server.ts

import express from "express";
import path from "path";
import { createServer as createViteServer } from "vite";

async function startServer() {
  const app = express();
  const PORT = 3000;

  app.use(express.json());

  // Mock External Crop Data for Oracle
  const externalCropData = {
    "BATCH_A1": { status: "Verified", quality: "Grade A", yield: 5000 },
    "BATCH_B2": { status: "Growing", quality: "Pending", yield: 2000 },
  };

  // Oracle Adapter API Endpoints
  app.get("/api/oracle/verify/:batchId", (req, res) => {
    const { batchId } = req.params;
    const data = externalCropData[batchId as keyof typeof externalCropData];
    
    if (data) {
      res.json({
        success: true,
        data,
        message: `Oracle verification for ${batchId} retrieved from satellite data.`
      });
    } else {
      res.status(404).json({ success: false, message: "Batch not found in external registry." });
    }
  });

  // Simulated trigger to on-chain release
  app.post("/api/oracle/trigger-payment", (req, res) => {
    const { batchId, milestoneIdx } = req.body;
    
    // In a real scenario, this is where you'd sign a Soroban transaction 
    // using a private key stored safely in environment variables.
    console.log(`ORACLE: Triggering on-chain payment for ${batchId}, milestone ${milestoneIdx}`);
    
    res.json({
      success: true,
      txId: `soroban_tx_mock_${Math.random().toString(36).substring(7)}`,
      status: "Triggered"
    });
  });

  app.get("/api/health", (req, res) => {
    res.json({ status: "ok", service: "AgroChain Oracle Adapter" });
  });

  if (process.env.NODE_ENV !== "production") {
    const vite = await createViteServer({
      server: { middlewareMode: true },
      appType: "spa",
    });
    app.use(vite.middlewares);
  } else {
    const distPath = path.join(process.cwd(), "dist");
    app.use(express.static(distPath));
    app.get("*", (req, res) => {
      res.sendFile(path.join(distPath, "index.html"));
    });
  }

  app.listen(PORT, "0.0.0.0", () => {
    console.log(`AgroChain Server running on http://localhost:${PORT}`);
  });
}

startServer();