<?php

class Genre
{

    private $id = -1;
    private $enabled = "";
    private $count = 0;
    private $name = "";
    private $slug = "";
    private $db = "";
    private $mixes = [];

    public function __construct($value, $db)
    {
        $this->db = $db;

        if (ctype_digit((string)$value)) {
            $this->id = (int)$value;
            return $this->load_by_id();
        } else {
            $this->slug = $value;
            return $this->load_by_slug();
        }
    }

    private function load_by_id(): bool
    {
        $genre = $this->get_genre_by_id();
        if ($genre && $genre['name'] != "") {
            $this->enabled = $genre['enabled'];
            $this->count = $genre['count'];
            $this->name = $genre['name'];
            $this->slug = $genre['slug'];
            $this->mixes = $this->load_mixes();
            return true;
        } else {
            return false;
        }
    }

    private function get_genre_by_id()
    {
        $stmt = $this->db->prepare("SELECT * FROM genres WHERE id = ?");
        $stmt->bind_param("i", $this->id);
        $stmt->execute();
        $result = $stmt->get_result();
        $dj = $result->fetch_assoc();
        $stmt->close();
        return $dj;
    }

    private function load_by_slug(): bool
    {
        $genre = $this->get_genre_by_slug();

        if ($genre && $genre['name'] != "") {
            $this->id = $genre['id'];
            $this->enabled = $genre['enabled'];
            $this->count = $genre['count'];
            $this->name = $genre['name'];
            $this->mixes = $this->load_mixes();
            return true;
        }
        return false;

    }

    private function get_genre_by_slug()
    {
        $stmt = $this->db->prepare("SELECT * FROM genres WHERE slug = ?");
        $stmt->bind_param("s", $this->slug);
        $stmt->execute();
        $result = $stmt->get_result();
        $dj = $result->fetch_assoc();
        $stmt->close();
        return $dj;
    }

    public function get_slug(): string
    {
        return $this->slug;
    }

    public function get_id(): int
    {
        return $this->id;
    }

    public function get_name(): string
    {
        return $this->name;
    }

    public function get_img(): string
    {
        return "img/no-image1.png";
    }

    public function get_count(): int
    {
        return $this->count;
    }

    public function get_mixes(): array
    {
        return $this->mixes;
    }

    private function load_mixes(): array
    {
        $stmt = $this->db->prepare("SELECT mix_id FROM mix_meta WHERE attribute = 'genre' AND value = ?");
        $stmt->bind_param("i", $this->id);
        $stmt->execute();
        $result = $stmt->get_result();
        $mixes = [];
        while ($row = $result->fetch_assoc()) {
            $mixes[] = $row['mix_id'];
        }
        $stmt->close();
        return $mixes;

    }
}