import {z} from 'zod'

export type InvoiceCreateInput = {merchant_id: string, period_start: string, period_end: string, currency: string, notes?: (string | null) | undefined};

export type CreateApiApiV1AdminInvoicesArgs = {body: InvoiceCreateInput};

export type CreateApiApiV1AdminInvoicesOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const invoiceResponse = z.object({success: z.boolean(), data: z.object({id: z.string(), invoice_number: z.string(), payment_reference: z.string(), merchant_id: z.string(), status: z.union([z.literal("draft"), z.literal("issued"), z.literal("paid"), z.literal("void")]), currency: z.string().min(3).max(3), period_start: z.string(), period_end: z.string(), total_amount: z.string(), amount_paid: z.string(), outstanding_amount: z.string(), transaction_count: z.number(), due_date: z.string().nullable(), issued_at: z.string().nullable(), issued_by_user_id: z.string().nullable(), paid_at: z.string().nullable(), voided_at: z.string().nullable(), voided_reason: z.string().nullable(), voided_by_user_id: z.string().nullable(), notes: z.string().nullable(), created_by_user_id: z.string().nullable(), created_at: z.string(), updated_at: z.string(), payments: z.array(z.object({id: z.string(), amount: z.string(), currency: z.string().min(3).max(3), payment_method: z.union([z.literal("manual_bank_transfer"), z.literal("immediately_settled"), z.literal("issue_credit")]), external_reference: z.string().nullable(), paid_at: z.string(), recorded_by_user_id: z.string().nullable(), recorded_at: z.string(), notes: z.string().nullable()})), fx_rates: z.array(z.object({source_currency: z.string().min(3).max(3), rate: z.string(), captured_at: z.string(), fetched_at: z.string().nullable(), provider: z.string()}))})});

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 draft invoice for a merchant over a (period, currency) window. Claims eligible transactions atomically; pre-settled fees produce an immediately_settled payment row.
 * 
 * POST /api/v1/admin/invoices
 */
export const createApiApiV1AdminInvoices = async (args: CreateApiApiV1AdminInvoicesArgs, options?: CreateApiApiV1AdminInvoicesOptions) => {
const {baseUrl = "https://core.quidkey.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/admin/invoices${query.size > 0 ? `?${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(invoiceResponse, await res.json())
};