package callerauth

import (
	"context"
	"errors"
	"testing"
)

// IR-WP-0004 / WARDEN-WP-0039: a caller binding is representation,
// not delegated authority over another system's credentials.
func TestOpenRouterNativeCallerBoundary(t *testing.T) {
	bindings := map[string]string{
		"ops-warden":     "system:serviceaccount:ops-warden:ops-warden",
		"secrets-engine": "system:serviceaccount:secrets-engine:secrets-engine",
	}
	for _, tc := range []struct {
		name, caller string
		systems      []string
		denied       bool
	}{
		{"native lifecycle caller", bindings["secrets-engine"], []string{"secrets-engine"}, false},
		{"warden own system", bindings["ops-warden"], []string{"ops-warden"}, false},
		{"warden cannot represent custody owner", bindings["ops-warden"], []string{"railiance-platform"}, true},
		{"warden cannot impersonate native engine", bindings["ops-warden"], []string{"secrets-engine"}, true},
		{"radar is recipient not lifecycle caller", "system:serviceaccount:intelligence-radar:intelligence-radar", []string{"secrets-engine"}, true},
		{"native caller cannot represent custody owner", bindings["secrets-engine"], []string{"railiance-platform"}, true},
		{"batch must bind every owner", bindings["ops-warden"], []string{"ops-warden", "railiance-platform"}, true},
	} {
		t.Run(tc.name, func(t *testing.T) {
			auth, err := New(ModeEnforce, fakeReviewer{identity: Identity{Username: tc.caller, Audiences: []string{"flex-auth"}}}, "flex-auth", bindings, nil)
			if err != nil {
				t.Fatal(err)
			}
			err = auth.Authorize(context.Background(), "Bearer synthetic-caller", tc.systems)
			if tc.denied && !errors.Is(err, ErrForbidden) {
				t.Fatalf("want forbidden, got %v", err)
			}
			if !tc.denied && err != nil {
				t.Fatal(err)
			}
		})
	}
}