import * as vscode from 'vscode'
import { FormatErr, HtmlParseErr, ErrFromWingedCli } from '../type'
import { ERROR_SOURCE, ERROR_KIND } from '../consts'

export class Diagnostic {
  private collection: vscode.DiagnosticCollection
  constructor() {
    this.collection = vscode.languages.createDiagnosticCollection('winged')
  }

  /**
   * 统一管理 document 的语言 id,确保诊断发生在html中
   * @param document vscode.TextDocument
   * @param arr vscode.Diagnostic[]
   */
  private updateDiagnostics(document: vscode.TextDocument, arr: vscode.Diagnostic[]) {
    if (document && document.languageId === 'html') {
      this.collection.set(document.uri, arr)
    } else {
      this.clearErr()
    }
  }

  /**
   * 清除诊断集合
   */
  public clearErr() {
    this.collection.clear()
  }

  /**
   * 对外暴露的错误处理接口,处理 format 命令格式化抛出来错误,生成诊断信息
   * @param document vscode.TextDocument,
   * @param err FormatErr
   */
  public handleFormatErr(document: vscode.TextDocument, err: FormatErr) {
    const arr: vscode.Diagnostic[] = []
    const range = err.range
    const severity = vscode.DiagnosticSeverity.Error
    const source = ERROR_SOURCE
    let message = `${err.error}\n`
    switch (err.kind) {
      case ERROR_KIND.DATA_POINT:
        message = `数据绑定点语法错误:\n${message}`
        break
      case ERROR_KIND.COND:
        message = `COND表达式语法错误:\n${message}`
        break
      case ERROR_KIND.EVENT_BINDER:
        message = `事件处理器声明错误:\n${message}`
        break
    }
    arr.push({ range, severity, source, message })
    this.updateDiagnostics(document, arr)
  }

  public handleHtmlComplierErr(document: vscode.TextDocument, err: HtmlParseErr) {
    const arr: vscode.Diagnostic[] = []
    const range = err.range
    const severity = vscode.DiagnosticSeverity.Error
    const source = ERROR_SOURCE
    const message = err.message
    arr.push({ range, severity, source, message })
    this.updateDiagnostics(document, arr)
  }

  public handleErrFromCli(content: ErrFromWingedCli) {
    if (content.type === 'success') {
      this.clearErr()
      return
    }
    const document = vscode.window.activeTextEditor?.document
    if (document) {
      const arr: vscode.Diagnostic[] = []
      const severity = vscode.DiagnosticSeverity.Error
      const source = ERROR_SOURCE
      const messageArr: string[] = []
      if (content.title) {
        messageArr.push(content.title)
      }
      if (content.detail) {
        messageArr.push(content.detail)
      }
      const message = messageArr.join('\n')
      const start = content.range.start
      const end = content.range.end
      const range = new vscode.Range(
        new vscode.Position(start.line - 1, start.col),
        new vscode.Position(end.line - 1, end.col)
      )
      if (range) {
        arr.push({ range, severity, source, message })
        this.updateDiagnostics(document, arr)
      }
    }
  }

  public checkCollection(document: vscode.TextDocument) {
    return this.collection.has(document.uri)
  }
}