<?php
/**
 * Profile manager.
 *
 * @package SpinxQuickMigrate
 */

namespace SpinxQM;

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

/**
 * Stores and retrieves saved and recent migration profiles.
 */
class Profile_Manager {
	/**
	 * Get saved profiles.
	 */
	public static function get_saved(): array {
		$profiles = get_option( 'spinxqm_profiles_saved', array() );
		return is_array( $profiles ) ? array_values( $profiles ) : array();
	}

	/**
	 * Get recent unsaved profiles.
	 */
	public static function get_recent(): array {
		$profiles = get_option( 'spinxqm_profiles_recent', array() );
		return is_array( $profiles ) ? array_values( $profiles ) : array();
	}

	/**
	 * Check whether a profile name already exists (case-insensitive).
	 *
	 * @param string $name       Candidate name.
	 * @param string $ignore_id  Optional profile id to exclude (for rename).
	 */
	public static function name_exists( string $name, string $ignore_id = '' ): bool {
		$needle = strtolower( trim( $name ) );
		if ( '' === $needle ) {
			return false;
		}
		foreach ( self::get_saved() as $profile ) {
			if ( $ignore_id && isset( $profile['id'] ) && $profile['id'] === $ignore_id ) {
				continue;
			}
			if ( strtolower( (string) ( $profile['name'] ?? '' ) ) === $needle ) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Save named profile.
	 *
	 * @param string              $name    Profile name.
	 * @param string              $type    Profile type (e.g. export, backup, find_replace).
	 * @param array<string,mixed> $payload Profile configuration.
	 * @return array<string,mixed> The saved profile item.
	 */
	public static function save( string $name, string $type, array $payload ): array {
		$profiles   = self::get_saved();
		$id         = wp_generate_uuid4();
		$item       = array(
			'id'         => $id,
			'name'       => sanitize_text_field( $name ),
			'type'       => sanitize_key( $type ),
			'payload'    => $payload,
			'created_at' => time(),
			'updated_at' => time(),
		);
		$profiles[] = $item;
		update_option( 'spinxqm_profiles_saved', $profiles, false );
		return $item;
	}

	/**
	 * Overwrite an existing profile's type + payload with the current configuration.
	 * Keeps created_at; bumps updated_at. When $name is a non-empty string the profile is
	 * also renamed (caller is responsible for the duplicate-name check). Returns the updated
	 * item, or null if no profile matched the id.
	 *
	 * @param string              $id      Profile ID.
	 * @param string              $type    Profile type.
	 * @param array<string,mixed> $payload Profile configuration.
	 * @param string|null         $name    Optional new name.
	 * @return array<string,mixed>|null
	 */
	public static function update( string $id, string $type, array $payload, ?string $name = null ): ?array {
		$profiles = self::get_saved();
		$updated  = null;
		foreach ( $profiles as &$profile ) {
			if ( isset( $profile['id'] ) && $profile['id'] === $id ) {
				$profile['type']    = sanitize_key( $type );
				$profile['payload'] = $payload;
				if ( null !== $name && '' !== trim( $name ) ) {
					$profile['name'] = sanitize_text_field( $name );
				}
				$profile['updated_at'] = time();
				$updated               = $profile;
				break;
			}
		}
		unset( $profile );
		if ( null !== $updated ) {
			update_option( 'spinxqm_profiles_saved', $profiles, false );
		}
		return $updated;
	}

	/**
	 * Rename profile.
	 *
	 * @param string $id   Profile ID.
	 * @param string $name New profile name.
	 * @return bool Whether a profile was renamed.
	 */
	public static function rename( string $id, string $name ): bool {
		$profiles = self::get_saved();
		$changed  = false;
		foreach ( $profiles as &$profile ) {
			if ( isset( $profile['id'] ) && $profile['id'] === $id ) {
				$profile['name']       = sanitize_text_field( $name );
				$profile['updated_at'] = time();
				$changed               = true;
				break;
			}
		}
		if ( $changed ) {
			update_option( 'spinxqm_profiles_saved', $profiles, false );
		}
		return $changed;
	}

	/**
	 * Delete profile.
	 *
	 * @param string $id Profile ID.
	 * @return bool Whether a profile was deleted.
	 */
	public static function delete( string $id ): bool {
		$profiles = self::get_saved();
		$before   = count( $profiles );
		$profiles = array_values(
			array_filter(
				$profiles,
				static function ( $item ) use ( $id ) {
					return ! isset( $item['id'] ) || $item['id'] !== $id;
				}
			)
		);
		if ( count( $profiles ) !== $before ) {
			update_option( 'spinxqm_profiles_saved', $profiles, false );
			return true;
		}
		return false;
	}

	/**
	 * Save recent unsaved profile.
	 *
	 * @param string              $label   Display label.
	 * @param string              $type    Profile type.
	 * @param array<string,mixed> $payload Profile configuration.
	 * @return array<string,mixed> The stored recent item.
	 */
	public static function save_recent( string $label, string $type, array $payload ): array {
		$settings = Helpers::get_settings();
		$max      = max( 1, absint( $settings['max_recent_unsaved'] ) );
		$recent   = self::get_recent();
		$item     = array(
			'id'         => wp_generate_uuid4(),
			'label'      => sanitize_text_field( $label ),
			'type'       => sanitize_key( $type ),
			'payload'    => $payload,
			'created_at' => time(),
		);
		array_unshift( $recent, $item );
		$recent = array_slice( $recent, 0, $max );
		update_option( 'spinxqm_profiles_recent', $recent, false );
		return $item;
	}

	/**
	 * Delete a recent unsaved profile by id.
	 *
	 * @param string $id Recent profile ID.
	 * @return bool Whether a recent profile was deleted.
	 */
	public static function delete_recent( string $id ): bool {
		$recent = self::get_recent();
		$before = count( $recent );
		$recent = array_values(
			array_filter(
				$recent,
				static function ( $item ) use ( $id ) {
					return ! isset( $item['id'] ) || $item['id'] !== $id;
				}
			)
		);
		if ( count( $recent ) !== $before ) {
			update_option( 'spinxqm_profiles_recent', $recent, false );
			return true;
		}
		return false;
	}
}