import {z} from 'zod'

export type GetApiTrainersArgs = {favorite_gym_name: string, store_name: string, training_start_at?: string | undefined, training_end_at?: string | undefined, budget?: number | undefined, training_menu_typ?: number | undefined};

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

export const trainer = z.object({trainer_id: z.string().optional(), trainer_name: z.string().optional(), unit_price: z.number().int().optional(), business_start_at: z.string().optional(), business_end_at: z.string().optional(), public_mail_addr: z.string().optional(), public_tel: z.string().optional(), store_name: z.string().optional(), gym_name: z.string().optional(), star_count: z.number().optional()});

export const trainers = z.object({count: z.number().int().optional(), items: z.array(trainer).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
};

/**
 * API007 パーソナルトレーナー検索
 * 
 * GET /trainers
 */
export const getApiTrainers = async (args: GetApiTrainersArgs, options: GetApiTrainersOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.favorite_gym_name != null) query.append("favorite_gym_name", String(args.favorite_gym_name))
if (args.store_name != null) query.append("store_name", String(args.store_name))
if (args.training_start_at != null) query.append("training_start_at", String(args.training_start_at))
if (args.training_end_at != null) query.append("training_end_at", String(args.training_end_at))
if (args.budget != null) query.append("budget", String(args.budget))
if (args.training_menu_typ != null) query.append("training_menu_typ", String(args.training_menu_typ))

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