using System;
using System.IO;
using System.Linq;
using System.Windows.Controls;
using Paca.App;
using Paca.Browser;
using Paca.Browser.Tabs;
using Paca.Tests.Infrastructure;
using Xunit;

namespace Paca.Tests.Browser;

public class ChromeParityMilestone7Tests
{
    private static TabManager CreateManager() => new(() => new TabItem());

    [Fact]
    public void TabManager_MoveTabLeft_And_Right_탭을_좌우로_이동한다()
    {
        var mgr = CreateManager();
        var t1 = mgr.NewTab("https://site1.com");
        var t2 = mgr.NewTab("https://site2.com");
        var t3 = mgr.NewTab("https://site3.com");

        // [t1, t2, t3] -> t2를 왼쪽으로 이동 -> [t2, t1, t3]
        mgr.MoveTabLeft(t2);
        Assert.Equal(t2, mgr.Tabs[0]);
        Assert.Equal(t1, mgr.Tabs[1]);
        Assert.Equal(t3, mgr.Tabs[2]);

        // t2는 이미 맨 왼쪽(0)이므로 더 왼쪽으로 가도 0 유지
        mgr.MoveTabLeft(t2);
        Assert.Equal(t2, mgr.Tabs[0]);

        // t2를 오른쪽으로 2번 이동 -> [t1, t3, t2]
        mgr.MoveTabRight(t2);
        mgr.MoveTabRight(t2);
        Assert.Equal(t1, mgr.Tabs[0]);
        Assert.Equal(t3, mgr.Tabs[1]);
        Assert.Equal(t2, mgr.Tabs[2]);

        // t2는 이미 맨 오른쪽이므로 더 오른쪽으로 가도 마지막 유지
        mgr.MoveTabRight(t2);
        Assert.Equal(t2, mgr.Tabs[2]);
    }

    [Fact]
    public void TabManager_MoveActiveTabLeft_And_Right_활성탭을_좌우로_이동한다()
    {
        var mgr = CreateManager();
        var t1 = mgr.NewTab("https://site1.com");
        var t2 = mgr.NewTab("https://site2.com");
        var t3 = mgr.NewTab("https://site3.com");

        mgr.Activate(t3);
        mgr.MoveActiveTabLeft(); // t3을 2번에서 1번 인덱스로

        Assert.Equal(t1, mgr.Tabs[0]);
        Assert.Equal(t3, mgr.Tabs[1]);
        Assert.Equal(t2, mgr.Tabs[2]);
        Assert.Same(t3, mgr.ActiveTab);
    }

    [Theory]
    [InlineData("https://example.com/doc", "hello world", "https://example.com/doc#:~:text=hello%20world")]
    [InlineData("https://example.com/doc", "alpha-beta, gamma & delta", "https://example.com/doc#:~:text=alpha%2Dbeta%2C%20gamma%20%26%20delta")]
    public void TextFragmentHelper_Generate_W3C_사양에_맞게_인코딩한다(string url, string text, string expected)
    {
        var link = TextFragmentHelper.Generate(url, text);
        Assert.Equal(expected, link);
    }

    [Fact]
    public void TextFragmentHelper_TryParse_프래그먼트_텍스트를_정확히_추출한다()
    {
        var url = "https://example.com/doc#:~:text=alpha%2Dbeta%2C%20gamma%20%26%20delta";
        var success = TextFragmentHelper.TryParse(url, out var text);
        Assert.True(success);
        Assert.Equal("alpha-beta, gamma & delta", text);
    }

    [Fact]
    public void BuildTabContextMenu_탭_좌우_이동_옵션이_포함된다()
    {
        using var sta = StaDispatcher.Start();
        WpfTestApp.Ensure(sta.Dispatcher);
        sta.Invoke(() =>
        {
            var dataDir = Path.Combine(Path.GetTempPath(), $"vd_tab_move_{Guid.NewGuid():N}");
            Environment.SetEnvironmentVariable("VD_DATA_DIR", dataDir);
            try
            {
                var win = new MainWindow();
                win.TabsManager.Tabs.Clear();
                var t1 = win.TabsManager.NewTab("https://site1.com");
                var t2 = win.TabsManager.NewTab("https://site2.com");

                var menu = win.BuildTabContextMenu(t1);
                var items = menu.Items.OfType<MenuItem>().Select(m => m.Header?.ToString()).ToList();

                Assert.Contains("탭을 왼쪽으로 이동", items);
                Assert.Contains("탭을 오른쪽으로 이동", items);
            }
            finally
            {
                try { if (Directory.Exists(dataDir)) Directory.Delete(dataDir, true); } catch { }
            }
        });
    }
}