<?php

namespace AIbender\ArticleVault\Payments;

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

use AIbender\ArticleVault\Core\Constants;
use WP_Error;

class StripeSession {

	private StripeManager $stripe_manager;

	public function __construct( StripeManager $stripe_manager ) {

		$this->stripe_manager = $stripe_manager;

	}

	public function create_checkout_session(
		int $article_id,
		string $email
	): array|WP_Error {

		$body = array(
			'mode'                                      => 'payment',
			'success_url'                               => $this->stripe_manager->get_success_url( $article_id ),
			'cancel_url'                                => $this->stripe_manager->get_cancel_url( $article_id ),
			'client_reference_id'                       => (string) $article_id,
			'metadata[article_id]'                      => (string) $article_id,
			'line_items[0][quantity]'                   => '1',
			'line_items[0][price_data][currency]'       => $this->stripe_manager->get_currency(),
			'line_items[0][price_data][unit_amount]'    => (string) $this->stripe_manager->get_price_cents(),
			'line_items[0][price_data][product_data][name]' => get_the_title( $article_id ),
		);

		if ( is_email( $email ) ) {
			$body['customer_email'] = $email;
		}

		return $this->stripe_post(
			'/checkout/sessions',
			$body
		);

	}

	public function retrieve_checkout_session(
		string $session_id
	): array|WP_Error {

		return $this->stripe_get(
			'/checkout/sessions/' . rawurlencode( $session_id )
		);

	}

	private function stripe_post(
		string $endpoint,
		array $body
	): array|WP_Error {

		$response = wp_remote_post(
			Constants::STRIPE_API_BASE . $endpoint,
			array(
				'timeout' => 30,
				'headers' => array(
					'Authorization' => 'Bearer ' . $this->stripe_manager->get_secret_key(),
				),
				'body'    => $body,
			)
		);

		return $this->handle_response( $response );

	}

	private function stripe_get( string $endpoint ): array|WP_Error {

		$response = wp_remote_get(
			Constants::STRIPE_API_BASE . $endpoint,
			array(
				'timeout' => 30,
				'headers' => array(
					'Authorization' => 'Bearer ' . $this->stripe_manager->get_secret_key(),
				),
			)
		);

		return $this->handle_response( $response );

	}

	private function handle_response( $response ): array|WP_Error {

		if ( is_wp_error( $response ) ) {
			return $response;
		}

		$status_code = wp_remote_retrieve_response_code( $response );

		$body = json_decode(
			wp_remote_retrieve_body( $response ),
			true
		);

		if ( $status_code < 200 || $status_code >= 300 ) {
			$message = $body['error']['message'] ?? __( 'Stripe request failed.', 'aibender-articlevault-pro' );

			return new WP_Error(
				'articlevault_stripe_error',
				$message
			);
		}

		return is_array( $body ) ? $body : array();

	}

}