import { isVue2, isVue3, createApp, h, Vue2 } from 'vue-demi'
import { HtmlNode } from '@logicflow/core'
import { vueNodesMap } from './registry'
import { isActive, connect, disconnect } from './teleport'

export class VueNodeView extends HtmlNode {
  root?: any
  private vm: any

  getComponentContainer() {
    return this.root
  }

  protected targetId() {
    return `${this.props.graphModel.flowId}:${this.props.model.id}`
  }

  componentWillUnmount() {
    super.componentWillUnmount()
    this.unmount()
  }

  setHtml(rootEl: SVGForeignObjectElement) {
    const el = document.createElement('div')
    el.className = 'custom-vue-node-content'
    this.root = el
    rootEl.appendChild(el)

    this.renderVueComponent()
  }

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  confirmUpdate(_rootEl: SVGForeignObjectElement) {
    // TODO: 如有需要，可以先通过继承的方式，自定义该节点的更新逻辑；我们后续会根据实际需求，丰富该功能
    // console.log('_rootEl', _rootEl)
  }

  protected renderVueComponent() {
    this.unmountVueComponent()
    const root = this.getComponentContainer()
    const { model, graphModel } = this.props

    if (root) {
      const { component } = vueNodesMap[model.type]
      if (component) {
        if (isVue2) {
          const Vue = Vue2 as any
          this.vm = new Vue({
            el: root,
            render(h: any) {
              return h(component, {
                node: model,
                graph: graphModel,
              })
            },
            provide() {
              return {
                getNode: () => model,
                getGraph: () => graphModel,
              }
            },
          })
        } else if (isVue3) {
          if (isActive()) {
            connect(this.targetId(), component, root, model, graphModel)
          } else {
            this.vm = createApp({
              render() {
                return h(component, {
                  node: model,
                  graph: graphModel,
                })
              },
              provide() {
                return {
                  getNode: () => model,
                  getGraph: () => graphModel,
                }
              },
            })
            this.vm?.mount(root)
          }
        }
      }
    }
  }

  protected unmountVueComponent() {
    const root = this.getComponentContainer()
    if (this.vm) {
      isVue2 && this.vm.$destroy()
      isVue3 && this.vm.unmount()
      this.vm = null
    }
    if (root) {
      root.innerHTML = ''
    }
    return root
  }

  unmount() {
    if (isActive()) {
      disconnect(this.targetId())
    }
    this.unmountVueComponent()
  }
}

export default VueNodeView