import { App, Notice, Plugin, TFile } from 'obsidian';
import { PluginSettings, IndexingProgress } from './src/types';
import { DEFAULT_SETTINGS, validateSettings } from './src/settings';
import { IndexingOrchestrator } from './src/indexing/orchestrator';
import { SearchModal } from './src/search/searchModal';
import { QdrantSettingsTab } from './src/ui/settingsTab';

export default class QdrantPlugin extends Plugin {
	settings: PluginSettings;
	private indexingOrchestrator: IndexingOrchestrator | null = null;
	private statusBarItem: HTMLElement | null = null;

	async onload() {
		console.log('Qdrant Semantic Search plugin loading...');
		
		try {
			await this.loadSettings();
			console.log('Settings loaded successfully');

			// Validate settings
			const errors = validateSettings(this.settings);
			if (errors.length > 0) {
				console.warn('Settings validation warnings:', errors);
				new Notice('Qdrant: Please configure settings. Settings validation warnings: ' + errors.join(', '));
			}

			// Add status bar item first
			this.setupStatusBar();
			console.log('Status bar added');

			// Add commands
			this.addCommands();
			console.log('Commands registered');

			// Add settings tab
			this.addSettingTab(new QdrantSettingsTab(this.app, this));
			console.log('Settings tab added');

			// Initialize indexing orchestrator (non-blocking)
			this.initializeOrchestrator();

			console.log('Qdrant Semantic Search plugin loaded successfully');
			new Notice('Qdrant Semantic Search loaded! Configure settings before indexing.');
		} catch (error) {
			console.error('Failed to load Qdrant plugin:', error);
			new Notice('Failed to load Qdrant plugin: ' + (error as Error).message);
			throw error;
		}
	}

	private async initializeOrchestrator() {
		try {
			console.log('Initializing indexing orchestrator...');
			console.log('Creating orchestrator with Qdrant URL:', this.settings.qdrant.url);
			this.indexingOrchestrator = new IndexingOrchestrator(this.app, this.settings);
			await this.indexingOrchestrator.initialize();
			
			// Set up progress tracking
			this.setupProgressTracking();
			
			console.log('Indexing orchestrator initialized successfully');
			this.updateStatusBar('Ready');
		} catch (error) {
			console.error('Failed to initialize indexing orchestrator:', error);
			console.error('Stack trace:', (error as Error).stack);
			new Notice('Qdrant: Indexing system not ready. Please check settings and connection.');
			this.updateStatusBar('Not configured');
		}
	}

	onunload() {
		// Shutdown indexing orchestrator
		if (this.indexingOrchestrator) {
			this.indexingOrchestrator.shutdown();
		}
	}

	/**
	 * Deep merge two objects, recursively merging nested objects
	 */
	private deepMerge(target: any, source: any): any {
		const output = Object.assign({}, target);
		if (this.isObject(target) && this.isObject(source)) {
			Object.keys(source).forEach(key => {
				if (this.isObject(source[key])) {
					if (!(key in target)) {
						Object.assign(output, { [key]: source[key] });
					} else {
						output[key] = this.deepMerge(target[key], source[key]);
					}
				} else {
					Object.assign(output, { [key]: source[key] });
				}
			});
		}
		return output;
	}

	private isObject(item: any): boolean {
		return item && typeof item === 'object' && !Array.isArray(item);
	}

	async loadSettings() {
		const loadedData = await this.loadData();
		console.log('Loading settings from data.json:', JSON.stringify(loadedData, null, 2));

		// Use deep merge to properly combine defaults with saved settings
		this.settings = this.deepMerge(DEFAULT_SETTINGS, loadedData || {});

		console.log('Merged settings (Qdrant URL):', this.settings.qdrant.url);
	}

	async saveSettings() {
		console.log('Saving settings (Qdrant URL):', this.settings.qdrant.url);
		await this.saveData(this.settings);

		// Reinitialize orchestrator with new settings
		console.log('Reinitializing orchestrator with updated settings...');
		if (this.indexingOrchestrator) {
			await this.indexingOrchestrator.shutdown();
			this.indexingOrchestrator = null;
		}

		// Reinitialize with new settings
		await this.initializeOrchestrator();
	}

	private setupStatusBar() {
		this.statusBarItem = this.addStatusBarItem();
		this.updateStatusBar('Ready');
	}

	private addCommands() {
		// Semantic search command
		this.addCommand({
			id: 'semantic-search',
			name: 'Semantic search',
			callback: () => {
				if (!this.indexingOrchestrator?.isReady()) {
					new Notice('Indexing system not ready. Please check your settings.');
					return;
				}
				new SearchModal(this.app, this.settings).open();
			}
		});

		// Index current file command
		this.addCommand({
			id: 'index-current-file',
			name: 'Index current file',
			checkCallback: (checking: boolean) => {
				const activeFile = this.app.workspace.getActiveFile();
				if (activeFile instanceof TFile) {
					if (!checking) {
						this.indexFile(activeFile);
					}
					return true;
				}
				return false;
			}
		});

		// Full reindex command
		this.addCommand({
			id: 'full-reindex',
			name: 'Full reindex vault',
			callback: () => {
				this.indexFullVault();
			}
		});

		// Clear index command
		this.addCommand({
			id: 'clear-index',
			name: 'Clear index',
			callback: () => {
				this.clearIndex();
			}
		});

		// Open graph view command
		if (this.settings.enableGraphView) {
			this.addCommand({
				id: 'open-graph-view',
				name: 'Open graph view',
				callback: () => {
					// TODO: Implement graph view
					new Notice('Graph view not yet implemented');
				}
			});
		}
	}

	private setupProgressTracking() {
		if (!this.indexingOrchestrator) return;

		this.indexingOrchestrator.setProgressCallback((progress: IndexingProgress) => {
			this.updateStatusBar(progress);
		});

		this.indexingOrchestrator.setErrorCallback((error: string) => {
			new Notice('Indexing error: ' + error);
		});
	}

	private updateStatusBar(progress: IndexingProgress | string) {
		if (!this.statusBarItem) return;

		if (typeof progress === 'string') {
			this.statusBarItem.setText(`Qdrant: ${progress}`);
			return;
		}

		if (progress.isRunning) {
			const percentage = progress.totalFiles > 0 
				? Math.round((progress.processedFiles / progress.totalFiles) * 100)
				: 0;
			this.statusBarItem.setText(`Qdrant: Indexing ${percentage}% (${progress.processedFiles}/${progress.totalFiles})`);
		} else {
			this.statusBarItem.setText('Qdrant: Ready');
		}
	}

	// Public methods for settings tab
	async testQdrantConnection(): Promise<boolean> {
		if (!this.indexingOrchestrator) return false;
		const connections = await this.indexingOrchestrator.testConnections();
		return connections.qdrant;
	}

	async testOllamaConnection(): Promise<boolean> {
		if (!this.indexingOrchestrator) return false;
		const connections = await this.indexingOrchestrator.testConnections();
		return connections.embedding;
	}

	async indexFullVault(): Promise<void> {
		if (!this.indexingOrchestrator?.isReady()) {
			throw new Error('Indexing system not ready');
		}
		await this.indexingOrchestrator.indexFullVault();
	}

	async indexFile(file: TFile): Promise<void> {
		if (!this.indexingOrchestrator?.isReady()) {
			throw new Error('Indexing system not ready');
		}
		await this.indexingOrchestrator.indexFile(file);
	}

	async clearIndex(): Promise<void> {
		if (!this.indexingOrchestrator?.isReady()) {
			throw new Error('Indexing system not ready');
		}
		await this.indexingOrchestrator.clearIndex();
	}

	async getIndexStats(): Promise<any> {
		if (!this.indexingOrchestrator?.isReady()) {
			throw new Error('Indexing system not ready');
		}
		return await this.indexingOrchestrator.getIndexStats();
	}
}