<?php

namespace Kanboard\Plugin\QualKard;

use Kanboard\Core\Plugin\Base;
use Kanboard\Model\TaskModel;

/**
 * QualKard -- flashcard spaced repetition on Kanboard cards.
 *
 * Each card is a flashcard (title = prompt, description = answer). You grade a due card by dragging
 * it into a grade column (Hairy/Hard/Medium/Easy); QualKard turns the grade into a due date via the
 * qualcard average + interval, and the companion RecoReco plugin does all the card movement.
 *
 * Requires RecoReco (the move engine). Grading math is ported from Ruben's C program "qualcard".
 */
class Plugin extends Base
{
    public function initialize()
    {
        $container = $this->container;

        // Per-board setup/reset/disable on Settings -> Integrations.
        $this->template->hook->attach('template:project:integrations', 'qualKard:project/integration');

        // New card on a QualKard board -> reset it (unread, armed inert, moved to Drafts).
        $this->hook->on('model:task:creation:aftersave', function ($task_id) use ($container) {
            $helper = new \Kanboard\Plugin\QualKard\Helper\QualKardHelper($container);
            $task = $container['taskFinderModel']->getById($task_id);
            if (! empty($task) && $helper->isEnabled($task['project_id'])) {
                $helper->resetCard($task_id, (int) $task['project_id']);
            }
        });

        // Card dragged INTO a grade column -> grade it (RecoReco then handles the movement). The
        // plugin on() wrapper drops the event, so we subscribe on the dispatcher to get the TaskEvent.
        $this->dispatcher->addListener(TaskModel::EVENT_MOVE_COLUMN, function ($event) use ($container) {
            $task = $event['task'];
            $helper = new \Kanboard\Plugin\QualKard\Helper\QualKardHelper($container);
            if (! $helper->isEnabled($task['project_id'])) {
                return;
            }
            $dst = (int) $event['dst_column_id'];
            foreach (array('hairy', 'hard', 'medium', 'easy') as $role) {
                if ($dst === $helper->col($task['project_id'], $role)) {
                    $helper->grade($task['id'], \Kanboard\Plugin\QualKard\Helper\QualKardHelper::SCORE[$role]);
                    return;
                }
            }
        });
    }

    public function getHelpers()
    {
        return array(
            'Plugin\QualKard\Helper' => array('QualKardHelper'),
        );
    }

    public function getPluginName()
    {
        return 'QualKard';
    }

    public function getPluginDescription()
    {
        return t('Flashcard spaced repetition: grade a card by dragging it to a column, and it comes back when due (needs RecoReco).');
    }

    public function getPluginAuthor()
    {
        return 'Ruben (drbeco)';
    }

    public function getPluginVersion()
    {
        return '0.4.0';
    }

    public function getPluginHomepage()
    {
        return 'https://code.beco.cc/beco/QualKard';
    }

    public function getCompatibleVersion()
    {
        return '>=1.2.0';
    }
}