using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using Dalamud.Bindings.ImGui;
using Dalamud.Game;
using Dalamud.Interface.Textures;
using Dalamud.Interface.Utility.Raii;
using Dalamud.Interface.Windowing;
using Lumina.Excel.Sheets;
using Action = Lumina.Excel.Sheets.Action;

namespace ConfigurableCombo;

public class ConfigWindow : Window
{
    private const float ActionIconSize = 24f;

    private uint _selectedJobId;
    private JobListKind _jobListKind = JobListKind.Combat;
    private string _newComboName = "New Combo";
    private UserComboDefinition? _editingCombo;
    private int _editingActionIndex = -1;
    private string _editingActionIdInput = "";
    private UserComboDefinition? _addFromJobTargetCombo;
    private string _jobActionFilter = "";
    private bool _windowWasOpen;

    public ConfigWindow() : base("ConfigurableCombo")
    {
        Size = new Vector2(500, 450);
        SizeCondition = ImGuiCond.FirstUseEver;
    }

    /// <summary>Set job dropdown to player's current job if it's in the current job-type list; otherwise keep selection if valid or Unspecified.</summary>
    private void SyncJobDropdownToPlayerOrSelection()
    {
        var list = JobActionsHelper.GetJobList(_jobListKind);
        var playerJobId = Service.ClientState.LocalPlayer?.ClassJob.RowId ?? 0u;
        if (playerJobId != 0 && list.Any(x => x.JobId == playerJobId))
            _selectedJobId = playerJobId;
        else if (list.All(x => x.JobId != _selectedJobId))
            _selectedJobId = 0;
    }

    public override void Draw()
    {
        if (!Service.Configuration.EnablePlugin)
        {
            ImGui.TextColored(new Vector4(1, 0.4f, 0.4f, 1), "Plugin is disabled. Enable below to use combo replacement.");
        }

        bool enablePlugin = Service.Configuration.EnablePlugin;
        if (ImGui.Checkbox("Enable plugin", ref enablePlugin))
        {
            Service.Configuration.EnablePlugin = enablePlugin;
            Service.Configuration.Save();
        }
        ImGui.SameLine();
        ImGui.TextColored(new Vector4(0.6f, 0.7f, 0.8f, 1f), "Tip: Use /ccombo to open this window anytime.");

        ImGui.Spacing();
        ImGui.Separator();
        ImGui.Spacing();

        // When window just opened, select the player's current job so their combos are shown by default
        if (IsOpen && !_windowWasOpen)
        {
            _windowWasOpen = true;
            var player = Service.ClientState.LocalPlayer;
            var currentJobId = player?.ClassJob.RowId ?? 0u;
            if (currentJobId != 0)
            {
                var combatList = JobActionsHelper.GetJobList(JobListKind.Combat);
                var craftList = JobActionsHelper.GetJobList(JobListKind.CraftingGathering);
                if (combatList.Any(x => x.JobId == currentJobId))
                {
                    _jobListKind = JobListKind.Combat;
                    _selectedJobId = currentJobId;
                }
                else if (craftList.Any(x => x.JobId == currentJobId))
                {
                    _jobListKind = JobListKind.CraftingGathering;
                    _selectedJobId = currentJobId;
                }
            }
        }
        else if (!IsOpen)
        {
            _windowWasOpen = false;
        }

        // Job type toggle: Combat vs Crafting & Gathering
        ImGui.Text("Job type:");
        ImGui.SameLine();
        bool showCombatJobs = _jobListKind == JobListKind.Combat;
        if (ImGui.Checkbox("Combat (DoW/DoM)", ref showCombatJobs))
        {
            _jobListKind = showCombatJobs ? JobListKind.Combat : JobListKind.CraftingGathering;
            SyncJobDropdownToPlayerOrSelection();
        }
        ImGui.SameLine();
        bool showCraftGather = _jobListKind == JobListKind.CraftingGathering;
        if (ImGui.Checkbox("Crafting & Gathering (DoH/DoL)", ref showCraftGather))
        {
            _jobListKind = showCraftGather ? JobListKind.CraftingGathering : JobListKind.Combat;
            SyncJobDropdownToPlayerOrSelection();
        }
        if (ImGui.IsItemHovered())
            ImGui.SetTooltip("Switch between battle jobs and crafters/gatherers. Combos are per job.");

        ImGui.Text("Job:");
        ImGui.SameLine();
        var jobList = JobActionsHelper.GetJobList(_jobListKind);
        var currentJobIndex = jobList.FindIndex(x => x.JobId == _selectedJobId);
        if (currentJobIndex < 0) currentJobIndex = 0;
        ImGui.SetNextItemWidth(180);
        if (ImGui.BeginCombo("##job", jobList[currentJobIndex].Name))
        {
            for (int j = 0; j < jobList.Count; j++)
            {
                var (jobId, name) = jobList[j];
                if (ImGui.Selectable(name, _selectedJobId == jobId))
                {
                    _selectedJobId = jobId;
                }
            }
            ImGui.EndCombo();
        }
        if (ImGui.IsItemHovered())
            ImGui.SetTooltip("Combos below are for this job. New combos will be saved to this job.");

        ImGui.Spacing();
        ImGui.Text("Define action sequences. Put the first action on your hotbar; each press advances the sequence.");
        ImGui.TextColored(new Vector4(0.7f, 0.8f, 1f, 1f),
            "Sequence resets to step 1 after the last step or after any other action.");
        ImGui.Spacing();
        ImGui.TextWrapped("Example (NIN 1-2 with 3a/3b on separate keys): Add a combo with actions 2240, 2242 (Spinning Edge, Gust Slash). Put 2240 on one hotbar slot. Use that slot for 1->2; put Aeolian Edge (2255) and Armor Crush (3563) on other keybinds.");
        ImGui.Spacing();

        // Add new combo (for selected job)
        ImGui.SetNextItemWidth(180);
        ImGui.InputTextWithHint("##name", "Combo name", ref _newComboName, 64);
        ImGui.SameLine();
        if (ImGui.Button("Add combo"))
        {
            Service.Configuration.UserCombos.Add(new UserComboDefinition { Name = _newComboName, JobId = _selectedJobId });
            Service.Configuration.Save();
            _newComboName = "New Combo";
        }

        ImGui.Spacing();
        ImGui.Separator();
        ImGui.Spacing();

        // List combos for selected job only
        for (int i = 0; i < Service.Configuration.UserCombos.Count; i++)
        {
            var combo = Service.Configuration.UserCombos[i];
            if (combo.JobId != _selectedJobId) continue;
            DrawCombo(combo, i);
        }
    }

    private void DrawCombo(UserComboDefinition combo, int index)
    {
        using (var id = ImRaii.PushId(index))
        {
            bool enabled = combo.Enabled;
            if (ImGui.Checkbox("##enabled", ref enabled))
            {
                combo.Enabled = enabled;
                Service.Configuration.Save();
            }
            ImGui.SameLine();

            bool open = ImGui.TreeNodeEx($"{combo.Name} ({combo.ActionIds.Count} actions)", ImGuiTreeNodeFlags.DefaultOpen);
            ImGui.SameLine(ImGui.GetContentRegionAvail().X - 80);
            if (ImGui.SmallButton("Delete"))
            {
                Service.Configuration.UserCombos.RemoveAt(index);
                Service.Configuration.Save();
                return;
            }

            if (open)
            {
                ImGui.Indent();

                // Name
                string name = combo.Name;
                if (ImGui.InputText("Name", ref name, 64))
                {
                    combo.Name = name;
                    Service.Configuration.Save();
                }

                // Action list
                ImGui.Text("Action sequence (first = hotbar slot; order: 1, 2, 3a/3b on other keys...)");
                ImGui.TextColored(new Vector4(0.9f, 0.85f, 0.4f, 1f), "First action must be the combo starter (e.g. Spinning Edge for NIN), or the icon/state won't advance.");
                for (int a = 0; a < combo.ActionIds.Count; a++)
                {
                    uint aid = combo.ActionIds[a];
                    string label = GetActionName(aid);
                    if (ImGui.SmallButton($"{label} (##{a})"))
                    {
                        _editingCombo = combo;
                        _editingActionIndex = a;
                        _editingActionIdInput = aid.ToString();
                    }
                    ImGui.SameLine();
                    if (ImGui.SmallButton($"X##del{a}"))
                    {
                        combo.ActionIds.RemoveAt(a);
                        Service.Configuration.Save();
                        break;
                    }
                }

                if (_editingCombo == combo && _editingActionIndex >= 0)
                {
                    ImGui.SetNextItemWidth(120);
                    if (ImGui.InputText("Action ID", ref _editingActionIdInput, 16, ImGuiInputTextFlags.CharsDecimal))
                    { }
                    ImGui.SameLine();
                    if (ImGui.Button("OK"))
                    {
                        if (uint.TryParse(_editingActionIdInput, out uint newId))
                        {
                            if (_editingActionIndex < combo.ActionIds.Count)
                                combo.ActionIds[_editingActionIndex] = newId;
                            else
                                combo.ActionIds.Add(newId);
                            Service.Configuration.Save();
                        }
                        _editingCombo = null;
                        _editingActionIndex = -1;
                    }
                    ImGui.SameLine();
                    if (ImGui.Button("Cancel"))
                    {
                        _editingCombo = null;
                        _editingActionIndex = -1;
                    }
                }

                ImGui.Spacing();
                ImGui.Text("Add action:");
                ImGui.SameLine();
                if (ImGui.Button("Action browser..."))
                {
                    _addFromJobTargetCombo = combo;
                }
                if (ImGui.IsItemHovered())
                    ImGui.SetTooltip("Browse Job-Related, PvP, or Pet/Other actions. Click an action to add to sequence.");
                ImGui.SameLine();
                if (ImGui.Button("Add by ID"))
                {
                    _editingCombo = combo;
                    _editingActionIndex = combo.ActionIds.Count;
                    _editingActionIdInput = "";
                }

                if (_addFromJobTargetCombo == combo)
                {
                    DrawActionBrowser(combo);
                }

                ImGui.Unindent();
                ImGui.TreePop();
            }
        }
    }

    private void DrawActionBrowser(UserComboDefinition targetCombo)
    {
        ImGui.Spacing();
        using (ImRaii.PushStyle(ImGuiStyleVar.ChildRounding, 5f))
        using (ImRaii.Child("ActionBrowser", new Vector2(-1, 340), true))
        {
            ImGui.TextColored(new Vector4(0.7f, 0.9f, 1f, 1f), "Action browser — select a category, then click an action to add.");
            ImGui.SameLine();
            if (ImGui.SmallButton("Close"))
            {
                _addFromJobTargetCombo = null;
                return;
            }
            ImGui.SetNextItemWidth(220f);
            ImGui.InputTextWithHint("##filter", "Filter by name or ID...", ref _jobActionFilter, 64);
            ImGui.Spacing();

            var filter = _jobActionFilter.AsSpan().Trim().ToString();
            bool hasFilter = !string.IsNullOrEmpty(filter);

            if (ImGui.BeginTabBar("ActionBrowserTabs"))
            {
                if (ImGui.BeginTabItem("Job-Related"))
                {
                    var actions = JobActionsHelper.GetActionsForJob(_selectedJobId);
                    DrawActionTable(actions, targetCombo, filter, hasFilter);
                    ImGui.EndTabItem();
                }
                if (ImGui.BeginTabItem("PvP Actions"))
                {
                    var actions = JobActionsHelper.GetPvPActions(_selectedJobId);
                    DrawActionTable(actions, targetCombo, filter, hasFilter);
                    ImGui.EndTabItem();
                }
                if (ImGui.BeginTabItem("Role Actions"))
                {
                    var actions = JobActionsHelper.GetRoleActions(_selectedJobId);
                    DrawActionTable(actions, targetCombo, filter, hasFilter);
                    ImGui.EndTabItem();
                }
                if (ImGui.BeginTabItem("Consumable Items"))
                {
                    var actions = JobActionsHelper.GetConsumableActions();
                    DrawActionTable(actions, targetCombo, filter, hasFilter);
                    ImGui.EndTabItem();
                }
                ImGui.EndTabBar();
            }
        }
    }

    private void DrawActionTable(
        List<(uint ActionId, string Name, uint IconId)> actions,
        UserComboDefinition targetCombo,
        string filter,
        bool hasFilter)
    {
        if (actions.Count == 0)
        {
            ImGui.TextDisabled("No actions in this category.");
            return;
        }
        if (ImGui.BeginTable("ActionBrowserTable", 3, ImGuiTableFlags.BordersInnerV | ImGuiTableFlags.ScrollY | ImGuiTableFlags.SizingStretchProp, new Vector2(-1, -1)))
        {
            ImGui.TableSetupColumn("Icon", ImGuiTableColumnFlags.WidthFixed, ActionIconSize + 8);
            ImGui.TableSetupColumn("Name", ImGuiTableColumnFlags.WidthStretch);
            ImGui.TableSetupColumn("ID", ImGuiTableColumnFlags.WidthFixed, 48);
            ImGui.TableHeadersRow();

            foreach (var (actionId, name, iconId) in actions)
            {
                if (hasFilter)
                {
                    if (name.IndexOf(filter, StringComparison.OrdinalIgnoreCase) < 0 &&
                        actionId.ToString().IndexOf(filter, StringComparison.OrdinalIgnoreCase) < 0)
                        continue;
                }

                ImGui.TableNextRow();
                ImGui.TableNextColumn();
                if (iconId > 0)
                {
                    try
                    {
                        var tex = Service.TextureProvider.GetFromGameIcon(new GameIconLookup(iconId));
                        var wrap = tex.GetWrapOrEmpty();
                        if (wrap != null)
                            ImGui.Image(wrap.Handle, new Vector2(ActionIconSize, ActionIconSize));
                    }
                    catch { }
                }
                ImGui.TableNextColumn();
                if (ImGui.Selectable($"{name}##{actionId}", false))
                {
                    targetCombo.ActionIds.Add(actionId);
                    Service.Configuration.Save();
                    _addFromJobTargetCombo = null;
                    ImGui.EndTable();
                    return;
                }
                ImGui.TableNextColumn();
                ImGui.TextUnformatted(actionId.ToString());
            }
            ImGui.EndTable();
        }
    }

    private static string GetActionName(uint actionId)
    {
        if (actionId == 0) return "0";
        try
        {
            var sheet = Service.DataManager.GetExcelSheet<Action>(ClientLanguage.English);
            var row = sheet?.GetRow(actionId);
            if (row != null)
            {
                var nameStr = (row as dynamic)?.Name?.ToString() ?? (row as dynamic)?.Singular?.ToString();
                if (!string.IsNullOrEmpty(nameStr))
                    return $"{nameStr} ({actionId})";
            }
            // Fallback: may be an item ID (e.g. from Consumable Items tab)
            var itemSheet = Service.DataManager.GetExcelSheet<Lumina.Excel.Sheets.Item>(ClientLanguage.English);
            var itemRow = itemSheet?.GetRow(actionId);
            if (itemRow != null)
            {
                var itemName = (itemRow as dynamic)?.Name?.ToString() ?? (itemRow as dynamic)?.Singular?.ToString();
                if (!string.IsNullOrEmpty(itemName))
                    return $"{itemName} [Item] ({actionId})";
            }
        }
        catch { }
        return actionId.ToString();
    }
}