = {}) {
		this.canvas = options.canvas;
		this.commandManager = options.commandManager;
		this.layerManager = options.layerManager;
		this.canvasManager = options.canvasManager;
		this.toolManager = options.toolManager;
		this.props = options.props;

		// 状态
		this.isActive = false;

		// 不再直接绑定事件处理函数
		this._mouseDownHandler = null;
		this._mouseMoveHandler = null;
		this._mouseUpHandler = null;
		this._keyDownHandler = null;

		// 选区相关的工具类型
		this.tools = [
			OperationType.PART,
			OperationType.PART_RECTANGLE,
			OperationType.PART_BRUSH,
			OperationType.PART_ERASER,
		];


		// 当前工具
		this.activeTool = this.toolManager.activeTool;

		this.partGroup = null; // 当前选区对象
		this.partId = "part_selector";
		this.partCanvas = null;// 选区画布
		// 点选工具相关
		this.pointList = []; // 存储点选坐标
	}

	/**
	 * 设置当前工具
	 * @param {String} toolId 工具ID
	 */
	setCurrentTool(toolId) {
		// 检查是否为选区工具
		const wasActive = this.isActive;
		this.isActive = this.tools.includes(toolId);

		// 如果从非选区工具切换到选区工具，初始化事件
		if (!wasActive && this.isActive) {
			this.initEvents();
			this.createPartObject();
		}
		// 如果从选区工具切换到非选区工具，清理事件和选区
		else if (wasActive && !this.isActive) {
			this.cleanupEvents();
			this.clearPartObject();
			this.clearPointData();
		} else {
			this.clearPointData();
			this.resetPartObject();
		}
		console.log("切换工具", toolId);
	}

	/** 初始化选区相关事件 */
	initEvents() {
		if (!this.canvas || this._mouseDownHandler) return; // 避免重复初始化

		// 保存实例引用，用于事件处理函数中
		const self = this;

		// 鼠标按下事件处理
		this._mouseDownHandler = (options) => {
			// 如果选区功能未激活，不处理事件
			if (!this.isActive) return;
			// 阻止事件冒泡，避免与 CanvasEventManager 冲突
			options.e.stopPropagation();
			switch (this.activeTool.value) {
				case OperationType.PART:
					this._pointDownkHandler(options);
					break;
				case OperationType.PART_RECTANGLE:
					this._rectangleDownHandler(options);
					break;
				case OperationType.PART_BRUSH:
					this._brushDownHandler(options);
					break;
				case OperationType.PART_ERASER:
					this._eraseDownHandler(options);
					break;

				default:
					break;
			}
		};

		// 鼠标移动事件处理
		this._mouseMoveHandler = (options) => {
			// 如果选区功能未激活或没有正在绘制的对象，不处理事件
			if (!this.isActive) return;
			// 阻止事件冒泡
			options.e.stopPropagation();
			switch (this.activeTool.value) {
				case OperationType.PART:
					this._pointMoveHandler(options);
					break;
				case OperationType.PART_RECTANGLE:
					this._rectangleMoveHandler(options);
					break;
				case OperationType.PART_BRUSH:
					this._brushMoveHandler(options);
					break;
				case OperationType.PART_ERASER:
					this._eraseMoveHandler(options);
					break;

				default:
					break;
			}
		};

		// 鼠标抬起事件处理
		this._mouseUpHandler = (options) => {
			// 如果选区功能未激活或没有正在绘制的对象，不处理事件
			if (!this.isActive) return;
			// 阻止事件冒泡
			if (options && options.e) {
				options.e.stopPropagation();
			}
			switch (this.activeTool.value) {
				case OperationType.PART:
					this._pointUpHandler(options);
					break;
				case OperationType.PART_RECTANGLE:
					this._rectangleUpHandler(options);
					break;
				case OperationType.PART_BRUSH:
					this._brushUpHandler(options);
					break;
				case OperationType.PART_ERASER:
					this._eraseUpHandler(options);
					break;

				default:
					break;
			}
		};

		// 键盘事件处理
		this._keyDownHandler = (event) => {
			// 只在选区功能激活时处理键盘事件
			if (!this.isActive) return;
		};

		// 添加事件监听
		this.canvas.on("mouse:down", this._mouseDownHandler);
		this.canvas.on("mouse:move", this._mouseMoveHandler);
		this.canvas.on("mouse:up", this._mouseUpHandler);

		// 添加键盘事件监听
		document.addEventListener("keydown", this._keyDownHandler);
	}

	/** 清理事件监听 */
	cleanupEvents() {
		if (!this.canvas) return;

		// 移除事件监听
		if (this._mouseDownHandler) {
			this.canvas.off("mouse:down", this._mouseDownHandler);
			this._mouseDownHandler = null;
		}
		if (this._mouseMoveHandler) {
			this.canvas.off("mouse:move", this._mouseMoveHandler);
			this._mouseMoveHandler = null;
		}
		if (this._mouseUpHandler) {
			this.canvas.off("mouse:up", this._mouseUpHandler);
			this._mouseUpHandler = null;
		}
		if (this._keyDownHandler) {
			document.removeEventListener("keydown", this._keyDownHandler);
			this._keyDownHandler = null;
		}
	}

	/** 点选工具模式下点击事件处理 */
	_pointDownkHandler(options) {
		// const button = options.button;
		// const isLeft = button === 1;// 左键1（添加）  右键3（删除）
		// const icon = `url("${isLeft ? addIcon : removeIcon}") 16 16, default`
		// this.canvas.upperCanvasEl.style.cursor = icon;
	}
	/** 点选工具模式下移动事件处理 */
	_pointMoveHandler(options) { }
	/** 点选工具模式下抬起事件处理 */
	async _pointUpHandler(options) {
		const button = options.button;
		const isLeft = button === 1;// 左键1（添加）  右键3（删除）
		const fixedObject = this.canvasManager.getFixedLayerObject();
		if (!fixedObject) return console.warn("未找到固定图层");
		const { x, y } = this.handleMousePosition(options, fixedObject);
		const label = isLeft ? 1 : 0;
		const points = [];
		const labels = [];
		this.pointList.forEach((item) => {
			points.push([item.x, item.y]);
			labels.push(item.label);
		});
		points.push([x, y]);
		labels.push(label);
		const url = await this.getSegAnythingImage({
			type: "point",
			points,
			labels,
		});
		this.pointList.push({
			x: x,
			y: y,
			label: label,
		})
		const image1 = await this.loadImageToObject(url);
		this.resetPartObject();
		const group = this.partGroup;
		const rgba = { r: 0, g: 255, b: 0, a: 200 }
		const canvas = getObjectAlphaToCanvas(image1, null, 0, rgba);
		this.partCanvas = canvas;
		const image2 = new fabric.Image(canvas);
		image2.set({
			originX: fixedObject.originX,
			originY: fixedObject.originY,
		});
		group.add(image2);
		for (let i = 0; i < this.pointList.length; i++) {
			const item = this.pointList[i];
			const icon = await this.loadImageToObject(item.label === 1 ? addIcon : removeIcon);
			icon.set({
				left: item.x - group.width / 2,
				top: item.y - group.height / 2,
				originX: fixedObject.originX,
				originY: fixedObject.originY,
			})
			group.add(icon);
		}
		this.canvas.renderAll();
	}
	/** 清空点选数据 */
	clearPointData() {
		this.pointList = [];
		this.partCanvas = null;
	}


	/** 框选工具模式下点击事件处理 */
	_rectangleDownHandler(options) {
		this.clearPointData();
		const fixedObject = this.canvasManager.getFixedLayerObject();
		if (!fixedObject) return console.warn("未找到固定图层");
		const { x, y } = this.handleMousePosition(options, fixedObject);
		this.pointList.push(x, y);
	}
	/** 框选工具模式下移动事件处理 */
	_rectangleMoveHandler(options) { }
	/** 框选工具模式下抬起事件处理 */
	async _rectangleUpHandler(options) {
		const fixedObject = this.canvasManager.getFixedLayerObject();
		if (!fixedObject) return console.warn("未找到固定图层");
		const { x, y } = this.handleMousePosition(options, fixedObject);
		this.pointList.push(x, y);

		if (this.pointList.length !== 4) return console.warn("框选工具选择区域必须是矩形");
		const url = await this.getSegAnythingImage({
			type: "box",
			box: [...this.pointList],
		});
		const image1 = await this.loadImageToObject(url);
		this.resetPartObject();
		const group = this.partGroup;
		const rgba = { r: 0, g: 255, b: 0, a: 200 }
		const canvas = getObjectAlphaToCanvas(image1, null, 0, rgba);
		this.partCanvas = canvas;
		const image2 = new fabric.Image(canvas);
		image2.set({
			originX: fixedObject.originX,
			originY: fixedObject.originY,
		});
		group.add(image2);
		this.canvas.renderAll();
	}


	/** 绘制工具模式下点击事件处理 */
	_brushDownHandler(options) {
	}
	/** 绘制工具模式下移动事件处理 */
	_brushMoveHandler(options) {

	}
	/** 绘制工具模式下抬起事件处理 */
	_brushUpHandler(options) {
	}


	/** 擦除工具模式下抬起事件处理 */
	_eraseUpHandler(options) {
	}
	/** 擦除工具模式下点击事件处理 */
	_eraseDownHandler(options) {
	}
	/** 擦除工具模式下移动事件处理 */
	_eraseMoveHandler(options) {

	}

	/** 处理鼠标点位 */
	handleMousePosition(options, fixedObject) {
		const pos = options.absolutePointer;
		const { x, y } = options.absolutePointer;
		const width = fixedObject.width * fixedObject.scaleX;
		const height = fixedObject.height * fixedObject.scaleY;
		const X = (x - (fixedObject.left - width / 2)) / fixedObject.scaleX;
		const Y = (y - (fixedObject.top - height / 2)) / fixedObject.scaleY;
		return {
			x: Math.round(X),
			y: Math.round(Y),
		}
	}

	/** 获取分隔后图片 */
	async getSegAnythingImage(obj) {
		setTimeout(() => {
			this.canvas.loading.value = true;
		});
		return new Promise((resolve, reject) => {
			// const user_id = store.state.UserHabit.userDetail.userId;
			const user_id = 24299;
			const data = {
				image_path: this.props.clothingMinIOPath,
				user_id,
				...obj,
			}
			Https.axiosPost(Https.httpUrls.segAnything, data)
				.then(response => {
					this.canvas.loading.value = false;
					if (response) {
						resolve(response);
					} else {
						console.error("获取分隔后图片失败");
					}
				})
				.catch(error => {
					this.canvas.loading.value = false;
					console.error(error);
				});
		});
	}

	/** 删除指定ID的对象 */
	removeObjectsById(id) {
		const objects = this.canvas.getObjects().filter(obj => obj.id === id);
		this.canvas.remove(...objects);
	}
	loadImageToObject(url) {
		return new Promise((resolve, reject) => {
			fabric.Image.fromURL(url, (img) => {
				resolve(img);
			}, { crossOrigin: "anonymous" });// 防止污染
		});
	}

	/** 重置点位对象组 */
	resetPartObject(render = false) {
		this.clearPartObject();
		this.createPartObject();
		if (render) this.canvas.renderAll();
	}
	createPartObject() {
		const fixedObject = this.canvasManager.getFixedLayerObject();
		if (!fixedObject) return console.warn("未找到固定图层");
		const group = new fabric.Group();
		group.set({
			id: this.partId,
			opacity: 1,
			left: fixedObject.left,
			top: fixedObject.top,
			width: fixedObject.width,
			height: fixedObject.height,
			scaleX: fixedObject.scaleX,
			scaleY: fixedObject.scaleY,
			originX: fixedObject.originX,
			originY: fixedObject.originY,
			selectable: false,
			evented: false,
		})
		this.canvas.add(group);
		this.partGroup = group;
	}
	/** 清空点位对象组 */
	clearPartObject() {
		this.removeObjectsById(this.partId);
		this.partGroup = null;
	}

	/** 创建当前选区 */
	createPart() {
		if (!this.partCanvas) return console.warn("没有点位画布");
		const fixedObject = this.canvasManager.getFixedLayerObject();
		if (!fixedObject) return console.warn("未找到固定图层");
		const scaleY = fixedObject.scaleY
		const scaleX = fixedObject.scaleX
		const top = fixedObject.top - fixedObject.height * scaleY / 2;
		const left = fixedObject.left - fixedObject.width * scaleX / 2;
		const arr = traceImageContour(this.partCanvas);
		let minX = fixedObject.width;
		let minY = fixedObject.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 * scaleX,
			top: top + minY * scaleY,
			scaleX: scaleX,
			scaleY: scaleY,
			fill: "rgba(127, 255, 127, 0.3)",
			stroke: "#2AA81B",
			strokeWidth: 2,
			strokeDashArray: [8, 4],
			strokeLineCap: "round",// 折线端点样式
			strokeLineJoin: "bevel", // 折线连接样式
			strokeUniform: true, // 保持描边宽度不随缩放改变
		});
		// this.partGroup.add(path);
		this.canvas.add(path);
		this.canvas.renderAll();
		this.clearPart();
	}
	/** 清空点位 */
	clearPart() {
		this.pointList = [];
		this.resetPartObject(true);
	}

	/**
	 * 清理资源
	 */
	dispose() {
		this.cleanupEvents();
		this.clearPartObject();
		this.clearPointData();

		this.canvas = null;
		this.commandManager = null;
		this.layerManager = null;
	}
}