import {z} from 'zod'

export type GetApiBuilderRulesArgs = {filter?: string | undefined};

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

export const parameter = z.object({default: z.string().optional(), name: z.string().optional(), type: z.string().optional(), start: z.number().optional(), stop: z.number().optional(), step: z.number().optional()});

export const rule = z.object({guid: z.string().optional(), category: z.string().optional(), description: z.string().optional(), name: z.string().optional(), parameters: z.array(parameter).optional(), ruletype: z.string().optional(), validor: z.number().int().optional(), validnot: z.number().int().optional()});

export const getApiBuilderRulesResponse = z.array(rule);

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 strategy builder rules list
 * 
 * GET /builder/rules
 */
export const getApiBuilderRules = async (args: GetApiBuilderRulesArgs, options?: GetApiBuilderRulesOptions) => {
const {baseUrl = "https://api.tradematic.com", fetch: fetchFn = fetch, Secured} = options ?? {}

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

if (args.filter != null) query.append("filter", String(args.filter))
if (Secured !== undefined) headers.set("X-API-Key", Secured)

const url = `${baseUrl.replace(/\/+$/, '')}/builder/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(getApiBuilderRulesResponse, await res.json())
};