import {z} from 'zod'

export type GetApiV2QueryArgs = {vin: string, user: string, pass: string, format: 'json' | 'xml', skipspec?: (0 | 1) | undefined, mode?: 'test' | undefined, callback?: string | undefined};

export type GetApiV2QueryOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV2QueryResponse = z.object({id: z.string().optional(), vin: z.string().optional(), attributes: z.record(z.string(), z.unknown()).optional(), success: z.boolean().optional(), error: z.string().optional(), error_message: 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
};

/**
 * Vehicle History API -- query a VIN for records
 * 
 * GET /v2/query
 */
export const getApiV2Query = async (args: GetApiV2QueryArgs, options?: GetApiV2QueryOptions) => {
const {baseUrl = "https://api.vinaudit.com", fetch: fetchFn = fetch, apiKey} = 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.user != null) query.append("user", String(args.user))
if (args.pass != null) query.append("pass", String(args.pass))
if (args.format != null) query.append("format", String(args.format))
if (args.skipspec != null) query.append("skipspec", String(args.skipspec))
if (args.mode != null) query.append("mode", String(args.mode))
if (args.callback != null) query.append("callback", String(args.callback))
if (apiKey !== undefined) query.set("key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/query${query.size > 0 ? `?${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(getApiV2QueryResponse, await res.json())
};