using Content.Client._CP14.Workbench;
using Content.Shared._CP14.Skill;
using Content.Shared._CP14.Skill.Prototypes;
using Content.Shared._CP14.Skill.Restrictions;
using Robust.Client.AutoGenerated;
using Robust.Client.GameObjects;
using Robust.Client.UserInterface.Controls;
using Robust.Client.UserInterface.CustomControls;
using Robust.Client.UserInterface.XAML;
using Robust.Shared.Prototypes;

namespace Content.Client._CP14.ResearchTable;

[GenerateTypedNameReferences]
public sealed partial class CP14ResearchTableWindow : DefaultWindow
{
    private const int AllCategoryId = -1;

    [Dependency] private readonly IPrototypeManager _prototype = default!;
    [Dependency] private readonly ILogManager _log = default!;
    [Dependency] private readonly IEntityManager _entity = default!;

    private readonly SpriteSystem _sprite;
    private readonly CP14SharedSkillSystem _skillSystem;

    public event Action<CP14ResearchUiEntry>? OnResearch;

    private readonly Dictionary<int, LocId> _categories = new();

    private CP14ResearchTableUiState? _cachedState;
    private CP14ResearchUiEntry? _selectedEntry;
    private string _searchFilter = string.Empty;

    private ISawmill Sawmill { get; init; }

    public CP14ResearchTableWindow()
    {
        RobustXamlLoader.Load(this);
        IoCManager.InjectDependencies(this);

        _sprite = _entity.System<SpriteSystem>();
        _skillSystem = _entity.System<CP14SharedSkillSystem>();

        Sawmill = _log.GetSawmill("cp14_research_table_window");

        SearchBar.OnTextChanged += OnSearchChanged;
        CraftButton.OnPressed += OnCraftPressed;
        OptionCategories.OnItemSelected += OnCategoryItemSelected;
    }

    public void UpdateRecipesVisibility()
    {
        if (_cachedState is null)
            return;

        CraftsContainer.RemoveAllChildren();

        var recipes = new List<CP14ResearchUiEntry>();
        foreach (var entry in _cachedState.Skills)
        {
            if (!_prototype.TryIndex(entry.ProtoId, out var indexedEntry))
            {
                Sawmill.Error($"No recipe prototype {entry.ProtoId} retrieved from cache found");
                continue;
            }

            if (!ProcessSearchFilter(indexedEntry))
                continue;

            if (!ProcessSearchCategoryFilter(indexedEntry))
                continue;

            recipes.Add(entry);
        }

        recipes.Sort(CP14ResearchUiEntry.CompareTo);

        foreach (var recipe in recipes)
        {
            var control = new CP14ResearchRecipeControl(recipe);
            control.OnResearch += RecipeSelect;

            CraftsContainer.AddChild(control);
        }

        if (_selectedEntry is not null && !recipes.Contains(_selectedEntry.Value))
            RecipeSelectNull();
    }

    public void UpdateState(CP14ResearchTableUiState recipesState)
    {
        _cachedState = recipesState;

        _categories.Clear();
        OptionCategories.Clear();
        OptionCategories.AddItem(Loc.GetString("cp14-recipe-category-all"), AllCategoryId);

        var categories = new List<LocId>();
        var count = 0;

        foreach (var skill in recipesState.Skills)
        {
            if (!_prototype.TryIndex(skill.ProtoId, out var indexedSkill))
                continue;

            if (!_prototype.TryIndex(indexedSkill.Tree, out var indexedTree))
                continue;

            if (categories.Contains(indexedTree.Name))
                continue;

            categories.Add(indexedTree.Name);
        }

        categories.Sort((a, b) => string.Compare(Loc.GetString(a), Loc.GetString(b), StringComparison.Ordinal));

        foreach (var category in categories)
        {
            OptionCategories.AddItem(Loc.GetString(category), count);
            _categories.Add(count, category);
            count++;
        }

        UpdateRecipesVisibility();
    }

    private void OnSearchChanged(LineEdit.LineEditEventArgs _)
    {
        _searchFilter = SearchBar.Text.Trim().ToLowerInvariant();
        UpdateRecipesVisibility();
    }

    private void OnCraftPressed(BaseButton.ButtonEventArgs _)
    {
        if (_selectedEntry is null)
            return;

        OnResearch?.Invoke(_selectedEntry.Value);
    }

    private void OnCategoryItemSelected(OptionButton.ItemSelectedEventArgs obj)
    {
        OptionCategories.SelectId(obj.Id);
        UpdateRecipesVisibility();
    }

    private bool ProcessSearchFilter(CP14SkillPrototype indexedEntry)
    {
        if (_searchFilter == string.Empty)
            return true;

        return Loc.GetString(_skillSystem.GetSkillName(indexedEntry)).Contains(_searchFilter);
    }

    private bool ProcessSearchCategoryFilter(CP14SkillPrototype indexedEntry)
    {
        // If we are searching through all categories, we simply skip the current filter
        if (OptionCategories.SelectedId == AllCategoryId)
            return true;

        if (!_categories.TryGetValue(OptionCategories.SelectedId, out var selectedCategory))
        {
            Sawmill.Error($"Non-existent {OptionCategories.SelectedId} category id selected. Filter skipped");
            return true;
        }

        if (!_prototype.TryIndex(indexedEntry.Tree, out var indexedTree))
        {
            Sawmill.Error($"Non-existent {indexedEntry.Tree} category prototype id. Filter skipped");
            return true;
        }

        return indexedTree.Name == selectedCategory;
    }

    private void RecipeSelect(CP14ResearchTableUiState recipesState)
    {
        foreach (var skill in recipesState.Skills)
        {
            RecipeSelect(skill, _prototype.Index(skill.ProtoId));
            break;
        }
    }

    private void RecipeSelect(CP14ResearchUiEntry cachedEntry)
    {
        if (_cachedState is null)
            return;

        if (_cachedState.Skills.Contains(cachedEntry))
        {
            Sawmill.Warning($"The selected cache option {cachedEntry} isn't found in recipes");
            return;
        }

        RecipeSelect(cachedEntry, _prototype.Index(cachedEntry.ProtoId));
    }

    private void RecipeSelect(CP14ResearchUiEntry entry, CP14SkillPrototype skill)
    {
        _selectedEntry = entry;

        ItemView.Texture = _sprite.Frame0(skill.Icon);
        ItemName.Text = _skillSystem.GetSkillName(skill);
        ItemDescription.Text = _skillSystem.GetSkillDescription(skill);
        ItemRequirements.RemoveAllChildren();

        foreach (var restriction in skill.Restrictions)
        {
            switch (restriction)
            {
                case Researched researched:
                    foreach (var requirement in researched.Requirements)
                    {
                        ItemRequirements.AddChild(new CP14WorkbenchRequirementControl(requirement));
                    }

                    break;
            }
        }

        CraftButton.Disabled = !entry.Craftable;
    }

    private void RecipeSelectNull()
    {
        _selectedEntry = null;

        ItemView.Texture = null;
        ItemName.Text = string.Empty;
        ItemDescription.Text = string.Empty;
        ItemRequirements.RemoveAllChildren();
        CraftButton.Disabled = true;
    }
}