<?php

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

final class AI_Narration_Free_Lifecycle {
	private const DATA_OWNER_OPTION = 'ai_narration_active_edition';
	private const VERSION_OPTION = 'ai_narration_free_version';
	private const PRO_BASENAME = 'ai-narration-pro/ai-narration-pro.php';

	public static function activate( bool $network_wide = false ): void {
		if ( version_compare( PHP_VERSION, '8.1', '<' ) ) {
			self::fail_activation(
				__( 'AI Narration requires PHP 8.1 or newer.', 'ai-narration' ),
				$network_wide
			);
		}

		if ( self::pro_is_active( $network_wide ) ) {
			self::fail_activation(
				__( 'AI Narration cannot be activated while AI Narration Pro is active. Deactivate AI Narration Pro, then activate AI Narration. Your shared settings and stored audio will remain in place.', 'ai-narration' ),
				$network_wide
			);
		}

		if ( false === get_option( 'ai_narration_settings', false ) ) {
			add_option( 'ai_narration_settings', AI_Narration_Admin::default_settings(), '', false );
		}

		AI_Narration_Background::activate();
		update_option( self::DATA_OWNER_OPTION, 'free', false );
		update_option( self::VERSION_OPTION, AI_NARRATION_VERSION, false );
		self::clear_plugin_update_cache();
	}

	public static function deactivate(): void {
		AI_Narration_Background::deactivate();
		self::clear_plugin_update_cache();
	}

	private static function clear_plugin_update_cache(): void {
		delete_site_transient( 'update_plugins' );
	}

	private static function fail_activation( string $message, bool $network_wide ): void {
		deactivate_plugins( plugin_basename( AI_NARRATION_FILE ), true, $network_wide );
		wp_die(
			esc_html( $message ),
			esc_html__( 'Plugin activation failed', 'ai-narration' ),
			array( 'back_link' => true )
		);
	}

	private static function pro_is_active( bool $network_wide ): bool {
		if ( self::basename_is_active_on_current_site( self::PRO_BASENAME ) || self::basename_is_network_active( self::PRO_BASENAME ) ) {
			return true;
		}

		if ( ! $network_wide || ! is_multisite() || ! function_exists( 'get_sites' ) ) {
			return false;
		}

		$site_ids = get_sites(
			array(
				'fields' => 'ids',
				'number' => 0,
			)
		);
		foreach ( $site_ids as $site_id ) {
			switch_to_blog( (int) $site_id );
			$active = self::basename_is_active_on_current_site( self::PRO_BASENAME );
			restore_current_blog();
			if ( $active ) {
				return true;
			}
		}

		return false;
	}

	private static function basename_is_active_on_current_site( string $basename ): bool {
		$active_plugins = get_option( 'active_plugins', array() );
		return is_array( $active_plugins ) && in_array( $basename, $active_plugins, true );
	}

	private static function basename_is_network_active( string $basename ): bool {
		if ( ! is_multisite() ) {
			return false;
		}
		$network_plugins = get_site_option( 'active_sitewide_plugins', array() );
		return is_array( $network_plugins ) && array_key_exists( $basename, $network_plugins );
	}
}