using Dalamud.Interface;
using Dalamud.Interface.Utility;
using ImGuiNET;
using OtterGui;
using OtterGui.Raii;
using System;
using System.Linq;
using System.Numerics;
using CustomizePlus.Profiles;
using CustomizePlus.Configuration.Data;
using CustomizePlus.Profiles.Data;
using CustomizePlus.UI.Windows.Controls;
using CustomizePlus.Templates;
using CustomizePlus.Core.Data;
using CustomizePlus.Templates.Events;

namespace CustomizePlus.UI.Windows.MainWindow.Tabs.Profiles;

public class ProfilePanel
{
    private readonly ProfileFileSystemSelector _selector;
    private readonly ProfileManager _manager;
    private readonly PluginConfiguration _configuration;
    private readonly TemplateCombo _templateCombo;
    private readonly TemplateEditorManager _templateEditorManager;
    private readonly TemplateEditorEvent _templateEditorEvent;

    private string? _newName;
    private string? _newCharacterName;
    private Profile? _changedProfile;

    private Action? _endAction;

    private int _dragIndex = -1;

    private string SelectionName
        => _selector.Selected == null ? "No Selection" : _selector.IncognitoMode ? _selector.Selected.Incognito : _selector.Selected.Name.Text;

    public ProfilePanel(
        ProfileFileSystemSelector selector,
        ProfileManager manager,
        PluginConfiguration configuration,
        TemplateCombo templateCombo,
        TemplateEditorManager templateEditorManager,
        TemplateEditorEvent templateEditorEvent)
    {
        _selector = selector;
        _manager = manager;
        _configuration = configuration;
        _templateCombo = templateCombo;
        _templateEditorManager = templateEditorManager;
        _templateEditorEvent = templateEditorEvent;
    }

    public void Draw()
    {
        using var group = ImRaii.Group();
        if (_selector.SelectedPaths.Count > 1)
        {
            DrawMultiSelection();
        }
        else
        {
            DrawHeader();
            DrawPanel();
        }
    }

    private HeaderDrawer.Button LockButton()
        => _selector.Selected == null
            ? HeaderDrawer.Button.Invisible
            : _selector.Selected.IsWriteProtected
                ? new HeaderDrawer.Button
                {
                    Description = "Make this profile editable.",
                    Icon = FontAwesomeIcon.Lock,
                    OnClick = () => _manager.SetWriteProtection(_selector.Selected!, false)
                }
                : new HeaderDrawer.Button
                {
                    Description = "Write-protect this profile.",
                    Icon = FontAwesomeIcon.LockOpen,
                    OnClick = () => _manager.SetWriteProtection(_selector.Selected!, true)
                };

    private void DrawHeader()
        => HeaderDrawer.Draw(SelectionName, 0, ImGui.GetColorU32(ImGuiCol.FrameBg),
            0, LockButton(),
            HeaderDrawer.Button.IncognitoButton(_selector.IncognitoMode, v => _selector.IncognitoMode = v));

    private void DrawMultiSelection()
    {
        if (_selector.SelectedPaths.Count == 0)
            return;

        var sizeType = ImGui.GetFrameHeight();
        var availableSizePercent = (ImGui.GetContentRegionAvail().X - sizeType - 4 * ImGui.GetStyle().CellPadding.X) / 100;
        var sizeMods = availableSizePercent * 35;
        var sizeFolders = availableSizePercent * 65;

        ImGui.NewLine();
        ImGui.TextUnformatted("Currently Selected Profiles");
        ImGui.Separator();
        using var table = ImRaii.Table("profile", 3, ImGuiTableFlags.RowBg);
        ImGui.TableSetupColumn("btn", ImGuiTableColumnFlags.WidthFixed, sizeType);
        ImGui.TableSetupColumn("name", ImGuiTableColumnFlags.WidthFixed, sizeMods);
        ImGui.TableSetupColumn("path", ImGuiTableColumnFlags.WidthFixed, sizeFolders);

        var i = 0;
        foreach (var (fullName, path) in _selector.SelectedPaths.Select(p => (p.FullName(), p))
                     .OrderBy(p => p.Item1, StringComparer.OrdinalIgnoreCase))
        {
            using var id = ImRaii.PushId(i++);
            ImGui.TableNextColumn();
            var icon = (path is ProfileFileSystem.Leaf ? FontAwesomeIcon.FileCircleMinus : FontAwesomeIcon.FolderMinus).ToIconString();
            if (ImGuiUtil.DrawDisabledButton(icon, new Vector2(sizeType), "Remove from selection.", false, true))
                _selector.RemovePathFromMultiSelection(path);

            ImGui.TableNextColumn();
            ImGui.AlignTextToFramePadding();
            ImGui.TextUnformatted(path is ProfileFileSystem.Leaf l ? _selector.IncognitoMode ? l.Value.Incognito : l.Value.Name.Text : string.Empty);

            ImGui.TableNextColumn();
            ImGui.AlignTextToFramePadding();
            ImGui.TextUnformatted(_selector.IncognitoMode ? "Incognito is active" : fullName);
        }
    }

    private void DrawPanel()
    {
        using var child = ImRaii.Child("##Panel", -Vector2.One, true);
        if (!child || _selector.Selected == null)
            return;

        DrawEnabledSetting();
        using (var disabled = ImRaii.Disabled(_selector.Selected?.IsWriteProtected ?? true))
        {
            DrawBasicSettings();
            DrawTemplateArea();
        }
    }

    private void DrawEnabledSetting()
    {
        var spacing = ImGui.GetStyle().ItemInnerSpacing with { X = ImGui.GetStyle().ItemSpacing.X, Y = ImGui.GetStyle().ItemSpacing.Y };

        using (var style = ImRaii.PushStyle(ImGuiStyleVar.ItemSpacing, spacing))
        {
            var enabled = _selector.Selected?.Enabled ?? false;
            using (ImRaii.Disabled(_templateEditorManager.IsEditorActive || _templateEditorManager.IsEditorPaused))
            {
                if (ImGui.Checkbox("##Enabled", ref enabled))
                    _manager.SetEnabled(_selector.Selected!, enabled);
                ImGuiUtil.LabeledHelpMarker("Enabled",
                    "Whether the templates in this profile should be applied at all. Only one profile can be enabled for a character at the same time.");
            }

            ImGui.SameLine();
            var isDefault = _manager.DefaultProfile == _selector.Selected;
            var isDefaultOrCurrentProfilesEnabled = _manager.DefaultProfile?.Enabled ?? false || enabled;
            using (ImRaii.Disabled(isDefaultOrCurrentProfilesEnabled))
            {
                if (ImGui.Checkbox("##DefaultProfile", ref isDefault))
                    _manager.SetDefaultProfile(isDefault ? _selector.Selected! : null);
                ImGuiUtil.LabeledHelpMarker("Apply to all players and retainers",
                    "Whether the templates in this profile are applied to all players and retainers without a specific profile. This setting cannot be applied to multiple profiles.");
            }
            if(isDefaultOrCurrentProfilesEnabled)
            {
                ImGui.SameLine();
                ImGui.PushStyleColor(ImGuiCol.Text, Constants.Colors.Warning);
                ImGuiUtil.PrintIcon(FontAwesomeIcon.ExclamationTriangle);
                ImGui.PopStyleColor();
                ImGuiUtil.HoverTooltip("Can only be changed when both currently selected and profile where this checkbox is checked are disabled.");
            }
        }
    }

    private void DrawBasicSettings()
    {
        using (var style = ImRaii.PushStyle(ImGuiStyleVar.ButtonTextAlign, new Vector2(0, 0.5f)))
        {
            using (var table = ImRaii.Table("BasicSettings", 2))
            {
                ImGui.TableSetupColumn("BasicCol1", ImGuiTableColumnFlags.WidthFixed, ImGui.CalcTextSize("lorem ipsum dolor").X);
                ImGui.TableSetupColumn("BasicCol2", ImGuiTableColumnFlags.WidthStretch);

                ImGuiUtil.DrawFrameColumn("Profile Name");
                ImGui.TableNextColumn();
                var width = new Vector2(ImGui.GetContentRegionAvail().X, 0);
                var name = _newName ?? _selector.Selected!.Name;
                ImGui.SetNextItemWidth(width.X);

                if (!_selector.IncognitoMode)
                {
                    if (ImGui.InputText("##ProfileName", ref name, 128))
                    {
                        _newName = name;
                        _changedProfile = _selector.Selected;
                    }

                    if (ImGui.IsItemDeactivatedAfterEdit() && _changedProfile != null)
                    {
                        _manager.Rename(_changedProfile, name);
                        _newName = null;
                        _changedProfile = null;
                    }
                }
                else
                    ImGui.TextUnformatted(_selector.Selected!.Incognito);

                ImGui.TableNextRow();

                ImGuiUtil.DrawFrameColumn("Character Name");
                ImGui.TableNextColumn();
                width = new Vector2(ImGui.GetContentRegionAvail().X - ImGui.CalcTextSize("Limit to my creatures").X - 68, 0);
                name = _newCharacterName ?? _selector.Selected!.CharacterName;
                ImGui.SetNextItemWidth(width.X);

                if(_manager.DefaultProfile != _selector.Selected)
                {
                    if (!_selector.IncognitoMode)
                    {
                        if (ImGui.InputText("##CharacterName", ref name, 128))
                        {
                            _newCharacterName = name;
                            _changedProfile = _selector.Selected;
                        }

                        if (ImGui.IsItemDeactivatedAfterEdit() && _changedProfile != null)
                        {
                            _manager.ChangeCharacterName(_changedProfile, name);
                            _newCharacterName = null;
                            _changedProfile = null;
                        }
                    }
                    else
                        ImGui.TextUnformatted("Incognito active");

                    ImGui.SameLine();
                    var enabled = _selector.Selected?.LimitLookupToOwnedObjects ?? false;
                    if (ImGui.Checkbox("##LimitLookupToOwnedObjects", ref enabled))
                        _manager.SetLimitLookupToOwned(_selector.Selected!, enabled);
                    ImGuiUtil.LabeledHelpMarker("Limit to my creatures",
                        "When enabled limits the character search to only your own summons, mounts and minions.\nUseful when there is possibility there will be another character with that name owned by another player.\n* For battle chocobo use \"Chocobo\" as character name.");
                }
                else
                    ImGui.TextUnformatted("All players and retainers");
            }
        }
    }

    private void DrawTemplateArea()
    {
        using var table = ImRaii.Table("SetTable", 4, ImGuiTableFlags.RowBg | ImGuiTableFlags.ScrollX | ImGuiTableFlags.ScrollY);
        if (!table)
            return;

        ImGui.TableSetupColumn("##del", ImGuiTableColumnFlags.WidthFixed, ImGui.GetFrameHeight());
        ImGui.TableSetupColumn("##Index", ImGuiTableColumnFlags.WidthFixed, 30 * ImGuiHelpers.GlobalScale);

        ImGui.TableSetupColumn("Template", ImGuiTableColumnFlags.WidthFixed, 220 * ImGuiHelpers.GlobalScale);

        ImGui.TableSetupColumn("##editbtn", ImGuiTableColumnFlags.WidthFixed, 120 * ImGuiHelpers.GlobalScale);

        ImGui.TableHeadersRow();

        //warn: .ToList() might be performance critical at some point
        //the copying via ToList is done because manipulations with .Templates list result in "Collection was modified" exception here
        foreach (var (template, idx) in _selector.Selected!.Templates.WithIndex().ToList())
        {
            using var id = ImRaii.PushId(idx);
            ImGui.TableNextColumn();
            var keyValid = _configuration.UISettings.DeleteTemplateModifier.IsActive();
            var tt = keyValid
                ? "Remove this template from the profile."
                : $"Remove this template from the profile.\nHold {_configuration.UISettings.DeleteTemplateModifier} to remove.";

            if (ImGuiUtil.DrawDisabledButton(FontAwesomeIcon.Trash.ToIconString(), new Vector2(ImGui.GetFrameHeight()), tt, !keyValid, true))
                _endAction = () => _manager.DeleteTemplate(_selector.Selected!, idx);
            ImGui.TableNextColumn();
            ImGui.Selectable($"#{idx + 1:D2}");
            DrawDragDrop(_selector.Selected!, idx);
            ImGui.TableNextColumn();
            _templateCombo.Draw(_selector.Selected!, template, idx);
            DrawDragDrop(_selector.Selected!, idx);
            ImGui.TableNextColumn();

            var disabledCondition = _templateEditorManager.IsEditorActive || template.IsWriteProtected;

            if (ImGuiUtil.DrawDisabledButton(FontAwesomeIcon.Edit.ToIconString(), new Vector2(ImGui.GetFrameHeight()), "Open this template in the template editor", disabledCondition, true))
                _templateEditorEvent.Invoke(TemplateEditorEvent.Type.EditorEnableRequested, template);

            if (disabledCondition)
            {
                //todo: make helper
                ImGui.SameLine();
                ImGui.PushStyleColor(ImGuiCol.Text, Constants.Colors.Warning);
                ImGuiUtil.PrintIcon(FontAwesomeIcon.ExclamationTriangle);
                ImGui.PopStyleColor();
                ImGuiUtil.HoverTooltip("This template cannot be edited because it is either write protected or you are already editing one of the templates.");
            }
        }

        ImGui.TableNextColumn();
        ImGui.TableNextColumn();
        ImGui.AlignTextToFramePadding();
        ImGui.TextUnformatted("New");
        ImGui.TableNextColumn();
        _templateCombo.Draw(_selector.Selected!, null, -1);
        ImGui.TableNextRow();

        _endAction?.Invoke();
        _endAction = null;
    }

    private void DrawDragDrop(Profile profile, int index)
    {
        const string dragDropLabel = "TemplateDragDrop";
        using (var target = ImRaii.DragDropTarget())
        {
            if (target.Success && ImGuiUtil.IsDropping(dragDropLabel))
            {
                if (_dragIndex >= 0)
                {
                    var idx = _dragIndex;
                    _endAction = () => _manager.MoveTemplate(profile, idx, index);
                }

                _dragIndex = -1;
            }
        }

        using (var source = ImRaii.DragDropSource())
        {
            if (source)
            {
                ImGui.TextUnformatted($"Moving template #{index + 1:D2}...");
                if (ImGui.SetDragDropPayload(dragDropLabel, nint.Zero, 0))
                {
                    _dragIndex = index;
                }
            }
        }
    }
}