<?php

namespace App\Models;

use App\Models\BaseModel;

class StudentClass extends BaseModel
{
    protected $table = 'student_class';
    protected $primaryKey = 'id';
    protected $fillable = [
        'student_id',
        'class_section_id',
        'is_event_only',
        'semester',
        'school_year',
        'description',
        'created_at',
        'updated_at',
        'updated_by',
    ];
    public $timestamps = true;
    const CREATED_AT = 'created_at';
    const UPDATED_AT = 'updated_at';

    public function getClassSectionNameByStudentId(int $studentId): ?string
    {
        return $this->db->table($this->table)
            ->select('cs.class_section_name')
            ->join('class_sections as cs', 'cs.class_section_id', '=', 'student_class.class_section_id')
            ->where('student_class.student_id', $studentId)
            ->get()
            ->getRow('class_section_name');
    }


    // Custom findAll() method
    public function findAll($limit = 0, $offset = 0)
    {
        // Optional: Add custom logic before fetching all records
        // For example, you can add default conditions:
        // $this->where('semester', 'Fall');

        // Then call the parent findAll method to fetch the records
        return parent::findAll($limit, $offset);
    }

    // Method to get all students in a specific class section
    public function getClassStudents($classSectionId)
    {
        return $this->where('class_section_id', $classSectionId)->findAll();
    }

    public function getClassSectionsByStudentId($studentId, string $schoolYear)
    {
        // Build the query
        $builder = $this->db->table('student_class')
            ->select('cs.class_section_name')
            ->join('class_sections as cs', 'student_class.class_section_id', '=', 'cs.class_section_id')
            ->where('student_class.student_id', $studentId) // Filter by student ID
            ->where('student_class.class_section_id IS NOT NULL') // Ensure class_section_id is not null
            ->where('student_class.school_year', $schoolYear); // Filter by school year

        // Fetch the result
        $result = $builder->get()->getRowArray();

        // Check if the result is not null before accessing the 'class_section_name'
        if ($result && isset($result['class_section_name'])) {
            return $result['class_section_name']; // Return the class_section_name
        } else {
            return ''; // Return an empty string if no class section is found
        }
    }


    public function getStudentsByClassSectionIds(array $classSectionIds)
    {
        return $this->select('students.id as student_id, students.firstname, students.lastname, students.school_id, students.is_new,students.photo_consent ,students.age, student_class.semester, student_class.school_year, student_class.class_section_id')
            ->join('students', 'students.id', '=', 'student_class.student_id')
            ->whereIn('student_class.class_section_id', $classSectionIds)
            ->get()
            ->getResultArray();
    }

    /**
     * Get the class ID (grade) for a specific student.
     *
     * @param int $studentId
     * @return string class_id or 'N/A'
     */
    public function getStudentGrade(int $studentId): string
    {
        $studentClass = $this->where('student_id', $studentId)
            ->orderBy('created_at', 'DESC') // in case of multiple entries, get latest
            ->first();

        if ($studentClass && isset($studentClass['class_section_id'])) {
            $classSection = $this->db->table('class_sections')
                ->where('class_section_id', $studentClass['class_section_id'])
                ->get()
                ->getRowArray();

            return $classSection['class_id'] ?? 'N/A';
        }

        log_message('error', "Student class or section not found for student ID: $studentId");
        return 'N/A';
    }
}