import { Completion } from './Completion'
import * as vscode from 'vscode'
import { tc } from '../helpers/TsComplier'
import { utils } from '../utils'
import { completionRefreshDelay } from '../readConfig'

export class EventResponseCompletion extends Completion {
  public completionArr: vscode.CompletionItem[] = []
  private timerCache = 0
  private compName!: string

  public validateContext(document: vscode.TextDocument, position: vscode.Position): boolean {
    const res = tc.validateTagRange(document, position, ':')
    if (res !== undefined && res.type === 'comp') {
      this.compName = res.name
      return true
    }
    return false
  }
  protected getCompletionItem(label: string, desp: string): vscode.CompletionItem {
    return {
      label,
      kind: vscode.CompletionItemKind.Function,
      insertText: new vscode.SnippetString(`${label}="\${1:handle${utils.camelToPascal(label)}}"`),
      documentation: `eventsType.${label}`,
      detail: desp,
    }
  }
  /**
   * 获取 事件响应补全信息
   * @param linePrefix 前缀 or 组件名
   * @param flag 如果flag为true  linePrefix 为组件名跳过parse,否则需要 parse
   */
  public async getCompletionArr(linePrefix: string, flag?: boolean) {
    let compName: string | undefined
    if (flag) {
      compName = linePrefix
    } else {
      if (this.compName) {
        compName = this.compName
      }
    }
    if (!compName) return null
    const now = Date.now()
    if (now - this.timerCache > completionRefreshDelay) {
      this.timerCache = now
      const desp = await tc.getEventsTypeDespByCompName(compName)
      if (desp) {
        this.completionArr = Object.keys(desp).map((item) => {
          return this.getCompletionItem(item, utils.marshalIndent(desp[item]))
        })
        return this.completionArr
      }
    }
    return this.completionArr
  }
}