<?php

namespace AKSRT\WidgetSystem;

defined('ABSPATH') || exit;

/**
 * Builds post queries exclusively from normalized, saved widget settings.
 */
final class PostQuery {
	private const PAY_TYPES = ['reading', 'download', 'gallery', 'video', 'vip'];

	public static function build(array $instance, int $page = 1, array $segment = []): \WP_Query {
		return new \WP_Query(self::arguments($instance, $page, $segment));
	}

	/** @return array<string,mixed> */
	public static function arguments(array $instance, int $page = 1, array $segment = []): array {
		$config = array_merge($instance, $segment);
		$count = max(1, min(50, (int) ($config['count'] ?? 8)));
		$args = [
			'post_type' => 'post',
			'post_status' => 'publish',
			'posts_per_page' => $count,
			'paged' => max(1, $page),
			'ignore_sticky_posts' => true,
			'no_found_rows' => false,
		];

		$categories = RendererHelpers::ids((string) ($config['category_ids'] ?? ''));
		if (!empty($config['category_id'])) {
			$categories = [(int) $config['category_id']];
		}
		if ($categories) {
			$args['category__in'] = $categories;
		}
		$tags = RendererHelpers::ids((string) ($config['tag_ids'] ?? ''));
		if ($tags) {
			$args['tag__in'] = $tags;
		}

		$days = max(0, (int) ($config['limit_day'] ?? 0));
		if ($days > 0) {
			$args['date_query'] = [['after' => gmdate('Y-m-d', time() - ($days * DAY_IN_SECONDS)), 'inclusive' => true]];
		}
		self::apply_order($args, (string) ($config['orderby'] ?? 'date'), (string) ($config['order'] ?? 'DESC'));
		self::apply_pay_type($args, (string) ($config['pay_type'] ?? ''));
		return $args;
	}

	public static function segment(array $instance, string $segment): array {
		$tabs = array_values((array) ($instance['tabs'] ?? []));
		if (!$tabs) {
			return [];
		}
		$index = ctype_digit($segment) ? (int) $segment : 0;
		return isset($tabs[$index]) && is_array($tabs[$index]) ? $tabs[$index] : $tabs[0];
	}

	private static function apply_order(array &$args, string $orderby, string $order): void {
		$args['order'] = strtoupper($order) === 'ASC' ? 'ASC' : 'DESC';
		$meta = [
			'views' => class_exists('AKSRT\\Core\\DomainModel') ? \AKSRT\Core\DomainModel::POST_VIEW_COUNT_KEY : 'aksrt_post_views',
			'likes' => '_aksrt_like_count',
			'favorites' => '_aksrt_favorite_count',
			'downloads' => class_exists('AKSRT\\Core\\DomainModel') ? \AKSRT\Core\DomainModel::RESOURCE_DOWNLOAD_COUNT_KEY : '_aksrt_res_download_count',
		];
		if (isset($meta[$orderby])) {
			$args['meta_key'] = $meta[$orderby];
			$args['orderby'] = 'meta_value_num';
			return;
		}
		if ($orderby === 'comments') {
			$args['orderby'] = 'comment_count';
		} elseif (in_array($orderby, ['date', 'modified', 'rand'], true)) {
			$args['orderby'] = $orderby;
		} else {
			$args['orderby'] = 'date';
		}
	}

	private static function apply_pay_type(array &$args, string $pay_type): void {
		if (!in_array($pay_type, self::PAY_TYPES, true)) {
			return;
		}
		$type_key = class_exists('AKSRT\\Core\\DomainModel') ? \AKSRT\Core\DomainModel::PAY_TYPE_KEY : '_aksrt_pay_type';
		$meta_key = class_exists('AKSRT\\Core\\DomainModel') ? \AKSRT\Core\DomainModel::PAY_META_KEY : '_aksrt_pay';
		$args['meta_query'] = [[
			'relation' => 'OR',
			['key' => $type_key, 'value' => $pay_type, 'compare' => '='],
			['key' => $meta_key, 'value' => '"pay_type";s:' . strlen($pay_type) . ':"' . $pay_type . '"', 'compare' => 'LIKE'],
		]];
	}
}