import type { Db } from '../db';
import { MongoInvalidArgumentError, MongoRuntimeError } from '../error';
import type { Server } from '../sdam/server';
import type { ClientSession } from '../sessions';
import type { Callback } from '../utils';
import { enumToString } from '../utils';
import { CommandOperation, CommandOperationOptions } from './command';

const levelValues = new Set(['off', 'slow_only', 'all']);

/** @public */
export const ProfilingLevel = Object.freeze({
  off: 'off',
  slowOnly: 'slow_only',
  all: 'all'
} as const);

/** @public */
export type ProfilingLevel = typeof ProfilingLevel[keyof typeof ProfilingLevel];

/** @public */
export type SetProfilingLevelOptions = CommandOperationOptions;

/** @internal */
export class SetProfilingLevelOperation extends CommandOperation<ProfilingLevel> {
  override options: SetProfilingLevelOptions;
  level: ProfilingLevel;
  profile: 0 | 1 | 2;

  constructor(db: Db, level: ProfilingLevel, options: SetProfilingLevelOptions) {
    super(db, options);
    this.options = options;
    switch (level) {
      case ProfilingLevel.off:
        this.profile = 0;
        break;
      case ProfilingLevel.slowOnly:
        this.profile = 1;
        break;
      case ProfilingLevel.all:
        this.profile = 2;
        break;
      default:
        this.profile = 0;
        break;
    }

    this.level = level;
  }

  override execute(
    server: Server,
    session: ClientSession | undefined,
    callback: Callback<ProfilingLevel>
  ): void {
    const level = this.level;

    if (!levelValues.has(level)) {
      return callback(
        new MongoInvalidArgumentError(
          `Profiling level must be one of "${enumToString(ProfilingLevel)}"`
        )
      );
    }

    // TODO(NODE-3483): Determine error to put here
    super.executeCommand(server, session, { profile: this.profile }, (err, doc) => {
      if (err == null && doc.ok === 1) return callback(undefined, level);
      return err != null
        ? callback(err)
        : callback(new MongoRuntimeError('Error with profile command'));
    });
  }
}