// const express = require("express");
// const multer = require("multer");
// const axios = require("axios");
// const cors = require("cors");
// const mysql = require("mysql2/promise");
// const FormData = require("form-data");

// const app = express();
// const PORT = 5002;

// app.use(express.json());
// app.use(cors());

// // Use multer memory storage for file uploads
// const upload = multer({ storage: multer.memoryStorage() });

// // MySQL connection config — keys must be lowercase for mysql2
// const dbConfig = {
//   host: "122.166.69.162",
//   user: "rootuser",
//   password: "1234",
//   database: "vvvet",
//   port: 5002, // default MySQL port; change if needed
// };

// let db;
// (async () => {
//   try {
//     db = await mysql.createPool(dbConfig);
//     console.log("Connected to MySQL DB");
//   } catch (err) {
//     console.error("MySQL connection error:", err);
//   }
// })();

// // PAN verification API
// app.post("/api/verify-pan", upload.single("panImage"), async (req, res) => {
//   try {
//     const { pan } = req.body;
//     const panImage = req.file;

//     if (!pan || !panImage) {
//       return res.status(400).json({ verified: false, message: "PAN and image are required" });
//     }

//     // Validate PAN format
//     const panFormatRegex = /^[A-Z]{5}[0-9]{4}[A-Z]{1}$/;
//     if (!panFormatRegex.test(pan)) {
//       return res.status(200).json({ verified: false, message: "Invalid PAN format" });
//     }

//     // Prepare form data to send image buffer to Python OCR server
//     const formData = new FormData();
//     formData.append("image", panImage.buffer, panImage.originalname);

//     // Send POST request to Python OCR server
//     const ocrResponse = await axios.post(
//       "https://api.vvet.in/extract-text",
//       formData,
//       {
//         headers: formData.getHeaders(),
//       }
//     );

//     const extractedText = ocrResponse.data.text || "";
//     console.log("Extracted Text from OCR:", extractedText);

//     if (!extractedText.toUpperCase().includes(pan.toUpperCase())) {
//       return res.status(200).json({ verified: false, message: "PAN not found in image" });
//     }

//     return res.status(200).json({ verified: true, message: "PAN verified successfully" });
//   } catch (error) {
//     console.error("Error in /api/verify-pan:", error);
//     return res.status(500).json({ verified: false, message: "Internal server error" });
//   }
// });

// // Fundraising submission API (example)
// app.post("/api/fundraising/submit", upload.fields([
//   { name: "feeDoc", maxCount: 1 },
//   { name: "medicalPhoto", maxCount: 1 },
//   { name: "medicalDoc", maxCount: 1 },
//   { name: "document", maxCount: 1 },
// ]), async (req, res) => {
//   try {
//     const formData = req.body;
//     const files = req.files;

//     console.log("Received form data:", formData);
//     console.log("Received files:", files ? Object.keys(files) : "No files uploaded");

//     if (!db) {
//       return res.status(500).json({ message: "DB connection not available" });
//     }

//     const sql = `INSERT INTO fundraising
//       (name, email, phone, category, feeDoc_name, medicalPhoto_name, medicalDoc_name, document_name)
//       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`;

//     const values = [
//       formData.name || null,
//       formData.email || null,
//       formData.phone || null,
//       formData.category || null,
//       files?.feeDoc?.[0]?.originalname || null,
//       files?.medicalPhoto?.[0]?.originalname || null,
//       files?.medicalDoc?.[0]?.originalname || null,
//       files?.document?.[0]?.originalname || null,
//     ];

//     await db.query(sql, values);

//     return res.status(200).json({ message: "Fundraising form submitted successfully" });
//   } catch (error) {
//     console.error("Error in /api/fundraising/submit:", error);
//     return res.status(500).json({ message: "Internal server error" });
//   }
// });

// // Start the server
// app.listen(PORT, () => {
//   console.log(`Server running on http://localhost:${PORT}`);
// });
const express = require("express");
const multer = require("multer");
const axios = require("axios");
const cors = require("cors");
const mysql = require("mysql2/promise");
const FormData = require("form-data");
const extractDocumentRoute = require("./routes/extractDocument");


const app = express();
const PORT = 5002;

app.use(express.json());
app.use(cors());
app.use("/api", extractDocumentRoute);


// Use multer memory storage for file uploads
const upload = multer({ storage: multer.memoryStorage() });

// MySQL connection config — keys must be lowercase for mysql2
const dbConfig = {
  host: "122.166.69.162",
  user: "rootuser",
  password: "1234",
  database: "vvvet",
  port: 3306, // Default MySQL port; change if needed
};

let db;
(async () => {
  try {
    db = await mysql.createPool(dbConfig);
    console.log("Connected to MySQL DB");
  } catch (err) {
    console.error("MySQL connection error:", err);
  }
})();

// PAN verification API
app.post("/api/verify-pan", upload.single("panImage"), async (req, res) => {
  try {
    const { pan } = req.body;
    const panImage = req.file;

    if (!pan || !panImage) {
      return res.status(400).json({ verified: false, message: "PAN and image are required" });
    }

    // Validate PAN format
    const panFormatRegex = /^[A-Z]{5}[0-9]{4}[A-Z]{1}$/;
    if (!panFormatRegex.test(pan)) {
      return res.status(200).json({ verified: false, message: "Invalid PAN format" });
    }

    // Prepare form data to send image buffer to Python OCR server
    const formData = new FormData();
    formData.append("image", panImage.buffer, panImage.originalname);

    // Send POST request to Python OCR server
    const ocrResponse = await axios.post(
      "https://api.vvet.in/extract-text",
      formData,
      {
        headers: formData.getHeaders(),
      }
    );

    const extractedText = ocrResponse.data.text || "";
    console.log("Extracted Text from OCR:", extractedText);

    if (!extractedText.toUpperCase().includes(pan.toUpperCase())) {
      return res.status(200).json({ verified: false, message: "PAN not found in image" });
    }

    return res.status(200).json({ verified: true, message: "PAN verified successfully" });
  } catch (error) {
    console.error("Error in /api/verify-pan:", error);
    return res.status(500).json({ verified: false, message: "Internal server error" });
  }
});

// Fundraising submission API
// app.post(
//   "/api/fundraising/submit",
//   upload.fields([
//     { name: "feeDoc", maxCount: 1 },
//     { name: "medicalPhoto", maxCount: 1 },
//     { name: "medicalDoc", maxCount: 1 },
//     { name: "document", maxCount: 1 },
//     { name: "panImage", maxCount: 1 },
//   ]),
//   async (req, res) => {
//     try {
//       const formData = req.body;
//       const files = req.files;

//       console.log("Received form data:", formData);
//       console.log("Received files:", files ? Object.keys(files) : "No files uploaded");

//       if (!db) {
//         return res.status(500).json({ message: "DB connection not available" });
//       }

//       const sql = `INSERT INTO fundraisings
//         (name, email, phone, category, feeDoc_name, medicalPhoto_name, medicalDoc_name, document_name)
//         VALUES (?, ?, ?, ?, ?, ?, ?, ?)`;

//       const values = [
//         formData.name || null,
//         formData.email || null,
//         formData.phone || null,
//         formData.category || null,
//         files?.fee_Doc?.[0]?.originalname || null,
//         files?.medical_Photo?.[0]?.originalname || null,
//         files?.medical_Doc?.[0]?.originalname || null,
//         files?.document?.[0]?.originalname || null,
//         files?.panImage?.[0]?.originalname || null,
//       ];

//       await db.query(sql, values);

//       return res.status(200).json({ message: "Fundraising form submitted successfully" });
//     } catch (error) {
//       console.error("Error in /api/fundraising/submit:", error);
//       return res.status(500).json({ message: "Internal server error" });
//     }
//   }
// );

app.post(
    "/api/fundraising/submit",
    upload.fields([
      { name: "feeDoc", maxCount: 1 },
      { name: "medicalPhoto", maxCount: 1 },
      { name: "medicalDoc", maxCount: 1 },
      { name: "document", maxCount: 1 },
      { name: "panImage", maxCount: 1 },
    ]),
    async (req, res) => {
      try {
        const formData = req.body;
        const files = req.files;
  
        console.log("Received form data:", formData);
        console.log("Received files:", files ? Object.keys(files) : "No files uploaded");
  
        if (!db) {
          return res.status(500).json({ message: "DB connection not available" });
        }
  
        const sql = `INSERT INTO fundraisings (
            name, email, phone, age, dob, category, pan_number, pan_document,
            fee_document,
            medical_document, 
            other_document, 
            transaction_screenshot, 
            fundraising_amount, bank_account_holder_name, bank_name, bank_account_number, ifsc_code
          ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,?, ?, ?, ?, ? )`;
          
  
          const values = [
            formData.name || null,
            formData.email || null,
            formData.phone || null,
            formData.age || null,
            formData.dob || null,
            formData.category || null,
            formData.pan || null,
            files?.panImage?.[0]?.originalname || null,
            files?.feeDoc?.[0]?.originalname || null,
            files?.medicalDoc?.[0]?.originalname || null,
            files?.document?.[0]?.originalname || null,
            files?.transactionScreenshot?.[0]?.originalname || null,
            formData.fundAmount || null,
            formData.bankHolderName || null,
            formData.bankName || null,
            formData.accountNumber || null,
            formData.ifscCode || null
          ];
  
        await db.query(sql, values);
  
        return res.status(200).json({ message: "Fundraising form submitted successfully" });
      } catch (error) {
        console.error("Error in /api/fundraising/submit:", error);
        return res.status(500).json({ message: "Internal server error" });
      }
    }
  );
//donor submission API
// Donor submission API
app.post(
    "/api/donor/submit",
    upload.fields([
      { name: "panImage", maxCount: 1 },
      { name: "transactionScreenshot", maxCount: 1 },
    ]),
    async (req, res) => {
      try {
        const formData = req.body;
        const files = req.files;
  
        if (!db) {
          return res.status(500).json({ message: "DB connection not available" });
        }
  
        const sql = `INSERT INTO donors (
          name, email, phone, age, dob, pan_number, pan_document, 
          bank_account_holder_name, bank_name, bank_account_number, ifsc_code,
          donation_amount, payment, transaction_screenshot
        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`;
  
        const values = [
          formData.name || null,
          formData.email || null,
          formData.phone || null,
          formData.age || null,
          formData.dob || null,
          formData.pan || null,
          files?.panImage?.[0]?.originalname || null,
          formData.bankHolderName || null,
          formData.bankName || null,
          formData.accountNumber || null,
          formData.ifscCode || null,
          formData.donation_Amount || null,
          formData.payment|| null,
          files?.transactionScreenshot?.[0]?.originalname || null,
        ];
  
        await db.query(sql, values);
  
        return res.status(200).json({ message: "Donor form submitted successfully" });
      } catch (error) {
        console.error("Error in /api/donor/submit:", error);
        return res.status(500).json({ message: "Internal server error" });
      }
    }
  );


// Start the server
app.listen(PORT, () => {
  console.log(`Server running on http://localhost:${PORT}`);
});