import { HttpResponse } from '@angular/common/http'
import { AnyObject } from 'app/shared/components/server-paginated-table'
import { NzTreeNodeOptions } from 'ng-zorro-antd/tree'

export * from './form'
export * from './storage'

export class Utils {
	static flatListToTree(data: any[]): any[] {
		const res: any[] = []
		const map = data.reduce((a, c) => {
			a[c.id] = c
			return a
		}, Object.create(null))

		for (let i of data) {
			if (i.parentId) {
				if (map[i.parentId]['children']) {
					map[i.parentId]['children'].push(i)
				} else {
					map[i.parentId]['children'] = [i]
				}
				map[i.parentId]['isLeaf'] = !map[i.parentId]['children']
				map[i.id]['isLeaf'] = !map[i.id]['children']
			} else {
				i.isLeaf = true
				res.push(i)
			}
		}

		return res
	}

	static treeToFlatList(tree: any[]) {
		tree = JSON.parse(JSON.stringify(tree))
		const res: any[] = []
		const loop = (arr: any[], id?: number) => {
			arr.forEach((i) => {
				if (Array.isArray(i.children) && i.children.length > 0) {
					loop(i.children, i.id) // 如果有children 就递归
					Reflect.deleteProperty(i, 'children') // 删除children，然后push 不能结束
				}
				res.push({ ...i, parentId: id } as any)
			})
		}
		loop(tree)
		return res
	}

	static isEmpty(v: any) {
		return [null, '', void 0].includes(v)
	}

	static objectToURLSearchParams(obj: {}): URLSearchParams {
		const params = new URLSearchParams()
		Object.entries(obj).forEach(([k, v]: [string, any]) => {
			if (!Utils.isEmpty(v)) {
				params.append(k, v)
			}
		})
		return params
	}

	static buildTree<T extends { parentId: number } & AnyObject>(
		organizations: T[],
		keyName: string = 'key',
		titleName: string = 'title',
	): NzTreeNodeOptions[] {
		const map: { [parentId: number]: NzTreeNodeOptions[] } = {}

		organizations.forEach((org) => {
			if (!map[org.parentId]) {
				map[org.parentId] = []
			}
			const treeNode: NzTreeNodeOptions = {
				...org,
				title: org[titleName],
				key: org[keyName].toString(),
			}
			map[org.parentId].push(treeNode)
		})

		const build = (parentId: number): NzTreeNodeOptions[] => {
			if (!map[parentId]) {
				return []
			}
			return map[parentId].map((node) => {
				const children = build(parseInt(node.key))
				return {
					...node,
					isLeaf: children.length === 0,
					children,
				}
			})
		}

		return build(0)
	}
	static downLoadFile(response: HttpResponse<Object>, type: string, ext: string = 'pdf') {
		const fileNameFromHeader = response.headers.get('Content-Disposition')
		let fileName = ''
		if (fileNameFromHeader) {
			fileName = fileNameFromHeader.trim().split('=')[1].replace(/"/g, '')
		}
		console.log('fileName', fileName)
		const blob = new Blob([response.body as any], { type })
		const downloadLink = document.createElement('a')
		downloadLink.href = URL.createObjectURL(blob)
		downloadLink.download = decodeURIComponent(fileName)
		document.body.appendChild(downloadLink)
		downloadLink.click()
		document.body.removeChild(downloadLink)
	}
}