//
// Copyright 2022 Vulcanize, Inc.
//

import yargs from 'yargs';
import { hideBin } from 'yargs/helpers';
import 'reflect-metadata';
import assert from 'assert';
import { ConnectionOptions } from 'typeorm';

import { JsonRpcProvider } from '@ethersproject/providers';
import {
  DEFAULT_CONFIG_PATH,
  JobQueue,
  DatabaseInterface,
  IndexerInterface,
  ServerConfig,
  Clients,
  JobRunner,
  GraphWatcherInterface,
  startMetricsServer,
  Config
} from '@cerc-io/util';

import { BaseCmd } from './base';

interface Arguments {
  configFile: string;
}

export class JobRunnerCmd {
  _argv?: Arguments
  _baseCmd: BaseCmd;

  constructor () {
    this._baseCmd = new BaseCmd();
  }

  get config (): Config | undefined {
    return this._baseCmd.config;
  }

  get clients (): Clients | undefined {
    return this._baseCmd.clients;
  }

  get ethProvider (): JsonRpcProvider | undefined {
    return this._baseCmd.ethProvider;
  }

  get database (): DatabaseInterface | undefined {
    return this._baseCmd.database;
  }

  get jobQueue (): JobQueue | undefined {
    return this._baseCmd.jobQueue;
  }

  get indexer (): IndexerInterface | undefined {
    return this._baseCmd.indexer;
  }

  async initConfig<ConfigType> (): Promise<ConfigType> {
    this._argv = this._getArgv();
    assert(this._argv);

    return this._baseCmd.initConfig(this._argv.configFile);
  }

  async init (
    Database: new (
      config: ConnectionOptions,
      serverConfig?: ServerConfig
    ) => DatabaseInterface,
    clients: { [key: string]: any } = {}
  ): Promise<void> {
    await this.initConfig();

    await this._baseCmd.init(Database, clients);
  }

  async initIndexer (
    Indexer: new (
      serverConfig: ServerConfig,
      db: DatabaseInterface,
      clients: Clients,
      ethProvider: JsonRpcProvider,
      jobQueue: JobQueue,
      graphWatcher?: GraphWatcherInterface
    ) => IndexerInterface,
    graphWatcher?: GraphWatcherInterface
  ): Promise<void> {
    return this._baseCmd.initIndexer(Indexer, graphWatcher);
  }

  async exec (startJobRunner: (jobRunner: JobRunner) => Promise<void>): Promise<void> {
    const config = this._baseCmd.config;
    const jobQueue = this._baseCmd.jobQueue;
    const indexer = this._baseCmd.indexer;

    assert(config);
    assert(jobQueue);
    assert(indexer);

    if (indexer.addContracts) {
      await indexer.addContracts();
    }

    const jobRunner = new JobRunner(config.jobQueue, indexer, jobQueue);

    await jobRunner.jobQueue.deleteAllJobs();
    await jobRunner.resetToPrevIndexedBlock();

    await startJobRunner(jobRunner);
    jobRunner.handleShutdown();

    await startMetricsServer(config, indexer);
  }

  _getArgv (): any {
    return yargs(hideBin(process.argv))
      .option('f', {
        alias: 'config-file',
        demandOption: true,
        describe: 'configuration file path (toml)',
        type: 'string',
        default: DEFAULT_CONFIG_PATH
      })
      .argv;
  }
}