import {z} from 'zod'

export type GetApiV1IdArgs = {id: string, auditUser: string};

export type GetApiV1IdOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const currency = z.string();

export const money = z.object({amount: z.number().optional(), currency: currency.optional()});

export const keyValuePair = z.object({key: z.string().max(64), value: z.string().max(64)});

export const vATValues = z.object({percentage: z.number().optional(), amount: money.optional()});

export const fuelPurchaseDetailResponse = z.object({amount: money.optional(), code: z.string().max(64).optional(), description: z.string().max(255).optional(), externalId: z.string().max(64).optional(), matchingAttributes: z.array(keyValuePair).optional(), promptedData: z.array(keyValuePair).optional(), quantity: z.number().optional(), transactionId: z.string().max(64).optional(), type: z.enum(["FUEL", "OTHER"]).optional(), unitPrice: z.number().optional(), VAT: vATValues.optional(), unit: z.enum(["KG", "KWH", "LITRE", "GALLON"]).optional(), id: z.string().optional()});

export const otherPurchaseDetailResponse = z.object({amount: money.optional(), code: z.string().max(64).optional(), description: z.string().max(255).optional(), externalId: z.string().max(64).optional(), matchingAttributes: z.array(keyValuePair).optional(), promptedData: z.array(keyValuePair).optional(), quantity: z.number().optional(), transactionId: z.string().max(64).optional(), type: z.enum(["FUEL", "OTHER"]).optional(), unitPrice: z.number().optional(), VAT: vATValues.optional(), unit: z.enum(["KG", "KWH", "LITRE", "GALLON"]).optional(), id: z.string().optional()});

export const getApiV1IdResponse = z.union([fuelPurchaseDetailResponse, otherPurchaseDetailResponse]);

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
};

/**
 * Retrieve one purchase detail
 * 
 * GET /v1/{id}
 */
export const getApiV1Id = async (args: GetApiV1IdArgs, options: GetApiV1IdOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.auditUser != null) query.append("auditUser", String(args.auditUser))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/${encodeURIComponent(String(args.id))}${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(getApiV1IdResponse, await res.json())
};