import {z} from 'zod'

export type IssuingTargetId = string;

export type GetApiIssuingControlsArgs = {target_id: IssuingTargetId};

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

export const issuingControlId = z.string().min(30).max(30);

export const issuingTargetId = z.string().min(30).max(30);

export const issuingControlType = z.enum(["velocity_limit", "mcc_limit", "mid_limit"]);

export const controlIsEditable = z.boolean();

export const datetime = z.string();

export const velocityWindow = z.object({type: z.enum(["daily", "weekly", "monthly", "all_time"])});

export const velocityLimitWithRemainingAmount = z.object({amount_remaining: z.number().int().gte(0), amount_limit: z.number().int().gte(0), velocity_window: velocityWindow, mcc_list: z.array(z.string()).optional(), mid_list: z.array(z.string()).optional()});

export const mccLimit = z.object({type: z.enum(["allow", "block"]), mcc_list: z.array(z.string())});

export const midCode = z.string().min(1).max(15);

export const midLimit = z.object({type: z.enum(["allow", "block"]), mid_list: z.array(midCode)});

export const getControlResponse = z.discriminatedUnion("control_type", [z.object({id: issuingControlId, target_id: issuingTargetId, description: z.string().max(256), control_type: issuingControlType, is_editable: controlIsEditable, created_date: datetime, last_modified_date: datetime, velocity_limit: velocityLimitWithRemainingAmount}), z.object({id: issuingControlId, target_id: issuingTargetId, description: z.string().max(256), control_type: issuingControlType, is_editable: controlIsEditable, created_date: datetime, last_modified_date: datetime, mcc_limit: mccLimit}), z.object({id: issuingControlId, target_id: issuingTargetId, description: z.string().max(256), control_type: issuingControlType, is_editable: controlIsEditable, created_date: datetime, last_modified_date: datetime, mid_limit: midLimit})]);

export const getControlsArrayResponse = z.object({controls: z.array(getControlResponse)});

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 controls by target
 * 
 * GET /issuing/controls
 */
export const getApiIssuingControls = async (args: GetApiIssuingControlsArgs, options: GetApiIssuingControlsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth} = options ?? {}

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

if (args.target_id != null) query.append("target_id", String(args.target_id))
if (OAuth !== undefined) headers.set('authorization', `Bearer ${OAuth}`)

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