import {z} from 'zod'

export type GetApiV2UpstepsArgs = {rim_diameter: number, rim_width: number, rim_offset: number, section_width: number, aspect_ratio: number, steps_min?: number | undefined, steps_max?: number | undefined, steps?: number | undefined, s_max?: number | undefined, do_max?: number | undefined};

export type GetApiV2UpstepsOptions = {baseUrl: string, userKey?: string | undefined, fetch?: typeof fetch | undefined};

export const tire = z.object({designation: z.string(), section_width: z.number().int(), aspect_ratio: z.number().int(), weight: z.number()});

export const rim = z.object({designation: z.string(), diameter: z.number(), width: z.number(), offset: z.number().int(), backspacing: z.number().int(), weight: z.number()});

export const difference = z.object({s_relative: z.number(), s_absolute: z.number(), do_relative: z.number(), do_absolute: z.number()});

export const upstepsData = z.object({tire: tire, rim: rim, is_oe: z.boolean(), step: z.number().int(), difference: difference});

export const diameterGroup = z.object({step: z.number().int(), count: z.number().int()});

export const upstepsMeta = z.object({count: z.number().int(), by_rim: z.record(z.string(), z.number().int()), by_diameter: z.record(z.string(), diameterGroup)});

export const upstepsReportOutput = z.object({data: z.array(upstepsData), meta: upstepsMeta});

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 alternative wheel and tire sizes derived from the OE size
 * 
 * GET /v2/upsteps/
 */
export const getApiV2Upsteps = async (args: GetApiV2UpstepsArgs, options: GetApiV2UpstepsOptions) => {
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.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.steps_min != null) query.append("steps_min", String(args.steps_min))
if (args.steps_max != null) query.append("steps_max", String(args.steps_max))
if (args.steps != null) query.append("steps", String(args.steps))
if (args.s_max != null) query.append("s_max", String(args.s_max))
if (args.do_max != null) query.append("do_max", String(args.do_max))
if (userKey !== undefined) query.set("user_key", userKey)

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