#include "tooltips.h"

#include <game/client/render.h>

CTooltips::CTooltips()
{
    OnReset();
}

void CTooltips::OnReset()
{
    HoverTime = -1;
    m_Tooltips.clear();
}

void CTooltips::SetActiveTooltip(CTooltip &Tooltip)
{
    if(m_ActiveTooltip.has_value())
        return;
       
    m_ActiveTooltip.emplace(Tooltip);
    HoverTime = time_get();
}

inline void CTooltips::ClearActiveTooltip()
{
    m_ActiveTooltip.reset();
}

void CTooltips::DoToolTip(const void *pID, const CUIRect *pNearRect, const char *pText, float WidthHint)
{
    uintptr_t ID = reinterpret_cast<uintptr_t>(pID);

    const auto &it = m_Tooltips.find(ID);

    if(it == m_Tooltips.end())
    {
        CTooltip NewTooltip = {
            .m_Rect = *pNearRect,
            .m_pText = pText,
            .m_WidthHint = WidthHint,
        };

        m_Tooltips[ID] = NewTooltip;

        CTooltip &Tooltip = m_Tooltips[ID];

        if(UI()->MouseInside(&Tooltip.m_Rect))
        {
            SetActiveTooltip(Tooltip);
        }
    }
    else
    {
        if(UI()->MouseInside(&it->second.m_Rect))
        {
            SetActiveTooltip(it->second);
        }
    }
}

void CTooltips::OnRender()
{
    if(m_ActiveTooltip.has_value())
    {
        CTooltip &Tooltip = m_ActiveTooltip.value();

        if(!UI()->MouseInside(&Tooltip.m_Rect))
        {
            ClearActiveTooltip();
            return;
        }

        // Delay tooltip until 1 second passed.
        if(HoverTime > time_get() - time_freq())
            return;

        const float MARGIN = 5.0f;

        CUIRect Rect;
        Rect.w = Tooltip.m_WidthHint;
        if(Tooltip.m_WidthHint < 0.0f)
            Rect.w = TextRender()->TextWidth(0, 14.0f, Tooltip.m_pText, -1, -1.0f) + 4.0f;
        Rect.h = 30.0f;

        CUIRect *pScreen = UI()->Screen();

        // Try the top side.
        if(Tooltip.m_Rect.y - Rect.h - MARGIN > pScreen->y)
        {
            Rect.x = clamp(UI()->MouseX() - Rect.w / 2.0f, MARGIN, pScreen->w - Rect.w - MARGIN);
            Rect.y = Tooltip.m_Rect.y - Rect.h - MARGIN;
        }
        // Try the bottom side.
        else if(Tooltip.m_Rect.y + Tooltip.m_Rect.h + MARGIN < pScreen->h)
        {
            Rect.x = clamp(UI()->MouseX() - Rect.w / 2.0f, MARGIN, pScreen->w - Rect.w - MARGIN);
            Rect.y = Tooltip.m_Rect.y + Tooltip.m_Rect.h + MARGIN;
        }
        // Try the right side.
        else if(Tooltip.m_Rect.x + Tooltip.m_Rect.w + MARGIN + Rect.w < pScreen->w)
        {
            Rect.x = Tooltip.m_Rect.x + Tooltip.m_Rect.w + MARGIN;
            Rect.y = clamp(UI()->MouseY() - Rect.h / 2.0f, MARGIN, pScreen->h - Rect.h - MARGIN);
        }
        // Try the left side.
        else if(Tooltip.m_Rect.x - Rect.w - MARGIN > pScreen->x)
        {
            Rect.x = Tooltip.m_Rect.x - Rect.w - MARGIN;
            Rect.y = clamp(UI()->MouseY() - Rect.h / 2.0f, MARGIN, pScreen->h - Rect.h - MARGIN);
        }

        RenderTools()->DrawUIRect(&Rect, ColorRGBA(0.2, 0.2, 0.2, 0.80f), CUI::CORNER_ALL, 5.0f);
        Rect.Margin(2.0f, &Rect);
        UI()->DoLabel(&Rect, Tooltip.m_pText, 14.0f, TEXTALIGN_LEFT);
    }
}