<?php

defined( 'ABSPATH' ) || exit;

final class AIparently_Disclosure_Service {
	private $classification;
	private $image_renderer;

	public function __construct( AIparently_Classification_Service $classification, AIparently_Image_Label_Renderer $image_renderer ) {
		$this->classification = $classification;
		$this->image_renderer = $image_renderer;
	}

	public function register_hooks() {
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_styles' ) );
		add_filter( 'the_content', array( $this, 'filter_content' ), 20 );
		add_filter( 'render_block_core/image', array( $this, 'filter_image_block' ), 20, 2 );
		add_filter( 'wp_get_attachment_image', array( $this, 'filter_attachment_image' ), 20, 5 );
		add_filter( 'wp_get_attachment_image_attributes', array( $this, 'add_image_attributes' ), 20, 2 );
		add_filter( 'wp_content_img_tag', array( $this, 'filter_content_image_tag' ), 20, 3 );
	}

	public static function get_settings() {
		return wp_parse_args(
			get_option( 'aiparently_settings', array() ),
			array(
				'enabled'              => 1,
				'position'             => 'after',
				'style'                => 'badge',
				'images_enabled'       => 1,
				'image_label_position' => 'right',
			)
		);
	}

	public function enqueue_styles() {
		if ( ! is_admin() ) {
			wp_enqueue_style( 'aiparently', AIPARENTLY_URL . 'assets/css/frontend.css', array(), AIPARENTLY_VERSION );
			wp_enqueue_script( 'aiparently-frontend', AIPARENTLY_URL . 'assets/js/frontend.js', array(), AIPARENTLY_VERSION, true );
		}
	}

	private function markup( array $decision, $context = 'content' ) {
		if ( empty( $decision['required'] ) ) {
			return '';
		}

		$settings = self::get_settings();
		$classes  = 'aiparently-disclosure aiparently-disclosure--' . sanitize_html_class( $settings['style'] );
		$classes .= ' aiparently-disclosure--' . sanitize_html_class( $context );

		return sprintf(
			'<span class="%1$s" data-aiparently-code="%2$s" data-aiparently-ruleset="%3$s">%4$s</span>',
			esc_attr( $classes ),
			esc_attr( $decision['code'] ),
			esc_attr( $decision['ruleset_version'] ),
			esc_html( $decision['label'] )
		);
	}

	public function filter_content( $content ) {
		$settings = self::get_settings();
		if ( empty( $settings['enabled'] ) || is_admin() || ! is_singular() || ! in_the_loop() || ! is_main_query() ) {
			return $content;
		}

		$post_id = get_the_ID();
		if ( ! in_array( get_post_type( $post_id ), array( 'post', 'page', 'attachment' ), true ) ) {
			return $content;
		}

		$markup = $this->markup( $this->classification->get_decision( $post_id ) );
		if ( ! $markup ) {
			return $content;
		}

		return 'before' === $settings['position'] ? $markup . $content : $content . $markup;
	}

	public function filter_image_block( $block_content, $block ) {
		$post_id  = isset( $block['attrs']['id'] ) ? absint( $block['attrs']['id'] ) : 0;
		if ( ! $post_id ) {
			return $block_content;
		}

		return $this->image_renderer->render_first_image( $post_id, $block_content );
	}

	public function filter_attachment_image( $html, $attachment_id, $size, $icon, $attr ) {
		if ( is_admin() ) {
			return $html;
		}

		return $this->image_renderer->render( $attachment_id, $html );
	}

	/**
	 * Handles raw images in classic/page-builder content through WordPress'
	 * per-image content filter. This is intentionally not a whole-page scan.
	 */
	public function filter_content_image_tag( $filtered_image, $context, $attachment_id ) {
		if ( is_admin() || false !== strpos( $filtered_image, 'data-aiparently-processed' ) ) {
			return $filtered_image;
		}

		$attachment_id = absint( $attachment_id );
		if ( ! $attachment_id ) {
			$attachment_id = $this->image_renderer->resolve_attachment_id( $filtered_image );
		}

		return $attachment_id
			? $this->image_renderer->render( $attachment_id, $filtered_image )
			: $filtered_image;
	}

	public function add_image_attributes( $attr, $attachment ) {
		$decision = $this->classification->get_decision( $attachment->ID );
		if ( ! empty( $decision['required'] ) ) {
			$attr['data-aiparently-code']    = $decision['code'];
			$attr['data-aiparently-ruleset'] = $decision['ruleset_version'];
		}
		return $attr;
	}
}