import {z} from 'zod'

export type Address = {address_line1?: string | undefined, address_line2?: string | undefined, city?: string | undefined, state?: string | undefined, zip?: string | undefined, country?: string | undefined};

export type PhoneNumber = {country_code?: string | undefined, number?: string | undefined};

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

export type TokenData = {version?: string | undefined, data?: string | undefined, signature?: string | undefined, header?: Record<string, never> | undefined};

export type TokenRequest = {type: 'card', number: string, expiry_month: number, expiry_year: number, name?: string | undefined, cvv?: string | undefined, pin?: string | undefined, billing_address?: Address | undefined, phone?: PhoneNumber | undefined, metadata?: InstrumentMetadata | undefined} | {type: 'googlepay', token_data?: ({signature?: string | undefined, protocolVersion?: string | undefined, signedMessage?: string | undefined}) | undefined} | {type: 'applepay', token_data: TokenData} | {type: 'cvv', token_data: {cvv?: string | undefined}} | {type: 'pin', token_data: {pin?: string | undefined}};

export type CreateApiTokensArgs = {body: TokenRequest};

export type CreateApiTokensOptions = {baseUrl: string, ApiPublicKey?: string | undefined, fetch?: typeof fetch | undefined};

export const address = z.object({address_line1: z.string().max(200).optional(), address_line2: z.string().max(200).optional(), city: z.string().max(50).optional(), state: z.string().max(3).optional(), zip: z.string().max(50).optional(), country: z.string().min(2).max(2).optional()});

export const phoneNumber = z.object({country_code: z.string().min(1).max(7).optional(), number: z.string().max(25).optional()});

export const instrumentMetadata = z.record(z.string(), z.string().max(100));

export const tokenResponse = z.discriminatedUnion("type", [z.object({type: z.literal("card"), token: z.string(), expires_on: z.string(), billing_address: address.optional(), phone: phoneNumber.optional(), expiry_month: z.number().int().gte(1), expiry_year: z.number().int(), name: z.string().optional(), scheme: z.string(), scheme_local: z.literal("cartes_bancaires").optional(), last4: z.string().min(4).max(4), bin: z.string().max(6), card_type: z.enum(["CREDIT", "DEBIT", "PREPAID", "CHARGE", "DEFERRED DEBIT"]).optional(), card_category: z.enum(["CONSUMER", "COMMERCIAL"]).optional(), issuer: z.string().optional(), issuer_country: z.string().min(2).max(2).optional(), product_id: z.string().optional(), product_type: z.string().optional(), metadata: instrumentMetadata.optional()}), z.object({type: z.literal("googlepay"), token: z.string(), expires_on: z.string(), expiry_month: z.number().int().gte(1), expiry_year: z.number().int(), scheme: z.string(), scheme_local: z.literal("cartes_bancaires").optional(), last4: z.string(), bin: z.string(), card_type: z.enum(["CREDIT", "DEBIT", "PREPAID", "CHARGE", "DEFERRED DEBIT"]).optional(), card_category: z.enum(["CONSUMER", "COMMERCIAL"]).optional(), issuer: z.string().optional(), issuer_country: z.string().min(2).max(2).optional(), product_id: z.string().optional(), product_type: z.string().optional(), token_format: z.enum(["pan_only", "cryptogram_3ds"]).optional()}), z.object({type: z.literal("applepay"), token: z.string(), expires_on: z.string(), expiry_month: z.number().int().gte(1), expiry_year: z.number().int(), scheme: z.string(), scheme_local: z.literal("cartes_bancaires").optional(), last4: z.string(), bin: z.string(), card_type: z.enum(["CREDIT", "DEBIT", "PREPAID", "CHARGE", "DEFERRED DEBIT"]).optional(), card_category: z.enum(["CONSUMER", "COMMERCIAL"]).optional(), issuer: z.string().optional(), issuer_country: z.string().min(2).max(2).optional(), product_id: z.string().optional(), product_type: z.string().optional(), token_format: z.literal("cryptogram_3ds").optional()}), z.object({type: z.literal("cvv"), token: z.string(), expires_on: z.string(), expiry_month: z.number().int().gte(1).optional(), expiry_year: z.number().int().optional(), scheme: z.string().optional(), scheme_local: z.literal("cartes_bancaires").optional(), last4: z.string().optional(), bin: z.string().optional(), card_type: z.enum(["CREDIT", "DEBIT", "PREPAID", "CHARGE", "DEFERRED DEBIT"]).optional(), card_category: z.enum(["CONSUMER", "COMMERCIAL"]).optional(), issuer: z.string().optional(), issuer_country: z.string().min(2).max(2).optional(), product_id: z.string().optional(), product_type: z.string().optional()}), z.object({type: z.literal("pin"), token: z.string(), expires_on: z.string(), expiry_month: z.number().int().gte(1).optional(), expiry_year: z.number().int().optional(), scheme: z.string().optional(), scheme_local: z.literal("cartes_bancaires").optional(), last4: z.string().optional(), bin: z.string().optional(), card_type: z.enum(["CREDIT", "DEBIT", "PREPAID", "CHARGE", "DEFERRED DEBIT"]).optional(), card_category: z.enum(["CONSUMER", "COMMERCIAL"]).optional(), issuer: z.string().optional(), issuer_country: z.string().min(2).max(2).optional(), product_id: z.string().optional(), product_type: 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
};

/**
 * Request a token
 * 
 * POST /tokens
 */
export const createApiTokens = async (args: CreateApiTokensArgs, options: CreateApiTokensOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiPublicKey} = options ?? {}

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

if (ApiPublicKey !== undefined) headers.set("Authorization", ApiPublicKey)

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