/**
 * User: CHT
 * Date: 2020/5/8
 * Time: 14:00
 */

import GraphEvent from './GraphEvent'
import GraphNode from './GraphNode'
import GraphLink from './GraphLink'

import {
  mark,
  arrayReplace
} from './utils'


class Graph extends GraphEvent {
  constructor (options) {
    const {
      relationMark,
      startMark,
      endMark,
      nodeList = [],
      linkList = [],
      origin
    } = options

    super()

    Object.assign(mark, {
      relationMark,
      startMark,
      endMark
    })

    this.nodeList = []
    this.linkList = []

    this.origin = origin

    this.mouseOnLink = null
    this.mouseonNode = null

    this.graphSelected = false
    this.maskBoundingClientRect = {}

    this.initNode(nodeList)
    this.initLink(linkList)
  }

  pointMap () {
    const map = {}
    this.nodeList.forEach(point => {
      map[point[mark.relationMark]] = point
    })
    return map
  }

  initNode (nodeList) {
    arrayReplace(this.nodeList, nodeList.map(node => this.createNode(node)))
    return this.nodeList
  }

  initLink (linkList) {

    const list = []

    linkList.forEach(link => {

      const {
        startAt = [0, 0],
        endAt = [0, 0],
        meta = null
      } = link

     const startId = link[mark.startMark] || ''
     const endId = link[mark.endMark] || ''
      const pointMap = this.pointMap()
      console.log(startId, endId)
      const start = pointMap[startId]
      const end = pointMap[endId]
      if (start && end) {
        list.push(
          this.createLink({
            start,
            end,
            meta,
            startAt,
            endAt
          })
        )
      }
    })

    arrayReplace(this.linkList, list)

    return this.linkList
  }

  createNode (options) {
    return new GraphNode(options, this)
  }

  createLink (options) {
    return new GraphLink(options, this)
  }

  addNode (options) {
    const node = options.constructor === GraphNode
      ? options
      : this.createNode(options)

    this.nodeList.push(node)
    return node
  }

  addLink (options) {
    const newLink = options.constructor === GraphLink
      ? options
      : this.createLink(options)

    const currentLink = this.linkList.find(item => {
      return item.start === newLink.start && item.end === newLink.end
    })

    if (currentLink) {
      currentLink.startAt = newLink.startAt
      currentLink.endAt = newLink.endAt
    } else if (newLink.start && newLink.end) {
      this.linkList.push(newLink)
    }

    return newLink
  }

  removeNode (node) {
    const idx = this.nodeList.indexOf(node)
    this.linkList.filter(link => {
      return link.start === node || link.end === node
    }).forEach(link => {
      this.removeLink(link)
    })

    this.nodeList.splice(idx, 1)

    return node
  }

  removeLink (link) {
    const idx = this.linkList.indexOf(link)
    this.linkList.splice(idx, 1)
    if (this.mouseOnLink === link) {
      this.mouseOnLink = null
    }
    return link
  }

  toLastNode (idx) {
    const nodeList = this.nodeList
    nodeList.splice(
      nodeList.length - 1, 0,
      ...nodeList.splice(idx, 1)
    )
  }

  toLastLink (idx) {
    const linkList = this.linkList
    linkList.splice(
      linkList.length - 1, 0,
      ...linkList.splice(idx, 1)
    )
  }

  toJSON () {
    return {
      origin: this.origin,
      nodeList: this.nodeList.map(node => node.toJSON()),
      linkList: this.linkList.map(link => link.toJSON())
    }
  }

  selectAll () {
    const nodeList = this.nodeList
    const margin = 20

    this.maskBoundingClientRect = {
      top: Math.min(
        ...nodeList.map(
          node => node.center[1] - node.height / 2)
      ) - margin,

      right: Math.max(
        ...nodeList.map(
          node => node.center[0] + node.width / 2)
      ) + margin,

      bottom: Math.max(
        ...nodeList.map(
          node => node.center[1] + node.height / 2)
      ) + margin,

      left: Math.min(
        ...nodeList.map(
          node => node.center[0] - node.width / 2)
      ) - margin
    }

    this.graphSelected = true
  }
}

export default Graph