<?php
/**
 * Template: ai.json (ADF-005) — Machine-parseable AI permissions.
 *
 * Output validates against the published JSON Schema:
 * https://www.ai-visibility.org.uk/specifications/ai-json/ai-json.schema.json
 *
 * @package AIDF
 * @since   1.0.0
 *
 * @var array<string, mixed> $data Collected site data.
 */

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

// phpcs:disable WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedVariableFound -- Template variables scoped to including method.

$identity    = $data['identity'];
$permissions = $data['permissions'];
$settings    = $data['settings'];
$technical   = $data['technical'];

$map = AIDF_Permissions_Mapper::get_map( $data );

$output = array(
	'$schema' => 'https://www.ai-visibility.org.uk/specifications/ai-json/ai-json.schema.json',
);

if ( ! empty( $technical['language'] ) ) {
	$output['language'] = $technical['language'];
}

$output['name']         = $identity['name'];
$output['url']          = $identity['url'];
$output['permissions']  = $map['permissions'];
$output['restrictions'] = $map['restrictions'];

// Attribution.
$attribution = array(
	'required' => ( 'allow_with_attribution' === $permissions['ai_usage'] ),
);

if ( ! empty( $permissions['citation_format'] ) ) {
	$attribution['format'] = $permissions['citation_format'];
}

$output['attribution'] = $attribution;

// Contact.
$contact = array();

if ( ! empty( $identity['email'] ) ) {
	$contact['email'] = $identity['email'];
}

if ( ! empty( $identity['contact_url'] ) ) {
	$contact['url'] = $identity['contact_url'];
}

if ( ! empty( $contact ) ) {
	$output['contact'] = $contact;
}

// Scope.
$output['scope'] = array(
	'appliesTo' => 'All publicly accessible content on ' . $identity['url'],
);

// Licensing.
$licensing = array(
	'aiTrainingAllowed' => ( 'allow' === $permissions['ai_training'] ),
);

$licence_label = AIDF_Generator::format_licence( $permissions['content_licence'] );

if ( ! empty( $licence_label ) ) {
	$licensing['contentLicense'] = $licence_label;
}

$output['licensing'] = $licensing;

// Metadata.
$output['metadata'] = array(
	'lastUpdated' => wp_date( 'Y-m-d' ),
	'generator'   => 'AI Discovery Files for WordPress v' . AIDF_VERSION,
);

// Cross-references (extension property; the canonical example uses relatedFiles).
$active        = isset( $settings['active_files'] ) ? (array) $settings['active_files'] : array();
$related_files = array();

if ( in_array( 'ai-txt', $active, true ) ) {
	$related_files['humanReadable'] = home_url( '/ai.txt' );
}

if ( in_array( 'identity-json', $active, true ) ) {
	$related_files['identity'] = home_url( '/identity.json' );
}

if ( in_array( 'brand-txt', $active, true ) ) {
	$related_files['brandGuidelines'] = home_url( '/brand.txt' );
}

if ( in_array( 'robots-ai-txt', $active, true ) ) {
	$related_files['crawlerDirectives'] = home_url( '/robots-ai.txt' );
}

if ( ! empty( $related_files ) ) {
	$output['relatedFiles'] = $related_files;
}

// Spec attribution.
$spec_attribution = AIDF_Generator::get_json_attribution( 'ai-json' );

if ( ! empty( $spec_attribution ) ) {
	$output = array_merge( $output, $spec_attribution );
}

echo wp_json_encode( $output, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );