main.go

package main

import (
	"log"
	"net/http"
	"os"

	hosthttp "github.com/Bofry/host-http"
	"github.com/Bofry/host-http/response"
	"github.com/Bofry/host-http/response/failure"
)

// APIRequest demonstrates middleware chain usage
type APIRequest struct{}

// Get handles GET requests with full middleware processing
func (r *APIRequest) Get(w http.ResponseWriter, req *http.Request) {
	response.JSON.Success(w, map[string]any{
		"message": "Middleware chain working!",
		"path":    req.URL.Path,
		"method":  req.Method,
	})
}

// RequestManager defines the routes
type RequestManager struct {
	*APIRequest `url:"/api"`
}

func main() {
	app := &App{}

	// Print tracing configuration for demonstration
	tracingEnabled := os.Getenv("TRACING_ENABLED")
	serviceName := os.Getenv("SERVICE_NAME")
	jaegerEndpoint := os.Getenv("JAEGER_ENDPOINT")

	log.Printf("=== Tracing Configuration ===")
	log.Printf("TRACING_ENABLED: %s (default: false)", tracingEnabled)
	log.Printf("SERVICE_NAME: %s (default: host-http-service)", serviceName)
	log.Printf("JAEGER_ENDPOINT: %s (default: http://localhost:14268/api/traces)", jaegerEndpoint)
	log.Printf("===========================")

	if tracingEnabled == "true" {
		log.Printf("OpenTelemetry tracing enabled - traces will be sent to Jaeger")
	} else {
		log.Printf("Tracing disabled - using structured slog for observability")
	}

	// Demonstrate comprehensive middleware chain with tracing
	hosthttp.Startup(app).
		Middlewares(
			// Add tracing middleware first to capture the entire request lifecycle
			hosthttp.UseTracing(
				hosthttp.WithSkipPaths("/health", "/metrics"),
				hosthttp.WithCORSMerging(true), // Merge CORS preflight with actual requests
			),
			hosthttp.UseRequestManager(&RequestManager{}),
			hosthttp.UseCorsHeader("X-API-Key", "X-Trace-ID"),
			hosthttp.UseLogging(),
			hosthttp.UseErrorHandler(func(w http.ResponseWriter, r *http.Request, err any) {
				log.Printf("Error occurred: %v", err)
				if fail, ok := err.(*failure.Failure); ok {
					response.JSON.Failure(w, fail, http.StatusBadRequest)
				} else {
					response.JSON.Failure(w, map[string]any{
						"message":    "Internal Server Error",
						"error":      "Server error",
						"trace_info": "Check logs or Jaeger for detailed trace information",
					}, http.StatusInternalServerError)
				}
			}),
		).
		Run()
}