Add-API/main.go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
)

type HealthResponse struct {
	Status string `json:"status"`
}

type AddRequest struct {
	PinCode int `json:"pinCode"`
	N1      int `json:"n1"`
	N2      int `json:"n2"`
}

type AddResponse struct {
	Output int `json:"output"`
}

func healthHandler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(HealthResponse{Status: "healthy"})
}

func addHandler(w http.ResponseWriter, r *http.Request) {
	var req AddRequest
	err := json.NewDecoder(r.Body).Decode(&req)
	if err != nil {
		http.Error(w, "invalid json", http.StatusBadRequest)
		return
	}

	if req.PinCode != 1234 {
		http.Error(w, "unauthorized", http.StatusUnauthorized)
		return
	}

	result := req.N1 + req.N2
	resp := AddResponse{Output: result}

	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(resp)
}

func main() {
	http.HandleFunc("/health", healthHandler)
	http.HandleFunc("/add", addHandler)

	fmt.Println("Server running on port 8080...")
	http.ListenAndServe(":8080", nil)
}