import Database from 'better-sqlite3'
import { v4 } from 'uuid'

const db = new Database('./cosette.db')


function load() {
  db.pragma('journal_mode = WAL')
  db.exec('CREATE TABLE IF NOT EXISTS cosette (uuid TEXT PRIMARY KEY, name TEXT NOT NULL, description TEXT, tags TEXT, images TEXT, updatedAt DATETIME DEFAULT CURRENT_TIMESTAMP)')
  db.exec('CREATE INDEX cosette_updated_at_index ON cosette (updatedAt)')
  db.exec('CREATE TABLE IF NOT EXISTS chan (uuid TEXT PRIMARY KEY, cosetta_uuid REFERENCES cosette(uuid), message TEXT, updatedAt DATETIME DEFAULT CURRENT_TIMESTAMP)')
}
// TODO: da gestire in qualche modo all'avvio
// load()

export function add(cosetta) {
  const q = db.prepare('INSERT INTO cosette (uuid, name, description, tags, images) VALUES(:uuid, :name, :description, :tags, :imgs)')
  cosetta.uuid = v4()
  cosetta.tags = JSON.stringify(cosetta.tags.split(',').map(t => t.toLowerCase().trim()))
  cosetta.imgs = JSON.stringify(cosetta.imgs)
  q.run(cosetta)
  return cosetta
}

export function get(uuid) {
  let q = db.prepare('SELECT * from cosette WHERE uuid = ?')
  const cosetta = q.get(uuid)
  cosetta.tags = cosetta.tags ? JSON.parse(cosetta.tags) : []
  cosetta.images = cosetta.images ? JSON.parse(cosetta.images) : []

  q = db.prepare('SELECT message, updatedAt FROM chan WHERE cosetta_uuid = ? ORDER BY updatedAt desc')
  const comments = q.all(uuid)

  return { cosetta, comments }
}

export function getAll({ page }) {
  page = Number(page || 0)
  const perPage = 3
  let query = 'SELECT * FROM cosette ORDER BY updatedAt DESC LIMIT ? OFFSET ?'
  const q = db.prepare(query)
  const ret = q.all(perPage, perPage * page)
  const cosette = ret.map(r => {
    r.tags = r.tags ? JSON.parse(r.tags) : []
    r.images = r.images ? JSON.parse(r.images) : []
    return r
  })

  const count = db.prepare('SELECT COUNT(*) count from cosette').get().count

  return { cosette, details: { page, count, prev: page !== 0, next: count > perPage * (page + 1), n_page: Math.ceil(count / perPage) } }
}


export function addComment(comment) {
  const q = db.prepare('INSERT INTO chan (uuid, cosetta_uuid, message) VALUES(:uuid, :cosetta_uuid, :message)')
  comment.uuid = v4()
  q.run(comment)
  return comment
}

export function getComments(cosetta_uuid) {
  const q = db.prepare('SELECT * from chan WHERE cosetta_uuid = ?')
  return q.all(cosetta_uuid)
}