import * as plugins from './smartnpm.plugins.js';
import { NpmRegistry } from './smartnpm.classes.npmregistry.js';
import { PackageDisttag } from './smartnpm.classes.packagedisttag.js';
import { PackageVersion, type IVersionData } from './smartnpm.classes.packageversion.js';

export class NpmPackage {
  public static async createFromFullMetadataAndVersionData(
    npmRegistryArg: NpmRegistry,
    fullMetadataArg: Record<string, unknown>,
    versionsDataArg: {
      name: string;
      'dist-tags': { [key: string]: string };
      versions: { [key: string]: IVersionData };
    }
  ) {
    const npmPackage = new NpmPackage(npmRegistryArg);
    Object.assign(npmPackage, fullMetadataArg);
    npmPackage.allVersions = [];
    npmPackage.allDistTags = [];
    for (const versionArg of Object.keys(versionsDataArg.versions)) {
      const packageVersion = PackageVersion.createFromVersionData(
        versionsDataArg.versions[versionArg]
      );
      npmPackage.allVersions.push(packageVersion);
    }
    for (const distTagArg of Object.keys(versionsDataArg['dist-tags'])) {
      const packageDistTag = new PackageDisttag(
        distTagArg,
        versionsDataArg['dist-tags'][distTagArg]
      );
      npmPackage.allDistTags.push(packageDistTag);
    }
    return npmPackage;
  }

  // INSTANCE
  public name: string | null = null;
  public scope: string | null = null;
  public version: string | null = null;
  public allVersions: PackageVersion[] = [];
  public allDistTags: PackageDisttag[] = [];
  public description: string | null = null;
  public keywords: string[] | null = null;
  public date!: string;
  public license!: string;
  public links!: {
    npm: string;
    homepage: string;
    repository: string;
    bugs: string;
  };
  public author!: {
    name: 'Lossless GmbH';
  };
  public publisher!: {
    username: 'gitzone';
    email: 'npm@git.zone';
  };
  public maintainers: unknown = null;
  public dist!: {
    integrity: string;
    shasum: string;
    tarball: string;
  };
  public score: {
    final: number;
    detail: {
      quality: number;
      popularity: number;
      maintenance: number;
    };
  } | null = null;
  public searchScore: number | null = null;

  public npmRegistryRef: NpmRegistry;
  constructor(npmRegistryArg: NpmRegistry) {
    this.npmRegistryRef = npmRegistryArg;
  }

  /**
   * saves the package to disk
   */
  public async saveToDisk(targetDir: string) {
    await plugins.smartarchive.SmartArchive.create().url(this.dist.tarball).extract(targetDir);
  }

  /**
   * saves the complete package to cache
   */
  public async saveToCache() {}

  /**
   * get files from package
   */
  public async getFilesFromPackage(
    filePath: string,
    optionsArg: {
      distTag?: string;
      version?: string;
    } = {},
    returnOnFirstArg = false
  ): Promise<plugins.smartfile.SmartFile[] | null> {
    let tarballUrl: string | undefined = this.dist?.tarball;
    if (optionsArg?.version || optionsArg?.distTag) {
      if (optionsArg.distTag && optionsArg.version) {
        throw new Error('Please either specify version OR disttag, not both.');
      }
      let targetVersionString: string | undefined;
      if (optionsArg.distTag) {
        const targetDistTag = this.allDistTags.find((distTag) => {
          return distTag.name === optionsArg.distTag;
        });
        if (targetDistTag) {
          targetVersionString = targetDistTag.targetVersion;
        }
      } else {
        targetVersionString = optionsArg.version;
      }
      if (!targetVersionString) {
        return null;
      }

      // lets find the best matching release
      const bestMatchingVersion = this.getBestMatchingVersion(targetVersionString);
      if (!bestMatchingVersion) {
        return null;
      }
      tarballUrl = this.allVersions.find(
        (packageVersion) => packageVersion.version === bestMatchingVersion
      )?.dist.tarball;
    }
    if (!tarballUrl) {
      return null;
    }
    const wantedFilePath = plugins.path.join('package', filePath);
    const allFiles = await plugins.smartarchive.SmartArchive.create().url(tarballUrl).toSmartFiles();
    const allMatchingFiles = allFiles.filter((fileArg) => {
      if (returnOnFirstArg) {
        return fileArg.path === wantedFilePath;
      }
      return fileArg.path.startsWith(wantedFilePath);
    });
    return returnOnFirstArg ? allMatchingFiles.slice(0, 1) : allMatchingFiles;
  }

  /**
   * get files from package
   */
  public async getFileFromPackage(
    filePath: string,
    optionsArg?: {
      distTag?: string;
      version?: string;
    }
  ): Promise<plugins.smartfile.SmartFile | null> {
    const result = await this.getFilesFromPackage(filePath, optionsArg, true);
    return result?.[0] || null;
  }

  /**
   * updates the package with information from the registry
   */
  update() {}

  /** */
  public getBestMatchingVersion(versionArg: string): string | null {
    // lets find the best matching release
    const targetVersion = plugins.smartversion.SmartVersion.fromFuzzyString(versionArg);
    const versionStrings = this.allVersions.map((packageVersion) => packageVersion.version);
    const bestMatchingVersion = targetVersion.getBestMatch(versionStrings);
    if (!bestMatchingVersion) {
      return null;
    }
    return bestMatchingVersion;
  }
}