<?php

namespace App\Filament\Resources\AssessmentResource\Pages;

use App\Filament\Resources\AssessmentResource;
use App\Models\Assessment;
use App\Models\Attendances;
use App\Models\ClassStudent;
use Filament\Actions;
use Filament\Forms\Components\Select;
use Filament\Resources\Pages\page;
use App\Models\Student;
use App\Models\TeacherSubject;
use Filament\Forms;
use Filament\Notifications\Notification;
use Illuminate\Support\Collection;
use function Symfony\Component\Translation\t;

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 ?array $data = [];
    public ?int $teacherSubjectId = null;

    public $teacherSubject;

    public array $students = [];

    public $semester = 'first';

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

    protected function getFormSchema(): array
    {
        return [
            Forms\Components\Grid::make(2)
                ->schema([
                    Forms\Components\Select::make('teacherSubjectId')
                        ->label('Teacher Subject')
                        ->options(
                            TeacherSubject::with(['teacher', 'subject', 'class', 'academicYear'])->get()->mapWithKeys(function ($item) {
                                return [
                                    $item->id => "{$item->teacher->name} - {$item->subject->name} - {$item->class->class_name}  - {$item->academicYear->name}"
                                ];
                            })->toArray()
                        )
                        ->searchable()
                        ->reactive()
                        ->afterStateUpdated(function ($state) {
                            $this->teacherSubjectId = $state;
                            $this->loadStudents();
                        }),

                    Forms\Components\Select::make('semester')
                        ->label('Semester')
                        ->required()
                        ->default('first')
                        ->options([
                            'first' => 'First Semester',
                            'second' => 'Second Semester'
                        ])
                        ->live()
                        ->afterStateUpdated(function ($state) {
                            $this->semester = $state;
                            $this->loadStudents();
                        }),
                ]),
        ];
    }

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

        $this->teacherSubject = TeacherSubject::with(['subject','class','academicYear','teacher'])
            ->where('id', $this->teacherSubjectId)
            ->firstOrFail();

        $classStudents = ClassStudent::where('class_room_id', $this->teacherSubject->class_id)
            ->where('academic_year_id', $this->teacherSubject->academic_year_id)
            ->with('student')
            ->get();

        $isSubjectReligion = $this->teacherSubject->subject->is_religious;
        $subjectName = strtolower($this->teacherSubject->subject->name);

        $result = [];

        foreach ($classStudents as $classStudent) {
            $student = $classStudent->student;

            if (!$student) continue; // Jaga-jaga kalau relasi student-nya null

            $existingAssessment = Assessment::where('student_id', $student->id)
                ->where('teacher_subject_id', $this->teacherSubjectId)
                ->where('semester', $this->semester)
                ->first();

            if ($isSubjectReligion) {
                $studentReligion = strtolower($student->religion);

                if (!str_contains($subjectName, $studentReligion)) {
                    continue; // Skip kalau agama tidak cocok
                }
            }

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

        $this->students = $result;
    }

    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'],
                    'semester' => $this->semester,
                ]
            );
        }

        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')),
        ];
    }

}