#include "WindowManager.h"
#include "Painter.h"
#include "Widget.h"
#include "Window.h"
#include "AbstractScreen.h"

WindowManager& WindowManager::the()
{
    static WindowManager* s_the = new WindowManager;
    return *s_the;
}

WindowManager::WindowManager()
{
}

WindowManager::~WindowManager()
{
}

void WindowManager::paintWindowFrames()
{
    for (auto* window : m_windows)
        paintWindowFrame(*window);
}

void WindowManager::paintWindowFrame(Window& window)
{
    Painter p(*AbstractScreen::the().rootWidget());

    printf("WM: paintWindowFrame {%p}, rect: %d,%d %dx%d\n", &window, window.rect().x(), window.rect().y(), window.rect().width(), window.rect().height());

    static const int windowFrameWidth = 2;
    static const int windowTitleBarHeight = 16;

    Rect topRect {
        window.x() - windowFrameWidth,
        window.y() - windowTitleBarHeight - windowFrameWidth,
        window.width() + windowFrameWidth * 2,
        windowTitleBarHeight + windowFrameWidth };

    Rect bottomRect {
        window.x() - windowFrameWidth,
        window.y() + window.height(),
        window.width() + windowFrameWidth * 2,
        windowFrameWidth };

    Rect leftRect {
        window.x() - windowFrameWidth,
        window.y(),
        windowFrameWidth,
        window.height()
    };

    Rect rightRect {
        window.x() + window.width(),
        window.y(),
        windowFrameWidth,
        window.height()
    };

    static const Color windowBorderColor(0x00, 0x00, 0x80);
    static const Color windowTitleColor(0xff, 0xff, 0xff);

    Rect borderRect {
        topRect.x() - 1, 
        topRect.y() - 1,
        topRect.width() + 2,
        windowFrameWidth + windowTitleBarHeight + window.rect().height() + 4
    };
    p.drawRect(borderRect, Color(255, 255, 255));
    borderRect.inflate(2, 2);
    p.drawRect(borderRect, windowBorderColor);

    p.fillRect(topRect, windowBorderColor);
    p.fillRect(bottomRect, windowBorderColor);
    p.fillRect(leftRect, windowBorderColor);
    p.fillRect(rightRect, windowBorderColor);

    p.drawText(topRect, window.title(), Painter::TextAlignment::Center, windowTitleColor);
}

void WindowManager::addWindow(Window& window)
{
    m_windows.set(&window);
}

void WindowManager::notifyTitleChanged(Window& window)
{
    printf("[WM] ]Window{%p} title set to '%s'\n", &window, window.title().characters());
}

void WindowManager::notifyRectChanged(Window& window, const Rect& oldRect, const Rect& newRect)
{
    printf("[WM] Window %p rect changed (%d,%d %dx%d) -> (%d,%d %dx%d)\n",
        &window,
        oldRect.x(),
        oldRect.y(),
        oldRect.width(),
        oldRect.height(),
        newRect.x(),
        newRect.y(),
        newRect.width(),
        newRect.height());
}