import type { AuthenticatedRequest } from "../../../types/index.js";
import express, { type Request, type Response } from "express";
import { dashboardLogger } from "../../utils/logger.js";
import { AuthManager } from "../../utils/auth-manager.js";
import { DataCrypto } from "../../utils/data-crypto.js";
import { recentActivity } from "../../plugins/activity-provider.js";

const router = express.Router();

const authManager = AuthManager.getInstance();
const authenticateJWT = authManager.createAuthMiddleware();

const serverStartTime = Date.now();

function isUserDataUnlocked(userId: string): boolean {
  return DataCrypto.getUserDataKey(userId) !== null;
}

/**
 * @openapi
 * /dashboard/uptime:
 *   get:
 *     summary: Get server uptime
 *     description: Returns the uptime of the server in various formats.
 *     tags:
 *       - Dashboard
 *     responses:
 *       200:
 *         description: Server uptime information.
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 uptimeMs:
 *                   type: number
 *                 uptimeSeconds:
 *                   type: number
 *                 formatted:
 *                   type: string
 *       500:
 *         description: Failed to get uptime.
 */
router.get("/uptime", authenticateJWT, async (req: Request, res: Response) => {
  try {
    const uptimeMs = Date.now() - serverStartTime;
    const uptimeSeconds = Math.floor(uptimeMs / 1000);
    const days = Math.floor(uptimeSeconds / 86400);
    const hours = Math.floor((uptimeSeconds % 86400) / 3600);
    const minutes = Math.floor((uptimeSeconds % 3600) / 60);

    res.json({
      uptimeMs,
      uptimeSeconds,
      formatted: `${days}d ${hours}h ${minutes}m`,
    });
  } catch (err) {
    dashboardLogger.error("Failed to get uptime", err);
    res.status(500).json({ error: "Failed to get uptime" });
  }
});

/**
 * @openapi
 * /dashboard/activity/recent:
 *   get:
 *     summary: Get recent activity
 *     description: Fetches the most recent activities for the authenticated user.
 *     tags:
 *       - Dashboard
 *     parameters:
 *       - in: query
 *         name: limit
 *         schema:
 *           type: integer
 *         description: The maximum number of activities to return.
 *     responses:
 *       200:
 *         description: A list of recent activities.
 *       401:
 *         description: Session expired.
 *       500:
 *         description: Failed to get recent activity.
 */
router.get(
  "/activity/recent",
  authenticateJWT,
  async (req: Request, res: Response) => {
    try {
      const userId = (req as AuthenticatedRequest).userId;

      if (!isUserDataUnlocked(userId)) {
        return res.status(401).json({
          error: "Session expired - please log in again",
          code: "SESSION_EXPIRED",
        });
      }

      const limit = Number(req.query.limit) || 20;

      const activities = await recentActivity.list(userId, limit);

      res.json(activities);
    } catch (err) {
      dashboardLogger.error("Failed to get recent activity", err);
      res.status(500).json({ error: "Failed to get recent activity" });
    }
  },
);

/**
 * @openapi
 * /dashboard/activity/log:
 *   post:
 *     summary: Log a new activity
 *     description: Logs a new user activity, such as accessing a terminal or file manager. This endpoint is rate-limited.
 *     tags:
 *       - Dashboard
 *     requestBody:
 *       required: true
 *       content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               type:
 *                 type: string
 *                 description: An activity type a plugin's tab declares, lowercase letters, digits and underscores.
 *               hostId:
 *                 type: integer
 *               hostName:
 *                 type: string
 *     responses:
 *       200:
 *         description: Activity logged successfully or rate-limited.
 *       400:
 *         description: Invalid request body.
 *       401:
 *         description: Session expired.
 *       404:
 *         description: Host not found or access denied.
 *       500:
 *         description: Failed to log activity.
 */
router.post(
  "/activity/log",
  authenticateJWT,
  async (req: Request, res: Response) => {
    try {
      const userId = (req as AuthenticatedRequest).userId;

      if (!isUserDataUnlocked(userId)) {
        return res.status(401).json({
          error: "Session expired - please log in again",
          code: "SESSION_EXPIRED",
        });
      }

      const { type, hostId, hostName } = req.body;

      if (!type || !hostId || !hostName) {
        return res.status(400).json({
          error: "Missing required fields: type, hostId, hostName",
        });
      }

      const result = await recentActivity.record(userId, {
        type,
        hostId,
        hostName,
      });
      if (result.status === "invalid_type") {
        return res.status(400).json({
          error:
            "Invalid activity type. Use lowercase letters, digits and underscores.",
        });
      }
      if (result.status === "rate_limited") {
        return res.json({
          message: "Activity already logged recently (rate limited)",
        });
      }
      if (result.status === "unavailable") {
        return res
          .status(404)
          .json({ error: "Recent activity is not available" });
      }
      if (result.status === "denied") {
        return res
          .status(404)
          .json({ error: "Host not found or access denied" });
      }

      res.json({ message: "Activity logged", id: result.id });
    } catch (err) {
      dashboardLogger.error("Failed to log activity", err);
      res.status(500).json({ error: "Failed to log activity" });
    }
  },
);

/**
 * @openapi
 * /dashboard/activity/reset:
 *   delete:
 *     summary: Reset recent activity
 *     description: Clears all recent activity for the authenticated user.
 *     tags:
 *       - Dashboard
 *     responses:
 *       200:
 *         description: Recent activity cleared.
 *       401:
 *         description: Session expired.
 *       500:
 *         description: Failed to reset activity.
 */
router.delete(
  "/activity/reset",
  authenticateJWT,
  async (req: Request, res: Response) => {
    try {
      const userId = (req as AuthenticatedRequest).userId;

      await recentActivity.deleteByUserId(userId);

      dashboardLogger.success("Recent activity cleared", {
        operation: "reset_recent_activity",
        userId,
      });

      res.json({ message: "Recent activity cleared" });
    } catch (err) {
      dashboardLogger.error("Failed to reset activity", err);
      res.status(500).json({ error: "Failed to reset activity" });
    }
  },
);

export default router;