import * as plugins from './smartversion.plugins.js';

export class SmartVersion {
  public static fromFuzzyString(fuzzyString: string): SmartVersion {
    return new SmartVersion(plugins.semver.minVersion(fuzzyString).version, fuzzyString);
  }

  public originalVersionString: string;
  public semver: plugins.semver.SemVer;
  public get versionString(): string {
    return this.semver.version;
  };

  constructor(semVerStringArg: string, originalStringArg?: string) {
    this.originalVersionString = originalStringArg;
    this.semver = new plugins.semver.SemVer(semVerStringArg);
  }

  public get major() {
    return this.semver.major;
  }

  public get minor() {
    return this.semver.minor;
  }

  public get patch() {
    return this.semver.patch;
  }

  public greaterThan(smartVersionArg: SmartVersion) {
    return this.greaterThanString(smartVersionArg.versionString);
  }

  /**
   * compares the version of this against a string
   */
  public greaterThanString(versionStringArg: string) {
    return plugins.semver.gt(this.versionString, versionStringArg);
  }

  public lessThan(smartVersionArg: SmartVersion) {
    return this.lessThanString(smartVersionArg.versionString);
  }

  /**
   * compares the version of this against a string
   */
  public lessThanString(versionStringArg: string) {
    return plugins.semver.lt(this.versionString, versionStringArg);
  }

  /**
   * tries to get the best match from a range of available versions
   */
  public getBestMatch(availableVersions: string[]): string {
    let bestMatchingVersion: string;
    for (const versionArg of availableVersions) {
      if (!plugins.semver.satisfies(versionArg, this.originalVersionString)) {
        continue;
      }
      if(!bestMatchingVersion) {
        bestMatchingVersion = versionArg;
      } else {
        if (plugins.semver.lt(bestMatchingVersion, versionArg)) {
          bestMatchingVersion = versionArg;
        }
      }
    }
    return bestMatchingVersion;
  }

  public getNewPatchVersion() {
    const newInstance = new SmartVersion(`${this.semver.major}.${this.semver.minor}.${this.semver.patch + 1}`);
    return newInstance;
  }

  public getNewMinorVersion() {
    const newInstance = new SmartVersion(`${this.semver.major}.${this.semver.minor + 1}.${0}`);
    return newInstance;
  }

  public getNewMajorVersion() {
    const newInstance = new SmartVersion(`${this.semver.major + 1}.${0}.${0}`);
    return newInstance;
  }

  public getNewVersion(typeArg: 'patch' | 'minor' | 'major') {
    switch (typeArg) {
      case 'patch':
        return this.getNewPatchVersion();
      case 'minor':
        return this.getNewMinorVersion();
      case 'major':
        return this.getNewMajorVersion();
      default:
        throw new Error('unknown new version type.');
    }
  }
}