import type { Fr } from '@aztec/foundation/curves/bn254';
import { BufferReader, FieldReader, serializeToBuffer, serializeToFields } from '@aztec/foundation/serialize';
import type { FieldsOf } from '@aztec/foundation/types';

import { inspect } from 'util';

import { PublicCallStackItemCompressed } from './public_call_stack_item_compressed.js';

// TO BE REMOVED
/**
 * Represents a request to call a public function.
 */
export class PublicInnerCallRequest {
  constructor(
    public item: PublicCallStackItemCompressed,
    /**
     * The counter for this call request.
     */
    public counter: number,
  ) {}

  getSize() {
    return this.isEmpty() ? 0 : this.toBuffer().length;
  }

  /**
   * Serialize this as a buffer.
   * @returns The buffer.
   */
  toBuffer() {
    return serializeToBuffer(this.item, this.counter);
  }

  /**
   * Deserialize this from a buffer.
   * @param buffer - The bufferable type from which to deserialize.
   * @returns The deserialized instance of PublicInnerCallRequest.
   */
  static fromBuffer(buffer: Buffer | BufferReader) {
    const reader = BufferReader.asReader(buffer);
    return new PublicInnerCallRequest(PublicCallStackItemCompressed.fromBuffer(reader), reader.readNumber());
  }

  /**
   * Create PublicInnerCallRequest from a fields dictionary.
   * @param fields - The dictionary.
   * @returns A PublicInnerCallRequest object.
   */
  static from(fields: FieldsOf<PublicInnerCallRequest>): PublicInnerCallRequest {
    return new PublicInnerCallRequest(...PublicInnerCallRequest.getFields(fields));
  }

  /**
   * Serialize into a field array. Low-level utility.
   * @param fields - Object with fields.
   * @returns The array.
   */
  static getFields(fields: FieldsOf<PublicInnerCallRequest>) {
    return [fields.item, fields.counter] as const;
  }

  toFields(): Fr[] {
    return serializeToFields([this.item, this.counter]);
  }

  static fromFields(fields: Fr[] | FieldReader): PublicInnerCallRequest {
    const reader = FieldReader.asReader(fields);
    return new PublicInnerCallRequest(PublicCallStackItemCompressed.fromFields(reader), reader.readU32());
  }

  static empty() {
    return new PublicInnerCallRequest(PublicCallStackItemCompressed.empty(), 0);
  }

  isEmpty(): boolean {
    return this.item.isEmpty() && this.counter == 0;
  }

  [inspect.custom]() {
    return `PublicInnerCallRequest {
      item: ${this.item.toFields()}
      counter: ${this.counter}
    }`;
  }
}