<?php

namespace App\Filament\Resources\AssessmentResource\Pages;

use App\Filament\Resources\AssessmentResource;
use App\Models\Assessment;
use App\Models\Attendances;
use Filament\Actions;
use Filament\Resources\Pages\page;
use App\Models\Student;
use App\Models\TeacherSubject;
use Filament\Forms;
use Filament\Notifications\Notification;
use Illuminate\Support\Collection;

class MultipleAssessments extends page
{
    protected static string $resource = AssessmentResource::class;

    protected static string $view = 'filament.resources.assessment-resource.pages.multiple-assessment';

    use Forms\Concerns\InteractsWithForms;

    public ?int $teacherSubjectId = null;

    public array $students = [];

    public function mount(): void
    {
        $this->form->fill();
    }

    protected function getFormSchema(): array
    {
        return [
            Forms\Components\Select::make('teacherSubjectId')
                ->label('Teacher Subject')
                ->options(
                    TeacherSubject::with(['teacher', 'subject', 'class'])->get()->mapWithKeys(function ($item) {
                        return [
                            $item->id => "{$item->teacher->name} - {$item->subject->name} - {$item->class->class_name}"
                        ];
                    })->toArray()
                )
                ->searchable()
                ->reactive()
                ->afterStateUpdated(fn ($state) => $this->loadStudents()),
        ];
    }

    public function loadStudents(): void
    {
        if (!$this->teacherSubjectId) {
            $this->students = [];
            return;
        }

        $teacherSubject = TeacherSubject::find($this->teacherSubjectId);

        if (!$teacherSubject) {
            $this->students = [];

            Notification::make()
                ->title('Not Found')
                ->body('Selected teacher subject not found.')
                ->danger()
                ->send();

            return;
        }

        $this->students = Student::where('class_id', $teacherSubject->class_id)
            ->get()
            ->map(function ($student) {
                $existingAssessment = Assessment::where('student_id', $student->id)
                    ->where('teacher_subject_id', $this->teacherSubjectId)
                    ->first();

                return [
                    'id' => $student->id,
                    'name' => $student->full_name,
                    'nis' => $student->nis,
                    'score' => $existingAssessment ? $existingAssessment->score : null,
                ];
            })->toArray();
    }

    public function submit(): void
    {
        if (!$this->teacherSubjectId || empty($this->students)) {
            Notification::make()
                ->title('Error')
                ->body('Please select a teacher subject and enter student scores.')
                ->danger()
                ->send();
            return;
        }

        foreach ($this->students as $student) {
            if (!isset($student['score'])) continue;

            Assessment::updateOrCreate(
                [
                    'student_id' => $student['id'],
                    'teacher_subject_id' => $this->teacherSubjectId,
                ],
                [
                    'score' => $student['score'],
                ]
            );
        }

        Notification::make()
            ->title('Success')
            ->body('Assessments saved successfully.')
            ->success()
            ->send();
    }

    protected function getHeaderActions(): array
    {
        return [
            Actions\Action::make('back')
                ->label('Back to Assessments')
                ->url(static::getResource()::getUrl('index')),
        ];
    }

}