import {z} from 'zod'

export type GetApiTowedRollingStockArgs = {page?: number | undefined, page_size?: number | undefined};

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

export const rollingResistancePerWeight = z.object({A: z.number(), B: z.number(), C: z.number(), type: z.string()});

export const towedRollingStock = z.object({comfort_acceleration: z.number(), const_gamma: z.number(), id: z.number().int(), inertia_coefficient: z.number(), label: z.string(), length: z.number(), locked: z.boolean(), mass: z.number(), max_speed: z.number().nullable().optional(), name: z.string(), railjson_version: z.string(), rolling_resistance: rollingResistancePerWeight, startup_acceleration: z.number(), version: z.number().int()});

export const getApiTowedRollingStockResponse = z.object({count: z.number().int().gte(0), current: z.number().int().gte(1), next: z.number().int().gte(1).nullable(), page_count: z.number().int().gte(0), page_size: z.number().int().gte(1), previous: z.number().int().gte(1).nullable(), results: z.array(towedRollingStock)});

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 /towed_rolling_stock
 */
export const getApiTowedRollingStock = async (args: GetApiTowedRollingStockArgs, options?: GetApiTowedRollingStockOptions) => {
const {baseUrl = "https://demo.osrd.fr/api", fetch: fetchFn = fetch} = options ?? {}

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

if (args.page != null) query.append("page", String(args.page))
if (args.page_size != null) query.append("page_size", String(args.page_size))

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