import {z} from 'zod'

export type GetApiV3ExercisesArgs = {samples?: boolean | undefined, zones?: boolean | undefined, route?: boolean | undefined};

export type GetApiV3ExercisesOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const heartRate = z.object({average: z.number().int().optional(), maximum: z.number().int().optional()});

export const zone = z.object({index: z.number().int().optional(), "lower-limit": z.number().int().optional(), "upper-limit": z.number().int().optional(), "in-zone": z.string().optional()});

export const sample = z.object({"recording-rate": z.number().int().optional(), "sample-type": z.string().optional(), data: z.string().optional()});

export const location = z.object({latitude: z.number().optional(), longitude: z.number().optional(), time: z.string().optional(), satellites: z.number().int().optional(), fix: z.number().int().optional()});

export const trainingLoadProLoadEnum = z.enum(["UNKNOWN", "VERY_LOW", "LOW", "MEDIUM", "HIGH", "VERY_HIGH", "NOT_AVAILABLE"]);

export const trainingLoadProRpeEnum = z.enum(["UNKNOWN", "RPE_NONE", "RPE_EASY", "RPE_LIGHT", "RPE_FAIRLY_BRISK", "RPE_BRISK", "RPE_MODERATE", "RPE_FAIRLY_HARD", "RPE_HARD", "RPE_EXHAUSTING", "RPE_EXTREME"]);

export const trainingLoadProSample = z.object({date: z.string().optional(), "cardio-load": z.number().optional(), "muscle-load": z.number().optional(), "perceived-load": z.number().optional(), "cardio-load-interpretation": trainingLoadProLoadEnum.optional(), "muscle-load-interpretation": trainingLoadProLoadEnum.optional(), "perceived-load-interpretation": trainingLoadProLoadEnum.optional(), "user-rpe": trainingLoadProRpeEnum.optional()});

export const exerciseHashId = z.object({id: z.string().optional(), upload_time: z.string().optional(), polar_user: z.string().optional(), device: z.string().optional(), device_id: z.string().optional(), start_time: z.string().optional(), start_time_utc_offset: z.number().int().optional(), duration: z.string().optional(), calories: z.number().int().optional(), distance: z.number().optional(), heart_rate: heartRate.optional(), training_load: z.number().optional(), sport: z.string().optional(), has_route: z.boolean().optional(), club_id: z.number().int().optional(), club_name: z.string().optional(), detailed_sport_info: z.string().optional(), fat_percentage: z.number().int().optional(), carbohydrate_percentage: z.number().int().optional(), protein_percentage: z.number().int().optional(), "running-index": z.number().int().optional(), heart_rate_zones: z.array(zone).optional(), samples: z.array(sample).optional(), route: z.array(location).optional(), training_load_pro: trainingLoadProSample.optional()});

export const exercisesHashId = z.array(exerciseHashId);

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
};

/**
 * List exercises
 * 
 * GET /v3/exercises
 */
export const getApiV3Exercises = async (args: GetApiV3ExercisesArgs, options?: GetApiV3ExercisesOptions) => {
const {baseUrl = "https://www.polaraccesslink.com", fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (args.samples != null) query.append("samples", String(args.samples))
if (args.zones != null) query.append("zones", String(args.zones))
if (args.route != null) query.append("route", String(args.route))
if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v3/exercises${query.size > 0 ? `?${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(exercisesHashId, await res.json())
};