using System.IO;
using System.Linq;
using Paca.Browser.Tabs;
using Xunit;

namespace Paca.Tests.Browser;

public class ChromeTabGroupAdvancedTests
{
    [Fact]
    public void ChromeTabGroupPalette_Contains_Nine_Official_Colors()
    {
        var colors = ChromeTabGroupPalette.Presets;
        Assert.Equal(9, colors.Count);
        Assert.Contains(colors, c => c.Name == "Blue" && c.Hex == "#1A73E8");
        Assert.Contains(colors, c => c.Name == "Red" && c.Hex == "#D93025");
        Assert.Contains(colors, c => c.Name == "Yellow" && c.Hex == "#F9AB00");
        Assert.Contains(colors, c => c.Name == "Green" && c.Hex == "#188038");
        Assert.Contains(colors, c => c.Name == "Pink" && c.Hex == "#E52592");
        Assert.Contains(colors, c => c.Name == "Purple" && c.Hex == "#A142F4");
        Assert.Contains(colors, c => c.Name == "Cyan" && c.Hex == "#007B83");
        Assert.Contains(colors, c => c.Name == "Orange" && c.Hex == "#E37400");
        Assert.Contains(colors, c => c.Name == "Grey" && c.Hex == "#5F6368");

        Assert.Equal("#1A73E8", ChromeTabGroupPalette.Normalize("blue"));
        Assert.Equal("#D93025", ChromeTabGroupPalette.Normalize("#d93025"));
        Assert.Equal("#5F6368", ChromeTabGroupPalette.Normalize("invalid-color"));
    }

    [Fact]
    public void MoveGroup_Moves_Entire_Group_Of_Tabs_Atomically()
    {
        var mgr = new TabManager(() => new TabItem());
        var t0 = mgr.NewTab("https://a.com");
        var t1 = mgr.NewTab("https://b.com");
        var t2 = mgr.NewTab("https://c.com");
        var t3 = mgr.NewTab("https://d.com");
        var t4 = mgr.NewTab("https://e.com");

        mgr.SetGroup(t1, "Group1", "#1A73E8");
        mgr.SetGroup(t2, "Group1", "#1A73E8");

        // Initial order: t0, t1, t2, t3, t4
        Assert.Equal(new[] { t0, t1, t2, t3, t4 }, mgr.Tabs);

        // Move Group1 to start at index 2 (after t3)
        bool moved = mgr.MoveGroup("Group1", 2);
        Assert.True(moved);

        // New order should have t1, t2 together starting at index 2: t0, t3, t1, t2, t4
        Assert.Equal(new[] { t0, t3, t1, t2, t4 }, mgr.Tabs);
    }

    [Fact]
    public void Activating_Tab_In_Collapsed_Group_Expands_Group_Automatically()
    {
        var mgr = new TabManager(() => new TabItem());
        var t0 = mgr.NewTab("https://home.com");
        var t1 = mgr.NewTab("https://work1.com");
        var t2 = mgr.NewTab("https://work2.com");

        mgr.SetGroup(t1, "Work", "#1A73E8");
        mgr.SetGroup(t2, "Work", "#1A73E8");

        mgr.ToggleGroupCollapsed("Work");
        Assert.True(t1.IsGroupCollapsed);
        Assert.True(t2.IsGroupCollapsed);

        // Activating a collapsed tab expands its entire group
        mgr.Activate(t1);
        Assert.Same(t1, mgr.ActiveTab);
        Assert.False(t1.IsGroupCollapsed);
        Assert.False(t2.IsGroupCollapsed);
    }

    [Fact]
    public void TabSessionStore_Preserves_Tab_Groups_And_Collapsed_State()
    {
        var tmp = Path.Combine(Path.GetTempPath(), $"paca_session_{System.Guid.NewGuid():N}.json");
        try
        {
            var mgr1 = new TabManager(() => new TabItem());
            var t0 = mgr1.NewTab("https://home.com");
            var t1 = mgr1.NewTab("https://work1.com");
            var t2 = mgr1.NewTab("https://work2.com");

            mgr1.SetGroup(t1, "Work", "#1A73E8");
            mgr1.SetGroup(t2, "Work", "#1A73E8");
            mgr1.ToggleGroupCollapsed("Work");
            mgr1.Activate(t0); // Keep active tab outside collapsed group so it stays collapsed on restore

            var snap = mgr1.CaptureSession();
            TabSessionStore.Save(tmp, snap);

            var loadedSnap = TabSessionStore.Load(tmp);
            Assert.NotNull(loadedSnap);

            var mgr2 = new TabManager(() => new TabItem());
            mgr2.RestoreSession(loadedSnap);

            Assert.Equal(3, mgr2.Tabs.Count);
            Assert.Null(mgr2.Tabs[0].GroupName);
            Assert.Equal("Work", mgr2.Tabs[1].GroupName);
            Assert.Equal("#1A73E8", mgr2.Tabs[1].GroupColor);
            Assert.True(mgr2.Tabs[1].IsGroupCollapsed);
            Assert.Equal("Work", mgr2.Tabs[2].GroupName);
            Assert.Equal("#1A73E8", mgr2.Tabs[2].GroupColor);
            Assert.True(mgr2.Tabs[2].IsGroupCollapsed);
        }
        finally
        {
            if (File.Exists(tmp)) File.Delete(tmp);
        }
    }
}