import {z} from 'zod'

export type GetApiSpecsArgs = {vin: string, format?: ('json' | 'xml') | undefined, deepdata?: '1' | undefined, disableIntVINDecoding?: '1' | undefined};

export type GetApiSpecsOptions = {baseUrl?: string | undefined, ApiKeyQuery?: string | undefined, fetch?: typeof fetch | undefined};

export const specsResponse = z.object({success: z.boolean().optional(), input: z.record(z.string(), z.unknown()).optional(), timestamp: z.string().optional(), attributes: z.record(z.string(), z.unknown()).optional(), colors: z.array(z.object({category: z.string().optional(), name: z.string().optional()}).and(z.record(z.string(), z.unknown()))).optional(), equipment: z.record(z.string(), z.unknown()).optional(), warranties: z.array(z.object({type: z.string().optional(), miles: z.string().optional(), months: z.string().optional()}).and(z.record(z.string(), z.unknown()))).optional(), deepdata: z.record(z.string(), z.unknown()).optional()}).and(z.record(z.string(), z.unknown()));

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
};

/**
 * Vehicle Specifications (VIN decoder)
 * 
 * GET /specs
 * 
 * Also accepts auth: X402Payment
 */
export const getApiSpecs = async (args: GetApiSpecsArgs, options?: GetApiSpecsOptions) => {
const {baseUrl = "https://api.carsxe.com", fetch: fetchFn = fetch, ApiKeyQuery} = options ?? {}

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

if (args.vin != null) query.append("vin", String(args.vin))
if (args.format != null) query.append("format", String(args.format))
if (args.deepdata != null) query.append("deepdata", String(args.deepdata))
if (args.disableIntVINDecoding != null) query.append("disableIntVINDecoding", String(args.disableIntVINDecoding))
if (ApiKeyQuery !== undefined) query.set("key", ApiKeyQuery)

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