<?php
/**
 * Ranktim – Settings repository.
 *
 * Reads and writes plugin settings from wp_options.
 * The integration key is stored encrypted via {@see Ranktim_Encryption}.
 *
 * Stored option shape (wp_options key: ranktim_settings):
 *   {
 *     "integration_key_enc":       "<AES-256-CBC blob>",
 *     "post_mode":                  "publish" | "draft",
 *     "default_category_id":        <int>,
 *     "default_author_id":          <int>,
 *     "default_tag_ids":            [<int>, ...],
 *     "remove_duplicate_content":   true | false
 *   }
 *
 * @package Ranktim
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class Ranktim_Settings {

	/** wp_options key. */
	const OPTION_KEY = 'ranktim_settings';

	/** @var Ranktim_Encryption */
	private Ranktim_Encryption $encryption;

	public function __construct( Ranktim_Encryption $encryption ) {
		$this->encryption = $encryption;
	}

	// -----------------------------------------------------------------------
	// Read
	// -----------------------------------------------------------------------

	/**
	 * Return all settings with the integration key decrypted.
	 *
	 * @return array{
	 *   integration_key: string,
	 *   post_mode: string,
	 *   default_category_id: int,
	 *   default_author_id: int,
	 *   default_tag_ids: int[],
	 *   remove_duplicate_content: bool
	 * }
	 */
	public function get(): array {
		$stored = get_option( self::OPTION_KEY, array() );

		if ( ! is_array( $stored ) ) {
			$stored = array();
		}

		$key = '';
		if ( ! empty( $stored['integration_key_enc'] ) ) {
			$key = $this->encryption->decrypt( $stored['integration_key_enc'] );
		}

		$tag_ids = isset( $stored['default_tag_ids'] ) && is_array( $stored['default_tag_ids'] )
			? array_map( 'intval', $stored['default_tag_ids'] )
			: array();

		// Default to enabled when the setting does not exist yet (fresh installs).
		$remove_duplicate_content = array_key_exists( 'remove_duplicate_content', $stored )
			? ! empty( $stored['remove_duplicate_content'] )
			: true;

		return array(
			'integration_key'          => $key,
			'post_mode'                => $stored['post_mode'] ?? 'publish',
			'default_category_id'      => isset( $stored['default_category_id'] ) ? (int) $stored['default_category_id'] : 0,
			'default_author_id'        => isset( $stored['default_author_id'] ) ? (int) $stored['default_author_id'] : 0,
			'default_tag_ids'          => $tag_ids,
			'remove_duplicate_content' => $remove_duplicate_content,
		);
	}

	/**
	 * Convenience — return only the plaintext integration key.
	 */
	public function get_key(): string {
		return $this->get()['integration_key'];
	}

	/**
	 * Convenience — return only the post mode ("publish" or "draft").
	 */
	public function get_post_mode(): string {
		return $this->get()['post_mode'];
	}

	/**
	 * Convenience — return the default category ID (0 = uncategorised).
	 */
	public function get_default_category_id(): int {
		return $this->get()['default_category_id'];
	}

	/**
	 * Convenience — return the default author ID (0 = use site default).
	 */
	public function get_default_author_id(): int {
		return $this->get()['default_author_id'];
	}

	/**
	 * Convenience — return the default tag IDs (empty array = no tags).
	 *
	 * @return int[]
	 */
	public function get_default_tag_ids(): array {
		return $this->get()['default_tag_ids'];
	}

	/**
	 * Convenience — return whether duplicate content should be stripped.
	 */
	public function get_remove_duplicate_content(): bool {
		return $this->get()['remove_duplicate_content'];
	}

	// -----------------------------------------------------------------------
	// Write
	// -----------------------------------------------------------------------

	/**
	 * Persist settings.
	 *
	 * @param string $integration_key          Plaintext key (will be encrypted).
	 * @param string $post_mode                "publish" or "draft".
	 * @param int    $default_category_id      Term ID of the default category (0 = uncategorised).
	 * @param int    $default_author_id        User ID of the default author (0 = site default).
	 * @param int[]  $default_tag_ids          Array of tag term IDs to apply to every post.
	 * @param bool   $remove_duplicate_content Whether to strip the first heading and image from content.
	 */
	public function save(
		string $integration_key,
		string $post_mode,
		int    $default_category_id      = 0,
		int    $default_author_id        = 0,
		array  $default_tag_ids          = array(),
		bool   $remove_duplicate_content = true
	): void {
		update_option(
			self::OPTION_KEY,
			array(
				'integration_key_enc'       => $this->encryption->encrypt( $integration_key ),
				'post_mode'                 => $post_mode,
				'default_category_id'       => $default_category_id,
				'default_author_id'         => $default_author_id,
				'default_tag_ids'           => array_map( 'intval', $default_tag_ids ),
				'remove_duplicate_content'  => $remove_duplicate_content,
			),
			false // Do not autoload — only needed on specific admin/cron pages.
		);
	}
}