<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use App\Models\User;

class MigrateLmsData extends Command
{
    protected $signature = 'lms:migrate-data';
    protected $description = 'Migrasi komprehensif: Master Data -> Users -> Sinkronisasi Jabatan -> Bank Soal -> History Test';

    public function handle()
    {
        $this->info('Memulai pemindahan data dari CI3 Lama ke Laravel 13 V2...');

        // 1. Eksekusi Master Data Terlebih Dahulu
        $this->migrateDepartments();
        $this->migratePositions();
        $this->migrateDepartmentPositions();

        // 2. Eksekusi Data User
        $this->migrateStaffToUsers();
        $this->migrateStudentsToUsers();

        // 3. Sinkronisasi Departemen & Posisi ke User
        $this->syncUserDepartmentAndPosition();

        // 4. Eksekusi Ujian & Hasil
        $this->migrateQuestions();
        $this->migrateExamHistory();

        $this->info('Sukses! Semua data Master, Karyawan, Sinkronisasi Jabatan, Bank Soal, dan Histori Test berhasil dipindahkan.');
    }

    /**
     * TAHAP 1A: Memindahkan data `sections` (Lama) ke `departments` (Baru)
     */
    /**
     * TAHAP 1A: Memindahkan data `sections` (Lama) ke `departments` (Baru)
     */
    private function migrateDepartments()
    {
        $this->warn('1A. Menarik data Departemen (Sections)...');
        
        $oldSections = DB::table('lmsv2-old.sections')->get();
        $bar = $this->output->createProgressBar(count($oldSections));
        $bar->start();

        foreach ($oldSections as $section) {
            // Generate kode otomatis untuk Departments karena kolom 'code' WAJIB ada
            $code = 'DPT-' . str_pad($section->id, 3, '0', STR_PAD_LEFT);

            DB::table('lmsv2.departments')->updateOrInsert(
                ['id' => $section->id],
                [
                    'code' => $code, // Tabel ini punya kolom 'code'
                    'name' => trim($section->section), 
                    'created_at' => $section->created_at ?? now(),
                    'updated_at' => now(),
                ]
            );
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 1B: Memindahkan data `classes` (Lama) ke `positions` (Baru)
     */
    private function migratePositions()
    {
        $this->warn('1B. Menarik data Posisi/Jabatan (Classes)...');
        
        $oldClasses = DB::table('lmsv2-old.classes')->get();
        $bar = $this->output->createProgressBar(count($oldClasses));
        $bar->start();

        foreach ($oldClasses as $class) {
            DB::table('lmsv2.positions')->updateOrInsert(
                ['id' => $class->id], 
                [
                    // Tabel ini HANYA punya id, name, created_at, updated_at
                    // (Pastikan Anda sudah menjalankan Langkah 1 untuk menambah kolom 'name')
                    'name' => trim($class->class),
                    'created_at' => $class->created_at ?? now(),
                    'updated_at' => now(),
                ]
            );
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 2A: Memindahkan data `staff` (Trainer/Admin) ke tabel `users`
     */
    private function migrateStaffToUsers()
    {
        $this->warn('2A. Menarik data Staff (Trainer/Admin)...');
        $oldStaffs = DB::connection('mysql_old')->table('staff')->get();
        $bar = $this->output->createProgressBar(count($oldStaffs));
        $bar->start();

        foreach ($oldStaffs as $staff) {
            $email = !empty($staff->email) ? $staff->email : $staff->employee_id . '@tunggal-pharma.com';
            
            $gender = null;
            if (strtolower($staff->gender) == 'male') $gender = 'L';
            if (strtolower($staff->gender) == 'female') $gender = 'P';

            User::updateOrCreate(
                ['email' => $email],
                [
                    'nik' => $staff->employee_id,
                    'first_name' => trim($staff->name),
                    'last_name' => trim($staff->surname),
                    'gender' => $gender,
                    'phone' => $staff->contact_no,
                    'password' => Hash::make('Tunggal123!'),
                    'role' => 'trainer',
                    'old_id' => $staff->id, 
                    'old_password_hash' => $staff->password,
                ]
            );
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 2B: Memindahkan data `students` (Karyawan) ke tabel `users`
     */
    private function migrateStudentsToUsers()
    {
        $this->warn('2B. Menarik data Karyawan (Students)...');
        $oldStudents = DB::connection('mysql_old')->table('students')->get();
        $bar = $this->output->createProgressBar(count($oldStudents));
        $bar->start();

        foreach ($oldStudents as $student) {
            $email = !empty($student->email) ? $student->email : $student->admission_no . '@tunggal-pharma.com';
            
            $gender = null;
            if (strtolower($student->gender) == 'male') $gender = 'L';
            if (strtolower($student->gender) == 'female') $gender = 'P';

            User::updateOrCreate(
                ['email' => $email],
                [
                    'nik' => $student->admission_no,
                    'first_name' => trim($student->firstname),
                    'last_name' => trim($student->lastname),
                    'gender' => $gender,
                    'phone' => $student->mobileno,
                    'date_of_birth' => $student->dob,
                    'password' => Hash::make('Karyawan123!'),
                    'role' => 'karyawan',
                    'old_id' => $student->id, 
                ]
            );
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 3: MENGHUBUNGKAN USER DENGAN DEPARTEMEN & POSISI
     */
    private function syncUserDepartmentAndPosition()
    {
        $this->warn('3. Menyinkronkan Karyawan dengan Departemen & Posisi...');
        
        // Membaca relasi dari tabel student_session di DB lama
        $oldSessions = DB::connection('mysql_old')->table('student_session')->get();
        $bar = $this->output->createProgressBar(count($oldSessions));
        $bar->start();

        foreach ($oldSessions as $session) {
            // Cari user di database baru berdasarkan old_id
            $user = User::where('old_id', $session->student_id)
                        ->where('role', 'karyawan')
                        ->first();

            if ($user) {
                // Update jabatan dan departemen
                // Asumsi: ID Departemen dan Posisi sama dengan ID Sections dan Classes dari DB Lama
                $user->update([
                    'position_id' => $session->class_id,
                    'department_id' => $session->section_id,
                ]);
            }
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 4A: Memindahkan data Bank Soal
     */
    private function migrateQuestions()
    {
        $this->warn('4A. Menarik data Bank Soal...');
        $oldQuestions = DB::connection('mysql_old')->table('questions')->get();
        $bar = $this->output->createProgressBar(count($oldQuestions));
        $bar->start();

        foreach ($oldQuestions as $q) {
            DB::table('question_banks')->updateOrInsert(
                ['old_id' => $q->id],
                [
                    'question_text' => $q->question,
                    'option_a' => $q->opt_a,
                    'option_b' => $q->opt_b,
                    'option_c' => $q->opt_c,
                    'option_d' => $q->opt_d,
                    'option_e' => $q->opt_e,
                    'correct_answer' => $q->correct,
                ]
            );
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 4B: Memindahkan data Ujian & Hasil Historis Karyawan
     */
    private function migrateExamHistory()
    {
        $this->warn('4B. Menarik data Historis Nilai Ujian...');
        
        // Tarik Master Ujian
        $oldExams = DB::connection('mysql_old')->table('onlineexam')->get();
        foreach ($oldExams as $exam) {
            DB::table('exams')->updateOrInsert(
                ['old_id' => $exam->id],
                [
                    'title' => $exam->exam,
                    'duration' => $exam->duration,
                    'passing_percentage' => $exam->passing_percentage,
                ]
            );
        }

        // Tarik Hasil Test Karyawan
        $oldResults = DB::connection('mysql_old')
                        ->table('onlineexam_students')
                        ->join('student_session', 'onlineexam_students.student_session_id', '=', 'student_session.id')
                        ->join('students', 'student_session.student_id', '=', 'students.id')
                        ->select('onlineexam_students.*', 'students.id as old_student_id')
                        ->get();

        $bar = $this->output->createProgressBar(count($oldResults));
        $bar->start();

        foreach ($oldResults as $result) {
            $user = DB::table('users')->where('old_id', $result->old_student_id)->where('role', 'karyawan')->first();
            $exam = DB::table('exams')->where('old_id', $result->onlineexam_id)->first();

            if ($user && $exam) {
                DB::table('exam_results')->updateOrInsert(
                    [
                        'user_id' => $user->id, 
                        'exam_id' => $exam->id
                    ],
                    [
                        'is_attempted' => $result->is_attempted,
                        'created_at' => $result->created_at,
                    ]
                );
            }
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }

    /**
     * TAHAP 1C: Memindahkan pemetaan class_sections (Lama) ke department_position (Baru)
     */
    private function migrateDepartmentPositions()
    {
        $this->warn('1C. Menarik data Relasi Departemen & Posisi (Class Sections)...');
        
        $oldRelations = \Illuminate\Support\Facades\DB::table('lmsv2-old.class_sections')->get();
        $bar = $this->output->createProgressBar(count($oldRelations));
        $bar->start();

        foreach ($oldRelations as $relation) {
            // Asumsi kolom lama bernama section_id dan class_id
            \Illuminate\Support\Facades\DB::table('lmsv2.department_position')->updateOrInsert(
                [
                    'department_id' => $relation->section_id,
                    'position_id'   => $relation->class_id,
                ]
            );
            $bar->advance();
        }
        $bar->finish();
        $this->newLine();
    }
}