import {z} from 'zod'

export type GetApiSettlementsArgs = {start_time?: string | undefined, end_time?: string | undefined, per_page?: number | undefined, page?: number | undefined};

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

export const uUID = z.string().min(25).max(25);

export const status = z.enum(["pending", "paid", "cancelled", "bounced", "suspended"]);

export const cents = z.number().int();

export const currency = z.enum(["JPY", "USD", "EUR", "TWD", "KRW", "PLN", "GBP", "HKD", "SGD", "NZD", "AUD", "IDR", "MYR", "PHP", "THB", "CNY", "BRL", "CHF", "CAD", "VND"]);

export const settlement = z.object({id: uUID, resource: z.literal("settlement"), reference: z.string(), status: status, merchant_name: z.string(), company_name: z.string().nullable(), cycle: z.string(), transaction_amount_cents: cents, currency: currency, fee_amount_cents: cents, fee_tax_amount_cents: cents, settlement_amount_cents: cents, fx_currency: currency, fx_conversion_rate: z.string(), fx_conversion_amount_cents: cents, bank_transfer_fee_amount_cents: cents, remittance_amount_cents: cents, cutoff_time: z.string(), created_at: z.string(), download: z.object({csv: z.string().nullable(), xls: z.string().nullable()})});

export const settlementList = z.object({resource: z.string(), data: z.array(settlement), start_time: z.string(), end_time: z.string(), total: z.number().int(), page: z.number().int(), per_page: z.number().int(), last_page: z.number().int()});

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
};

/**
 * Settlement: Index
 * 
 * GET /settlements
 */
export const getApiSettlements = async (args: GetApiSettlementsArgs, options?: GetApiSettlementsOptions) => {
const {baseUrl = "https://komoju.com/api/v1", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.start_time != null) query.append("start_time", String(args.start_time))
if (args.end_time != null) query.append("end_time", String(args.end_time))
if (args.per_page != null) query.append("per_page", String(args.per_page))
if (args.page != null) query.append("page", String(args.page))
if (apiKey !== undefined) headers.set('authorization', `Basic ${btoa(`${apiKey.username}:${apiKey.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/settlements${query.size > 0 ? `?${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(settlementList, await res.json())
};