import {z} from 'zod'

export type GetApiRestAccountsArgs = {'filter[person.id]'?: string | undefined, 'filter[account_type]'?: ('EARNINGS_BALANCE' | 'DEPOSITORY' | 'CARD') | undefined, 'filter[subtype]'?: string | undefined, filter?: string | undefined};

export type GetApiRestAccountsOptions = {baseUrl?: string | undefined, oauthClientCredentialsToken?: string | undefined, fetch?: typeof fetch | undefined};

export const currency = z.string();

export const transferDestinationCapability = z.object({schedule: z.enum(["WITHIN_THIRTY_MINUTES", "NEXT_BUSINESS_DAY"]), fee: z.number().int(), currency: currency});

export const accountAttributes = z.union([z.object({verification_status: z.enum(["VERIFICATION_PENDING", "VERIFICATION_FAILED", "VERIFIED"]), balances: z.object({available: z.number().int().gte(0).nullable(), current: z.number().int().gte(0).nullable(), currency: z.string()}), capabilities: z.object({transfer_destination: z.array(transferDestinationCapability)}), name: z.string(), account_type: z.literal("CARD"), subtype: z.enum(["DEBIT", "DAILYPAY"]), details: z.object({last_four: z.string(), issuer: z.string(), first_name: z.string(), last_name: z.string(), expiration_month: z.string(), expiration_year: z.string()})}), z.object({verification_status: z.enum(["VERIFICATION_PENDING", "VERIFICATION_FAILED", "VERIFIED"]), balances: z.object({available: z.number().int().gte(0).nullable(), current: z.number().int().gte(0).nullable(), currency: z.string()}), capabilities: z.object({transfer_destination: z.array(transferDestinationCapability)}), name: z.string(), account_type: z.literal("EARNINGS_BALANCE"), subtype: z.literal("ODP"), details: z.object({})}), z.object({verification_status: z.enum(["VERIFICATION_PENDING", "VERIFICATION_FAILED", "VERIFIED"]), balances: z.object({available: z.number().int().gte(0).nullable(), current: z.number().int().gte(0).nullable(), currency: z.string()}), capabilities: z.object({transfer_destination: z.array(transferDestinationCapability)}), name: z.string(), account_type: z.literal("DEPOSITORY"), subtype: z.enum(["SAVINGS", "CHECKING"]), details: z.object({first_name: z.string(), last_name: z.string(), routing_number: z.string(), account_number: z.string()})})]);

export const accountLink = z.string();

export const accountLinks = z.object({self: accountLink});

export const personIdentifier = z.object({type: z.literal("people"), id: z.string()});

export const personRelationship = z.object({data: personIdentifier});

export const accountRelationships = z.object({person: personRelationship});

export const accountResource = z.object({id: z.string(), type: z.literal("accounts"), attributes: accountAttributes, links: accountLinks, relationships: accountRelationships});

export const accountsData = z.object({data: z.array(accountResource)});

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
};

/**
 * Get a list of Account objects
 * 
 * GET /rest/accounts
 * 
 * Also accepts auth: oauth_user_token
 */
export const getApiRestAccounts = async (args: GetApiRestAccountsArgs, options?: GetApiRestAccountsOptions) => {
const {baseUrl = "https://api.dailypay.com", fetch: fetchFn = fetch, oauthClientCredentialsToken} = options ?? {}

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

if (args['filter[person.id]'] != null) query.append("filter[person.id]", String(args['filter[person.id]']))
if (args['filter[account_type]'] != null) query.append("filter[account_type]", String(args['filter[account_type]']))
if (args['filter[subtype]'] != null) query.append("filter[subtype]", String(args['filter[subtype]']))
if (args.filter != null) query.append("filter", String(args.filter))
if (oauthClientCredentialsToken !== undefined) headers.set('authorization', `Bearer ${oauthClientCredentialsToken}`)

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