import {z} from 'zod'

export type GetApiV2PoItemsArgs = {pos?: string | undefined, items?: string | undefined, numbers?: string | undefined, cursor?: number | undefined, limit?: number | undefined, lastEditedStart?: number | undefined, lastEditedEnd?: number | undefined};

export type GetApiV2PoItemsOptions = {baseUrl: string, BasicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const pOItem = z.object({poID: z.number().int().optional(), poItemID: z.number().int().optional(), itemType: z.number().int().optional(), name: z.unknown(), description: z.unknown(), glID: z.number().int().optional(), partID: z.number().int().optional(), taskID: z.number().int().optional(), poNumber: z.number().int().optional(), qty: z.number().int().optional(), rate: z.number().int().optional(), tax: z.number().int().optional(), discount: z.number().int().optional(), shipping: z.number().int().optional(), qtyReceived: z.number().int().optional(), orderUnitAbbreviation: z.unknown(), lastEdited: z.number().int().optional(), meta: z.object({po: z.string().optional()}).optional()});

export const getApiV2PoItemsResponse = z.array(pOItem);

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get Purchase Order Items
 * 
 * GET /v2/po/items
 */
export const getApiV2PoItems = async (args: GetApiV2PoItemsArgs, options: GetApiV2PoItemsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BasicAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.pos != null) query.append("pos", String(args.pos))
if (args.items != null) query.append("items", String(args.items))
if (args.numbers != null) query.append("numbers", String(args.numbers))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.lastEditedStart != null) query.append("lastEditedStart", String(args.lastEditedStart))
if (args.lastEditedEnd != null) query.append("lastEditedEnd", String(args.lastEditedEnd))
if (BasicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${BasicAuth.username}:${BasicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/po/items${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiV2PoItemsResponse, await res.json())
};