using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Numerics;
using Content.Client.Administration.UI.CustomControls;
using Content.Shared.Administration;
using Content.Shared.CCVar;
using Content.Shared.Database;
using Content.Shared.Roles;
using Robust.Client.AutoGenerated;
using Robust.Client.GameObjects;
using Robust.Client.Graphics;
using Robust.Client.UserInterface;
using Robust.Client.UserInterface.Controls;
using Robust.Client.UserInterface.CustomControls;
using Robust.Client.UserInterface.XAML;
using Robust.Shared.Configuration;
using Robust.Shared.Prototypes;
using Robust.Shared.Timing;
using Robust.Shared.Utility;

namespace Content.Client.Administration.UI.BanPanel;

[GenerateTypedNameReferences]
public sealed partial class BanPanel : DefaultWindow
{
    public event Action<string?, (IPAddress, int)?, bool, ImmutableTypedHwid?, bool, uint, string, NoteSeverity, string[]?, bool>? BanSubmitted;
    public event Action<string>? PlayerChanged;
    private string? PlayerUsername { get; set; }
    private (IPAddress, int)? IpAddress { get; set; }
    private ImmutableTypedHwid? Hwid { get; set; }
    private double TimeEntered { get; set; }
    private uint Multiplier { get; set; }
    private bool HasBanFlag { get; set; }
    private TimeSpan? ButtonResetOn { get; set; }

    // This is less efficient than just holding a reference to the root control and enumerating children, but you
    // have to know how the controls are nested, which makes the code more complicated.
    // Role group name -> the role buttons themselves.
    private readonly Dictionary<string, List<Button>> _roleCheckboxes = new();
    private readonly ISawmill _banpanelSawmill;

    [Dependency] private readonly IGameTiming _gameTiming = default!;
    [Dependency] private readonly IConfigurationManager _cfg = default!;
    [Dependency] private readonly ILogManager _logManager = default!;
    [Dependency] private readonly IEntityManager _entMan = default!;
    [Dependency] private readonly IPrototypeManager _protoMan = default!;

    private const string ExpandedArrow = "▼";
    private const string ContractedArrow = "▶";

    private enum TabNumbers
    {
        BasicInfo,
        //Text,
        Players,
        Roles
    }

    private enum Multipliers
    {
        Minutes,
        Hours,
        Days,
        Weeks,
        Months,
        Years,
        Permanent
    }

    private enum Types
    {
        None,
        Server,
        Role
    }

    public BanPanel()
    {
        RobustXamlLoader.Load(this);
        IoCManager.InjectDependencies(this);
        _banpanelSawmill = _logManager.GetSawmill("admin.banpanel");
        PlayerList.OnSelectionChanged += OnPlayerSelectionChanged;
        PlayerNameLine.OnFocusExit += _ => OnPlayerNameChanged();
        PlayerCheckbox.OnPressed += _ =>
        {
            PlayerNameLine.Editable = PlayerCheckbox.Pressed;
            PlayerNameLine.ModulateSelfOverride = null;
        };
        TimeLine.OnTextChanged += OnMinutesChanged;
        MultiplierOption.OnItemSelected += args =>
        {
            MultiplierOption.SelectId(args.Id);
            OnMultiplierChanged();
        };
        IpLine.OnFocusExit += _ => OnIpChanged();
        IpCheckbox.OnPressed += _ =>
        {
            IpLine.Editable = IpCheckbox.Pressed;
            OnIpChanged();
        };
        HwidLine.OnFocusExit += _ => OnHwidChanged();
        HwidCheckbox.OnPressed += _ =>
        {
            HwidLine.Editable = HwidCheckbox.Pressed;
            OnHwidChanged();
        };
        TypeOption.OnItemSelected += args =>
        {
            TypeOption.SelectId(args.Id);
            OnTypeChanged();
        };
        LastConnCheckbox.OnPressed += args =>
        {
            IpLine.ModulateSelfOverride = null;
            HwidLine.ModulateSelfOverride = null;
            OnIpChanged();
            OnHwidChanged();
        };
        SubmitButton.OnPressed += SubmitButtonOnOnPressed;

        IpCheckbox.Pressed = _cfg.GetCVar(CCVars.ServerBanIpBanDefault);
        HwidCheckbox.Pressed = _cfg.GetCVar(CCVars.ServerBanHwidBanDefault);
        LastConnCheckbox.Pressed = _cfg.GetCVar(CCVars.ServerBanUseLastDetails);
        EraseCheckbox.Pressed = _cfg.GetCVar(CCVars.ServerBanErasePlayer);

        SeverityOption.AddItem(Loc.GetString("admin-note-editor-severity-none"), (int) NoteSeverity.None);
        SeverityOption.AddItem(Loc.GetString("admin-note-editor-severity-low"), (int) NoteSeverity.Minor);
        SeverityOption.AddItem(Loc.GetString("admin-note-editor-severity-medium"), (int) NoteSeverity.Medium);
        SeverityOption.AddItem(Loc.GetString("admin-note-editor-severity-high"), (int) NoteSeverity.High);
        SeverityOption.SelectId((int) NoteSeverity.Medium);
        SeverityOption.OnItemSelected += args => SeverityOption.SelectId(args.Id);

        MultiplierOption.AddItem(Loc.GetString("ban-panel-minutes"), (int) Multipliers.Minutes);
        MultiplierOption.AddItem(Loc.GetString("ban-panel-hours"), (int) Multipliers.Hours);
        MultiplierOption.AddItem(Loc.GetString("ban-panel-days"), (int) Multipliers.Days);
        MultiplierOption.AddItem(Loc.GetString("ban-panel-weeks"), (int) Multipliers.Weeks);
        MultiplierOption.AddItem(Loc.GetString("ban-panel-months"), (int) Multipliers.Months);
        MultiplierOption.AddItem(Loc.GetString("ban-panel-years"), (int) Multipliers.Years);
        MultiplierOption.AddItem(Loc.GetString("ban-panel-permanent"), (int) Multipliers.Permanent);
        MultiplierOption.SelectId((int) Multipliers.Minutes);
        OnMultiplierChanged();

        Tabs.SetTabTitle((int) TabNumbers.BasicInfo, Loc.GetString("ban-panel-tabs-basic"));
        //Tabs.SetTabTitle((int) TabNumbers.Text, Loc.GetString("ban-panel-tabs-reason"));
        Tabs.SetTabTitle((int) TabNumbers.Players, Loc.GetString("ban-panel-tabs-players"));
        Tabs.SetTabTitle((int) TabNumbers.Roles, Loc.GetString("ban-panel-tabs-role"));
        Tabs.SetTabVisible((int) TabNumbers.Roles, false);

        TypeOption.AddItem(Loc.GetString("ban-panel-select"), (int) Types.None);
        TypeOption.AddItem(Loc.GetString("ban-panel-server"), (int) Types.Server);
        TypeOption.AddItem(Loc.GetString("ban-panel-role"), (int) Types.Role);

        ReasonTextEdit.Placeholder = new Rope.Leaf(Loc.GetString("ban-panel-reason"));

        var departmentJobs = _protoMan.EnumeratePrototypes<DepartmentPrototype>()
                                      .OrderBy(x => x.Weight);
        foreach (var proto in departmentJobs)
        {
            var roles = proto.Roles.Select(x => _protoMan.Index(x))
                             .OrderBy(x => x.ID);
            CreateRoleGroup(proto.ID, proto.Color, roles);
        }

        var antagRoles = _protoMan.EnumeratePrototypes<AntagPrototype>()
                                  .OrderBy(x => x.ID);
        CreateRoleGroup("Antagonist", Color.Red, antagRoles);
    }

    /// <summary>
    /// Creates a "Role group" which stores information and logic for one "group" of roll bans.
    /// For example, all antags are one group, logi is a group, medical is a group, etc...
    /// </summary>
    private void CreateRoleGroup<T>(string groupName, Color color, IEnumerable<T> roles) where T : class, IPrototype
    {
        var outerContainer = new BoxContainer
        {
            Name = $"{groupName}GroupOuterBox",
            HorizontalExpand = true,
            VerticalExpand = true,
            Orientation = BoxContainer.LayoutOrientation.Vertical,
            Margin = new Thickness(4),
        };

        // Stores stuff like ban all and expand buttons.
        var roleGroupHeader = new BoxContainer
        {
            Orientation = BoxContainer.LayoutOrientation.Horizontal,
        };

        // Stores the role checkboxes themselves.
        var innerContainer = new GridContainer
        {
            Name = $"{groupName}GroupInnerBox",
            HorizontalExpand = true,
            Columns = 2,
            Visible = false,
            Margin = new Thickness(15, 5, 0, 5),
        };

        var roleGroupCheckbox = CreateRoleGroupHeader(groupName, roleGroupHeader, color, innerContainer);

        outerContainer.AddChild(roleGroupHeader);

        // Add the roles themselves
        foreach (var role in roles)
        {
            AddRoleCheckbox(groupName, role.ID, innerContainer, roleGroupCheckbox);
        }

        outerContainer.AddChild(innerContainer);

        RolesContainer.AddChild(new PanelContainer
        {
            PanelOverride = new StyleBoxFlat
            {
                BackgroundColor = color
            }
        });
        RolesContainer.AddChild(outerContainer);
        RolesContainer.AddChild(new HSeparator());
    }

    private Button CreateRoleGroupHeader(string groupName, BoxContainer header, Color color, GridContainer innerContainer)
    {
        var roleGroupCheckbox = new Button
        {
            Name = $"{groupName}GroupCheckbox",
            Text = "Ban all",
            Margin = new Thickness(0, 0, 5, 0),
            ToggleMode = true,
        };

        // When this is toggled, toggle all buttons in this group so they match.
        roleGroupCheckbox.OnToggled += args =>
        {
            foreach (var role in _roleCheckboxes[groupName])
            {
                role.Pressed = args.Pressed;
            }

            if (args.Pressed)
            {
                if (!Enum.TryParse(_cfg.GetCVar(CCVars.DepartmentBanDefaultSeverity), true, out NoteSeverity newSeverity))
                {
                    _banpanelSawmill
                        .Warning("Departmental role ban severity could not be parsed from config!");
                    return;
                }
                SeverityOption.SelectId((int) newSeverity);
            }
            else
            {
                foreach (var roleButtons in _roleCheckboxes.Values)
                {
                    foreach (var button in roleButtons)
                    {
                        if (button.Pressed)
                            return;
                    }
                }

                if (!Enum.TryParse(_cfg.GetCVar(CCVars.RoleBanDefaultSeverity), true, out NoteSeverity newSeverity))
                {
                    _banpanelSawmill
                        .Warning("Role ban severity could not be parsed from config!");
                    return;
                }
                SeverityOption.SelectId((int) newSeverity);
            }
        };

        var hideButton = new Button
        {
            Text = Loc.GetString("role-bans-expand-roles") + " " + ContractedArrow,
            ToggleMode = true,
        };
        hideButton.OnPressed += args =>
        {
            innerContainer.Visible = args.Button.Pressed;
            ((Button)args.Button).Text = args.Button.Pressed
                ? Loc.GetString("role-bans-contract-roles") + " " + ExpandedArrow
                : Loc.GetString("role-bans-expand-roles") + " " + ContractedArrow;
        };
        header.AddChild(new Label
        {
            Text = groupName,
            Modulate = color,
            Margin = new Thickness(0, 0, 5, 0),
        });
        header.AddChild(roleGroupCheckbox);
        header.AddChild(hideButton);
        return roleGroupCheckbox;
    }

    /// <summary>
    /// Adds a checkbutton specifically for one "role" in a "group"
    /// E.g. it would add the Chief Medical Officer "role" into the "Medical" group.
    /// </summary>
    private void AddRoleCheckbox(string group, string role, GridContainer roleGroupInnerContainer, Button roleGroupCheckbox)
    {
        var roleCheckboxContainer = new BoxContainer();
        var roleCheckButton = new Button
        {
            Name = $"{role}RoleCheckbox",
            Text = role,
            ToggleMode = true,
        };
        roleCheckButton.OnToggled += args =>
        {
            // Checks the role group checkbox if all the children are pressed
            if (args.Pressed && _roleCheckboxes[group].All(e => e.Pressed))
                roleGroupCheckbox.Pressed = args.Pressed;
            else
                roleGroupCheckbox.Pressed = false;
        };

        // This is adding the icon before the role name
        // Yeah, this is sus, but having to split the functions up and stuff is worse imo.
        if (_protoMan.TryIndex<JobPrototype>(role, out var jobPrototype) && _protoMan.TryIndex(jobPrototype.Icon, out var iconProto))
        {
            var jobIconTexture = new TextureRect
            {
                Texture = _entMan.System<SpriteSystem>().Frame0(iconProto.Icon),
                TextureScale = new Vector2(2.5f, 2.5f),
                Stretch = TextureRect.StretchMode.KeepCentered,
                Margin = new Thickness(5, 0, 0, 0),
            };
            roleCheckboxContainer.AddChild(jobIconTexture);
        }

        roleCheckboxContainer.AddChild(roleCheckButton);

        roleGroupInnerContainer.AddChild(roleCheckboxContainer);

        _roleCheckboxes.TryAdd(group, []);
        _roleCheckboxes[group].Add(roleCheckButton);
    }

    public void UpdateBanFlag(bool newFlag)
    {
        HasBanFlag = newFlag;
        SubmitButton.Visible = HasBanFlag;
        ModulateSelfOverride = HasBanFlag ? Color.Red : null;
    }

    public void UpdatePlayerData(string playerName)
    {
        if (string.IsNullOrEmpty(playerName))
        {
            PlayerNameLine.ModulateSelfOverride = Color.Red;
            ErrorLevel |= ErrorLevelEnum.PlayerName;
            UpdateSubmitEnabled();
            return;
        }
        PlayerNameLine.ModulateSelfOverride = null;
        ErrorLevel &= ~ErrorLevelEnum.PlayerName;
        UpdateSubmitEnabled();
        PlayerUsername = playerName;
        PlayerNameLine.Text = playerName;
    }

    [Flags]
    private enum ErrorLevelEnum : byte
    {
        None = 0,
        Minutes = 1 << 0,
        PlayerName = 1 << 1,
        IpAddress = 1 << 2,
        Hwid = 1 << 3,
    }

    private ErrorLevelEnum ErrorLevel { get; set; }

    private void OnMinutesChanged(LineEdit.LineEditEventArgs args)
    {
        TimeLine.Text = args.Text;
        if (!double.TryParse(args.Text, out var result))
        {
            ExpiresLabel.Text = "err";
            ErrorLevel |= ErrorLevelEnum.Minutes;
            TimeLine.ModulateSelfOverride = Color.Red;
            UpdateSubmitEnabled();
            return;
        }

        ErrorLevel &= ~ErrorLevelEnum.Minutes;
        TimeLine.ModulateSelfOverride = null;
        TimeEntered = result;
        UpdateSubmitEnabled();
        UpdateExpiresLabel();
    }

    private void OnMultiplierChanged()
    {
        TimeLine.Editable = MultiplierOption.SelectedId != (int) Multipliers.Permanent;
        Multiplier = MultiplierOption.SelectedId switch
        {
            (int) Multipliers.Minutes => 1,
            (int) Multipliers.Hours => 60,
            (int) Multipliers.Days => 60 * 24,
            (int) Multipliers.Weeks => 60 * 24 * 7,
            (int) Multipliers.Months => 60 * 24 * 30,
            (int) Multipliers.Years => 60 * 24 * 365,
            (int) Multipliers.Permanent => 0,
            _ => throw new ArgumentOutOfRangeException(nameof(MultiplierOption.SelectedId), "Multiplier out of range")
        };
        UpdateExpiresLabel();
    }

    private void UpdateExpiresLabel()
    {
        var minutes = (uint) (TimeEntered * Multiplier);
        ExpiresLabel.Text = minutes == 0
            ? $"{Loc.GetString("admin-note-editor-expiry-label")} {Loc.GetString("server-ban-string-never")}"
            : $"{Loc.GetString("admin-note-editor-expiry-label")} {DateTime.Now + TimeSpan.FromMinutes(minutes):yyyy/MM/dd HH:mm:ss}";
    }

    private void OnIpChanged()
    {
        if (LastConnCheckbox.Pressed && IpAddress is null || !IpCheckbox.Pressed)
        {
            IpAddress = null;
            ErrorLevel &= ~ErrorLevelEnum.IpAddress;
            IpLine.ModulateSelfOverride = null;
            UpdateSubmitEnabled();
            return;
        }
        var ip = IpLine.Text;
        var hid = "0";
        if (ip.Contains('/'))
        {
            var split = ip.Split('/');
            ip = split[0];
            hid = split[1];
        }

        if (!IPAddress.TryParse(ip, out var parsedIp) || !byte.TryParse(hid, out var hidInt) || hidInt > 128 || hidInt > 32 && parsedIp.AddressFamily == AddressFamily.InterNetwork)
        {
            ErrorLevel |= ErrorLevelEnum.IpAddress;
            IpLine.ModulateSelfOverride = Color.Red;
            UpdateSubmitEnabled();
            return;
        }

        if (hidInt == 0)
            hidInt = (byte) (parsedIp.AddressFamily == AddressFamily.InterNetworkV6 ? 128 : 32);
        IpAddress = (parsedIp, hidInt);
        ErrorLevel &= ~ErrorLevelEnum.IpAddress;
        IpLine.ModulateSelfOverride = null;
        UpdateSubmitEnabled();
    }

    private void OnHwidChanged()
    {
        var hwidString = HwidLine.Text;
        ImmutableTypedHwid? hwid = null;
        if (HwidCheckbox.Pressed && !(string.IsNullOrEmpty(hwidString) && LastConnCheckbox.Pressed) && !ImmutableTypedHwid.TryParse(hwidString, out hwid))
        {
            ErrorLevel |= ErrorLevelEnum.Hwid;
            HwidLine.ModulateSelfOverride = Color.Red;
            UpdateSubmitEnabled();
            return;
        }

        ErrorLevel &= ~ErrorLevelEnum.Hwid;
        HwidLine.ModulateSelfOverride = null;
        UpdateSubmitEnabled();

        if (LastConnCheckbox.Pressed || !HwidCheckbox.Pressed)
        {
            Hwid = null;
            return;
        }
        Hwid = hwid;
    }

    private void OnTypeChanged()
    {
        TypeOption.ModulateSelfOverride = null;
        Tabs.SetTabVisible((int) TabNumbers.Roles, TypeOption.SelectedId == (int) Types.Role);
            NoteSeverity? newSeverity = null;
            switch (TypeOption.SelectedId)
            {
                case (int)Types.Server:
                if (Enum.TryParse(_cfg.GetCVar(CCVars.ServerBanDefaultSeverity), true, out NoteSeverity serverSeverity))
                    newSeverity = serverSeverity;
                else
                {
                    _banpanelSawmill
                        .Warning("Server ban severity could not be parsed from config!");
                }

                break;
                case (int) Types.Role:

                    if (Enum.TryParse(_cfg.GetCVar(CCVars.RoleBanDefaultSeverity), true, out NoteSeverity roleSeverity))
                    {
                        newSeverity = roleSeverity;
                    }
                    else
                    {
                        _banpanelSawmill
                            .Warning("Role ban severity could not be parsed from config!");
                    }
                    break;
            }

            if (newSeverity != null)
                SeverityOption.SelectId((int) newSeverity.Value);
    }

    private void UpdateSubmitEnabled()
    {
        SubmitButton.Disabled = ErrorLevel != ErrorLevelEnum.None;
    }

    private void OnPlayerNameChanged()
    {
        if (PlayerUsername == PlayerNameLine.Text)
            return;
        PlayerUsername = PlayerNameLine.Text;
        if (!PlayerCheckbox.Pressed)
            return;
        if (string.IsNullOrWhiteSpace(PlayerUsername))
            ErrorLevel |= ErrorLevelEnum.PlayerName;
        else
            ErrorLevel &= ~ErrorLevelEnum.PlayerName;

        UpdateSubmitEnabled();
        PlayerChanged?.Invoke(PlayerUsername);
    }

    public void OnPlayerSelectionChanged(PlayerInfo? player)
    {
        PlayerNameLine.Text = player?.Username ?? string.Empty;
        OnPlayerNameChanged();
    }

    private void ResetTextEditor(GUIBoundKeyEventArgs _)
    {
        ReasonTextEdit.ModulateSelfOverride = null;
        ReasonTextEdit.OnKeyBindDown -= ResetTextEditor;
    }

    private void SubmitButtonOnOnPressed(BaseButton.ButtonEventArgs obj)
    {
        string[]? roles = null;
        if (TypeOption.SelectedId == (int) Types.Role)
        {
            var rolesList = new List<string>();
            if (_roleCheckboxes.Count == 0)
                throw new DebugAssertException("RoleCheckboxes was empty");

            foreach (var button in _roleCheckboxes.Values.SelectMany(departmentButtons => departmentButtons))
            {
                if (button is { Pressed: true, Text: not null })
                {
                    rolesList.Add(button.Text);
                }
            }

            if (rolesList.Count == 0)
            {
                Tabs.CurrentTab = (int) TabNumbers.Roles;
                return;
            }

            roles = rolesList.ToArray();
        }

        if (TypeOption.SelectedId == (int) Types.None)
        {
            TypeOption.ModulateSelfOverride = Color.Red;
            Tabs.CurrentTab = (int) TabNumbers.BasicInfo;
            return;
        }

        var reason = Rope.Collapse(ReasonTextEdit.TextRope);
        if (string.IsNullOrWhiteSpace(reason))
        {
            //Tabs.CurrentTab = (int) TabNumbers.Text;
            Tabs.CurrentTab = (int) TabNumbers.BasicInfo;
            ReasonTextEdit.GrabKeyboardFocus();
            ReasonTextEdit.ModulateSelfOverride = Color.Red;
            ReasonTextEdit.OnKeyBindDown += ResetTextEditor;
            return;
        }

        if (ButtonResetOn is null)
        {
            ButtonResetOn = _gameTiming.CurTime.Add(TimeSpan.FromSeconds(3));
            SubmitButton.ModulateSelfOverride = Color.Red;
            SubmitButton.Text = Loc.GetString("ban-panel-confirm");
            return;
        }

        var player = PlayerCheckbox.Pressed ? PlayerUsername : null;
        var useLastIp = IpCheckbox.Pressed && LastConnCheckbox.Pressed && IpAddress is null;
        var useLastHwid = HwidCheckbox.Pressed && LastConnCheckbox.Pressed && Hwid is null;
        var severity = (NoteSeverity) SeverityOption.SelectedId;
        var erase = EraseCheckbox.Pressed;
        BanSubmitted?.Invoke(player, IpAddress, useLastIp, Hwid, useLastHwid, (uint) (TimeEntered * Multiplier), reason, severity, roles, erase);
    }

    protected override void FrameUpdate(FrameEventArgs args)
    {
        base.FrameUpdate(args);

        // This checks for null for free, do not invert it as null always produces a false value
        if (_gameTiming.CurTime > ButtonResetOn)
        {
            ButtonResetOn = null;
            SubmitButton.ModulateSelfOverride = null;
            SubmitButton.Text = Loc.GetString("ban-panel-submit");
        }
    }
}