import { Ajv as _Ajv } from 'ajv';
import addFormats from 'ajv-formats';

export type addFormatsType = (ajv: _Ajv) => void;

// Singleton Ajv instance
export type AjvType = typeof _Ajv & { addFormats: addFormatsType };

export const Ajv: AjvType =
    (globalThis as { Ajv?: AjvType })?.Ajv ||
    (() => {
        const __Ajv = _Ajv;
        (__Ajv as unknown as AjvType).addFormats = addFormats as unknown as addFormatsType;
        return __Ajv as AjvType;
    })();

export const ajv = new Ajv({
    allErrors: true,
    allowUnionTypes: true,
});

Ajv.addFormats(ajv);