<?php
declare(strict_types=1);

namespace Unsupervised\Schedular\GroupClass;

use Unsupervised\Schedular\Auth\RoleManager;
use Unsupervised\Schedular\Offering\Offering;
use Unsupervised\Schedular\Offering\OfferingRepository;
use Unsupervised\Schedular\Payment\PaymentRepository;

class GroupClassController {

	public function __construct(
		private EnrollmentRepository $enrollments,
		private OfferingRepository $offerings,
		private PaymentRepository $payments,
	) {}

	public function renderPage(): void {
		if ( ! current_user_can( RoleManager::CAP_VIEW_ALL_LESSONS ) ) {
			wp_die( esc_html__( 'You do not have permission to view group classes.', 'unsupervised-schedular' ) );
		}

		$rows = array_map(
			function ( Enrollment $enrollment ): array {
				$offering = $this->offerings->findById( $enrollment->offeringId );
				$student  = get_userdata( $enrollment->studentId );

				return [
					'student'  => $student ? $student->display_name : (string) $enrollment->studentId,
					'offering' => $offering ? $offering->title : (string) $enrollment->offeringId,
					'status'   => $enrollment->status,
				];
			},
			$this->enrollments->findAllActive()
		);

		include USC_PLUGIN_DIR . 'templates/admin/group-classes.php';
	}

	/**
	 * Instructor view: their own group classes with per-class rosters. Each class
	 * shows its enrolment count against capacity plus a roster of enrolled
	 * students with enrolment and payment status.
	 */
	public function renderInstructorPage(): void {
		if ( ! current_user_can( RoleManager::CAP_VIEW_LESSONS ) ) {
			wp_die( esc_html__( 'You do not have permission to view group classes.', 'unsupervised-schedular' ) );
		}

		$instructorId = get_current_user_id();
		$enrollments  = $this->enrollments->findByInstructor( $instructorId );

		$classes = array_map(
			function ( Offering $offering ) use ( $enrollments ): array {
				$roster   = [];
				$enrolled = 0;

				foreach ( $enrollments as $enrollment ) {
					if ( $enrollment->offeringId !== $offering->id ) {
						continue;
					}

					if ( Enrollment::STATUS_ACTIVE === $enrollment->status ) {
						++$enrolled;
					}

					$student = get_userdata( $enrollment->studentId );
					$payment = null !== $enrollment->paymentId ? $this->payments->findById( $enrollment->paymentId ) : null;

					$roster[] = [
						'student' => $student ? $student->display_name : (string) $enrollment->studentId,
						'status'  => $enrollment->status,
						'payment' => $payment?->status,
					];
				}

				return [
					'title'    => $offering->title,
					'capacity' => $offering->capacity,
					'enrolled' => $enrolled,
					'roster'   => $roster,
				];
			},
			$this->offerings->findAll( $instructorId, Offering::KIND_GROUP_CLASS )
		);

		include USC_PLUGIN_DIR . 'templates/admin/my-group-classes.php';
	}
}