import { z } from 'zod'

// Generous enough for a photo, small enough to keep rows (and the customer-facing
// page that loads them up front) from bloating — these are data: URLs stored
// inline, not uploads to disk-backed storage, which this app doesn't have.
export const MAX_TABLE_IMAGE_BYTES = 2_000_000

export const ACCEPTED_IMAGE_TYPES = ['image/png', 'image/jpeg', 'image/webp']

export const dataUrlImageSchema = z
  .string()
  .trim()
  .max(Math.ceil((MAX_TABLE_IMAGE_BYTES * 4) / 3) + 100)
  .regex(/^data:image\/(png|jpeg|jpg|webp);base64,/, 'Bild muss als PNG, JPEG oder WebP hochgeladen werden')
  .nullable()

export function readImageAsDataUrl(file: File): Promise<string> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader()
    reader.onload = () => resolve(reader.result as string)
    reader.onerror = () => reject(reader.error ?? new Error('Datei konnte nicht gelesen werden'))
    reader.readAsDataURL(file)
  })
}