package ws

import (
	"net/http/httptest"
	"testing"
)

// Test the remote address parsing logic which is the main testable functionality
func TestListenerSetRemoteFromReq(t *testing.T) {
	tests := []struct {
		name           string
		remoteAddr     string
		xForwardedFor  string
		expectedRemote string
	}{
		{
			name:           "No X-Forwarded-For header",
			remoteAddr:     "192.168.1.1:8080",
			xForwardedFor:  "",
			expectedRemote: "192.168.1.1:8080",
		},
		{
			name:           "Single X-Forwarded-For",
			remoteAddr:     "192.168.1.1:8080",
			xForwardedFor:  "203.0.113.1",
			expectedRemote: "203.0.113.1",
		},
		{
			name:           "Double X-Forwarded-For",
			remoteAddr:     "192.168.1.1:8080",
			xForwardedFor:  "203.0.113.1 198.51.100.1",
			expectedRemote: "198.51.100.1",
		},
		{
			name:           "Empty X-Forwarded-For",
			remoteAddr:     "192.168.1.1:8080",
			xForwardedFor:  "",
			expectedRemote: "192.168.1.1:8080",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			// Create a test listener to access the setRemoteFromReq method
			listener := &Listener{}

			req := httptest.NewRequest("GET", "/", nil)
			req.RemoteAddr = tt.remoteAddr
			if tt.xForwardedFor != "" {
				req.Header.Set("X-Forwarded-For", tt.xForwardedFor)
			}

			// Call the method we want to test
			listener.setRemoteFromReq(req)

			if listener.RealRemote() != tt.expectedRemote {
				t.Errorf("Expected remote address to be '%s', got '%s'", tt.expectedRemote, listener.RealRemote())
			}
		})
	}
}

// Test that Req() returns the stored request
func TestListenerReq(t *testing.T) {
	req := httptest.NewRequest("GET", "/test", nil)
	listener := &Listener{Request: req}

	if listener.Req() != req {
		t.Error("Expected Req() to return the stored request")
	}
}

// Test RealRemote method
func TestListenerRealRemote(t *testing.T) {
	listener := &Listener{}
	listener.remote.Store("test-remote-address")

	if listener.RealRemote() != "test-remote-address" {
		t.Errorf("Expected RealRemote() to return 'test-remote-address', got '%s'", listener.RealRemote())
	}
}