import * as vscode from 'vscode';
import { Collector, UserBehaviorCollector } from '@ide-collector/core-sdk';
import { debounce } from '@ide-collector/shared';

/**
 * 编辑器适配器
 * 用于捕获编辑器活动和用户行为
 */
export class EditorAdapter {
  private collector: Collector;
  private behaviorCollector: UserBehaviorCollector;
  private lastActivityTime: number = 0;
  private inactivityTimeout: ReturnType<typeof setTimeout> | null = null;
  private readonly INACTIVITY_THRESHOLD = 300000; // 5分钟

  constructor(collector: Collector) {
    this.collector = collector;
    this.behaviorCollector = new UserBehaviorCollector(collector);
  }

  /**
   * 编辑器切换时调用
   */
  public onEditorChange(editor: vscode.TextEditor): void {
    this.recordActivity();

    // 记录当前编辑的语言
    const language = editor.document.languageId;
    this.behaviorCollector.trackAIUsage(`editor_language_${language}`);
  }

  /**
   * 文档变化时调用
   */
  public onDocumentChange = debounce(
    (event: vscode.TextDocumentChangeEvent): void => {
      this.recordActivity();

      // 检测是否可能是 AI 生成的代码（大量文本一次性插入）
      for (const change of event.contentChanges) {
        if (change.text.length > 50 && change.rangeLength === 0) {
          this.behaviorCollector.trackAIUsage('possible_ai_insertion');
        }
      }
    },
    500
  );

  /**
   * 选择变化时调用
   */
  public onSelectionChange(event: vscode.TextEditorSelectionChangeEvent): void {
    this.recordActivity();
  }

  /**
   * 记录活动
   */
  private recordActivity(): void {
    const now = Date.now();

    // 如果之前处于不活跃状态，开始新的活动周期
    if (now - this.lastActivityTime > this.INACTIVITY_THRESHOLD) {
      this.behaviorCollector.startActivity();
    }

    this.lastActivityTime = now;

    // 重置不活跃计时器
    if (this.inactivityTimeout) {
      clearTimeout(this.inactivityTimeout);
    }

    this.inactivityTimeout = setTimeout(() => {
      this.onInactive();
    }, this.INACTIVITY_THRESHOLD);
  }

  /**
   * 不活跃时调用
   */
  private async onInactive(): Promise<void> {
    await this.behaviorCollector.flushStats();
  }

  /**
   * 获取当前活动状态
   */
  public getActivityStatus(): {
    isActive: boolean;
    lastActivityTime: number;
    aiUsageStats: Record<string, number>;
  } {
    return {
      isActive: Date.now() - this.lastActivityTime < this.INACTIVITY_THRESHOLD,
      lastActivityTime: this.lastActivityTime,
      aiUsageStats: this.behaviorCollector.getAIUsageStats(),
    };
  }
}