<?php

namespace App\Http\Controllers;

use App\Models\AcademicYear;
use App\Models\Assessment;
use App\Models\AssessmentLearningObjective;
use App\Models\ClassRoom;
use App\Models\CompetencyAchievement;
use App\Models\ExtracurricularAssessment;
use App\Models\HomeRoomTeacher;
use App\Models\SchoolInformation;
use App\Models\Student;
use Barryvdh\DomPDF\Facade\Pdf;
use Filament\Notifications\Notification;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class ReportPDFController extends Controller
{
    public $student;
    public $class;
    public $class_name;
    public $academic_year;
    public $semester;

    public $school_information;

    public $table = [];

    public $home_room_teacher;

    public function reportPDF(Request $request)
    {
        $params = $request->query();
        $defaultParams = ["studentId", "classId", "yearId", "semester", "sakit", "izin", "tanpa_keterangan"];

        try {
            $this->validateParameters($params, $defaultParams);
        } catch (\Illuminate\Validation\ValidationException $e) {
            Notification::make()
                ->title('Parameter tidak valid: ' . $e->getMessage())
                ->danger()
                ->send();
            return back();
        }


        $this->student = Student::findOrFail($params["studentId"]);
        $this->class = ClassRoom::findOrFail($params["classId"]);
        $this->academic_year = AcademicYear::findOrFail($params["yearId"]);
        $this->semester = $params["semester"];

        $this->school_information = SchoolInformation::firstOrFail();

        $this->class_name = $this->toRoman($this->class->class_level) . ' ' . $this->extractClassLetter($this->class->class_name);

        $this->loadAssessment();

        $data = [
            'student' => $this->student,
            'school_information' => $this->school_information,
            'table' => $this->table,
            'sakit' => $params['sakit'],
            'izin' => $params['izin'],
            'tanpa_keterangan' => $params['tanpa_keterangan'],
            'class_name' => $this->class_name,
            'semester' => $params['semester'],
            'academic_year' => $this->academic_year,
            'home_room_teacher' => $this->home_room_teacher,
        ];

        $pdf = Pdf::loadView('print.report', $data)
            ->setPaper('a4', 'portrait')
            ->setOption('isRemoteEnabled', true)
            ->setOption('isHtml5ParserEnabled', true);

        return response()->streamDownload(
            function () use ($pdf) {
                echo $pdf->stream();
            },
            'Rapor_' . $this->student->full_name . '.pdf'
        );
    }

    protected function loadAssessment(): void
    {
        $student_id = $this->student->id;
        $class_id = $this->class->id;
        $semester = $this->semester;
        $year_id = $this->academic_year->id;

        // Assessment Mapping
        $assessments = Assessment::where('semester', $this->semester)
            ->whereHas('teacherSubject', function($query) use ($class_id, $year_id) {
                $query->where('academic_year_id', $year_id)
                    ->where('class_id', $class_id);
            })
            ->where('student_id', $this->student->id)
            ->with('teacherSubject.subject', 'student')
            ->get()
            ->map(function ($as) use ($class_id) {
                $subject = $as->teacherSubject->subject ?? null;

                if (!$subject) {
                    return null;
                }

                $assesmentLearningObjectivesLower = AssessmentLearningObjective::with('learningObjective')
                    ->where('teacher_subject_id', $as->teacherSubject->id)
                    ->where('student_id', $this->student->id)
                    ->where('type', 'lower')
                    ->get()
                    ->pluck('learningObjective.description')
                    ->toArray();

                $joinedStringLower = $as->student->full_name . ' perlu peningkatan dalam ' . implode(', ', $assesmentLearningObjectivesLower);

                $assesmentLearningObjectivesHighest = AssessmentLearningObjective::with('learningObjective')
                    ->where('teacher_subject_id', $as->teacherSubject->id)
                    ->where('student_id', $this->student->id)
                    ->where('type', 'highest')
                    ->get()
                    ->pluck('learningObjective.description')
                    ->toArray();

                $joinedStringHighest = $as->student->full_name . ' menunjukan pemahaman dalam ' . implode(', ', $assesmentLearningObjectivesHighest);

                return [
                    "score" => $as->score,
                    "subject" => $subject->name,
                    "category" => $subject->category,
                    "lower" => $assesmentLearningObjectivesLower ? $joinedStringLower : null,
                    "highest" => $assesmentLearningObjectivesHighest ? $joinedStringHighest : null,
                ];
            })
            ->filter() // Hapus null jika ada
            ->sortByDesc('subject')
            ->sortBy(function ($item) {
                return $item['category'] === 'umum' ? 0 : 1;
            })
            ->values()
            ->toArray();

        $this->table["assessments"]['umum'] = array_filter($assessments, function ($item) {
            return $item["category"] === "umum";
        });

        $this->table["assessments"]['muatan lokal'] = array_filter($assessments, function ($item) {
            return $item["category"] === "muatan lokal";
        });

        $this->table["assessments"]['seni'] = array_filter($assessments, function ($item) {
            return $item["category"] === "seni";
        });

        $extracurricular = ExtracurricularAssessment::with('classStudent','extracurricular')
            ->where('semester', $this->semester)
            ->whereHas('classStudent', function($query) use ($class_id, $year_id) {
                $query->where('academic_year_id', $year_id)
                    ->where('class_room_id', $class_id)
                    ->where('student_id', $this->student->id);
            })
            ->get()
            ->map(function ($as) {
                return [
                    "name" => $as->extracurricular->name,
                    "predicate" => $as->predicate,
                    "description" => $as->description,
                ];
            })
            ->toArray();

        $this->table["extracurricular"] = $extracurricular;

        $homeRoom = HomeRoomTeacher::with(['teacher'])
            ->where('class_room_id', $this->class->id)
            ->where('academic_year_id', $this->academic_year->id)
            ->first();

        if ($homeRoom) {
            $this->home_room_teacher = $homeRoom ?? [];
        }
    }

    protected function validateParameters(array $params, array $allowedParams): void
    {
        $validator = Validator::make($params, [
            'studentId' => 'required|integer',
            'classId' => 'required|integer',
            'yearId' => 'required|integer',
            'semester' => 'required|in:first,second',
            'sakit' => 'nullable|integer|min:0',
            'izin' => 'nullable|integer|min:0',
            'tanpa_keterangan' => 'nullable|integer|min:0',
        ]);

        if ($validator->fails()) {
            throw new \Illuminate\Validation\ValidationException($validator);
        }

        foreach ($params as $key => $value) {
            if (!in_array($key, $allowedParams)) {
                throw new \InvalidArgumentException("Parameter {$key} tidak valid");
            }
        }
    }

    public function extractClassLetter($className): string
    {
        preg_match('/[A-Z]+$/i', trim($className), $matches);
        return $matches[0] ?? '';
    }

    public function toRoman($number): string
    {
        $map = [
            'M'  => 1000,
            'CM' => 900,
            'D'  => 500,
            'CD' => 400,
            'C'  => 100,
            'XC' => 90,
            'L'  => 50,
            'XL' => 40,
            'X'  => 10,
            'IX' => 9,
            'V'  => 5,
            'IV' => 4,
            'I'  => 1,
        ];

        $returnValue = '';
        while ($number > 0) {
            foreach ($map as $roman => $int) {
                if ($number >= $int) {
                    $number -= $int;
                    $returnValue .= $roman;
                    break;
                }
            }
        }

        return $returnValue;
    }
}