#include "BrushesPanel.h"
#include <cstdio>
#include "../ManagementContext/StyleManagmentContext.h"
#include "../Tools/Tool.h"

void BrushesPanel::OnActivate()
{
    state = OPEN;
}
void BrushesPanel::OnDeactivate()
{

    state = CLOSED;
}

void BrushesPanel::OnRender()
{
    if (!state) {
        return;
    }
    Tool* activeTool = Tool::GetActive();
    if (!activeTool->UseBrushlist()) {
        return;
    }
    const Brush* activeBrush = activeTool->GetActiveBrush();
    if (activeTool && activeTool->RequestBrushlistRefresh) {
        brushes.clear();
        brushes = activeTool->Brushes;
        activeTool->RequestBrushlistRefresh = false;
        RenderPreviews();
    }


    const ImGuiViewport* viewport = ImGui::GetMainViewport();
    ImVec2 work_pos = viewport->WorkPos;
    ImVec2 work_size = viewport->WorkSize;
    ImVec2 window_pos;

    window_pos.x = work_pos.x + (work_size.x / 2);
    window_pos.y = work_pos.y + work_size.y - 64;
    if (state != DETACHED) {
        ImGui::SetNextWindowPos(window_pos, 0, ImVec2(0.5f, 1.0f));
    }

    ImGui::SetNextWindowSizeConstraints(ImVec2(352, 512), ImVec2(FLT_MAX, FLT_MAX));
    if (!beginCustomWindow("Brushes")) {
        return;
    }
    ImGui::PushItemWidth(-FLT_MIN);

    StyleManagmentContext::Push(BRUSHLIST);
    if (brushes.size() > 0 && ImGui::BeginListBox("##BrushListBox", ImVec2(brushes.front()->Preview->GetWidth(), -FLT_MIN))) {
        static bool usingScrollbar = (int)brushes.size() > 512 / brushes.front()->Preview->GetHeight();
        for (Brush* brush : brushes) {
            char stringBuffers[3][50];
            std::snprintf(stringBuffers[0], sizeof(stringBuffers[0]), "%s", brush->Name.c_str());
            std::snprintf(stringBuffers[1], sizeof(stringBuffers[1]), "%.1f", brush->Size);
            std::snprintf(stringBuffers[2], sizeof(stringBuffers[2]), "##%p", (void*)brush);
            if (brush->IsPreviewDirty()) {
                brush->GeneratePreview();
            }

            Texture* preview = brush->Preview;

            ImVec2 initialPos = ImGui::GetCursorScreenPos();
            ImGui::SetCursorScreenPos(initialPos);
            if (activeBrush && ImGui::Selectable(stringBuffers[2], brush == activeBrush ? true : false, 0, ImVec2(preview->GetWidth(), preview->GetHeight()))) {
                activeTool->SetActiveBrush(brush);
                brush->GeneratePreview();
            }
            ImGui::SetCursorScreenPos(ImVec2(initialPos.x, initialPos.y));
            ImGui::Image(preview->Get(), ImVec2(preview->GetWidth(), preview->GetHeight()));
            /*ImGui::SetCursorScreenPos(ImVec2(initialPos.x + preview->GetWidth() - ImGui::CalcTextSize(" Edit ").x - 4.0f - (usingScrollbar ? 12.0f : 0.0f), initialPos.y + preview->GetHeight() - 24.0f));
            ImGui::PushID(brush);
            ImGui::Button(" Edit ");
            ImGui::PopID();*/
            ImGui::SetCursorScreenPos(ImVec2(initialPos.x + 4.0f, initialPos.y + preview->GetHeight() - 24.0f));
            ImGui::Text("%s", stringBuffers[0]);
            ImGui::SetCursorScreenPos(ImVec2(initialPos.x + preview->GetWidth() - ImGui::CalcTextSize(stringBuffers[1]).x - 4.0f - (usingScrollbar ? 12.0f : 0.0f), initialPos.y + 4.0f));
            ImGui::Text("%s", stringBuffers[1]);
            ImGui::SetCursorScreenPos(ImVec2(initialPos.x, initialPos.y + preview->GetHeight()));
        }
        ImGui::EndListBox();
    }
    StyleManagmentContext::Pop();
    ImGui::PopItemWidth();
    endCustomWindow();
}

void BrushesPanel::RenderPreviews()
{
    for (Brush* brush : brushes) {
        brush->GeneratePreview();
    }
}