#include "console_window.h"

#include <stdio.h>


ConsoleWindow::ConsoleWindow()
    : WindowBase("Console")
{
    ClearLog();
    memset(InputBuf, 0, sizeof(InputBuf));

    AutoScroll = true;
    ScrollToBottom = false;
}

ConsoleWindow::~ConsoleWindow()
{
    ClearLog();
}

void ConsoleWindow::ClearLog()
{
    std::scoped_lock<std::mutex> mutex(mLogMutex);
    Items.clear();
}

void ConsoleWindow::Draw()
{
    WindowBase::BeginDraw();

    ImGui::SetWindowSize(ImVec2(520, 600), ImGuiCond_FirstUseEver);


    ImGui::TextWrapped("Console view");
//    ImGui::TextWrapped("Enter 'HELP' for help.");

    // TODO: display items starting from the bottom

//    if (ImGui::SmallButton("Add Debug Text"))  { AddLog("%d some text", Items.Size); AddLog("some more text"); AddLog("display very important message here!"); }
//    ImGui::SameLine();
//    if (ImGui::SmallButton("Add Debug Error")) { AddLog("[error] something went wrong"); }
//    ImGui::SameLine();
    if (ImGui::SmallButton("Clear"))           { ClearLog(); }
    ImGui::SameLine();
    bool copy_to_clipboard = ImGui::SmallButton("Copy");
    //static float t = 0.0f; if (ImGui::GetTime() - t > 0.02f) { t = ImGui::GetTime(); AddLog("Spam %f", t); }

//    ImGui::Separator();

//    // Options menu
//    if (ImGui::BeginPopup("Options"))
//    {
//        ImGui::Checkbox("Auto-scroll", &AutoScroll);
//        ImGui::EndPopup();
//    }

//    // Options, Filter
//    if (ImGui::Button("Options"))
//        ImGui::OpenPopup("Options");
//    ImGui::SameLine();
//    Filter.Draw("Filter (\"incl,-excl\") (\"error\")", 180);
    ImGui::Separator();

    // Reserve enough left-over height for 1 separator + 1 input text
    const float footer_height_to_reserve = ImGui::GetStyle().ItemSpacing.y + ImGui::GetFrameHeightWithSpacing();
    ImGui::BeginChild("ScrollingRegion", ImVec2(0, -footer_height_to_reserve), false, ImGuiWindowFlags_HorizontalScrollbar);
    if (ImGui::BeginPopupContextWindow())
    {
        if (ImGui::Selectable("Clear")) ClearLog();
        ImGui::EndPopup();
    }

    // Display every line as a separate entry so we can change their color or add custom widgets.
    // If you only want raw text you can use ImGui::TextUnformatted(log.begin(), log.end());
    // NB- if you have thousands of entries this approach may be too inefficient and may require user-side clipping
    // to only process visible items. The clipper will automatically measure the height of your first item and then
    // "seek" to display only items in the visible area.
    // To use the clipper we can replace your standard loop:
    //      for (int i = 0; i < Items.Size; i++)
    //   With:
    //      ImGuiListClipper clipper;
    //      clipper.Begin(Items.Size);
    //      while (clipper.Step())
    //         for (int i = clipper.DisplayStart; i < clipper.DisplayEnd; i++)
    // - That your items are evenly spaced (same height)
    // - That you have cheap random access to your elements (you can access them given their index,
    //   without processing all the ones before)
    // You cannot this code as-is if a filter is active because it breaks the 'cheap random-access' property.
    // We would need random-access on the post-filtered list.
    // A typical application wanting coarse clipping and filtering may want to pre-compute an array of indices
    // or offsets of items that passed the filtering test, recomputing this array when user changes the filter,
    // and appending newly elements as they are inserted. This is left as a task to the user until we can manage
    // to improve this example code!
    // If your items are of variable height:
    // - Split them into same height items would be simpler and facilitate random-seeking into your list.
    // - Consider using manual call to IsRectVisible() and skipping extraneous decoration from your items.
    ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(4, 1)); // Tighten spacing
     if (copy_to_clipboard)
         ImGui::LogToClipboard();

    ImGuiListClipper clipper;
    std::scoped_lock<std::mutex> mutex(mLogMutex);
    clipper.Begin(Items.size());
    while (clipper.Step())
    {
        for (int i = clipper.DisplayStart; i < clipper.DisplayEnd; i++)
        {
            if (Items[i].type > 0)
            {
                ImGui::PushStyleColor(ImGuiCol_Text, IM_COL32(255,0,0,255));
            }
            ImGui::TextUnformatted(Items[i].text.c_str());

            if (Items[i].type > 0)
            {
                ImGui::PopStyleColor();
            }
        }
    }
            /*
    for (int i = 0; i < Items.Size; i++)
    {
        const char* item = Items[i];
        if (!Filter.PassFilter(item))
            continue;

        // Normally you would store more information in your item than just a string.
        // (e.g. make Items[] an array of structure, store color/type etc.)
        ImVec4 color;
        bool has_color = false;
        if (strstr(item, "[error]"))          { color = ImVec4(1.0f, 0.4f, 0.4f, 1.0f); has_color = true; }
        else if (strncmp(item, "# ", 2) == 0) { color = ImVec4(1.0f, 0.8f, 0.6f, 1.0f); has_color = true; }
        if (has_color)
            ImGui::PushStyleColor(ImGuiCol_Text, color);
        ImGui::TextUnformatted(item);
        if (has_color)
            ImGui::PopStyleColor();
    }
    */
     if (copy_to_clipboard)
         ImGui::LogFinish();

    if (ScrollToBottom || (AutoScroll && ImGui::GetScrollY() >= ImGui::GetScrollMaxY()))
        ImGui::SetScrollHereY(1.0f);
    ScrollToBottom = false;

    ImGui::PopStyleVar();
    ImGui::EndChild();
    ImGui::Separator();

   WindowBase::EndDraw();
}