import {z} from 'zod'

export type GetApiAlertsKpisArgs = {TENANT: string, 'API-KEY': string, last_n_days?: number | undefined, timezone: string};

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

export const callKPI = z.object({numberOutgoing: z.number().int().nullable().optional(), numberIncoming: z.number().int().nullable().optional(), numberHandled: z.number().int().nullable().optional(), numberNotifications: z.number().int().nullable().optional(), percentGrowth: z.number().nullable().optional()});

export const schedulingKPI = z.object({numberAppointmentsScheduled: z.number().int().nullable().optional(), numberAppointmentsCompleted: z.number().int().nullable().optional(), numberNotifications: z.number().int().nullable().optional(), percentGrowth: z.number().nullable().optional()});

export const intakeKPI = z.object({numberFormsSubmitted: z.number().int().nullable().optional(), numberFormResponsesMissingPast: z.number().int().nullable().optional(), numberFormResponsesMissingUpcoming: z.number().int().nullable().optional(), numberNotifications: z.number().int().nullable().optional(), percentGrowth: z.number().nullable().optional()});

export const alertKPIs = z.object({calls: callKPI, scheduling: schedulingKPI, intake: intakeKPI});

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 Kpis
 * 
 * GET /alerts/kpis
 */
export const getApiAlertsKpis = async (args: GetApiAlertsKpisArgs, options: GetApiAlertsKpisOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.TENANT != null) headers.set("TENANT", String(args.TENANT))
if (args['API-KEY'] != null) headers.set("API-KEY", String(args['API-KEY']))
if (args.last_n_days != null) query.append("last_n_days", String(args.last_n_days))
if (args.timezone != null) query.append("timezone", String(args.timezone))

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