import { Program, Provider } from '@project-serum/anchor';
import {
  IdlInstruction,
  IdlType,
  IdlTypeDef,
  IdlTypeDefTyStruct,
} from '@project-serum/anchor/dist/cjs/idl';
import { PublicKey } from '@solana/web3.js';
import { isRegExp } from 'util';
import { MangoV4, IDL } from './mango_v4';

export const MANGO_V4_ID = new PublicKey(
  'm43thNJ58XCjL798ZSq6JGAG1BnWskhdq5or6kcnfsD',
);

// Attempt at stripping the type itself
// type MangoV4Stripped = Pick<
//   MangoV4,
//   'version' | 'name' | 'accounts' | 'types' | 'errors'
// > & {
//   instructions: Pick<
//     // This is create group, would have been nice if we could use a filtered list of literals
//     // based on ix name
//     MangoV4['instructions'][0],
//     'name' | 'accounts' | 'args'
//   >[];
// };

export class MangoClient {
  constructor(public program: Program<MangoV4>, public devnet?: boolean) {}

  static async connect(
    provider: Provider,
    devnet?: boolean,
  ): Promise<MangoClient> {
    // alternatively we could fetch from chain
    // const idl = await Program.fetchIdl(MANGO_V$_ID, provider);
    let idl = IDL;

    // temporarily patch  missing types, so we can do new Program(...) below
    MangoClient.addDummyType(idl, 'usize');
    MangoClient.addDummyType(idl, 'AnyNode');
    MangoClient.addDummyType(idl, 'EventQueueHeader');
    MangoClient.addDummyType(idl, 'AnyEvent');
    MangoClient.addDummyType(idl, 'instructions::NewOrderInstructionData');
    MangoClient.addDummyType(idl, 'instructions::CancelOrderInstructionData');
    MangoClient.addDummyType(idl, 'H');
    MangoClient.addDummyType(idl, 'H::Item');
    MangoClient.addDummyType(idl, 'NodeHandle');

    return new MangoClient(
      new Program<MangoV4>(idl as MangoV4, MANGO_V4_ID, provider),
      devnet,
    );
  }

  private static addDummyType(idl: MangoV4, typeName: string) {
    (idl.types as any).push({
      name: typeName,
      type: {
        kind: 'struct',
        fields: [
          {
            name: 'val',
            type: 'u64',
          },
        ],
      },
    });
  }
}