<?php
/**
 * Holds the holds the comment handler class.
 *
 * @package Sakura
 */

namespace Sakura;

/**
 * Handles and serves comments on pages.
 * Needs a reimplementation.
 *
 * @package Sakura
 * @author Julian van de Groep <me@flash.moe>
 */
class Comments
{
    /**
     * The array containing the comments.
     *
     * @var array
     */
    public $comments = [];

    /**
     * The comment category.
     *
     * @var string
     */
    public $category;

    /**
     * The amount of comments.
     * @var int
     */
    public $count = 0;

    /**
     * Constructor.
     *
     * @param mixed $category The category that comments should be fetched from.
     */
    public function __construct($category)
    {
        // Set category
        $this->category = $category;

        // Get the comments and assign them to $comments
        $comments = DB::table('comments')
            ->where('comment_category', $this->category)
            ->where('comment_reply_to', 0)
            ->orderBy('comment_id', 'desc')
            ->get();

        // Feed them into the sorter
        $this->comments = $this->sortComments($comments);
    }

    /**
     * Sort the comments.
     *
     * @param array $comments Array containing comments.
     *
     * @return array Array containing the sorted comments.
     */
    public function sortComments($comments)
    {
        // Create storage array
        $layer = [];

        // Sort comments
        foreach ($comments as $comment) {
            // Temporary hackjob to get rid of the old database layer, will reimplement later
            $comment = get_object_vars($comment);

            // Attach the poster
            $comment['comment_poster'] = User::construct($comment['comment_poster']);
            $comment['comment_text'] = BBcode::parseEmoticons(Utils::cleanString($comment['comment_text']));

            // Get likes and dislikes
            $votes = $this->getVotes($comment['comment_id']);
            $comment['comment_likes'] = 0;
            $comment['comment_dislikes'] = 0;

            // Store amount in their respective variables
            foreach ($votes as $vote) {
                $vote = get_object_vars($vote);
                if ($vote['vote_state']) {
                    $comment['comment_likes'] += 1;
                } else {
                    $comment['comment_dislikes'] += 1;
                }
            }

            // Add post to posts array
            $layer[$comment['comment_id']] = $comment;

            // Up the comment count
            $this->count += 1;

            // Attempt to get replies from the database
            $replies = DB::table('comments')
                ->where('comment_category', $this->category)
                ->where('comment_reply_to', $comment['comment_id'])
                ->orderBy('comment_id', 'desc')
                ->get();

            // Check if this was a reply to something
            if ($replies) {
                // Save the replies
                $layer[$comment['comment_id']]['comment_replies'] = $this->sortComments($replies);
            }
        }

        return $layer;
    }

    /**
     * Get a single comment.
     *
     * @param int $cid ID of the comment.
     *
     * @return array The comment.
     */
    public function getComment($cid)
    {
        // Get from database
        $comment = DB::table('comments')
            ->where('comment_id', $cid)
            ->get();

        return $comment ? get_object_vars($comment[0]) : [];
    }

    /**
     * Get the votes for a comment.
     *
     * @param int $cid ID of the comment.
     *
     * @return array The votes.
     */
    public function getVotes($cid)
    {
        // Get from database
        $comment = DB::table('comment_votes')
            ->where('vote_comment', $cid)
            ->get();

        return $comment;
    }

    /**
     * Creating a new comment.
     *
     * @param int $uid ID of the user creating the comment.
     * @param int $reply ID of the comment that is being replied to.
     * @param string $content Contents of the comment.
     *
     * @return array Response identifier.
     */
    public function makeComment($uid, $reply, $content)
    {
        // Check if the comment is long enough
        if (strlen($content) < Config::get('comment_min_length')) {
            return [0, 'TOO_SHORT'];
        }

        // Check if the comment isn't too long
        if (strlen($content) > Config::get('comment_max_length')) {
            return [0, 'TOO_LONG'];
        }

        // Insert into database
        DB::table('comments')
            ->insert([
                'comment_category' => $this->category,
                'comment_timestamp' => time(),
                'comment_poster' => (int) $uid,
                'comment_reply_to' => (int) $reply,
                'comment_text' => $content,
            ]);

        // Return success
        return [1, 'SUCCESS'];
    }

    /**
     * Making a vote.
     *
     * @param int $uid User making this vote.
     * @param int $cid ID of the comment that is being voted on.
     * @param int $mode Positive or negative vote.
     *
     * @return bool Always returns true.
     */
    public function makeVote($uid, $cid, $mode)
    {
        // Attempt to get previous vote
        $vote = DB::table('comment_votes')
            ->where('vote_user', $uid)
            ->where('vote_comment', $cid)
            ->get();

        // Check if anything was returned
        if ($vote) {
            // Check if the vote that's being casted is the same
            if ($vote[0]->vote_state == $mode) {
                // Delete the vote
                DB::table('comment_votes')
                    ->where('vote_user', $uid)
                    ->where('vote_comment', $cid)
                    ->delete();
            } else {
                // Otherwise update the vote
                DB::table('comment_votes')
                    ->where('vote_user', $uid)
                    ->where('vote_comment', $cid)
                    ->update([
                        'vote_state' => $mode,
                    ]);
            }
        } else {
            // Create a vote
            DB::table('comment_votes')
                ->insert([
                    'vote_user' => $uid,
                    'vote_comment' => $cid,
                    'vote_state' => $mode,
                ]);
        }

        return true;
    }

    /**
     * Remove a comment
     *
     * @param int $cid ID of the comment to remove.
     */
    public function removeComment($cid)
    {
        // Remove from database
        DB::table('comments')
            ->where('comment_id', $cid)
            ->delete();
    }
}