import * as plugins from './plugins.js';

export interface IDocumentationDirectoryConstructorOptions {
  pathArg: string;
}

/**
 * a documentation directory maps to a directory with markdown documents
 */
export class DocumentationDirectory {
  public options: IDocumentationDirectoryConstructorOptions;
  public smartmarkdownInstance = new plugins.smartmarkdown.SmartMarkdown();
  public articles: plugins.tsclass.content.IArticle[] = [];

  constructor(optionsArg: IDocumentationDirectoryConstructorOptions) {
    this.options = optionsArg;
  }

  /**
   * reads a directory
   */
  public async readDirectory() {
    const smartfileFactory = plugins.smartfile.SmartFileFactory.nodeFs();
    const virtualDirectory = await smartfileFactory.virtualDirectoryFromPath(this.options.pathArg);
    const fileTreeComplete = virtualDirectory.listFiles();
    const articles: plugins.tsclass.content.IArticle[] = [];
    for (const markdownFile of fileTreeComplete.filter(
      (fileArg) => fileArg.parsedPath.ext === '.md'
    )) {
      const parsedMarkdown = await this.smartmarkdownInstance.getMdParsedResultFromMarkdown(
        markdownFile.contents.toString()
      );
      const frontmatterTitle = parsedMarkdown.frontmatterData.title;
      articles.push({
        title: typeof frontmatterTitle === 'string' ? frontmatterTitle : markdownFile.parsedPath.name,
        author: this.normalizeAuthor(parsedMarkdown.frontmatterData.author),
        content: parsedMarkdown.originalString,
        timestamp: Date.now(),
        tags: [`path:${markdownFile.path}`],
      });
    }
    this.articles = articles;
  }

  private normalizeAuthor(authorArg: unknown): plugins.tsclass.content.IAuthor {
    if (typeof authorArg === 'object' && authorArg !== null) {
      const authorCandidate = authorArg as Partial<plugins.tsclass.content.IAuthor>;
      if (
        typeof authorCandidate.firstName === 'string' &&
        typeof authorCandidate.surName === 'string' &&
        authorCandidate.birthday &&
        typeof authorCandidate.birthday.day === 'number' &&
        typeof authorCandidate.birthday.month === 'number' &&
        typeof authorCandidate.birthday.year === 'number'
      ) {
        return {
          firstName: authorCandidate.firstName,
          surName: authorCandidate.surName,
          birthday: authorCandidate.birthday,
          articles: Array.isArray(authorCandidate.articles) ? authorCandidate.articles : [],
        };
      }
    }

    if (typeof authorArg === 'string' && authorArg.trim()) {
      const [firstName, ...surNameParts] = authorArg.trim().split(/\s+/);
      return {
        firstName,
        surName: surNameParts.join(' '),
        birthday: {
          day: 1,
          month: 1,
          year: 1970,
        },
        articles: [],
      };
    }

    return {
      firstName: 'Unknown',
      surName: 'Author',
      birthday: {
        day: 1,
        month: 1,
        year: 1970,
      },
      articles: [],
    };
  }

  public sendAsDocumentationSet(nameArg: string, targetArg: string): void {
    void nameArg;
    void targetArg;

  }

  public async processDirectoryForMkdocs() {}
}