<?php

declare(strict_types=1);

namespace org\wplake\acf_views;

defined('ABSPATH') || exit;

class Post
{
    const FIELD_TITLE = '_post_title';
    const FIELD_THUMBNAIL = '_thumbnail_id';
    const FIELD_AUTHOR = '_post_author';
    const FIELD_DATE = '_post_date';
    const FIELD_MODIFIED = '_post_modified';

    private int $id;
    private array $fieldsCache;

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

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

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

    public function getThumbnailId(): int
    {
        return function_exists('get_post_thumbnail_id') ?
            (int)get_post_thumbnail_id($this->id) :
            0;
    }

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

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

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

    public function getModifiedDate(): string
    {
        return function_exists('get_the_modified_date') ?
            (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;
        }

        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 {
            $value = function_exists('get_field') ?
                get_field($fieldName, $this->id) :
                '';
        }

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

        return $value;
    }
}