import {z} from 'zod'

export type GetApiNumerologyExpressionNumberArgs = {first_name: string, middle_name?: string | undefined, last_name: string};

export type GetApiNumerologyExpressionNumberOptions = {baseUrl?: string | undefined, oauth2?: string | undefined, fetch?: typeof fetch | undefined};

export const numerologyNumber = z.object({name: z.string(), number: z.number().int().nullable(), description: z.string()});

export const numerologyChartValue = z.object({character: z.string(), number: z.number().int()});

export const numerologyChart = z.object({first_name: z.array(numerologyChartValue), middle_name: z.array(numerologyChartValue), last_name: z.array(numerologyChartValue)});

export const expressionNumber = z.object({expression_number: numerologyNumber, name_chart: numerologyChart});

export const expressionNumberResponse = z.object({status: z.string(), data: expressionNumber});

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
};

/**
 * Expression Number
 * 
 * GET /numerology/expression-number
 */
export const getApiNumerologyExpressionNumber = async (args: GetApiNumerologyExpressionNumberArgs, options?: GetApiNumerologyExpressionNumberOptions) => {
const {baseUrl = "https://api.prokerala.com/v2", fetch: fetchFn = fetch, oauth2} = options ?? {}

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

if (args.first_name != null) query.append("first_name", String(args.first_name))
if (args.middle_name != null) query.append("middle_name", String(args.middle_name))
if (args.last_name != null) query.append("last_name", String(args.last_name))
if (oauth2 !== undefined) headers.set('authorization', `Bearer ${oauth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/numerology/expression-number${query.size > 0 ? `?${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(expressionNumberResponse, await res.json())
};