import {z} from 'zod'

export type GetApiV6TaxesSetupOptions = {baseUrl?: string | undefined, EmbedToken?: string | undefined, fetch?: typeof fetch | undefined};

export const filingStatusSetup = z.object({federal: z.enum(["SINGLE", "MARRIED", "MARRIED_SEPARATELY", "HEAD", "WIDOWER"]).optional(), state: z.enum(["SINGLE", "MARRIED", "MARRIED_SEPARATELY", "HEAD", "WIDOWER"]).optional()});

export const withholding = z.object({useWithholding: z.boolean().optional(), federalWithholding: z.number().int().optional(), stateWithholding: z.number().int().optional()});

export const homeOffice = z.object({useHomeOfficeDeduction: z.boolean().optional(), homeOfficeArea: z.number().optional()});

export const mileage = z.object({useEstimate: z.boolean().optional(), estimate: z.number().int().optional(), useMileageDeduction: z.boolean().optional(), vehicleBusinessPercent: z.string().optional()});

export const expenses = z.object({useEstimate: z.boolean().optional(), estimate: z.number().int().optional()});

export const income = z.object({useEstimate: z.boolean().optional(), estimate: z.number().int().optional()});

export const taxSetupGetDto = z.object({countryCode: z.string().nullable(), state: z.string().nullable(), filingStatus: filingStatusSetup, annualW2Income: z.number().int().nullable(), withholding: withholding, numExemptions: z.number().int().nullable(), tipIncome: z.number().int().nullable(), overtimeIncome: z.number().int().nullable(), homeOffice: homeOffice, mileage: mileage, expenses: expenses, income: income, isSetupComplete: z.boolean().nullable()});

export const successResponseTaxSetupGetDto = z.object({result: z.enum(["SUCCESS", "FAILURE"]).optional(), data: taxSetupGetDto.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
};

/**
 * Get tax profile
 * 
 * GET /v6/taxes/setup
 */
export const getApiV6TaxesSetup = async (options?: GetApiV6TaxesSetupOptions) => {
const {baseUrl = "https://sandbox.tight.com", fetch: fetchFn = fetch, EmbedToken} = options ?? {}

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

if (EmbedToken !== undefined) headers.set('authorization', `Bearer ${EmbedToken}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v6/taxes/setup${query.size > 0 ? `?${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(successResponseTaxSetupGetDto, await res.json())
};