import type { MouseEvent as ReactMouseEvent } from 'react';
import { v4 as uuidv4 } from 'uuid';
import { reportUserEvent, type UserEventPayload } from '@/utils/api';
import { getUserId } from '@/utils/storage';

// 路由 path → page_id 映射，需与 .cursorrules 中的命名约定保持一致
const PATH_TO_PAGE_ID: Record<string, string> = {
  '/welcome': 'welcome',
  '/begin': 'begin',
  '/login-register': 'login_register',
  '/loading': 'loading',
  '/naming': 'naming',
  '/lumi-naming': 'lumi_naming',
  '/chatbot': 'chatbot',
  '/tutorial-1': 'tutorial_1',
  '/tutorial-2': 'tutorial_2',
  '/tutorial-3': 'tutorial_3',
  '/tutorial-4': 'tutorial_4',
  '/tutorial-5': 'tutorial_5',
  '/tutorial-6': 'tutorial_6',
  '/tutorial-7': 'tutorial_7',
  '/tutorial-8': 'tutorial_8',
  '/tutorial-9': 'tutorial_9',
  '/tutorial-10': 'tutorial_10',
  '/level5-welcome': 'level5_welcome',
  '/level34-welcome': 'level34_welcome',
  '/first-login': 'first_login',
  '/verification-code': 'verification_code',
  '/verification-input': 'verification_input',
  '/login-verification-code': 'login_verification_code',
  '/login-verification-input': 'login_verification_input',
  '/first-login-reward': 'first_login_reward',
  '/share-success': 'share_success',
  '/email-login': 'email_login',
  '/phone-login': 'phone_login',
  '/profile': 'profile',
  '/error': 'error',
};

const getPageIdFromPath = (path: string): string | null => {
  if (!path) return null;
  const clean = path.split('?')[0];
  return PATH_TO_PAGE_ID[clean] ?? null;
};

const getPlatform = (): UserEventPayload['platform'] => 'web';

const getTimezoneOffsetMinutes = (): number => -new Date().getTimezoneOffset();

const getAppVersion = (): string | undefined => import.meta.env.VITE_APP_VERSION;

const SESSION_ID_KEY = 'lyrria_session_id';

function getOrCreateSessionId(): string {
  try {
    let sid = sessionStorage.getItem(SESSION_ID_KEY);
    if (!sid) {
      sid = uuidv4();
      sessionStorage.setItem(SESSION_ID_KEY, sid);
    }
    return sid;
  } catch {
    return uuidv4();
  }
}

export const trackPageEnter = (path: string): void => {
  const userId = getUserId();
  const pageId = getPageIdFromPath(path);
  if (!userId || !pageId) {
    if (import.meta.env.DEV) {
      console.log('[tracking] trackPageEnter 跳过:', { path, hasUserId: !!userId, pageId });
    }
    return;
  }

  const event: UserEventPayload = {
    event_id: uuidv4(),
    user_id: userId,
    event_name: `page.${pageId}__enter`,
    event_label: `进入页面:${pageId}`,
    event_time: new Date().toISOString(),
    session_id: getOrCreateSessionId(),
    platform: getPlatform(),
    app_version: getAppVersion(),
    timezone_offset_minutes: getTimezoneOffsetMinutes(),
    properties: {
      page: pageId,
      path,
    },
  };

  reportUserEvent(event);
};

export const trackButtonClick = (
  pageId: string,
  buttonId: string,
  options?: {
    label?: string;
    properties?: Record<string, unknown>;
  },
): void => {
  const userId = getUserId();
  if (!userId) {
    if (import.meta.env.DEV) {
      console.log('[tracking] trackButtonClick 跳过: 未登录', { pageId, buttonId });
    }
    return;
  }

  const eventName = `button.${pageId}.${buttonId}__click`;
  const event: UserEventPayload = {
    event_id: uuidv4(),
    user_id: userId,
    event_name: eventName,
    event_label: options?.label ?? `按钮点击:${pageId}.${buttonId}`,
    event_time: new Date().toISOString(),
    session_id: getOrCreateSessionId(),
    platform: getPlatform(),
    app_version: getAppVersion(),
    timezone_offset_minutes: getTimezoneOffsetMinutes(),
    properties: {
      page: pageId,
      button_id: buttonId,
      ...(options?.properties ?? {}),
    },
  };

  reportUserEvent(event);
};

/** 包装点击回调：先上报 button 埋点再执行原 onClick（用于原生 button/div 等） */
export function wrapTrackedClick(
  pageId: string,
  buttonId: string,
  onClick?: (e?: ReactMouseEvent<HTMLElement>) => void,
  options?: { label?: string; properties?: Record<string, unknown> },
): (e?: ReactMouseEvent<HTMLElement>) => void {
  return (e?: ReactMouseEvent<HTMLElement>) => {
    trackButtonClick(pageId, buttonId, options);
    onClick?.(e);
  };
}