<?php
namespace ScummVM\Models;

use ScummVM\Objects\Screenshot;
use ScummVM\Objects\BasicObject;
use ScummVM\XMLParser;

/**
 * The ScreenshotsModel will generate Screenshot objects.
 */
abstract class ScreenshotsModel extends BasicModel
{
    const INVALID_TARGET = 'Invalid target specified.';
    const INVALID_CATEGORY = 'Invalid category specified.';

    /* Get all screenshots. */
    public static function getAllScreenshots()
    {
        $fname = DIR_DATA . '/screenshots.xml';
        $parser = new XMLParser();
        $a = $parser->parseByFilename($fname);
        $entries = array();
        BasicObject::toArray($a['screenshots']['group']);
        foreach ($a['screenshots']['group'] as $value) {
            BasicObject::toArray($value['game']);
            $games = array();
            foreach ($value['game'] as $data) {
                $games[] = new Screenshot($data);
            }

            $entries[] = array(
                'title' => $value['title'],
                'category' => $value['category'],
                'games' => $games,
            );
        }
        return $entries;
    }

    /* Get all screenshots in one category. */
    public static function getCategoryScreenshots($category)
    {
        $sshots = self::getAllScreenshots();
        foreach ($sshots as $shots) {
            if ($shots['category'] == $category) {
                return $shots;
            }
        }
        throw new \ErrorException(self::INVALID_CATEGORY);
    }

    /* Get screenshots for a specific target. */
    public static function getTargetScreenshots($target)
    {
        $sshots = self::getAllScreenshots();
        foreach ($sshots as $shots) {
            foreach ($shots['games'] as $starget) {
                if ($starget->getCategory() == $target) {
                    return $starget;
                }
            }
        }
        throw new \ErrorException(self::INVALID_TARGET);
    }

    /* Get a random screenshot (an object and not a filename) .*/
    public static function getRandomScreenshot()
    {
        $sshots = self::getAllScreenshots();
        $catpos = rand(0, count($sshots) - 1);
        $scrpos = rand(0, count($sshots[$catpos]['games']) - 1);
        $screenshot = array(
            'category' => $sshots[$catpos]['category'],
            'screenshot' => $sshots[$catpos]['games'][$scrpos],
        );
        unset($sshots);
        return $screenshot;
    }
}