import type { Express } from "express";
import { createServer, type Server } from "http";
import { storage } from "./storage";
import { insertRouterSchema, insertDetectionSchema, insertWhitelistSchema } from "@shared/schema";

export async function registerRoutes(app: Express): Promise<Server> {
  // Routers
  app.get("/api/routers", async (req, res) => {
    try {
      const routers = await storage.getAllRouters();
      res.json(routers);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch routers" });
    }
  });

  app.post("/api/routers", async (req, res) => {
    try {
      const validatedData = insertRouterSchema.parse(req.body);
      const router = await storage.createRouter(validatedData);
      res.json(router);
    } catch (error) {
      res.status(400).json({ error: "Invalid router data" });
    }
  });

  app.delete("/api/routers/:id", async (req, res) => {
    try {
      const success = await storage.deleteRouter(req.params.id);
      if (!success) {
        return res.status(404).json({ error: "Router not found" });
      }
      res.json({ success: true });
    } catch (error) {
      res.status(500).json({ error: "Failed to delete router" });
    }
  });

  // Network Logs
  app.get("/api/logs", async (req, res) => {
    try {
      const limit = parseInt(req.query.limit as string) || 100;
      const logs = await storage.getRecentLogs(limit);
      res.json(logs);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch logs" });
    }
  });

  app.get("/api/logs/ip/:ip", async (req, res) => {
    try {
      const limit = parseInt(req.query.limit as string) || 50;
      const logs = await storage.getLogsByIp(req.params.ip, limit);
      res.json(logs);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch logs for IP" });
    }
  });

  // Detections
  app.get("/api/detections", async (req, res) => {
    try {
      const limit = parseInt(req.query.limit as string) || 100;
      const detections = await storage.getAllDetections(limit);
      res.json(detections);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch detections" });
    }
  });

  app.get("/api/detections/unblocked", async (req, res) => {
    try {
      const detections = await storage.getUnblockedDetections();
      res.json(detections);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch unblocked detections" });
    }
  });

  // Whitelist
  app.get("/api/whitelist", async (req, res) => {
    try {
      const whitelist = await storage.getAllWhitelist();
      res.json(whitelist);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch whitelist" });
    }
  });

  app.post("/api/whitelist", async (req, res) => {
    try {
      const validatedData = insertWhitelistSchema.parse(req.body);
      const item = await storage.createWhitelist(validatedData);
      res.json(item);
    } catch (error) {
      res.status(400).json({ error: "Invalid whitelist data" });
    }
  });

  app.delete("/api/whitelist/:id", async (req, res) => {
    try {
      const success = await storage.deleteWhitelist(req.params.id);
      if (!success) {
        return res.status(404).json({ error: "Whitelist entry not found" });
      }
      res.json({ success: true });
    } catch (error) {
      res.status(500).json({ error: "Failed to delete whitelist entry" });
    }
  });

  // Training History
  app.get("/api/training-history", async (req, res) => {
    try {
      const limit = parseInt(req.query.limit as string) || 10;
      const history = await storage.getTrainingHistory(limit);
      res.json(history);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch training history" });
    }
  });

  app.get("/api/training-history/latest", async (req, res) => {
    try {
      const latest = await storage.getLatestTraining();
      res.json(latest || null);
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch latest training" });
    }
  });

  // Stats
  app.get("/api/stats", async (req, res) => {
    try {
      const routers = await storage.getAllRouters();
      const detections = await storage.getAllDetections(1000);
      const recentLogs = await storage.getRecentLogs(1000);
      const whitelist = await storage.getAllWhitelist();
      const latestTraining = await storage.getLatestTraining();

      const blockedCount = detections.filter(d => d.blocked).length;
      const criticalCount = detections.filter(d => parseFloat(d.riskScore) >= 85).length;
      const highCount = detections.filter(d => parseFloat(d.riskScore) >= 70 && parseFloat(d.riskScore) < 85).length;

      res.json({
        routers: {
          total: routers.length,
          enabled: routers.filter(r => r.enabled).length
        },
        detections: {
          total: detections.length,
          blocked: blockedCount,
          critical: criticalCount,
          high: highCount
        },
        logs: {
          recent: recentLogs.length
        },
        whitelist: {
          total: whitelist.length
        },
        latestTraining: latestTraining
      });
    } catch (error) {
      res.status(500).json({ error: "Failed to fetch stats" });
    }
  });

  // ML Actions - Trigger training/detection on Python backend
  const ML_BACKEND_URL = process.env.ML_BACKEND_URL || "http://localhost:8000";
  const ML_TIMEOUT = 120000; // 2 minutes timeout

  app.post("/api/ml/train", async (req, res) => {
    try {
      const { max_records = 100000, hours_back = 24 } = req.body;
      
      // Validate input
      if (typeof max_records !== 'number' || max_records <= 0 || max_records > 1000000) {
        return res.status(400).json({ error: "max_records must be between 1 and 1000000" });
      }
      if (typeof hours_back !== 'number' || hours_back <= 0 || hours_back > 720) {
        return res.status(400).json({ error: "hours_back must be between 1 and 720" });
      }

      const controller = new AbortController();
      const timeout = setTimeout(() => controller.abort(), ML_TIMEOUT);

      const response = await fetch(`${ML_BACKEND_URL}/train`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ max_records, hours_back }),
        signal: controller.signal,
      });

      clearTimeout(timeout);

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        return res.status(response.status).json({ 
          error: errorData.detail || "Training failed",
          status: response.status,
        });
      }

      const data = await response.json();
      res.json(data);
    } catch (error: any) {
      if (error.name === 'AbortError') {
        return res.status(504).json({ error: "Training timeout - operation took too long" });
      }
      if (error.code === 'ECONNREFUSED') {
        return res.status(503).json({ error: "ML backend not available - is Python server running?" });
      }
      res.status(500).json({ error: error.message || "Failed to trigger training" });
    }
  });

  app.post("/api/ml/detect", async (req, res) => {
    try {
      const { max_records = 50000, hours_back = 1, risk_threshold = 75, auto_block = false } = req.body;
      
      // Validate input
      if (typeof max_records !== 'number' || max_records <= 0 || max_records > 1000000) {
        return res.status(400).json({ error: "max_records must be between 1 and 1000000" });
      }
      if (typeof hours_back !== 'number' || hours_back <= 0 || hours_back > 720) {
        return res.status(400).json({ error: "hours_back must be between 1 and 720" });
      }
      if (typeof risk_threshold !== 'number' || risk_threshold < 0 || risk_threshold > 100) {
        return res.status(400).json({ error: "risk_threshold must be between 0 and 100" });
      }

      const controller = new AbortController();
      const timeout = setTimeout(() => controller.abort(), ML_TIMEOUT);

      const response = await fetch(`${ML_BACKEND_URL}/detect`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ max_records, hours_back, risk_threshold, auto_block }),
        signal: controller.signal,
      });

      clearTimeout(timeout);

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        return res.status(response.status).json({ 
          error: errorData.detail || "Detection failed",
          status: response.status,
        });
      }

      const data = await response.json();
      res.json(data);
    } catch (error: any) {
      if (error.name === 'AbortError') {
        return res.status(504).json({ error: "Detection timeout - operation took too long" });
      }
      if (error.code === 'ECONNREFUSED') {
        return res.status(503).json({ error: "ML backend not available - is Python server running?" });
      }
      res.status(500).json({ error: error.message || "Failed to trigger detection" });
    }
  });

  app.get("/api/ml/stats", async (req, res) => {
    try {
      const controller = new AbortController();
      const timeout = setTimeout(() => controller.abort(), 10000); // 10s timeout for stats

      const response = await fetch(`${ML_BACKEND_URL}/stats`, {
        signal: controller.signal,
      });

      clearTimeout(timeout);

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        return res.status(response.status).json({ 
          error: errorData.detail || "Failed to fetch ML stats",
          status: response.status,
        });
      }

      const data = await response.json();
      res.json(data);
    } catch (error: any) {
      if (error.name === 'AbortError') {
        return res.status(504).json({ error: "Stats timeout" });
      }
      if (error.code === 'ECONNREFUSED') {
        return res.status(503).json({ error: "ML backend not available" });
      }
      res.status(500).json({ error: error.message || "Failed to fetch ML stats" });
    }
  });

  const httpServer = createServer(app);
  return httpServer;
}