<?php

declare(strict_types=1);

namespace org\wplake\acf_views;

use org\wplake\acf_views\AcfGroups\AcfCardData;
use org\wplake\acf_views\AcfGroups\Field;
use org\wplake\acf_views\AcfGroups\Item;

defined('ABSPATH') || exit;

class ACF
{
    const GROUP_POST = '$post$';

    public function setHooks(): void
    {
        add_filter(
            'acf/load_field/name=' . Item::getAcfFieldName(Item::FIELD_GROUP),
            function (array $field) {
                $field['choices'] = $this->getGroupChoices();

                return $field;
            }
        );

        add_filter(
            'acf/load_field/name=' . Field::getAcfFieldName(Field::FIELD_KEY),
            function (array $field) {
                $field['choices'] = $this->getFieldChoices();

                return $field;
            }
        );

        add_filter(
            'acf/load_field/name=' . AcfCardData::getAcfFieldName(AcfCardData::FIELD_POST_TYPES),
            function (array $field) {
                $field['choices'] = $this->getPostTypeChoices();

                return $field;
            }
        );

        add_filter(
            'acf/load_field/name=' . AcfCardData::getAcfFieldName(AcfCardData::FIELD_POST_STATUSES),
            function (array $field) {
                $field['choices'] = $this->getPostStatusChoices();

                return $field;
            }
        );
    }

    // Important! Use this wrapper to avoid recursion
    public function getGroups(): array
    {
        if (! function_exists('acf_get_field_groups')) {
            return [];
        }

        $acfGroups = acf_get_field_groups();

        // Important! To avoid recursion, otherwise within 'getChoices()' will be available the same group as the current
        // and this class will call 'acf_get_fields()' that will call 'getChoices()'
        $acfGroups = array_filter($acfGroups, function ($acfGroup) {
            $isPrivate = (bool)($acfGroup['private'] ?? false);
            $isOwn     = 0 === strpos($acfGroup['key'], AcfGroup::GROUP_NAME_PREFIX);

            return (! $isPrivate &&
                    ! $isOwn);
        });


        return array_values($acfGroups);
    }

    public function getGroupedFieldTypes(): array
    {
        return [
            'basic'      => [
                'text',
                'textarea',
                'number',
                'range',
                'email',
                'url',
                'password',
            ],
            'content'    => [
                'image',
                'file',
                'wysiwyg',
            ],
            'choice'     => [
                'select',
                'checkbox',
                'radio',
                'true_false',
            ],
            'jquery'     => [
                'date_picker',
                'date_time_picker',
                'time_picker',
                'color_picker',
            ],
            'relational' => [
                'link',
                'page_link',
            ],
        ];
    }

    public function getFieldTypes(): array
    {
        $fieldTypes        = [];
        $groupedFieldTypes = $this->getGroupedFieldTypes();
        foreach ($groupedFieldTypes as $group => $fields) {
            $fieldTypes = array_merge($fieldTypes, $fields);
        }

        return $fieldTypes;
    }

    public function getGroupChoices(): array
    {
        $groupChoices = [
            ''               => 'Select',
            self::GROUP_POST => '$Post$',
        ];

        $groups = $this->getGroups();
        foreach ($groups as $group) {
            $groupId                = $group['key'];
            $groupChoices[$groupId] = $group['title'];
        }

        return $groupChoices;
    }

    public function getFieldChoices(): array
    {
        $fieldChoices = [];

        if (! function_exists('acf_get_fields')) {
            return $fieldChoices;
        }

        $fieldChoices = [
            ''                                                        => 'Select',
            Field::createKey(self::GROUP_POST, Post::FIELD_TITLE)     => 'Title',
            Field::createKey(self::GROUP_POST, Post::FIELD_THUMBNAIL) => 'Thumbnail',
            Field::createKey(self::GROUP_POST, Post::FIELD_AUTHOR)    => 'Author',
            Field::createKey(self::GROUP_POST, Post::FIELD_DATE)      => 'Published date',
            Field::createKey(self::GROUP_POST, Post::FIELD_MODIFIED)  => 'Modified date',
        ];

        $supportedFieldTypes = $this->getFieldTypes();

        $groups = $this->getGroups();
        foreach ($groups as $group) {
            $fields = acf_get_fields($group);

            foreach ($fields as $groupField) {
                if (! in_array($groupField['type'], $supportedFieldTypes, true)) {
                    continue;
                }

                $fullFieldId                = Field::createKey($group['key'], $groupField['key']);
                $fieldChoices[$fullFieldId] = $groupField['label'] . ' (' . $groupField['type'] . ')';
            }
        }

        return $fieldChoices;
    }

    public function getPostTypeChoices(): array
    {
        return get_post_types();
    }

    public function getPostStatusChoices(): array
    {
        return get_post_statuses();
    }
}