// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later
package tentaclewire

import "testing"

func TestSessionNegotiationRequiresIndependentGrants(t *testing.T) {
	cases := []struct {
		name         string
		minor        int
		apis, grants []string
		valid        bool
	}{
		{"legacy", 0, []string{"commands", "presentation"}, []string{"commands", "presentation"}, true},
		{"legacy order", 0, []string{"presentation", "commands"}, []string{"presentation", "commands"}, false},
		{"events only", 1, []string{"session-events", "commands"}, nil, true},
		{"explicit sets", 1, []string{"remote-access", "interaction", "session-events", "commands", "presentation"}, []string{"output-observe", "interaction", "presentation"}, true},
		{"missing events", 1, []string{"remote-access", "commands"}, []string{"output-observe"}, false},
		{"grant without API", 1, []string{"session-events", "commands"}, []string{"output-observe"}, false},
		{"API without grant", 1, []string{"session-events", "commands", "remote-access"}, nil, false},
		{"unknown grant", 1, []string{"session-events", "commands", "remote-access"}, []string{"execute"}, false},
		{"duplicate grant", 1, []string{"session-events", "commands", "remote-access"}, []string{"output-observe", "output-observe"}, false},
		{"duplicate API", 1, []string{"session-events", "commands", "commands"}, nil, false},
		{"missing prerequisite", 1, []string{"session-events", "commands", "interaction"}, []string{"interaction"}, false},
		{"legacy capability in 1.1", 1, []string{"session-events", "commands"}, []string{"commands"}, false},
		{"future version", 2, []string{"session-events", "commands"}, nil, false},
	}
	for _, item := range cases {
		t.Run(item.name, func(t *testing.T) {
			if ValidNegotiation(item.minor, item.apis, item.grants) != item.valid {
				t.Fatal("wrong negotiation result")
			}
		})
	}
}