import { Plugin, FileSystemAdapter, TFile, MarkdownView, Notice } from 'obsidian';
import { LogfireSettings, DEFAULT_SETTINGS, deepMerge } from './types';
import { DatabaseManager } from './core/database';
import { EventBus } from './core/event-bus';
import { SessionManager } from './core/session-manager';
import { ContentAnalyzer } from './core/content-analyzer';
import { FileCollector } from './collectors/file-collector';
import { ContentCollector } from './collectors/content-collector';
import { NavCollector } from './collectors/nav-collector';
import { EditorCollector } from './collectors/editor-collector';
import { SystemCollector } from './collectors/system-collector';
import { LogfireSettingTab } from './ui/settings-tab';
import { InitialScanModal } from './ui/initial-scan-modal';
import { StatusBar } from './ui/status-bar';
import { EventStreamView, EVENT_STREAM_VIEW_TYPE } from './ui/event-stream-view';
import { registerLogfireBlock, registerLogfireSqlBlock, registerLogfireDashboardBlock, cleanupAllRefreshTimers } from './query/processor';
import { QueryModal } from './query/query-modal';
import { VirtualTableManager } from './query/virtual-tables';
import { DashboardView, DASHBOARD_VIEW_TYPE } from './viz/dashboard';
import { HistoryManager } from './management/history';
import { FavoritesManager, SaveFavoriteModal } from './management/favorites';
import { TemplateManager, TemplatePickerModal } from './management/templates';
import { SchemaView, SCHEMA_VIEW_TYPE } from './ui/schema-view';

export default class LogfirePlugin extends Plugin {
  settings!: LogfireSettings;
  db!: DatabaseManager;
  eventBus!: EventBus;
  sessionManager!: SessionManager;
  contentAnalyzer!: ContentAnalyzer;
  historyManager!: HistoryManager;
  favoritesManager!: FavoritesManager;
  templateManager!: TemplateManager;

  private fileCollector!: FileCollector;
  private contentCollector!: ContentCollector;
  private navCollector!: NavCollector;
  private editorCollector!: EditorCollector;
  private systemCollector!: SystemCollector;
  private statusBar!: StatusBar;
  private virtualTables!: VirtualTableManager;

  private paused = false;

  async onload(): Promise<void> {
    console.log('[Logfire] Lade Plugin...');

    await this.loadSettings();

    // Core infrastructure
    const dbPath = this.getDatabasePath();
    this.db = new DatabaseManager(dbPath, this.settings);

    this.eventBus = new EventBus(
      this.db,
      this.settings.advanced.flushIntervalMs,
      this.settings.advanced.flushThreshold,
    );

    const vaultName = this.app.vault.getName();
    this.sessionManager = new SessionManager(this.eventBus, this.db, vaultName);

    // Query management
    this.historyManager = new HistoryManager();
    this.favoritesManager = new FavoritesManager();
    this.templateManager = new TemplateManager();

    // Content analyzer
    this.contentAnalyzer = new ContentAnalyzer();
    if (this.db.hasBaseline()) {
      this.contentAnalyzer.loadBaseline(this.db.loadBaseline());
    }

    // Collectors
    const shouldTrack = (path: string) => this.shouldTrack(path);

    this.fileCollector = new FileCollector(
      this.app, this.eventBus, this.sessionManager, this.settings, shouldTrack,
    );
    this.contentCollector = new ContentCollector(
      this.app, this.eventBus, this.sessionManager, this.settings, this.contentAnalyzer, shouldTrack,
    );
    this.navCollector = new NavCollector(
      this.app, this.eventBus, this.sessionManager, this.settings, shouldTrack,
    );
    this.editorCollector = new EditorCollector(
      this.eventBus, this.sessionManager, this.settings, shouldTrack,
      () => this.getActiveFilePath(),
    );
    this.systemCollector = new SystemCollector(
      this.app, this.eventBus, this.sessionManager, this.settings,
    );

    // Register CM6 editor extension
    this.registerEditorExtension(this.editorCollector.createExtension());

    // UI: Settings tab
    this.addSettingTab(new LogfireSettingTab(this.app, this));

    // UI: Event stream view
    this.registerView(
      EVENT_STREAM_VIEW_TYPE,
      (leaf) => new EventStreamView(leaf, this.eventBus),
    );

    // UI: Dashboard view
    this.registerView(
      DASHBOARD_VIEW_TYPE,
      (leaf) => new DashboardView(leaf, this),
    );

    // UI: Schema-Browser view
    this.registerView(
      SCHEMA_VIEW_TYPE,
      (leaf) => new SchemaView(leaf, this.db),
    );

    // UI: Status bar
    this.statusBar = new StatusBar(this);
    this.statusBar.start();

    // Query: Code-Block-Prozessoren
    registerLogfireBlock(this.db, (lang, handler) => {
      this.registerMarkdownCodeBlockProcessor(lang, handler);
    });
    registerLogfireSqlBlock(this.db, (lang, handler) => {
      this.registerMarkdownCodeBlockProcessor(lang, handler);
    });
    registerLogfireDashboardBlock(this, this.db, (lang, handler) => {
      this.registerMarkdownCodeBlockProcessor(lang, handler);
    });

    // Ribbon icons
    this.addRibbonIcon('activity', 'Logfire: Event-Stream', () => {
      this.activateEventStream();
    });
    this.addRibbonIcon('layout-dashboard', 'Logfire: Dashboard', () => {
      this.activateDashboard();
    });

    // Commands
    this.registerCommands();

    // Start tracking
    if (!this.settings.general.pauseOnStartup) {
      this.startTracking();
    } else {
      this.paused = true;
    }

    // Initial scan + maintenance + virtual tables on startup (after layout ready)
    this.app.workspace.onLayoutReady(() => {
      if (!this.db.hasBaseline()) {
        this.runInitialScan();
      }
      if (this.settings.advanced.retention.maintenanceOnStartup) {
        try {
          this.db.runMaintenance(this.settings.advanced.retention);
        } catch (err) {
          console.error('[Logfire] Wartung beim Start fehlgeschlagen:', err);
        }
      }

      // Virtual Tables
      this.virtualTables = new VirtualTableManager(this.app, this.db);
      this.virtualTables.initialize();
    });

    console.log('[Logfire] Plugin geladen. Session:', this.sessionManager.currentSessionId);
  }

  async onunload(): Promise<void> {
    console.log('[Logfire] Entlade Plugin...');

    cleanupAllRefreshTimers();
    this.virtualTables?.destroy();
    this.statusBar?.destroy();
    this.stopTracking();

    if (this.sessionManager) {
      this.sessionManager.endSession();
    }

    if (this.eventBus) {
      this.eventBus.destroy();
    }

    if (this.db) {
      this.db.close();
    }

    console.log('[Logfire] Plugin entladen.');
  }

  // ---------------------------------------------------------------------------
  // Tracking lifecycle
  // ---------------------------------------------------------------------------

  private startTracking(): void {
    this.sessionManager.startSession();
    this.fileCollector.register();
    this.contentCollector.register();
    this.navCollector.register();
    this.systemCollector.register();
  }

  private stopTracking(): void {
    this.fileCollector?.unregister();
    this.contentCollector?.unregister();
    this.navCollector?.unregister();
    this.systemCollector?.unregister();
  }

  isPaused(): boolean {
    return this.paused;
  }

  pause(): void {
    if (!this.paused) {
      this.paused = true;
      this.stopTracking();
    }
  }

  resume(): void {
    if (this.paused) {
      this.paused = false;
      this.startTracking();
    }
  }

  // ---------------------------------------------------------------------------
  // Initial scan
  // ---------------------------------------------------------------------------

  private async runInitialScan(): Promise<void> {
    const modal = new InitialScanModal(
      this.app,
      this.settings,
      this.contentAnalyzer,
      this.db,
      this.eventBus,
      this.sessionManager,
      (path) => this.shouldTrack(path),
    );
    await modal.open();
  }

  // ---------------------------------------------------------------------------
  // Track filtering
  // ---------------------------------------------------------------------------

  shouldTrack(path: string): boolean {
    if (this.paused) return false;
    if (!this.settings.general.enabled) return false;

    const logFolder = this.settings.general.logFolder;
    if (path.startsWith(logFolder + '/') || path === logFolder) return false;
    if (path.startsWith('.obsidian/')) return false;

    for (const folder of this.settings.tracking.excludedFolders) {
      if (path.startsWith(folder + '/') || path === folder) return false;
    }

    for (const pattern of this.settings.tracking.excludedPatterns) {
      if (matchGlob(path, pattern)) return false;
    }

    const file = this.app.vault.getAbstractFileByPath(path);
    if (file instanceof TFile) {
      const cache = this.app.metadataCache.getFileCache(file);
      if (cache?.frontmatter?.logfire === false) return false;
    }

    return true;
  }

  private getActiveFilePath(): string | null {
    const view = this.app.workspace.getActiveViewOfType(MarkdownView);
    return view?.file?.path ?? null;
  }

  // ---------------------------------------------------------------------------
  // Commands
  // ---------------------------------------------------------------------------

  private registerCommands(): void {
    this.addCommand({
      id: 'show-event-stream',
      name: 'Event-Stream anzeigen',
      callback: () => this.activateEventStream(),
    });

    this.addCommand({
      id: 'toggle-tracking',
      name: 'Tracking pausieren/fortsetzen',
      callback: () => {
        if (this.paused) {
          this.resume();
          new Notice('Logfire: Tracking fortgesetzt.');
        } else {
          this.pause();
          new Notice('Logfire: Tracking pausiert.');
        }
      },
    });

    this.addCommand({
      id: 'rescan-vault',
      name: 'Vault erneut scannen',
      callback: () => this.runInitialScan(),
    });

    this.addCommand({
      id: 'run-maintenance',
      name: 'Wartung ausführen',
      callback: () => {
        this.db.runMaintenance(this.settings.advanced.retention);
        new Notice('Logfire: Wartung abgeschlossen.');
      },
    });

    this.addCommand({
      id: 'refresh-virtual-tables',
      name: 'Virtual Tables neu aufbauen',
      callback: () => {
        this.virtualTables?.rebuild();
        new Notice('Logfire: Virtual Tables aktualisiert.');
      },
    });

    this.addCommand({
      id: 'show-dashboard',
      name: 'Dashboard anzeigen',
      callback: () => this.activateDashboard(),
    });

    this.addCommand({
      id: 'open-query',
      name: 'Query-Editor \u00f6ffnen',
      callback: () => {
        new QueryModal(this.app, this.db, this.historyManager).open();
      },
    });

    this.addCommand({
      id: 'show-schema',
      name: 'Schema-Browser anzeigen',
      callback: () => this.activateSchema(),
    });

    this.addCommand({
      id: 'show-templates',
      name: 'Query-Templates anzeigen',
      callback: () => {
        new TemplatePickerModal(this, this.templateManager, (sql) => {
          new QueryModal(this.app, this.db, this.historyManager, sql).open();
        }).open();
      },
    });

    this.addCommand({
      id: 'save-favorite',
      name: 'Aktuelle Query als Favorit speichern',
      callback: () => {
        new SaveFavoriteModal(this, this.favoritesManager, '').open();
      },
    });

    this.addCommand({
      id: 'debug-info',
      name: 'Debug-Info',
      callback: () => {
        console.log('[Logfire] Debug-Info:', {
          paused: this.paused,
          sessionId: this.sessionManager.currentSessionId,
          sessionDuration: this.sessionManager.sessionDurationMs,
          bufferSize: this.eventBus.getBufferSize(),
          eventCount: this.db.getEventCount(),
          hasBaseline: this.db.hasBaseline(),
          dbSize: this.db.getDatabaseSizeBytes(),
        });
      },
    });
  }

  // ---------------------------------------------------------------------------
  // Event stream view
  // ---------------------------------------------------------------------------

  private async activateEventStream(): Promise<void> {
    const existing = this.app.workspace.getLeavesOfType(EVENT_STREAM_VIEW_TYPE);
    if (existing.length > 0) {
      this.app.workspace.revealLeaf(existing[0]);
      return;
    }
    const leaf = this.app.workspace.getRightLeaf(false);
    if (leaf) {
      await leaf.setViewState({ type: EVENT_STREAM_VIEW_TYPE, active: true });
      this.app.workspace.revealLeaf(leaf);
    }
  }

  // ---------------------------------------------------------------------------
  // Dashboard view
  // ---------------------------------------------------------------------------

  private async activateDashboard(): Promise<void> {
    const existing = this.app.workspace.getLeavesOfType(DASHBOARD_VIEW_TYPE);
    if (existing.length > 0) {
      this.app.workspace.revealLeaf(existing[0]);
      return;
    }
    const leaf = this.app.workspace.getRightLeaf(false);
    if (leaf) {
      await leaf.setViewState({ type: DASHBOARD_VIEW_TYPE, active: true });
      this.app.workspace.revealLeaf(leaf);
    }
  }

  // ---------------------------------------------------------------------------
  // Schema view
  // ---------------------------------------------------------------------------

  private async activateSchema(): Promise<void> {
    const existing = this.app.workspace.getLeavesOfType(SCHEMA_VIEW_TYPE);
    if (existing.length > 0) {
      this.app.workspace.revealLeaf(existing[0]);
      return;
    }
    const leaf = this.app.workspace.getRightLeaf(false);
    if (leaf) {
      await leaf.setViewState({ type: SCHEMA_VIEW_TYPE, active: true });
      this.app.workspace.revealLeaf(leaf);
    }
  }

  // ---------------------------------------------------------------------------
  // Settings
  // ---------------------------------------------------------------------------

  private async loadSettings(): Promise<void> {
    const saved = (await this.loadData()) as Partial<LogfireSettings> | null;
    this.settings = deepMerge(DEFAULT_SETTINGS, saved ?? {});
  }

  async saveSettings(): Promise<void> {
    await this.saveData(this.settings);
  }

  // ---------------------------------------------------------------------------
  // Database path
  // ---------------------------------------------------------------------------

  private getDatabasePath(): string {
    const adapter = this.app.vault.adapter;
    if (!(adapter instanceof FileSystemAdapter)) {
      throw new Error('[Logfire] Benötigt einen Desktop-Vault mit Dateisystem-Zugriff.');
    }
    const basePath = adapter.getBasePath();
    return `${basePath}/${this.app.vault.configDir}/plugins/logfire/logfire.db`;
  }
}

// ---------------------------------------------------------------------------
// Simple glob matching (supports * and **)
// ---------------------------------------------------------------------------

function matchGlob(path: string, pattern: string): boolean {
  const regex = pattern
    .replace(/[.+^${}()|[\]\\]/g, '\\$&')
    .replace(/\*\*/g, '{{GLOBSTAR}}')
    .replace(/\*/g, '[^/]*')
    .replace(/{{GLOBSTAR}}/g, '.*');
  return new RegExp(`^${regex}$`).test(path);
}