// Fenrir console screen reader.
// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.

package speech

import (
	"bytes"
	"log/slog"
	"strings"
	"testing"
	"time"
)

func TestTimingDiagnosticsExcludeSpeechText(t *testing.T) {
	var output bytes.Buffer
	previousLogger := slog.Default()
	slog.SetDefault(slog.New(slog.NewTextHandler(&output, &slog.HandlerOptions{Level: slog.LevelDebug})))
	defer slog.SetDefault(previousLogger)
	fake := new_recording_transport()
	s := New(fake)
	defer s.Close()
	const privateText = "private speech fixture"
	s.Interrupt()
	s.Say(privateText)
	wait_event(t, fake.changed, "sent:"+privateText)
	s.Close()
	if strings.Contains(output.String(), privateText) {
		t.Fatal("timing diagnostics included speech text")
	}
	for _, stage := range []string{"speech queue wait", "speech send", "speech cancel barrier"} {
		if !strings.Contains(output.String(), stage) {
			t.Fatalf("missing timing stage %q", stage)
		}
	}
}

type latencyTransport struct {
	sent chan struct{}
}

func (f *latencyTransport) Say(string) error           { f.sent <- struct{}{}; return nil }
func (f *latencyTransport) Cancel() error              { time.Sleep(time.Millisecond); return nil }
func (f *latencyTransport) Close()                     {}
func (f *latencyTransport) Set_pitch(int) error        { return nil }
func (f *latencyTransport) Configure(Parameters) error { return nil }

// Model a fixed acknowledgement cost to expose unnecessary cancellation waits.
// This measures admission/transport scheduling, not audible speech latency.
func BenchmarkIdleInterruptToSpeech(b *testing.B) {
	fake := &latencyTransport{sent: make(chan struct{})}
	s := New(fake)
	defer s.Close()
	for b.Loop() {
		s.Interrupt()
		s.Say("response")
		<-fake.sent
	}
}