import {z} from 'zod'

export type GetApiV2CheckoutRatesConfigIdOptions = {baseUrl?: string | undefined, apiKeys?: string | undefined, fetch?: typeof fetch | undefined};

export const checkoutRatesServiceSelection = z.object({carrier_id: z.string(), service_code: z.string().min(1)});

export const checkoutRatesOptionResponseBody = z.object({option_id: z.number().int().optional(), config_id: z.string().optional(), name: z.string().optional(), type: z.enum(["live_rate", "flat_rate", "free", "local_delivery"]).optional(), services: z.array(checkoutRatesServiceSelection).optional(), fee_mode: z.enum(["add", "subtract"]).optional(), fee_percentage: z.number().optional(), sort_index: z.number().int().optional(), fallback_mode: z.enum(["dont_show", "flat_rate", "cart_percentage"]).optional(), fallback_rate_amount: z.number().optional(), fallback_rate_currency: z.string().optional(), fallback_percentage: z.number().optional(), amount: z.number().optional(), currency: z.string().optional(), is_active: z.boolean().optional(), created_at: z.string().optional()});

export const weightUnit = z.enum(["pound", "ounce", "gram", "kilogram"]);

export const weight = z.object({value: z.number().gt(0), unit: weightUnit});

export const dimensionUnit = z.enum(["inch", "centimeter"]);

export const dimensions = z.object({unit: dimensionUnit, length: z.number().gte(0), width: z.number().gte(0), height: z.number().gte(0)});

export const checkoutRatesDimensionsByWeight = z.object({max_weight: weight.optional(), default_dimensions: dimensions.optional()});

export const checkoutRatesSharedSettings = z.object({calculation_method: z.enum(["by_volume", "skip_dimensions"]).optional(), dimensions_by_weight: z.array(checkoutRatesDimensionsByWeight).optional()});

export const checkoutRatesConfigResponseBody = z.object({config_id: z.string().optional(), options: z.array(checkoutRatesOptionResponseBody).optional(), shared_settings: checkoutRatesSharedSettings.optional(), created_at: z.string().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
};

/**
 * Get a checkout rates configuration
 * 
 * GET /v2/checkout_rates/{config_id}
 */
export const getApiV2CheckoutRatesConfigId = async (options?: GetApiV2CheckoutRatesConfigIdOptions) => {
const {baseUrl = "https://api.shipstation.com", fetch: fetchFn = fetch, apiKeys} = options ?? {}

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

if (apiKeys !== undefined) headers.set("api-key", apiKeys)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/checkout_rates/${encodeURIComponent(String(args.config_id))}${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(checkoutRatesConfigResponseBody, await res.json())
};