/**
 * Package model for Stack.Gallery Registry
 */

import * as plugins from '../plugins.ts';
import type {
  IPackage,
  IPackageVersion,
  IProtocolMetadata,
} from '../interfaces/package.interfaces.ts';
import type { TRegistryProtocol } from '../interfaces/auth.interfaces.ts';
import { db } from './db.ts';

@plugins.smartdata.Collection(() => db)
export class Package extends plugins.smartdata.SmartDataDbDoc<Package, Package> implements IPackage {
  @plugins.smartdata.unI()
  public id: string = ''; // {protocol}:{org}:{name}

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public organizationId: string = '';

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public repositoryId: string = '';

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public protocol: TRegistryProtocol = 'npm';

  @plugins.smartdata.svDb()
  @plugins.smartdata.searchable()
  @plugins.smartdata.index()
  public name: string = '';

  @plugins.smartdata.svDb()
  @plugins.smartdata.searchable()
  public description?: string;

  @plugins.smartdata.svDb()
  public versions: Record<string, IPackageVersion> = {};

  @plugins.smartdata.svDb()
  public distTags: Record<string, string> = {}; // e.g., { latest: "1.0.0" }

  @plugins.smartdata.svDb()
  public metadata: IProtocolMetadata = { type: 'npm' };

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public isPrivate: boolean = true;

  @plugins.smartdata.svDb()
  public storageBytes: number = 0;

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public downloadCount: number = 0;

  @plugins.smartdata.svDb()
  public starCount: number = 0;

  @plugins.smartdata.svDb()
  public cacheExpiresAt?: Date;

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public createdAt: Date = new Date();

  @plugins.smartdata.svDb()
  public updatedAt: Date = new Date();

  @plugins.smartdata.svDb()
  @plugins.smartdata.index()
  public createdById: string = '';

  /**
   * Generate package ID
   */
  public static generateId(protocol: TRegistryProtocol, orgName: string, name: string): string {
    return `${protocol}:${orgName}:${name}`;
  }

  /**
   * Find package by ID
   */
  public static async findById(id: string): Promise<Package | null> {
    return await Package.getInstance({ id });
  }

  /**
   * Find package by protocol, org, and name
   */
  public static async findByName(
    protocol: TRegistryProtocol,
    orgName: string,
    name: string
  ): Promise<Package | null> {
    const id = Package.generateId(protocol, orgName, name);
    return await Package.findById(id);
  }

  /**
   * Get packages in an organization
   */
  public static async getOrgPackages(organizationId: string): Promise<Package[]> {
    return await Package.getInstances({ organizationId });
  }

  /**
   * Search packages
   */
  public static async search(
    query: string,
    options?: {
      protocol?: TRegistryProtocol;
      organizationId?: string;
      isPrivate?: boolean;
      limit?: number;
      offset?: number;
    }
  ): Promise<Package[]> {
    const filter: Record<string, unknown> = {};
    if (options?.protocol) filter.protocol = options.protocol;
    if (options?.organizationId) filter.organizationId = options.organizationId;
    if (options?.isPrivate !== undefined) filter.isPrivate = options.isPrivate;

    // Simple text search - in production, would use MongoDB text index
    const allPackages = await Package.getInstances(filter);

    // Filter by query
    const lowerQuery = query.toLowerCase();
    const filtered = allPackages.filter(
      (pkg) =>
        pkg.name.toLowerCase().includes(lowerQuery) ||
        pkg.description?.toLowerCase().includes(lowerQuery)
    );

    // Apply pagination
    const offset = options?.offset || 0;
    const limit = options?.limit || 50;
    return filtered.slice(offset, offset + limit);
  }

  /**
   * Add a new version
   */
  public addVersion(version: IPackageVersion): void {
    this.versions[version.version] = version;
    this.storageBytes += version.size;
    this.updatedAt = new Date();
  }

  /**
   * Get specific version
   */
  public getVersion(version: string): IPackageVersion | undefined {
    return this.versions[version];
  }

  /**
   * Get latest version
   */
  public getLatestVersion(): IPackageVersion | undefined {
    const latest = this.distTags['latest'];
    if (latest) {
      return this.versions[latest];
    }
    // Fallback to most recent
    const versionList = Object.keys(this.versions);
    if (versionList.length === 0) return undefined;
    return this.versions[versionList[versionList.length - 1]];
  }

  /**
   * Increment download count
   */
  public async incrementDownloads(version?: string): Promise<void> {
    this.downloadCount += 1;
    if (version && this.versions[version]) {
      this.versions[version].downloads += 1;
    }
    await this.save();
  }

  /**
   * Lifecycle hook
   */
  public async beforeSave(): Promise<void> {
    this.updatedAt = new Date();
    if (!this.id) {
      this.id = await Package.getNewId();
    }
  }
}