import { Completion } from './Completion'
import type { EventResponseCompletion } from '../completion/EventResponseCompletion'
import * as vscode from 'vscode'
import * as json from '../html-event.json'
import { tc } from '../helpers/TsComplier'
import { utils } from '../utils'

export class EventNameCompletion extends Completion {
  public completionArr!: vscode.CompletionItem[]
  protected triggerRangeMatcher: RegExp = /@(bind|catch):/
  constructor() {
    super()
    this.init()
  }
  /**
   * 载入写好的eventName json文件,生成补全数组
   */
  private init() {
    this.completionArr = json.map((el) => {
      const label = el.name
      const desp = el.description?.value
      return this.getCompletionItem(label, desp || '')
    })
  }
  public validateContext(document: vscode.TextDocument, position: vscode.Position): boolean {
    if (document.getWordRangeAtPosition(position, this.triggerRangeMatcher)) {
      return true
    }
    return false
  }
  protected getCompletionItem(label: string, desp: string): vscode.CompletionItem {
    return {
      label,
      kind: vscode.CompletionItemKind.Enum,
      insertText: new vscode.SnippetString(`${label}="\${1:handle${utils.camelToPascal(label)}}"`),
      documentation: desp,
    }
  }
  public async getCompletionArr(
    eventResComplet: EventResponseCompletion,
    document: vscode.TextDocument,
    position: vscode.Position
  ) {
    const res = tc.validateTagRange(document, position, '@bind:')
    if (res) {
      if (res.type === 'comp') {
        return await eventResComplet.getCompletionArr(res.name, true)
      } else {
        return this.completionArr
      }
    } else {
      const res2 = tc.validateTagRange(document, position, '@catch:')
      if (res2) {
        if (res2.type === 'comp') {
          return await eventResComplet.getCompletionArr(res2.name, true)
        } else {
          return this.completionArr
        }
      }
    }
    return null
  }
}