<?php

declare(strict_types=1);

namespace org\wplake\acf_views\AcfView;

defined('ABSPATH') || exit;

class Post
{
    const FIELD_TITLE = '_post_title';
    const FIELD_TITLE_LINK = '_post_title_link';
    const FIELD_THUMBNAIL = '_thumbnail_id';
    const FIELD_AUTHOR = '_post_author';
    const FIELD_DATE = '_post_date';
    const FIELD_MODIFIED = '_post_modified';
    const FIELD_EXCERPT = '_post_excerpt';
    const FIELD_LINK = '_post_link';

    private int $id;
    private array $fieldsCache;
    private bool $isBlock;

    public function __construct(int $id, array $fieldsCache = [], bool $isBlock = false)
    {
        $this->id          = $id;
        $this->fieldsCache = $fieldsCache;
        $this->isBlock     = $isBlock;
    }

    public static function getFields(): array
    {
        return [
            self::FIELD_TITLE,
            self::FIELD_THUMBNAIL,
            self::FIELD_AUTHOR,
            self::FIELD_DATE,
            self::FIELD_MODIFIED,
            self::FIELD_EXCERPT,
            self::FIELD_TITLE_LINK,
            self::FIELD_LINK,
        ];
    }

    public function getTitle(): string
    {
        return get_the_title($this->id);
    }

    public function getExcerpt(): string
    {
        return get_the_excerpt($this->id);
    }

    public function getLink(): string
    {
        return get_the_permalink($this->id);
    }

    public function getTitleLink(): array
    {
        // array according to the ACF 'link' with 'array' return format
        return [
            'url'   => $this->getLink(),
            'title' => $this->getTitle(),
        ];
    }

    public function getThumbnailId(): int
    {
        return (int)get_post_thumbnail_id($this->id);
    }

    public function getAuthorName(): string
    {
        $value = get_post_field('post_author', $this->id);
        $value = get_user_by('ID', $value);

        return $value->display_name ?? '';
    }

    public function getDate(): string
    {
        return (string)get_the_date('', $this->id);
    }

    public function getModifiedDate(): string
    {
        return (string)get_the_modified_date('', $this->id);
    }

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

    protected function getPostField(string $fieldName)
    {
        $value = '';

        switch ($fieldName) {
            case self::FIELD_TITLE:
                $value = $this->getTitle();
                break;
            case self::FIELD_THUMBNAIL:
                $value = $this->getThumbnailId();
                break;
            case self::FIELD_AUTHOR:
                $value = $this->getAuthorName();
                break;
            case self::FIELD_DATE:
                $value = $this->getDate();
                break;
            case self::FIELD_MODIFIED:
                $value = $this->getModifiedDate();
                break;
            case self::FIELD_EXCERPT:
                $value = $this->getExcerpt();
                break;
            case self::FIELD_TITLE_LINK:
                $value = $this->getTitleLink();
                break;
            case self::FIELD_LINK:
                $value = $this->getLink();
                break;
        }

        return $value;
    }

    public function getFieldValue(string $fieldName)
    {
        if (isset($this->fieldsCache[$fieldName])) {
            return $this->fieldsCache[$fieldName];
        }

        $value = '';

        if (in_array($fieldName, $this->getFields(), true)) {
            $value = $this->getPostField($fieldName);
        } else {
            if (function_exists('get_field')) {
                $value = ! $this->isBlock ?
                    get_field($fieldName, $this->id) :
                    get_field($fieldName);
            }
        }

        $this->fieldsCache[$fieldName] = $value;

        return $value;
    }
}