const intructorRouter = require("express").Router();
const passport = require("passport");
const axios = require("axios");
const multer = require('multer');
const FormData = require('form-data');


const DB_ASSIGNMENT_SERVICE_URL =
  process.env.DB_ASSIGNMENT_SERVICE_URL || "http://localhost:3000";
console.log("DB_ASSIGNMENT_SERVICE_URL:", DB_ASSIGNMENT_SERVICE_URL);

// Use memory storage to keep file in RAM
const upload = multer({ storage: multer.memoryStorage() });


// This endpoint is for instructors to create a new assignment
intructorRouter.post("/create", 
  upload.single('file'),
  // passport.authenticate("jwt", { session: false }), 
  async (req, res) => {
    try {
    
      const file = req.file;
      const assignmentData = req.body;

      if (!file) {
        return res.status(400).send('No file uploaded.');
      }

      await axios.post('https://target-api.com/endpoint', {
        filename: file.originalname,
        mimetype: file.mimetype,
        content: file.buffer.toString('base64')
      }, {
        headers: {
          'Content-Type': 'application/json'
        }
      });

      console.log("Creating a new assignment with data:", req.body);
      const response = await axios.post(`${DB_ASSIGNMENT_SERVICE_URL}/assignments`, req.body);
      console.log("Response from DB_ASSIGNMENT_SERVICE_URL:", response.data);
      res.status(response.status).json(response.data);
    } catch (error) {
      console.error("Error creating assignment:", error.message);
      res.status(error.response?.status || 500).json({ error: error.message });
    }
  }
);

// This endpoint is for instructors to get details of a specific assignment
intructorRouter.get("/details/:id", async (req, res) => {
  try {
    const assignmentId = req.params.id;
    console.log("Fetching details for assignmentId:", assignmentId);
    const response = await axios.get(
      `${DB_ASSIGNMENT_SERVICE_URL}/assignments/${assignmentId}`
    );
    
    console.log("Response from DB_ASSIGNMENT_SERVICE_URL:", response.data);
    res.status(response.status).json(response.data);
  } catch (error) {
    console.error("Error fetching assignment details:", error.message);
    res.status(error.response?.status || 500).json({ error: error.message });
  }
});

// This endpoint is for instructors to get a list of assignments they have created
intructorRouter.get(
  "/list/:id",
  // passport.authenticate("jwt", { session: false }),
  async (req, res) => {
    // if (req.isAuthenticated()) {
    try {
      const instructorId = req.params.id;
      console.log("Fetching assignments for instructorId:", instructorId);
      // const instructorId = req.user.userid; // Assuming req.user contains the authenticated user
      const response = await axios.get(
        `${DB_ASSIGNMENT_SERVICE_URL}/assignments/instructor/${instructorId}`
      );
      console.log("Response from DB_ASSIGNMENT_SERVICE_URL:", response.data);
      res.status(response.status).json(response.data);
    } catch (error) {
      res.status(error.response?.status || 500).json({ error: error.message });
    }
    // } else {
    //   return res.status(401).json({ error: "Not authenticated" });
    // }
  }
);

// This endpoint is for instructors to update an assignment
intructorRouter.put(
  "/update/:id",
  // passport.authenticate("jwt", { session: false }),
  async (req, res) => {
    try {
      const assignmentId = req.params.id;

      const response = await axios.put(
        `${DB_ASSIGNMENT_SERVICE_URL}/assignments/${assignmentId}`,
        req.body
      );
      res.status(response.status).json(response.data);
    } catch (error) {
      res.status(error.response?.status || 500).json({ error: error.message });
    }
  }
);

// This endpoint is for instructors to delete an assignment
intructorRouter.delete(
  "/delete/:id",
  // passport.authenticate("jwt", { session: false }),
  async (req, res) => {
    try {
      const assignmentId = req.params.id;
      const response = await axios.delete(
        `${DB_ASSIGNMENT_SERVICE_URL}/assignments/${assignmentId}`
      );
      res.status(response.status).json(response.data);
    } catch (error) {
      res.status(error.response?.status || 500).json({ error: error.message });
    }
  }
);

module.exports = intructorRouter;