<?php
/**
 * WP-CLI smoke test for MultiSite Post Cloner.
 *
 * Usage:
 *   wp --url=<source_site_url> mspc copy <source_id> --to=<blog_id>
 *
 * Copies a source post (any enabled CPT, auto-detected) to the target subsite
 * and prints (a) a recursive side-by-side dump of every ACF value for visual
 * verification, then (b) the structured warning report read straight from
 * _mspc_clone_warnings — the same JSON the editor panel renders, so the CLI
 * and editor never disagree.
 *
 * Exit code is 0 even when warnings are present (warnings ≠ copy failure).
 * Non-zero only when Post_Cloner::copy() returns WP_Error.
 *
 * @package MultiSitePostCloner
 * @license GPL-2.0-or-later
 */
if ( ! defined( 'ABSPATH' ) ) exit;
if ( ! defined( 'WP_CLI' ) || ! WP_CLI ) {
	return;
}

class MSPC_CLI_Command {

	/**
	 * Copy a post to a target subsite.
	 *
	 * ## OPTIONS
	 *
	 * <source_id>
	 * : Source post ID (must exist on the --url blog and belong to an enabled CPT).
	 *
	 * --to=<blog_id>
	 * : Target blog ID.
	 *
	 * ## EXAMPLES
	 *
	 *     wp --url=https://chicago.example.com mspc copy 123 --to=4
	 *
	 * @when after_wp_load
	 */
	public function copy( $args, $assoc_args ) {
		list( $source_id ) = $args;
		$source_id      = (int) $source_id;
		$target_blog_id = isset( $assoc_args['to'] ) ? (int) $assoc_args['to'] : 0;

		if ( ! $source_id || ! $target_blog_id ) {
			\WP_CLI::error( 'Usage: wp mspc copy <source_id> --to=<blog_id>' );
		}

		$source_post = get_post( $source_id );
		if ( ! $source_post ) {
			\WP_CLI::error( sprintf( 'Source post %d not found on this blog.', $source_id ) );
		}
		$source_cpt = $source_post->post_type;

		$walker        = new \MSPC\ACF_Walker();
		$fields_by_name = $walker->load_fields_for_post( $source_id, $source_cpt );
		$source_values = function_exists( 'get_fields' ) ? get_fields( $source_id, false ) : array();
		if ( ! is_array( $source_values ) ) {
			$source_values = array();
		}
		$source_thumb = (int) get_post_thumbnail_id( $source_id );

		$cloner = new \MSPC\Post_Cloner( $walker );
		$result = $cloner->copy( $source_id, $target_blog_id );
		if ( is_wp_error( $result ) ) {
			\WP_CLI::error( $result->get_error_message() );
		}

		$new_id = (int) $result['new_id'];
		$stats  = isset( $result['stats'] ) ? (array) $result['stats'] : array();
		$report = isset( $result['report'] ) ? (array) $result['report'] : array();
		$id_map = isset( $stats['id_map'] ) ? (array) $stats['id_map'] : array();

		switch_to_blog( $target_blog_id );
		$target_values = function_exists( 'get_fields' ) ? get_fields( $new_id, false ) : array();
		if ( ! is_array( $target_values ) ) {
			$target_values = array();
		}
		$target_thumb = (int) get_post_thumbnail_id( $new_id );
		// Re-read the persisted JSON so we exercise the same source the editor uses.
		$persisted = \MSPC\Warning_Report::read( $new_id );
		restore_current_blog();

		\WP_CLI::log( '' );
		\WP_CLI::log( sprintf( '== Copied [%s] %d → %d (blog %d) ==', $source_cpt, $source_id, $new_id, $target_blog_id ) );
		\WP_CLI::log( '' );

		if ( ! empty( $fields_by_name ) ) {
			\WP_CLI::log( '-- ACF values (source → target) --' );
			$this->print_diff( array_values( $fields_by_name ), $source_values, $target_values, $id_map, 0 );
			\WP_CLI::log( '' );
		} else {
			\WP_CLI::log( '-- No ACF field groups attached to this CPT. ACF diff skipped. --' );
			\WP_CLI::log( '' );
		}

		\WP_CLI::log( '-- Featured image --' );
		\WP_CLI::log( sprintf(
			'  source id=%d → target id=%d %s',
			$source_thumb,
			$target_thumb,
			( $source_thumb && ! $target_thumb ) ? '[MISSING ON TARGET]' : ''
		) );
		\WP_CLI::log( '' );

		\WP_CLI::log( sprintf(
			'-- Sideload summary -- uploaded=%d already_on_target=%d failures=%d reused=%d total=%d',
			(int) ( $stats['successes'] ?? 0 ),
			(int) ( $stats['existing'] ?? 0 ),
			(int) ( $stats['failures'] ?? 0 ),
			(int) ( $stats['reused'] ?? 0 ),
			(int) ( $stats['total'] ?? 0 )
		) );
		\WP_CLI::log( '' );

		$this->print_report( $persisted ?: $report );

		\WP_CLI::log( '' );
		\WP_CLI::log( sprintf( 'Edit on target: %s', $result['edit_url'] ) );
	}

	/**
	 * @param array<int,array<string,mixed>> $fields
	 * @param array<string,mixed>            $src
	 * @param array<string,mixed>            $tgt
	 * @param array<int,int>                 $id_map
	 * @param int                            $indent
	 */
	private function print_diff( array $fields, array $src, array $tgt, array $id_map, $indent ) {
		$pad = str_repeat( '  ', $indent );
		foreach ( $fields as $field ) {
			$name = isset( $field['name'] ) ? $field['name'] : '';
			$type = isset( $field['type'] ) ? $field['type'] : '';
			$key  = isset( $field['key'] ) ? $field['key'] : '';
			$s    = array_key_exists( $name, $src ) ? $src[ $name ] : null;
			$t    = array_key_exists( $name, $tgt ) ? $tgt[ $name ] : null;

			switch ( $type ) {
				case 'image':
				case 'file':
					\WP_CLI::log( sprintf(
						'%s%s [%s] (%s): src=%s → tgt=%s%s',
						$pad,
						$name,
						$type,
						$key,
						$this->scalar_str( $s ),
						$this->scalar_str( $t ),
						$this->flag_attachment_diff( $s, $t, $id_map )
					) );
					break;

				case 'gallery':
					$s_arr = is_array( $s ) ? array_map( array( $this, 'scalar_str' ), $s ) : array();
					$t_arr = is_array( $t ) ? array_map( array( $this, 'scalar_str' ), $t ) : array();
					\WP_CLI::log( sprintf( '%s%s [gallery] (%s):', $pad, $name, $key ) );
					\WP_CLI::log( sprintf( '%s  src=[%s] (count=%d)', $pad, implode( ',', $s_arr ), count( $s_arr ) ) );
					\WP_CLI::log( sprintf( '%s  tgt=[%s] (count=%d)', $pad, implode( ',', $t_arr ), count( $t_arr ) ) );
					if ( count( $s_arr ) !== count( $t_arr ) ) {
						\WP_CLI::log( sprintf( '%s  ⚠ gallery row count mismatch', $pad ) );
					}
					break;

				case 'post_object':
				case 'page_link':
				case 'relationship':
					$s_arr = is_array( $s ) ? array_map( array( $this, 'scalar_str' ), $s ) : array( $this->scalar_str( $s ) );
					$t_arr = is_array( $t ) ? array_map( array( $this, 'scalar_str' ), $t ) : array( $this->scalar_str( $t ) );
					\WP_CLI::log( sprintf(
						'%s%s [%s] (%s): src=[%s] → tgt=[%s]',
						$pad,
						$name,
						$type,
						$key,
						implode( ',', $s_arr ),
						implode( ',', $t_arr )
					) );
					break;

				case 'repeater':
					$s_rows = is_array( $s ) ? count( $s ) : 0;
					$t_rows = is_array( $t ) ? count( $t ) : 0;
					\WP_CLI::log( sprintf(
						'%s%s [repeater] (%s) — src rows=%d / tgt rows=%d%s',
						$pad,
						$name,
						$key,
						$s_rows,
						$t_rows,
						$s_rows !== $t_rows ? ' ⚠ row count mismatch' : ''
					) );
					$rows = max( $s_rows, $t_rows );
					for ( $i = 0; $i < $rows; $i++ ) {
						\WP_CLI::log( sprintf( '%s  row[%d]:', $pad, $i ) );
						$this->print_diff(
							isset( $field['sub_fields'] ) ? (array) $field['sub_fields'] : array(),
							is_array( $s ) && isset( $s[ $i ] ) && is_array( $s[ $i ] ) ? $s[ $i ] : array(),
							is_array( $t ) && isset( $t[ $i ] ) && is_array( $t[ $i ] ) ? $t[ $i ] : array(),
							$id_map,
							$indent + 2
						);
					}
					break;

				case 'group':
					\WP_CLI::log( sprintf( '%s%s [group] (%s):', $pad, $name, $key ) );
					$this->print_diff(
						isset( $field['sub_fields'] ) ? (array) $field['sub_fields'] : array(),
						is_array( $s ) ? $s : array(),
						is_array( $t ) ? $t : array(),
						$id_map,
						$indent + 1
					);
					break;

				default:
					$sv   = $this->truncate( $this->scalar_str( $s ) );
					$tv   = $this->truncate( $this->scalar_str( $t ) );
					$flag = ( $sv !== $tv ) ? ' ⚠ differs' : '';
					\WP_CLI::log( sprintf( '%s%s [%s] (%s): src=%s | tgt=%s%s', $pad, $name, $type, $key, $sv, $tv, $flag ) );
			}
		}
	}

	/**
	 * @param array<string,mixed>|null $report
	 */
	private function print_report( $report ) {
		\WP_CLI::log( '-- Warning report --' );
		if ( empty( $report ) || empty( $report['categories'] ) ) {
			\WP_CLI::log( '  (clean — no warnings)' );
			return;
		}
		$cats = $report['categories'];

		if ( ! empty( $cats['attachments'] ) ) {
			\WP_CLI::log( sprintf( '  attachments failed: %d', count( $cats['attachments'] ) ) );
			foreach ( $cats['attachments'] as $e ) {
				\WP_CLI::log( sprintf(
					'    - %s (src id %d%s)%s',
					$e['field_label'] ?: '(unnamed)',
					(int) ( $e['source_id'] ?? 0 ),
					! empty( $e['source_title'] ) ? ': ' . $e['source_title'] : '',
					( 'gallery_item' === ( $e['kind'] ?? '' ) ) ? ' [gallery]' : ''
				) );
			}
			\WP_CLI::warning( sprintf( '%d attachment(s) failed to sideload. Check error_log for [MSPC] entries.', count( $cats['attachments'] ) ) );
		}

		if ( ! empty( $cats['references'] ) ) {
			\WP_CLI::log( sprintf( '  references unmatched: %d', count( $cats['references'] ) ) );
			foreach ( $cats['references'] as $e ) {
				\WP_CLI::log( sprintf(
					'    - %s [%s]: %s (%s)',
					$e['field_label'] ?: '(unnamed)',
					$e['status'] ?? '',
					$e['source_title'] ?? '',
					$e['source_post_type'] ?? ''
				) );
			}
		}

		if ( ! empty( $cats['locations'] ) ) {
			foreach ( $cats['locations'] as $e ) {
				\WP_CLI::log( sprintf(
					'  field group "%s" (%s rule): %s',
					$e['group_title'] ?? '',
					$e['param'] ?? '',
					'added' === ( $e['status'] ?? '' ) ? 'new post added to location rules' : 'registered in JSON/PHP — add this post to its location rules manually'
				) );
			}
		}

		if ( ! empty( $cats['post_parent'] ) ) {
			foreach ( $cats['post_parent'] as $e ) {
				\WP_CLI::log( sprintf( '  post_parent dropped: "%s" (%s)', $e['source_title'] ?? '', $e['source_post_type'] ?? '' ) );
			}
		}

		if ( ! empty( $cats['taxonomies'] ) ) {
			\WP_CLI::log( sprintf( '  taxonomy terms created: %d', count( $cats['taxonomies'] ) ) );
			foreach ( $cats['taxonomies'] as $e ) {
				\WP_CLI::log( sprintf( '    + %s "%s" (slug: %s)', $e['taxonomy_label'] ?? '', $e['term_name'] ?? '', $e['term_slug'] ?? '' ) );
			}
		}

		if ( ! empty( $cats['drift'] ) ) {
			\WP_CLI::log( sprintf( '  field-group drift: %d', count( $cats['drift'] ) ) );
			foreach ( $cats['drift'] as $e ) {
				\WP_CLI::log( sprintf( '    - %s (key %s)', $e['field_label'] ?: ( $e['field_name'] ?? '' ), $e['field_key'] ?? '' ) );
			}
		}
	}

	private function scalar_str( $value ) {
		if ( is_null( $value ) ) {
			return '∅';
		}
		if ( is_bool( $value ) ) {
			return $value ? 'true' : 'false';
		}
		if ( is_scalar( $value ) ) {
			return (string) $value;
		}
		return wp_json_encode( $value );
	}

	private function truncate( $s ) {
		$s = (string) $s;
		return ( strlen( $s ) > 80 ) ? substr( $s, 0, 77 ) . '...' : $s;
	}

	private function flag_attachment_diff( $src, $tgt, array $id_map ) {
		$sid = (int) $src;
		$tid = (int) $tgt;
		if ( $sid && ! $tid ) {
			return ' ⚠ FAILED (no target ID)';
		}
		if ( $sid && isset( $id_map[ $sid ] ) && (int) $id_map[ $sid ] === $tid ) {
			return ' ✓';
		}
		return '';
	}
}

WP_CLI::add_command( 'mspc', 'MSPC_CLI_Command' );