import {z} from 'zod'

export type GetApiApiCustomersArgs = {page?: number | undefined, limit?: number | undefined, search?: string | undefined, country?: string | undefined, currency?: string | undefined, sortBy?: string | undefined, sortOrder?: ('asc' | 'desc') | undefined};

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

export const customerResponse = z.object({id: z.string(), externalId: z.string(), email: z.string(), name: z.string().optional(), country: z.string().optional(), currency: z.string(), metadata: z.record(z.string(), z.unknown()).optional(), createdAt: z.string(), updatedAt: z.string()});

export const paginationMeta = z.object({total: z.number(), page: z.number(), limit: z.number(), totalPages: z.number()});

export const paginatedCustomerResponse = z.object({data: z.array(customerResponse), meta: paginationMeta});

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
};

/**
 * List customers
 * 
 * GET /api/customers
 */
export const getApiApiCustomers = async (args: GetApiApiCustomersArgs, options?: GetApiApiCustomersOptions) => {
const {baseUrl = "https://api.novabilling.one", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.page != null) query.append("page", String(args.page))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.search != null) query.append("search", String(args.search))
if (args.country != null) query.append("country", String(args.country))
if (args.currency != null) query.append("currency", String(args.currency))
if (args.sortBy != null) query.append("sortBy", String(args.sortBy))
if (args.sortOrder != null) query.append("sortOrder", String(args.sortOrder))
if (apiKey !== undefined) headers.set("Authorization", apiKey)

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