import ProcessExecutor from "../util/ProcessExecutor.js";
import BenchmarkInstance from "./BenchmarkInstance.js";

/**
 * Represents a set of BenchmarkInstances.
 *
 * @param name - The name of this benchmark set.
 *
 * @deprecated Use javascript's builtin Set instead to build a set of BenchmarkInstances (e.g. new Set<BenchmarkInstance>()).
 */
export default abstract class BenchmarkSet {
  private _name: string;
  private compilationEngineProvider:
    | Parameters<BenchmarkInstance["setCompilationEngine"]>[0]
    | undefined = undefined;

  constructor(name: string) {
    this._name = name;
  }

  getName() {
    return this._name;
  }

  setCompilationEngine(
    compilationEngineProviderFunction: Parameters<
      BenchmarkInstance["setCompilationEngine"]
    >[0]
  ) {
    // Set provider
    this.compilationEngineProvider = compilationEngineProviderFunction;
  }

  /**
   * Generator function that automatically handles loading/closing BenchmarkInstances.
   */
  *[Symbol.iterator]() {
    const benchmarks = this.getInstances();
    for (const benchmark of benchmarks) {
      // Load
      benchmark.load();

      // Return
      yield benchmark;

      // Close
      benchmark.close();
    }
  }

  /**
   * Instances of benchmarks, according to the current configuration.
   *
   * @returns An array of BenchmarkInstance.
   */
  getInstances(): BenchmarkInstance[] {
    const instances = this._getInstancesPrivate();

    // If custom BenchmarkCompilationEngine provider, set all instances
    if (this.compilationEngineProvider !== undefined) {
      for (const instance of instances) {
        instance.setCompilationEngine(this.compilationEngineProvider);
      }
    }

    return instances;
  }

  /**
   * Test the current benchmark set.
   *
   * @param worker - Function with no parameters that will be called after loading the bencharmk code as AST.
   * @param executeCode - If true, executes the code after worker is applied.
   * @param outputProcessor - If execution is enabled, will be called after execution with the corresponding ProcessExecutor.
   *
   * @returns An array with the names of benchmarks that finished with problemas, or an empty array if everything was fine.
   */
  test(
    worker: Parameters<BenchmarkInstance["test"]>[0] = (
      // eslint-disable-next-line @typescript-eslint/no-unused-vars
      _instance: BenchmarkInstance
    ) => {
      return true;
    },
    executeCode: Parameters<BenchmarkInstance["test"]>[1] = false,
    outputProcessor: Parameters<BenchmarkInstance["test"]>[2] = (
      // eslint-disable-next-line @typescript-eslint/no-unused-vars
      _executor: ProcessExecutor
    ) => {}
  ): string[] {
    const benchesWithProblems: string[] = [];

    for (const bench of this) {
      const success = bench.test(worker, executeCode, outputProcessor);

      if (!success) {
        benchesWithProblems.push(bench.getName());
      }
    }

    return benchesWithProblems;
  }

  protected abstract _getInstancesPrivate(): BenchmarkInstance[];
}