import {z} from 'zod'

export type Reference = string;

export type ApplicantRequest = {email: string, first_name?: string | undefined, last_name?: string | undefined};

export type BusinessLegalStructure = 'ca_private_corp' | 'ca_public_corp' | 'ca_non_profit';

export type BaseRegistrationNumber = {type: string, value: string};

export type GermanRegistrationNumber = {type: string, value: string, registry: string};

export type RegistrationNumber = BaseRegistrationNumber | GermanRegistrationNumber;

export type BusinessRequest = {legal_name: string, country: unknown, legal_structure?: BusinessLegalStructure | undefined, registered_address?: ({line1: string, line2?: string | undefined, street_number: string, city: string, region?: string | undefined, postal_code: string}) | undefined, registration_number?: RegistrationNumber | undefined};

export type TimeSpan = unknown;

export type ApplicationWebhooksRequest = {url: string};

export type OnboardingApplicationRequest = {type: 'onboarding' | 'change_request', reference: Reference, applicant: ApplicantRequest, business: BusinessRequest, redirect: {default: string}, expires_in?: TimeSpan | undefined, webhooks?: ApplicationWebhooksRequest | undefined};

export type AccountId = string;

export type ApplicationFieldRequest = {name: 'themes', access: 'read_write'};

export type ChangeRequestApplicationRequest = {type: 'onboarding' | 'change_request', account: {id: AccountId}, reference: Reference, fields: Array<ApplicationFieldRequest>, redirect?: {default: string} | undefined, theme_id?: string | undefined, expires_in?: TimeSpan | undefined, webhooks?: ApplicationWebhooksRequest | undefined};

export type CreateApplicationRequest = OnboardingApplicationRequest | ChangeRequestApplicationRequest;

export type CreateApiV2ApplicationsArgs = {'Getpaid-Idempotency-Key': string, body: CreateApplicationRequest};

export type CreateApiV2ApplicationsOptions = {baseUrl?: string | undefined, OAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const applicationId = z.string().min(30).max(50);

export const applicationStatus = z.enum(["initiated", "identity_verified", "submitted", "screened", "approved", "completed", "cancelled", "expired"]);

export const reference = z.string().min(1).max(50);

export const createdAt = z.string().min(24).max(24);

export const updatedAt = z.string().min(24).max(24);

export const applicationExpiresAt = z.string().min(24).max(24);

export const accountId = z.string().min(30).max(50);

export const dateTime = z.string().min(24).max(24);

export const applicationFlow = z.object({next_step: z.object({type: z.literal("redirect"), url: z.string().max(1024), expires_at: dateTime.optional()})});

export const createApplicationResponse = z.object({id: applicationId, status: applicationStatus, reference: reference, created_at: createdAt, updated_at: updatedAt, expires_at: applicationExpiresAt, account: z.object({id: accountId}), flow: applicationFlow});

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 an application
 * 
 * POST /v2/applications
 */
export const createApiV2Applications = async (args: CreateApiV2ApplicationsArgs, options?: CreateApiV2ApplicationsOptions) => {
const {baseUrl = "https://api.getpaid.io", fetch: fetchFn = fetch, OAuth} = options ?? {}

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

if (args['Getpaid-Idempotency-Key'] != null) headers.set("Getpaid-Idempotency-Key", String(args['Getpaid-Idempotency-Key']))
if (OAuth !== undefined) headers.set('authorization', `Bearer ${OAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/applications${query.size > 0 ? `?${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(createApplicationResponse, await res.json())
};