// 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 clipboard

import (
	"context"
	"errors"
	"testing"
	"time"

	"git.stormux.org/storm/fenrir/internal/command"
)

func TestQueuedPasteCannotStartAfterTargetRetirement(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	called := false
	worker := &Worker{jobs: make(chan queuedRequest, 1), results: make(chan Result, 1), ctx: ctx, cancel: cancel, done: make(chan struct{}), paste: func(context.Context, string, int) error { called = true; return nil }}
	worker.Submit(Request{Command: command.PasteClipboard, Text: "old target", Terminal: 2})
	worker.Cancel()
	go worker.run()
	defer worker.Close()
	select {
	case result := <-worker.Results():
		if called || !errors.Is(result.Err, context.Canceled) {
			t.Fatal(called, result.Err)
		}
	case <-time.After(time.Second):
		t.Fatal("canceled paste did not finish")
	}
}

func TestActivePasteCancellationDoesNotBlockShutdown(t *testing.T) {
	started := make(chan struct{})
	worker := New_worker(context.Background(), func(ctx context.Context, text string, terminal int) error {
		close(started)
		<-ctx.Done()
		return ctx.Err()
	})
	worker.Submit(Request{Command: command.PasteClipboard, Text: "target", Terminal: 2})
	select {
	case <-started:
	case <-time.After(time.Second):
		t.Fatal("paste did not start")
	}
	worker.Cancel()
	select {
	case result := <-worker.Results():
		if !errors.Is(result.Err, context.Canceled) {
			t.Fatal(result.Err)
		}
	case <-time.After(time.Second):
		t.Fatal("paste did not cancel")
	}
	worker.Close()
}