import {z} from 'zod'

export type GetApiV2SpecMetadataArgs = {rim_diameter?: number | undefined, rim_width?: number | undefined, rim_offset?: number | undefined, bolt_pattern?: string | undefined, cb?: number | undefined, section_width?: number | undefined, aspect_ratio?: number | undefined, overall_diameter?: number | undefined, hints?: boolean | undefined};

export type GetApiV2SpecMetadataOptions = {baseUrl: string, userKey?: string | undefined, fetch?: typeof fetch | undefined};

export const specMetadataOutput = z.object({mode: z.string()});

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 computed geometry, population stats, and hints for a wheel/tire spec
 * 
 * GET /v2/spec/metadata/
 */
export const getApiV2SpecMetadata = async (args: GetApiV2SpecMetadataArgs, options: GetApiV2SpecMetadataOptions) => {
const {baseUrl, fetch: fetchFn = fetch, userKey} = options ?? {}

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

if (args.rim_diameter != null) query.append("rim_diameter", String(args.rim_diameter))
if (args.rim_width != null) query.append("rim_width", String(args.rim_width))
if (args.rim_offset != null) query.append("rim_offset", String(args.rim_offset))
if (args.bolt_pattern != null) query.append("bolt_pattern", String(args.bolt_pattern))
if (args.cb != null) query.append("cb", String(args.cb))
if (args.section_width != null) query.append("section_width", String(args.section_width))
if (args.aspect_ratio != null) query.append("aspect_ratio", String(args.aspect_ratio))
if (args.overall_diameter != null) query.append("overall_diameter", String(args.overall_diameter))
if (args.hints != null) query.append("hints", String(args.hints))
if (userKey !== undefined) query.set("user_key", userKey)

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