<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;
use Illuminate\Support\Collection;
use App\Models\courses;
use App\Models\Module;
use App\Models\StudentDetail;
use App\Models\CourseAssignStudent;
 

class MyCoursesController extends Controller
{
    public function showMyCourses()
{
    $userId = session('student_portal_log_id') 
            ?? session('student_id') 
            ?? session('id') 
            ?? Auth::id();

    $student = DB::table('student_details')
        ->where('student_portal_log_id', $userId)
        ->orWhere('id', $userId)
        ->orWhere('student_id', $userId)
        ->first();

    if (!$student) {
        return view('mycourse', [
            'courses' => collect([]),
            'student' => null
        ]);
    }

    // DB::table භාවිතයෙන් SQL join එක නිවැරදිව සිදු කිරීම
    $courses = DB::table('courses')
        ->join('course_assign_student', 'courses.id', '=', 'course_assign_student.course_id')
        ->leftJoin('modules', 'courses.id', '=', 'modules.course_id') // <-- මේ පේළිය එකතු කරන ලදී
        ->whereIn('course_assign_student.student_id', array_filter([
            $student->id ?? null, 
            $student->student_id ?? null, 
            $student->student_portal_log_id ?? null
        ]))
        ->select(
            'courses.id as course_id',
            'courses.title as course_title',
            'courses.course_code',
            'modules.id as module_id',
            'modules.title as module_title',
            'modules.description as module_description',
            'modules.semester'
        )
        ->get()
        ->groupBy('course_id');  

    return view('mycourse', compact('courses', 'student'));
}

    //   public function showModule($course_id)
    //     {
    //         $course = DB::table('courses')->where('id', $course_id)->first();

    //         if (!$course) {
    //             abort(404, 'Course not found');
    //         }

    //         $modules = DB::table('modules')
    //             ->where('course_id', $course_id)
    //             ->get();

    //         return view('module', compact('course', 'modules'));
    //     }
        
}