import { ASTItem } from '../ast';
import { template, templateDefintions } from './ts-template';
import { REGEXP_SANITIZER_OUTPUT } from '../regexps';

export class FileAST {
  public static newContentDelimiter: string = '/// content';
  public content: string;
  public name: string;
  public parseDefintions: boolean;

  constructor(astItem: ASTItem, parseDefintions: boolean) {
    this.name = parseDefintions ? `${astItem.rawname}.d.ts`: `${astItem.rawname}.ts`;
    this.content = parseDefintions ? templateDefintions(astItem) : template(astItem);
    this.parseDefintions = parseDefintions;
  }

  private replaceContent(content: string) {
    let lines = this.content.split('\n');
    let lineNumber = lines.map(line => line.trim()).indexOf(FileAST.newContentDelimiter);
    lines.splice(lineNumber, 0, content);
    this.content = lines.join('\n');
  }

  public addContent(content: ASTItem) {
    if (this.parseDefintions) {
      this.replaceContent(`\texport const ${content.name}: string;`);
    } else {
      this.replaceContent(`\texport const ${content.name}: string = '${content.value}';`);
    }
  }

  public toString(): string {
    let lines: string[] = this.content.split('\n');
    return lines
      .filter(line => line.trim() !== FileAST.newContentDelimiter)
      .filter(line => line.trim().length > 0)
      .join('\n')
      .replace(REGEXP_SANITIZER_OUTPUT, '');
  }
}