import {z} from 'zod'

export type FetchResourcesOfdaBrazil = Array<'ACCOUNTS' | 'TRANSACTIONS' | 'OWNERS' | 'BILLS' | 'INVESTMENTS' | 'INVESTMENT_TRANSACTIONS' | 'EXCHANGES' | 'INCOMES' | 'RECURRING_EXPENSES' | 'RISK_INSIGHTS'>;

export type StaleIn = string;

export type WidgetTokenRequestBankingBrazil = {id: string, password: string, scopes: string, fetch_resources: FetchResourcesOfdaBrazil, stale_in: StaleIn, widget: {openfinance_feature: string, callback_urls: {success: string, exit: string, event: string}, branding: {company_icon: string, company_logo: string, company_name: string, company_terms_url: string, overlay_background_color?: string | undefined, social_proof?: boolean | undefined, show_belvo_middle_logo?: boolean | undefined}, theme?: Array<{css_key: string, value: string}> | undefined, consent: {purpose: string, terms_and_conditions_url: string, permissions: Array<'REGISTER' | 'ACCOUNTS' | 'CREDIT_CARDS' | 'CREDIT_OPERATIONS'>, identification_info: Array<{type: string, number: string, name: string}>, default_consent_duration_days?: number | undefined}}};

export type FetchResourcesEmploymentBrazil = Array<'EMPLOYMENTS' | 'OWNERS'>;

export type CredentialsStorage = string;

export type WidgetTokenRequestEmploymentBrazil = {id: string, password: string, scopes: string, fetch_resources: FetchResourcesEmploymentBrazil, stale_in: StaleIn, credentials_storage?: CredentialsStorage | undefined, widget: {callback_urls?: {success: string, exit: string, event: string} | undefined, branding: {company_icon: string, company_logo: string, company_name: string, company_terms_url: string, company_terms_version?: string | undefined, overlay_background_color?: string | undefined, social_proof?: boolean | undefined}, theme?: Array<{css_key: string, value: string}> | undefined}};

export type FetchResourcesEmploymentMexico = Array<'EMPLOYMENT_RECORDS' | 'CURRENT_EMPLOYMENTS' | 'EMPLOYMENT_METRICS'>;

export type WidgetTokenRequestEmploymentMexico = {id: string, password: string, scopes: string, fetch_resources: FetchResourcesEmploymentMexico, stale_in: StaleIn, credentials_storage?: CredentialsStorage | undefined, widget: {callback_urls?: {success: string, exit: string, event: string} | undefined, branding: {company_icon: string, company_logo: string, company_name: string, company_terms_url: string, company_terms_version?: string | undefined, overlay_background_color?: string | undefined, social_proof?: boolean | undefined}, theme?: Array<{css_key: string, value: string}> | undefined}};

export type FetchResourcesFiscalMexico = Array<'FINANCIAL_STATEMENTS' | 'INVOICES' | 'TAX_COMPLIANCE_STATUS' | 'TAX_RETENTIONS' | 'TAX_RETURNS' | 'TAX_STATUS'>;

export type WidgetTokenRequestFiscalMexico = {id: string, password: string, scopes: string, fetch_resources: FetchResourcesFiscalMexico, stale_in: StaleIn, credentials_storage?: CredentialsStorage | undefined, widget: {callback_urls?: {success: string, exit: string, event: string} | undefined, branding: {company_icon: string, company_logo: string, company_name: string, company_terms_url: string, company_terms_version?: string | undefined, overlay_background_color?: string | undefined, social_proof?: boolean | undefined}, theme?: Array<{css_key: string, value: string}> | undefined}};

export type CreateApiApiTokenArgs = {body: WidgetTokenRequestBankingBrazil | WidgetTokenRequestEmploymentBrazil | WidgetTokenRequestEmploymentMexico | WidgetTokenRequestFiscalMexico};

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

export const widgetToken = z.object({access: z.string().optional(), refresh: z.string().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
};

/**
 * Generate a widget access token
 * 
 * POST /api/token/
 */
export const createApiApiToken = async (args: CreateApiApiTokenArgs, options?: CreateApiApiTokenOptions) => {
const {baseUrl = "https://sandbox.belvo.com", 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 (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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