import type { H3Event } from 'h3'

interface SelectValue {
  value: string
}

export interface PackerRow {
  id: number
  item: string | null
  category: SelectValue | null
  sharable: boolean
  every_n_days?: string | null
  weight_g?: string | null
  season?: SelectValue[] | null
  activity?: SelectValue[] | null
  /** A single select; a multiple select works too */
  weather?: SelectValue | SelectValue[] | null
}

interface PackerField {
  name: string
  select_options?: SelectValue[]
}

export function packerTable(event: H3Event): string {
  const { baserowPackerTableId } = useRuntimeConfig(event)
  if (!baserowPackerTableId) {
    throw createError({ statusCode: 500, statusMessage: 'NUXT_BASEROW_PACKER_TABLE_ID is not set' })
  }
  return baserowPackerTableId
}

/** Baserow sends numbers as strings; empty, zero and negative mean "not set" */
function positive(value: string | null | undefined): number | null {
  const number = Number(value)
  return value && number > 0 ? number : null
}

export function toPackerItem(row: PackerRow): PackerItem | null {
  const name = (row.item ?? '').trim()
  if (!name) return null
  return {
    id: row.id,
    name,
    category: row.category?.value ?? 'Andere',
    sharable: !!row.sharable,
    everyNDays: positive(row.every_n_days),
    weightG: positive(row.weight_g),
    seasons: (row.season ?? [])
      .map(option => option.value as PackerSeason)
      .filter(season => PACKER_SEASONS.includes(season)),
    activities: (row.activity ?? []).map(option => option.value),
    weathers: [row.weather ?? []].flat().map(option => option.value)
  }
}

/** The options of the `activity` and `weather` fields, in the order set in Baserow */
export async function listPackerOptions(event: H3Event): Promise<Pick<PackerData, 'activities' | 'weathers'>> {
  const fields = await listFields<PackerField>(event, packerTable(event))
  const options = (name: string) => (fields.find(field => field.name === name)?.select_options ?? []).map(option => option.value)
  return { activities: options('activity'), weathers: options('weather') }
}