import path from 'path';

import { schema, StrykerOptions } from '@stryker-mutator/api/core';
import { Logger } from '@stryker-mutator/api/logging';
import { commonTokens, tokens } from '@stryker-mutator/api/plugin';
import { Reporter } from '@stryker-mutator/api/report';
import { pathToFileURL } from 'url';
import { reporterUtil } from './reporter-util.js';

const INDENTION_LEVEL = 0;
export const RESOURCES_DIR_NAME = 'strykerResources';

export class JsonReporter implements Reporter {
  private mainPromise: Promise<void> | undefined;

  constructor(
    private readonly options: StrykerOptions,
    private readonly log: Logger,
  ) {}

  public static readonly inject = tokens(
    commonTokens.options,
    commonTokens.logger,
  );

  public onMutationTestReportReady(report: schema.MutationTestResult): void {
    this.mainPromise = this.generateReport(report);
  }

  public wrapUp(): Promise<void> | undefined {
    return this.mainPromise;
  }

  private async generateReport(report: schema.MutationTestResult) {
    const filePath = path.normalize(this.options.jsonReporter.fileName);
    this.log.debug(`Using relative path ${filePath}`);
    await reporterUtil.writeFile(
      path.resolve(filePath),
      JSON.stringify(report, null, INDENTION_LEVEL),
    );
    this.log.info(
      `Your report can be found at: ${pathToFileURL(filePath).href}`,
    );
  }
}