<?php
/** Closed, source-string-free compatibility report contract. @package Abientot */
namespace Abientot\Migration;
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}
final class ReportSchema {
	const VERSION   = 1;
	const LIMIT     = 16384;
	const SOURCES   = array( 'unknown', 'amelia', 'bookly', 'latepoint', 'ssa', 'bookingpress', 'other' );
	const EDITIONS  = array( 'unknown', 'free', 'paid' );
	const FAMILIES  = array( 'csv', 'json', 'archive', 'xml', 'sql', 'spreadsheet', 'other' );
	const BUCKETS   = array( 'zero', 'one', 'few', 'many', 'large' );
	const SEMANTICS = array( 'unknown', 'customer_email', 'customer_phone', 'customer_name', 'service_name', 'start_time', 'end_time', 'timezone', 'price', 'currency', 'status', 'source_id' );
	const TYPES     = array( 'empty', 'string', 'number', 'boolean', 'null', 'object', 'array' );
	const ISSUES    = array( 'unsupported', 'malformed', 'byte_limit', 'row_limit', 'column_limit', 'cell_limit', 'node_limit', 'depth_limit', 'time_limit' );
	private static function keys( array $value, array $keys ): void {
		$actual = array_keys( $value );
		sort( $actual );
		sort( $keys );
		if ( $actual !== $keys ) {
			throw new \InvalidArgumentException( 'report_shape' );
		}
	}
	private static function member( $value, array $allowed ): string {
		if ( ! is_string( $value ) || ! in_array( $value, $allowed, true ) ) {
			throw new \InvalidArgumentException( 'report_enum' );
		}
		return $value;
	}
	public static function validate( $input ): array {
		if ( ! is_array( $input ) ) {
			throw new \InvalidArgumentException( 'report_shape' );
		}
		self::keys( $input, array( 'version', 'parser', 'declared_source', 'declared_edition', 'family', 'encoding', 'bom', 'delimiter', 'size', 'rows', 'incomplete', 'issues', 'nodes' ) );
		if ( $input['version'] !== 1 || $input['parser'] !== 1 || ! is_bool( $input['bom'] ) || ! is_bool( $input['incomplete'] ) ) {
			throw new \InvalidArgumentException( 'report_version' );
		}
		$out = array(
			'version' => 1,
			'parser'  => 1
		);
		foreach ( array(
			'declared_source'  => self::SOURCES,
			'declared_edition' => self::EDITIONS,
			'family'           => self::FAMILIES,
			'encoding'         => array( 'utf8', 'unknown' ),
			'delimiter'        => array( 'comma', 'semicolon', 'tab', 'none' ),
			'size'             => self::BUCKETS,
			'rows'             => self::BUCKETS
		) as $key => $enum ) {
			$out[ $key ] = self::member( $input[ $key ], $enum );
		}
		$out['bom']        = $input['bom'];
		$out['incomplete'] = $input['incomplete'];
		$out['issues']     = array();
		$out['nodes']      = array();
		if ( ! is_array( $input['issues'] ) || array_values( $input['issues'] ) !== $input['issues'] || count( $input['issues'] ) > 9 || count( array_unique( $input['issues'], SORT_REGULAR ) ) !== count( $input['issues'] ) ) {
			throw new \InvalidArgumentException( 'report_issues' );
		}
		foreach ( $input['issues'] as $issue ) {
			$out['issues'][] = self::member( $issue, self::ISSUES );
		}
		if ( ! is_array( $input['nodes'] ) || array_values( $input['nodes'] ) !== $input['nodes'] || count( $input['nodes'] ) > 30 ) {
			throw new \InvalidArgumentException( 'report_nodes' );
		}
		foreach ( $input['nodes'] as $i => $node ) {
			if ( ! is_array( $node ) ) {
				throw new \InvalidArgumentException( 'report_node' );
			}
			self::keys( $node, array( 'ordinal', 'semantic', 'types', 'email_like', 'phone_like', 'date_like', 'count' ) );
			if ( $node['ordinal'] !== $i + 1 || ! is_array( $node['types'] ) || array_values( $node['types'] ) !== $node['types'] || count( $node['types'] ) > 7 || count( array_unique( $node['types'], SORT_REGULAR ) ) !== count( $node['types'] ) ) {
				throw new \InvalidArgumentException( 'report_node' );
			}
			$safe = array(
				'ordinal'  => $i + 1,
				'semantic' => self::member( $node['semantic'], self::SEMANTICS ),
				'types'    => array(),
				'count'    => self::member( $node['count'], self::BUCKETS )
			);
			foreach ( $node['types'] as $type ) {
				$safe['types'][] = self::member( $type, self::TYPES );
			}
			foreach ( array( 'email_like', 'phone_like', 'date_like' ) as $flag ) {
				if ( ! is_bool( $node[ $flag ] ) ) {
						throw new \InvalidArgumentException( 'report_flag' );
				}
				$safe[ $flag ] = $node[ $flag ];
			}
			$out['nodes'][] = $safe;
		}
		return $out;
	}
	public static function decode( string $json ): array {
		if ( strlen( $json ) > self::LIMIT ) {
			throw new \InvalidArgumentException( 'report_size' );
		}
		$decoded = json_decode( $json, false, 10, JSON_THROW_ON_ERROR );
		if ( ! $decoded instanceof \stdClass || ! is_array( $decoded->issues ?? null ) || ! is_array( $decoded->nodes ?? null ) ) {
			throw new \InvalidArgumentException( 'report_shape' );
		}
		$value = (array) $decoded;
		foreach ( $value['nodes'] as $i => $node ) {
			if ( ! $node instanceof \stdClass ) {
				throw new \InvalidArgumentException( 'report_node' );
			}
			$value['nodes'][ $i ] = (array) $node;
		}
		return self::validate( $value );
	}
	public static function body( array $report ): string {
		return "Abientot compatibility report\n" . wp_json_encode( self::validate( $report ), JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES ) . "\n";
	}
}