import { ref, computed } from "vue";
import { NODE_TYPE } from '../tools/index.d'

export interface NodesItem {
	id: string
	type: string
	class: string
	position: { x: number, y: number }
	data: { component: any, type: string }
}
export class StateManager {
	vueFlow: any
	nodes: any
	nodes_: any
	edges: any
	zoom: any
	// 管理器
	eventManager: any
	flowManager: any
	nodeManager: any
	// 设置管理器
	setManager(options) {
		options.eventManager && (this.eventManager = options.eventManager)
		options.flowManager && (this.flowManager = options.flowManager)
		options.nodeManager && (this.nodeManager = options.nodeManager)
	}
	constructor(options) {
		this.vueFlow = options.vueFlow
		this.nodes = ref<NodesItem[]>([]);
		this.nodes_ = computed(() => {
			return this.nodes.value.map((node, index) => {
				const obj = {
					...node,
				}
				if (index === 0) {
					obj.type = NODE_TYPE.INPUT;
				} else if (index === this.nodes.value.length - 1) {
					obj.type = NODE_TYPE.OUTPUT;
				} else {
					obj.type = NODE_TYPE.SECONDARY;
				}
				return obj
			})
		})

		this.edges = computed(() => {
			const arr = []
			this.nodes.value.forEach((node, index) => {
				if (index < this.nodes.value.length - 1) {
					const id = node.id
					const target = this.nodes.value[index + 1].id
					arr.push({
						id: `el-${id}-${target}`,
						source: id,
						target: target,
						selectable: false,
						type: 'default'
					})
				}
			})
			return arr
		})

		this.zoom = ref(1)
	}
	/** 添加节点 */
	addNode(node: NodesItem) {
		this.nodes.value.push(node)
	}
	/** 删除节点 */
	deleteNode(id: string) {
		this.nodes.value = this.nodes.value.filter((node: NodesItem) => node.id !== id)
	}
	getLastNode() {
		return this.nodes.value[this.nodes.value.length - 1]
	}
}