import {z} from 'zod'

export type Notes = {[key: string]: string};

export type CreateApiTransfersArgs = {'X-Transfer-Idempotency'?: string | undefined, body: {account: string, amount: number, currency: 'INR', notes?: Notes | undefined, linked_account_notes?: Array<string> | undefined, on_hold?: boolean | undefined, on_hold_until?: number | undefined}};

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

export const notes = z.record(z.string(), z.string());

export const transfer = z.object({id: z.string().optional(), entity: z.literal("transfer").optional(), source: z.string().optional(), recipient: z.string().optional(), amount: z.number().int().optional(), currency: z.literal("INR").optional(), amount_reversed: z.number().int().optional(), fees: z.number().int().optional(), tax: z.number().int().optional(), transfer_status: z.enum(["created", "pending", "processed", "failed", "reversed", "partially_reversed"]).optional(), settlement_status: z.enum(["pending", "on_hold", "settled"]).optional(), on_hold: z.boolean().optional(), on_hold_until: z.number().int().optional(), recipient_settlement_id: z.string().optional(), notes: notes.optional(), linked_account_notes: z.array(z.string()).optional(), created_at: z.number().int().optional(), processed_at: z.number().int().optional()});

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
};

/**
 * Create a direct transfer
 * 
 * POST /transfers
 * 
 * Also accepts auth: oauth2
 */
export const createApiTransfers = async (args: CreateApiTransfersArgs, options?: CreateApiTransfersOptions) => {
const {baseUrl = "https://api.razorpay.com/v1", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args['X-Transfer-Idempotency'] != null) headers.set("X-Transfer-Idempotency", String(args['X-Transfer-Idempotency']))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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