import {z} from 'zod'

export type KeysetSeek = 'BEFORE' | 'AFTER';

export type InventoryRuleKeyset = {seek?: (KeysetSeek | null) | undefined, size?: (number | null) | undefined, ruleId?: (number | null) | undefined, endDate?: (string | null) | undefined};

export type GetApiInventoryRulesArgs = {productId: number, withDemand?: (boolean | null) | undefined, keyset: InventoryRuleKeyset};

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

export const keysetSeek = z.enum(["BEFORE", "AFTER"]);

export const inventoryRuleKeyset = z.object({seek: keysetSeek.nullable().optional(), size: z.number().int().gte(0).lte(50).nullable().optional(), ruleId: z.number().int().nullable().optional(), endDate: z.string().nullable().optional()});

export const keysetPageObjectInventoryRuleKeyset = z.object({data: z.array(z.object({})), previousKeyset: inventoryRuleKeyset.nullable(), nextKeyset: inventoryRuleKeyset.nullable()});

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 /inventory-rules
 */
export const getApiInventoryRules = async (args: GetApiInventoryRulesArgs, options: GetApiInventoryRulesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.productId != null) query.append("productId", String(args.productId))
if (args.withDemand != null) query.append("withDemand", String(args.withDemand))
if (args.keyset != null) query.append("keyset", JSON.stringify(args.keyset))

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