/**
 * IStorageHooks implementation for smartregistry
 * Integrates Stack.Gallery's storage with smartregistry
 */

import * as plugins from '../plugins.ts';
import type { TRegistryProtocol } from '../interfaces/auth.interfaces.ts';
import { Package } from '../models/package.ts';
import { Organization } from '../models/organization.ts';
import { AuditService } from '../services/audit.service.ts';

export interface IStorageProviderConfig {
  bucket: plugins.smartbucket.SmartBucket;
  bucketName: string;
  basePath: string;
}

/**
 * Storage hooks implementation that tracks packages in MongoDB
 * and stores artifacts in S3 via smartbucket
 */
export class StackGalleryStorageHooks implements plugins.smartregistry.IStorageHooks {
  private config: IStorageProviderConfig;

  constructor(config: IStorageProviderConfig) {
    this.config = config;
  }

  /**
   * Called before a package is stored
   */
  public async beforePut(
    context: plugins.smartregistry.IStorageHookContext
  ): Promise<plugins.smartregistry.IBeforePutResult> {
    // Validate organization exists and has quota
    const orgId = context.actor?.orgId;
    if (orgId) {
      const org = await Organization.findById(orgId);
      if (!org) {
        return { allowed: false, reason: `Organization not found: ${orgId}` };
      }

      // Check storage quota
      const newSize = context.metadata?.size || 0;
      if (!org.hasStorageAvailable(newSize)) {
        return { allowed: false, reason: 'Organization storage quota exceeded' };
      }
    }

    return { allowed: true };
  }

  /**
   * Called after a package is successfully stored
   */
  public async afterPut(
    context: plugins.smartregistry.IStorageHookContext
  ): Promise<void> {
    const protocol = context.protocol as TRegistryProtocol;
    const packageName = context.metadata?.packageName || context.key;
    const version = context.metadata?.version || 'unknown';
    const orgId = context.actor?.orgId || '';

    const packageId = Package.generateId(protocol, orgId, packageName);

    // Get or create package record
    let pkg = await Package.findById(packageId);
    if (!pkg) {
      pkg = new Package();
      pkg.id = packageId;
      pkg.organizationId = orgId;
      pkg.protocol = protocol;
      pkg.name = packageName;
      pkg.createdById = context.actor?.userId || '';
      pkg.createdAt = new Date();
    }

    // Add version
    pkg.addVersion({
      version,
      publishedAt: new Date(),
      publishedById: context.actor?.userId || '',
      size: context.metadata?.size || 0,
      digest: context.metadata?.digest,
      downloads: 0,
      metadata: {},
    });

    // Set latest tag if not set
    if (!pkg.distTags['latest']) {
      pkg.distTags['latest'] = version;
    }

    await pkg.save();

    // Update organization storage usage
    if (orgId) {
      const org = await Organization.findById(orgId);
      if (org) {
        await org.updateStorageUsage(context.metadata?.size || 0);
      }
    }

    // Audit log
    if (context.actor?.userId) {
      await AuditService.withContext({
        actorId: context.actor.userId,
        actorType: 'user',
        organizationId: orgId,
      }).logPackagePublished(packageId, packageName, version, orgId, '');
    }
  }

  /**
   * Called after a package is fetched
   */
  public async afterGet(
    context: plugins.smartregistry.IStorageHookContext
  ): Promise<void> {
    const protocol = context.protocol as TRegistryProtocol;
    const packageName = context.metadata?.packageName || context.key;
    const version = context.metadata?.version;
    const orgId = context.actor?.orgId || '';

    const packageId = Package.generateId(protocol, orgId, packageName);

    const pkg = await Package.findById(packageId);
    if (pkg) {
      await pkg.incrementDownloads(version);
    }
  }

  /**
   * Called before a package is deleted
   */
  public async beforeDelete(
    context: plugins.smartregistry.IStorageHookContext
  ): Promise<plugins.smartregistry.IBeforeDeleteResult> {
    return { allowed: true };
  }

  /**
   * Called after a package is deleted
   */
  public async afterDelete(
    context: plugins.smartregistry.IStorageHookContext
  ): Promise<void> {
    const protocol = context.protocol as TRegistryProtocol;
    const packageName = context.metadata?.packageName || context.key;
    const version = context.metadata?.version;
    const orgId = context.actor?.orgId || '';

    const packageId = Package.generateId(protocol, orgId, packageName);

    const pkg = await Package.findById(packageId);
    if (!pkg) return;

    if (version) {
      const versionData = pkg.versions[version];
      if (versionData) {
        const sizeReduction = versionData.size;
        delete pkg.versions[version];
        pkg.storageBytes -= sizeReduction;

        for (const [tag, ver] of Object.entries(pkg.distTags)) {
          if (ver === version) {
            delete pkg.distTags[tag];
          }
        }

        if (Object.keys(pkg.versions).length === 0) {
          await pkg.delete();
        } else {
          await pkg.save();
        }

        if (orgId) {
          const org = await Organization.findById(orgId);
          if (org) {
            await org.updateStorageUsage(-sizeReduction);
          }
        }
      }
    } else {
      const sizeReduction = pkg.storageBytes;
      await pkg.delete();

      if (orgId) {
        const org = await Organization.findById(orgId);
        if (org) {
          await org.updateStorageUsage(-sizeReduction);
        }
      }
    }

    // Audit log
    if (context.actor?.userId) {
      await AuditService.withContext({
        actorId: context.actor.userId,
        actorType: 'user',
        organizationId: orgId,
      }).log('PACKAGE_DELETED', 'package', {
        resourceId: packageId,
        resourceName: packageName,
        metadata: { version },
        success: true,
      });
    }
  }

  /**
   * Get the S3 path for a package artifact
   */
  public getArtifactPath(
    protocol: string,
    organizationName: string,
    packageName: string,
    version: string,
    filename: string
  ): string {
    return `${this.config.basePath}/${protocol}/${organizationName}/${packageName}/${version}/${filename}`;
  }

  /**
   * Store artifact in S3
   */
  public async storeArtifact(
    path: string,
    data: Uint8Array,
    contentType?: string
  ): Promise<string> {
    const bucket = await this.config.bucket.getBucketByName(this.config.bucketName);
    await bucket.fastPut({
      path,
      contents: data as unknown as string,
    });
    return path;
  }

  /**
   * Fetch artifact from S3
   */
  public async fetchArtifact(path: string): Promise<Uint8Array | null> {
    try {
      const bucket = await this.config.bucket.getBucketByName(this.config.bucketName);
      const file = await bucket.fastGet({ path });
      if (!file) return null;
      return new Uint8Array(file);
    } catch {
      return null;
    }
  }

  /**
   * Delete artifact from S3
   */
  public async deleteArtifact(path: string): Promise<boolean> {
    try {
      const bucket = await this.config.bucket.getBucketByName(this.config.bucketName);
      await bucket.fastRemove({ path });
      return true;
    } catch {
      return false;
    }
  }
}