import sqlite3 from 'better-sqlite3'

export interface IPost {
  slug: string
  date?: Date
  title: string
  image?: string
  tag?: string[]
  /**
   * cleaned markdown
   */
  content: string
  excerptHtml: string
  contentHtml: string
}

export class Database {
  db: sqlite3.Database

  constructor(public filepath: string) {
    this.db = sqlite3(filepath)
  }

  public init(): void {
    this.db.exec(/* sql */ `
    CREATE VIRTUAL TABLE q USING fts5 (
      slug,
      [date]        UNINDEXED,  -- epoch milli
      title,
      [image]       UNINDEXED,
      tag,          -- space separated
      content,      -- cleaned markdown
      excerptHtml   UNINDEXED,
      contentHtml   UNINDEXED
    );
    `)
  }

  public insert(...ps: IPost[]): void {
    const stmt = this.db.prepare(/* sql */ `
    INSERT INTO q (slug, [date], title, [image], tag, content, excerptHtml, contentHtml)
    VALUES (@slug, @date, @title, @image, @tag, @content, @excerptHtml, @contentHtml)
    `)

    this.db.transaction(() => {
      // eslint-disable-next-line array-callback-return
      ps.map((p) => {
        stmt.run({
          ...p,
          date: p.date ? p.date.getTime() : undefined,
          tag: (p.tag || []).join(' '),
        })
      })
    })()
  }
}