<?php

namespace App\Entity;

class Note
{
    const HIGHLIGHT_PATTERN = '/<span\s+([^>]*)>(.*?)<\/span>/i';
    const HIGHLIGHT_ATTR_KANJI = 'style="color: rgb(255, 78, 8);"';

    private   readonly int    $id;
    private   readonly int    $mod;
    private   readonly string $model;
    private            string $profile;
    private            array  $cardIds   = [];
    protected          array  $fields    = [];
    private            array  $tags      = [];


    // -------------------------------------------------- Getters & setters ---

    public function getId(): int
    {
        return $this->id;
    }
    public function getModel(): string
    {
        return $this->model;
    }

    public function getFields(): array
    {
        return $this->fields;
    }
    public function setFields(array $fields): static
    {
        $this->fields = $fields;
        return $this;
    }


    // ------------------------------------------------------- Anki-related ---

    public static function fromAnki(array $noteInfo): static
    {
        $note = new static();

        [
            'noteId'    => $note->id,
            'mod'       => $note->mod,
            'profile'   => $note->profile,
            'tags'      => $note->tags,
            'modelName' => $note->model,
            'cards'     => $note->cardIds,
        ] = $noteInfo;

        // the fields array key value comes with an order fields that is
        // already maintained by PHP since arrays are ordered dictionaries.
        // So we can safely just drop it.
        //
        // REVIEW: Having said that, maybe ordering the array before throwing
        //         the order would be advisable.
        $note->fields = array_map(fn($x) => $x['value'], $noteInfo['fields']);

        return $note;
    }

    public function toAnki(): array
    {
        return [
            'id' => $this->id,
        ];
    }


    // ---------------------------------------------------- Derived methods ---

    public function getCreatedAt(): \DateTimeImmutable
    {
        $timestamp = ceil($this->id / 1000);
        return \DateTimeImmutable::createFromFormat('U', $timestamp);
    }

    public function getUpdatedAt(): \DateTimeImmutable
    {
        return \DateTimeImmutable::createFromFormat('U', $this->mod);
    }
}