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

export class SubviewMethodCompletion extends Completion {
  public completionArr: vscode.CompletionItem[] = []
  protected triggerRangeMatcher: RegExp = /@method:/
  private timerCache: number = 0
  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,
      detail: desp,
      kind: vscode.CompletionItemKind.Field,
      insertText: new vscode.SnippetString(`${label}="\${1:bind${utils.camelToPascal(label)}}"`),
    }
  }

  public async getCompletionArr(document: vscode.TextDocument, position: vscode.Position) {
    const res = tc.validateTagRange(document, position, '@method:')
    if (res !== undefined && res.type === 'comp') {
      const now = Date.now()
      if (now - this.timerCache > completionRefreshDelay) {
        const methods = await tc.getMethods(res.name)
        if (methods) {
          this.completionArr = methods.map((item) => {
            return this.getCompletionItem(item.name, item.desp)
          })
          this.timerCache = now
          return this.completionArr
        }
      }
      return this.completionArr
    }
  }
}