<?php

namespace NoccyLabs\X11;

use IteratorAggregate;
use ArrayIterator;
use Countable;

class WindowList implements IteratorAggregate, Countable
{

    private $windows = [];

    public function __construct(array $windows=null)
    {
        if (null === $windows) {
            $this->readRootWindowTree();
        } elseif (is_array($windows)) {
            $this->windows = $windows;
        }
    }

    public function getIterator()
    {
        return new ArrayIterator($this->windows);
    }

    public function count()
    {
        return count($this->windows);
    }

    private function readRootWindowTree()
    {
        exec("xwininfo -root -tree", $output, $status);
        $this->windows = [];
        foreach ($output as $line) {
            if (preg_match('/^\s+0x([0-9a-f]+?) (.+?)\: \((.+?)\)/', $line, $match)) {
                $this->windows[] = new Window(hexdec($match[1]));
            }
        }
    }

    public function find($title)
    {
        $found = [];
        foreach ($this->windows as $window) {
            if (fnmatch($title, $window->getWindowTitle(), FNM_CASEFOLD)) {
                $found[] = $window;
            }
        }
        return new WindowList($found);
    }

    public function findByClass($class)
    {
        $found = [];
        return new WindowList($found);
    }

    public function getRootWindow()
    {

    }

    public function visible($match=true)
    {
        $found = [];
        $match = (bool)$match;
        foreach ($this->windows as $window) {
            if ($window->isVisible() == $match)
                $found[] = $window;
        }
        return new WindowList($found);
    }

    public function first()
    {
        return count($this->windows)?$this->windows[0]:null;
    }

    public function dump()
    {
        printf("WindowList: (count=%d)\n", count($this));
        foreach ($this as $window) {
            printf("  0x%08x: %s %s\n", $window->getId(), $window->getWindowTitle(), $window->isVisible()?'(Visible)':'');
        }
    }
}