import {z} from 'zod'

export type GetApiV1LoyaltyProgramsOptions = {baseUrl?: string | undefined, managerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const codeGeneratorSettings = z.object({validCharacters: z.array(z.string()), couponPattern: z.string().min(3).max(100)});

export const loyaltyTier = z.object({id: z.number().int(), created: z.string(), programID: z.number().int(), programName: z.string().optional(), programTitle: z.string().optional(), name: z.string(), minPoints: z.number().gte(0).lte(999999999999.99)});

export const loyaltyProgram = z.object({id: z.number().int(), created: z.string(), title: z.string(), description: z.string(), subscribedApplications: z.array(z.number().int()), defaultValidity: z.string(), defaultPending: z.string(), allowSubledger: z.boolean(), usersPerCardLimit: z.number().int().gte(0).optional(), sandbox: z.boolean(), programJoinPolicy: z.enum(["not_join", "points_activated", "points_earned"]).optional(), tiersExpirationPolicy: z.enum(["tier_start_date", "program_join_date", "customer_attribute", "absolute_expiration"]).optional(), tierCycleStartDate: z.string().optional(), tiersExpireIn: z.string().optional(), tiersDowngradePolicy: z.enum(["one_down", "balance_based"]).optional(), cardCodeSettings: codeGeneratorSettings.optional(), returnPolicy: z.enum(["only_pending", "within_balance", "unlimited"]).optional(), accountID: z.number().int(), name: z.string(), tiers: z.array(loyaltyTier).optional(), timezone: z.string().min(1), cardBased: z.boolean(), canUpdateTiers: z.boolean().optional(), canUpdateTierExpirationPolicy: z.boolean().optional(), canUpgradeToAdvancedTiers: z.boolean().optional(), canUpdateSubledgers: z.boolean().optional()});

export const getApiV1LoyaltyProgramsResponse = z.object({totalResultSize: z.number().int(), data: z.array(loyaltyProgram)});

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 loyalty programs
 * 
 * GET /v1/loyalty_programs
 * 
 * Also accepts auth: management_key
 */
export const getApiV1LoyaltyPrograms = async (options?: GetApiV1LoyaltyProgramsOptions) => {
const {baseUrl = "https://yourbaseurl.talon.one", fetch: fetchFn = fetch, managerAuth} = options ?? {}

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

if (managerAuth !== undefined) headers.set("Authorization", managerAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/loyalty_programs${query.size > 0 ? `?${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(getApiV1LoyaltyProgramsResponse, await res.json())
};