package router

import (
	"net/http"

	"aws-sts-mock/internal/handler"
)

// Router handles HTTP routing
type Router struct {
	s3Handler       *handler.S3Handler
	stsHandler      *handler.STSHandler
	healthHandler   *handler.HealthHandler
	sigv4Middleware func(http.HandlerFunc) http.HandlerFunc
}

// New creates a new router
func New(
	s3Handler *handler.S3Handler,
	stsHandler *handler.STSHandler,
	healthHandler *handler.HealthHandler,
	sigv4Middleware func(http.HandlerFunc) http.HandlerFunc,
) http.Handler {
	r := &Router{
		s3Handler:       s3Handler,
		stsHandler:      stsHandler,
		healthHandler:   healthHandler,
		sigv4Middleware: sigv4Middleware,
	}

	mux := http.NewServeMux()

	// Health check endpoint - without SigV4 validation
	mux.HandleFunc("/health", r.healthHandler.Handle)

	// Main handler with SigV4 validation
	mux.HandleFunc("/", r.sigv4Middleware(r.handleRequest))

	return mux
}

// handleRequest routes requests to appropriate handlers
func (r *Router) handleRequest(w http.ResponseWriter, req *http.Request) {
	// STS requests have Action parameter
	if req.Method == "POST" && req.FormValue("Action") != "" {
		r.stsHandler.Handle(w, req)
		return
	}

	// Otherwise, treat as S3 request
	r.s3Handler.Handle(w, req)
}