import { initializeApp } from 'firebase/app';
import { getStorage } from 'firebase/storage';

const firebaseConfig = {
  // Your Firebase configuration
  apiKey: "your-api-key",
  authDomain: "your-project.firebaseapp.com",
  projectId: "your-project-id",
  storageBucket: "your-project.appspot.com",
  messagingSenderId: "your-sender-id",
  appId: "your-app-id"
};

const app = initializeApp(firebaseConfig);
const storage = getStorage(app);

interface UploadManagerConfig {
  maxConcurrentUploads: number;    // Default: 4
  chunkSize: number;               // Default: 1MB (1024 * 1024)
  retryAttempts: number;           // Default: 3
  retryDelay: number;              // Default: 1000ms
  autoStart: boolean;              // Default: true
  maxBandwidthMbps?: number;       // Default: 10
  adaptiveBandwidth?: boolean;     // Default: true
  maxMemoryItems?: number;         // Default: 1000
  enablePersistence?: boolean;     // Default: false
  enableSmartScheduling: boolean;  // Default: true
}

interface UploadManagerOptions {
  path?: string;                   // Storage path
  metadata?: Record<string, any>;  // Custom metadata
  priority?: number;               // Upload priority
  // ... additional options
}

// File Management
await manager.addFiles(fileList: FileList | File[], options?: UploadManagerOptions): Promise<number>
await manager.addFilesWithValidation(files: File[], options?: ValidationOptions): Promise<ValidationResult>

// Upload Control
await manager.start(): Promise<void>
await manager.pause(): Promise<void>
await manager.resume(): Promise<void>
await manager.stop(): Promise<void>
await manager.destroy(): Promise<void>

// File Operations
await manager.removeFile(fileId: string): Promise<void>
manager.retryFailed(): void
await manager.clearCompleted(): Promise<void>
manager.clearFailed(): void

// Queries
manager.getFile(fileId: string): UploadItem | undefined
manager.getAllFiles(statusFilter?: UploadStatus): UploadItem[]

// File Validation
await manager.validateFiles(files: File[], rules?: ValidationRule): Promise<Map<File, ValidationResult>>
await manager.validateFile(file: File, rules?: ValidationRule): Promise<ValidationResult>
await manager.detectDuplicates(files: File[]): Promise<Map<string, File[]>>

// Metadata
await manager.getFileMetadata(file: File): Promise<FileMetadata>

// Health Checks
await manager.performHealthCheck(): Promise<HealthCheckResult>
await manager.startWithHealthCheck(): Promise<{ canStart: boolean; healthResult: HealthCheckResult }>
manager.getHealthStatus(): HealthStatus

// Performance
manager.getBandwidthStats(): BandwidthStats
manager.getNetworkQuality(): 'excellent' | 'good' | 'poor' | 'unknown'
manager.getRecommendedSettings(): RecommendedSettings

// Plugin Management
await manager.registerPlugin(plugin: UploadPlugin, config?: PluginConfig): Promise<void>
await manager.unregisterPlugin(pluginName: string): Promise<void>
manager.getAllPlugins(): PluginInfo[]
manager.getEnabledPlugins(): PluginInfo[]
await manager.setPluginEnabled(pluginName: string, enabled: boolean): Promise<void>

// Copy and customize from the examples
class MyCustomLoggingPlugin implements UploadPlugin {
  name = 'my-logging';
  version = '1.0.0';
  description = 'My custom logging implementation';

  // Copy implementation from LoggingPlugin example and customize...
}

await manager.registerPlugin(new MyCustomLoggingPlugin());

import type { UploadPlugin, UploadItem } from 'svelte-firebase-upload';

export class CustomPlugin implements UploadPlugin {
  name = 'custom-plugin';
  version = '1.0.0';
  description = 'My custom plugin';

  async onInitialize(manager: UploadManagerInterface): Promise<void> {
    console.log('Plugin initialized');
  }

  async onUploadComplete(item: UploadItem, result: any): Promise<void> {
    console.log(`Upload completed: ${item.file.name}`);
    // Custom logic here
  }

  async onUploadError(item: UploadItem, error: Error): Promise<void> {
    console.log(`Upload failed: ${item.file.name}`, error);
    // Custom error handling
  }
}

// Register your plugin
await manager.registerPlugin(new CustomPlugin());

const validationResult = await manager.addFilesWithValidation(files, {
  validate: true,
  validationRules: {
    maxSize: 50 * 1024 * 1024, // 50MB
    allowedTypes: ['image/jpeg', 'image/png', 'application/pdf'],
    customValidator: async (file: File) => {
      // Custom validation logic
      return file.name.length < 100;
    }
  },
  skipDuplicates: true,
  checkResume: true
});

console.log(`Added: ${validationResult.added}, Duplicates: ${validationResult.duplicates}`);

// Check for resumable uploads on initialization
await manager.resumeIncompleteUploads();

// Check specific file
const resumeState = await manager.checkForResumableUpload(file);
if (resumeState) {
  console.log(`Can resume upload: ${resumeState.uploadedBytes}/${resumeState.fileSize} bytes`);
}

// Automatically handles large file sets efficiently
const files = Array.from(document.querySelector('input[type="file"]')!.files!);
if (files.length > 1000) {
  // Uses virtual queuing automatically
  await manager.addFiles(files, {
    path: 'bulk-upload/',
    maxMemoryItems: 500 // Process in batches of 500
  });
}

// Check health before starting critical uploads
const { canStart, healthResult } = await manager.startWithHealthCheck();
if (!canStart) {
  console.warn('Health issues detected:', healthResult.status.issues);
  // Handle health issues
}

// Monitor health during uploads
const healthStatus = manager.getHealthStatus();
if (!healthStatus.healthy) {
  console.warn('Upload health degraded:', healthStatus.issues);
}

// Reactive properties
manager.totalProgress    // Derived from uploaded/total size
manager.isActive         // Derived from active uploads
manager.hasQueuedFiles   // Derived from queue length
manager.averageSpeed     // Derived from speed samples

import type {
  FirebaseUploadManager,
  UploadManagerConfig,
  UploadManagerOptions,
  UploadItem,
  UploadStatus,
  ValidationRule,
  ValidationResult,
  HealthCheckResult,
  UploadPlugin,
  PluginConfig
} from 'svelte-firebase-upload';