using System.Collections.Generic;
using System.Linq;
using Paca.Browser.Tabs;
using Xunit;

namespace Paca.Tests.Browser;

public class ChromeParityTabOperationsTests
{
    private static TabManager CreateManager()
    {
        return new TabManager(() => new TabItem());
    }

    [Fact]
    public void NewTabAfter_기준_탭의_바로_오른쪽에_새_탭을_삽입하고_활성화한다()
    {
        var mgr = CreateManager();
        var tabA = mgr.NewTab("https://a.com");
        var tabB = mgr.NewTab("https://b.com");
        var tabC = mgr.NewTab("https://c.com");

        // [A, B, C] 상태에서 B 바로 뒤에 새 탭 삽입
        var newTab = mgr.NewTabAfter(tabB, "https://b2.com", activate: true);

        Assert.Equal(4, mgr.Tabs.Count);
        Assert.Equal(tabA, mgr.Tabs[0]);
        Assert.Equal(tabB, mgr.Tabs[1]);
        Assert.Equal(newTab, mgr.Tabs[2]);
        Assert.Equal(tabC, mgr.Tabs[3]);
        Assert.Equal("https://b2.com", newTab.Url);
        Assert.Same(newTab, mgr.ActiveTab);
    }

    [Fact]
    public void NewTabAfter_마지막_탭_뒤에_추가하면_맨_뒤에_배치된다()
    {
        var mgr = CreateManager();
        var tabA = mgr.NewTab("https://a.com");
        var tabB = mgr.NewTab("https://b.com");

        var newTab = mgr.NewTabAfter(tabB, "https://new.com");

        Assert.Equal(3, mgr.Tabs.Count);
        Assert.Equal(newTab, mgr.Tabs[2]);
    }

    [Fact]
    public void DuplicateTab_현재_탭의_URL과_제목을_복제하여_바로_우측에_생성한다()
    {
        var mgr = CreateManager();
        var tab1 = mgr.NewTab("https://github.com");
        tab1.Title = "GitHub - Paca";
        var tab2 = mgr.NewTab("https://google.com");

        var dup = mgr.DuplicateTab(tab1);

        Assert.NotNull(dup);
        Assert.Equal(3, mgr.Tabs.Count);
        Assert.Equal(tab1, mgr.Tabs[0]);
        Assert.Equal(dup, mgr.Tabs[1]);
        Assert.Equal(tab2, mgr.Tabs[2]);
        Assert.Equal("https://github.com", dup.Url);
        Assert.Equal("GitHub - Paca", dup.Title);
        Assert.Same(dup, mgr.ActiveTab);
    }

    [Fact]
    public void CloseOtherTabs_대상_탭을_제외한_모든_탭을_닫으며_잠긴_탭은_보존한다()
    {
        var mgr = CreateManager();
        var tabA = mgr.NewTab("https://a.com");
        var tabB = mgr.NewTab("https://b.com");
        var tabC = mgr.NewTab("https://c.com");
        var tabD = mgr.NewTab("https://d.com");

        // C는 잠금 상태
        tabC.IsLocked = true;

        // B를 제외한 다른 탭 닫기
        int closedCount = mgr.CloseOtherTabs(tabB);

        // A와 D만 닫혀야 함 (C는 잠금이라 생존)
        Assert.Equal(2, closedCount);
        Assert.Equal(2, mgr.Tabs.Count);
        Assert.Contains(tabB, mgr.Tabs);
        Assert.Contains(tabC, mgr.Tabs);
        Assert.DoesNotContain(tabA, mgr.Tabs);
        Assert.DoesNotContain(tabD, mgr.Tabs);
        Assert.Same(tabB, mgr.ActiveTab);

        // 닫힌 탭들은 닫힌 스택에 보존되어 복원 가능해야 함
        Assert.Equal(2, mgr.ClosedStack.Count);
    }

    [Fact]
    public void CloseTabsToTheRight_오른쪽_탭들만_닫으며_잠긴_탭은_보존한다()
    {
        var mgr = CreateManager();
        var tab1 = mgr.NewTab("https://1.com");
        var tab2 = mgr.NewTab("https://2.com");
        var tab3 = mgr.NewTab("https://3.com");
        var tab4 = mgr.NewTab("https://4.com");
        var tab5 = mgr.NewTab("https://5.com");

        // tab4는 잠금 상태
        tab4.IsLocked = true;

        // tab2 기준 오른쪽 탭 닫기
        int closedCount = mgr.CloseTabsToTheRight(tab2);

        // tab3, tab5가 닫혀야 함 (tab4는 잠금이라 보존)
        Assert.Equal(2, closedCount);
        Assert.Equal(3, mgr.Tabs.Count);
        Assert.Equal(tab1, mgr.Tabs[0]);
        Assert.Equal(tab2, mgr.Tabs[1]);
        Assert.Equal(tab4, mgr.Tabs[2]);
        Assert.Same(tab2, mgr.ActiveTab);
    }

    [Fact]
    public void ReopenClosedTab_CloseOtherTabs로_닫힌_탭들을_역순으로_완전_복원한다()
    {
        var mgr = CreateManager();
        var tabA = mgr.NewTab("https://a.com");
        var tabB = mgr.NewTab("https://b.com");
        var tabC = mgr.NewTab("https://c.com");

        mgr.CloseOtherTabs(tabA);
        Assert.Single(mgr.Tabs);

        // Ctrl+Shift+T 2회 실행으로 복원
        var restored1 = mgr.ReopenClosedTab();
        var restored2 = mgr.ReopenClosedTab();

        Assert.NotNull(restored1);
        Assert.NotNull(restored2);
        Assert.Equal(3, mgr.Tabs.Count);
    }

    [Fact]
    public void MainWindow_TabContextMenu는_크롬_표준_옵션들이_모두_포함된다()
    {
        using var sta = Paca.Tests.Infrastructure.StaDispatcher.Start();
        Paca.Tests.Infrastructure.WpfTestApp.Ensure(sta.Dispatcher);
        sta.Invoke(() =>
        {
            var dataDir = System.IO.Path.Combine(System.IO.Path.GetTempPath(), $"vd_chrometab_{System.Guid.NewGuid():N}");
            System.Environment.SetEnvironmentVariable("VD_DATA_DIR", dataDir);
            try
            {
                var win = new Paca.App.MainWindow();
                var tab = new TabItem { Title = "테스트 탭", Url = "https://example.com" };
                
                var menu = win.BuildTabContextMenu(tab);
                Assert.NotNull(menu);

                var headers = menu.Items.OfType<System.Windows.Controls.MenuItem>().Select(m => m.Header?.ToString()).ToList();
                Assert.Contains("오른쪽에 새 탭", headers);
                Assert.Contains("탭 복제", headers);
                Assert.Contains("다른 탭 닫기", headers);
                Assert.Contains("오른쪽 탭 닫기", headers);
                Assert.Contains("탭 닫기", headers);
            }
            finally
            {
                try { if (System.IO.Directory.Exists(dataDir)) System.IO.Directory.Delete(dataDir, true); } catch { }
            }
        });
    }
}