import { Ast, Token, SourceMap } from './nako_types.mjs'

/**
 * なでしこ言語が投げる全てのエラーが継承するクラス
 */
export class NakoError extends Error {
  public type: string
  public tag: string
  public msg: string
  public file: string | undefined
  public line: number | undefined
  public positionJa: string

  constructor (tag: string, msg: string, file: string | undefined = undefined, line: number | undefined = undefined) {
    // エラー位置を分かりやすく日本語に変換
    const positionJa = `${file || ''}${line === undefined ? '' : `(${line + 1}行目): `}`
    // #1223 エラーメッセージに「main__関数名」と表示されるので、main__は省略して表示
    msg = msg.replace(/『main__(.+?)』/g, '『$1』')
    // 親のErrorを呼ぶ
    super(`[${tag}]${positionJa}${msg}`)
    // エラーの種類を設定
    this.name = 'NakoError'
    this.type = 'NakoError'
    this.tag = '[' + tag + ']'
    this.positionJa = positionJa
    this.msg = msg
  }
}

export class NakoIndentError extends NakoError {
  /**
   * @param {string} msg
   * @param {number} line
   * @param {string} file
   */
  constructor (msg: string, line: number, file: string) {
    super('インデントエラー', msg, file, line)
    this.type = 'NakoIndentError'
    this.line = line
    this.file = file
  }
}

// コンパイラの内部でのみ使うエラー。投げられたらtryでキャッチしてLexerErrorへ変更する。
export class InternalLexerError extends NakoError {
  public preprocessedCodeStartOffset: number
  public preprocessedCodeEndOffset: number
  /**
   * @param {string} msg
   * @param {number} preprocessedCodeStartOffset
   * @param {number} preprocessedCodeEndOffset
   * @param {number | undefined} [line]
   * @param {string | undefined} [file]
   */
  constructor (msg: string, preprocessedCodeStartOffset: number, preprocessedCodeEndOffset: number, line: number | undefined, file: string | undefined) {
    super('字句解析エラー（内部エラー）', msg, file, line)
    this.type = 'InternalLexerError'
    this.preprocessedCodeStartOffset = preprocessedCodeStartOffset
    this.preprocessedCodeEndOffset = preprocessedCodeEndOffset
    this.line = line
    this.file = file
  }
}

export class NakoLexerError extends NakoError {
  public startOffset: number
  public endOffset: number
  /**
   * @param {string} msg
   * @param {number | null} startOffset
   * @param {number | null} endOffset,
   * @param {number | undefined} line
   * @param {string | undefined} file
   */
  constructor (
    msg: string,
    startOffset: number,
    endOffset: number,
    line: number | undefined,
    file: string | undefined
  ) {
    super('字句解析エラー', msg, file, line)
    this.type = 'NakoLexerError'
    this.startOffset = startOffset
    this.endOffset = endOffset
    this.line = line
    this.file = file
  }
}

export class NakoSyntaxError extends NakoError {
  public startOffset: number | undefined
  public endOffset: number | undefined
  /**
   * @param {string} msg
   * @param {Ast} first
   * @param {Ast} [last]
   */
  public static fromNode (msg: string, first: Ast | Token | SourceMap, last: Ast|undefined = undefined) {
    if (!first) {
      return new NakoSyntaxError(msg, undefined, undefined, undefined, undefined)
    }
    const startOffset = typeof first.startOffset === 'number' ? first.startOffset : undefined
    const endOffset =
      (last && typeof last.endOffset === 'number')
        ? last.endOffset
        : (typeof first.endOffset === 'number' ? first.endOffset : undefined)
    return new NakoSyntaxError(msg, first.line, startOffset, endOffset, first.file)
  }

  /**
   * @param {string} msg
   * @param {number | undefined} line
   * @param {number | undefined} startOffset
   * @param {number | undefined} endOffset
   * @param {string | undefined} file
   */
  constructor (msg: string, line: number | undefined, startOffset: number | undefined, endOffset: number | undefined, file: string | undefined) {
    super('文法エラー', msg, file, line)
    this.type = 'NakoSyntaxError'
    this.file = file
    this.line = line
    this.startOffset = startOffset
    this.endOffset = endOffset
  }
}

export class NakoRuntimeError extends NakoError {
  public lineNo: string | undefined
  /**
   * @param error エラー
   * @param lineNo 発生行
   */
  constructor (error: Error | string, lineNo: string | undefined) {
    let msg = 'unknown'
    if (typeof error === 'string') {
      msg = error
    } else {
      if (error instanceof NakoRuntimeError) {
        msg = error.msg
      } else if (error instanceof NakoError) {
        msg = error.msg
      } else if (error instanceof Error) {
        if (error.name === 'Error') {
          msg = error.message
        } else {
          msg = `${error.name}: ${error.message}`
        }
      }
    }

    // 行番号を表す文字列をパースする。
    let line: undefined | number
    let file: undefined | string
    let matches: any
    if (lineNo === undefined) {
      line = undefined
      file = undefined
    // eslint-disable-next-line no-cond-assign
    } else if (matches = /^l(-?\d+):(.*)$/.exec(lineNo)) {
      line = parseInt(matches[1])
      file = matches[2]
    // eslint-disable-next-line no-cond-assign
    } else if (matches = /^l(-?\d+)$/.exec(lineNo)) {
      line = parseInt(matches[1])
      file = 'main.nako3'
    } else {
      line = 0
      file = lineNo
    }

    super('実行時エラー', msg, file, line)
    this.type = 'NakoRuntimeError'
    this.lineNo = lineNo
    this.line = line
    this.file = file
  }
}

export class NakoImportError extends NakoError {
  /**
   * @param {string} msg
   * @param {string} file
   * @param {number} line
   */
  constructor (msg: string, file: string, line: number) {
    super('取り込みエラー', msg, file, line)
    this.file = file
    this.line = line
  }
}