/**
 * @author Christian Burger (christian@krikkel.de)
 */

#include <kNCurses/VerticalTilingWindowManager.hpp>
#include <kNCurses/Window.hpp>
#include <ncursesw/ncurses.h>
#include <algorithm>

namespace krikkel::NCurses
{
    using std::list;
    using std::recursive_mutex;
    using std::scoped_lock;
    using std::find;

    VerticalTilingWindowManager::VerticalTilingWindowManager(NCursesWindow *rootWindow, recursive_mutex *ncursesMutex)
            : rootWindow(new Window(*rootWindow)), ncursesMutex(ncursesMutex)
    {}

    void VerticalTilingWindowManager::addWindow(Window *window)
    {
        stack.push_back(window);
        visibleStack.push_back(window);
    }

    void VerticalTilingWindowManager::hideWindow(Window *window)
    {
        visibleStack.remove(window);
        window->hidden = true;
    }

    void VerticalTilingWindowManager::showWindow(Window *window)
    {
        if(!window->hidden)
            return;

        list<Window *>::iterator currentVisibleWindow = visibleStack.begin();
        for(Window *currentWindow : stack)
        {
            if(currentWindow == window)
            {
                visibleStack.insert(currentVisibleWindow, window);
                window->hidden = false;
                break;
            }
            if(currentWindow != (*currentVisibleWindow))
                continue;
            ++currentVisibleWindow;
        }
    }

    void VerticalTilingWindowManager::refresh()
    {
        scoped_lock lock(*ncursesMutex);

        rootWindow->refresh();
        for(Window *window : visibleStack)
            window->refresh();
    }

    SingleUserInput VerticalTilingWindowManager::readSingleUserInput()
    {
        return rootWindow->readSingleUserInput();
    }

    void VerticalTilingWindowManager::updateLayout()
    {
        size_t stackSize = visibleStack.size();
        if(stackSize == 0)
        {
            rootWindow->clear();
            return;
        }

        scoped_lock lock(*ncursesMutex);
        int availableWidth = rootWindow->width();
        int availableHeight = rootWindow->height();
        int windowHeight =  availableHeight / stackSize - 1;

        if((windowHeight + 1) * stackSize < availableHeight)
            ++windowHeight;

        uint16_t y = 0;
        list<Window *>::iterator it = visibleStack.begin();
        for(size_t index = 0
                 ; index < visibleStack.size() - 1
                 ; ++index)
        {
            resizeWindowInStack(*it++, y, windowHeight, availableWidth);
            y += windowHeight;
            {
                rootWindow->move(y++, 0);
                rootWindow->hline(availableWidth);
            }
        }
        resizeWindowInStack(*it, y, availableHeight - y, availableWidth);
    }

    void VerticalTilingWindowManager::resizeWindowInStack(Window *window, uint16_t y, uint16_t height, uint16_t width)
    {
        window->resize(height, width);
        window->mvwin(y, 0);
    }
}