<?php

namespace Tests\App\Services;

use App\Services\AcademicStatisticsService;
use CodeIgniter\Test\CIUnitTestCase;

class AcademicStatisticsServiceTest extends CIUnitTestCase
{
    public function testSummarizesUniqueStudentsScoresAndClasses(): void
    {
        $stats = AcademicStatisticsService::summarize([
            ['student_id' => 1, 'class_section_id' => 10, 'class_section_name' => '1-A', 'gender' => 'Male', 'fall_score' => 80, 'spring_score' => 100],
            ['student_id' => 2, 'class_section_id' => 10, 'class_section_name' => '1-A', 'gender' => 'female', 'fall_score' => 55, 'spring_score' => null],
            ['student_id' => 3, 'class_section_id' => 20, 'class_section_name' => '2-A', 'gender' => 'girl', 'fall_score' => null, 'spring_score' => null],
        ], '2025-2026');

        $this->assertSame(3, $stats['totalStudents']);
        $this->assertSame(2, $stats['totalClasses']);
        $this->assertSame(2, $stats['scoredStudents']);
        $this->assertSame(72.5, $stats['averageScore']);
        $this->assertSame(50.0, $stats['passRate']);
        $this->assertSame(1, $stats['topPerformers']);
        $this->assertSame(['Pass' => 1, 'Fail' => 1, 'Awaiting results' => 1], $stats['results']);
        $this->assertSame(['Male' => 1, 'Female' => 2], $stats['gender']);
        $this->assertSame([
            'labels' => ['1-A', '2-A'],
            'values' => [2, 1],
            'male' => [1, 0],
            'female' => [1, 1],
        ], $stats['classSizes']);
        $this->assertSame([
            'Passed' => ['Male' => 1, 'Female' => 0],
            'Failed' => ['Male' => 0, 'Female' => 1],
            'Top performers' => ['Male' => 1, 'Female' => 0],
            'Trophy winners' => ['Male' => 1, 'Female' => 1],
        ], $stats['genderByStat']);
        $this->assertSame(2, $stats['trophyWinners']);
        $this->assertSame(['Male' => 1, 'Female' => 1], $stats['trophyGender']);
    }

    public function testAveragesMultipleClassScoresOncePerStudent(): void
    {
        $stats = AcademicStatisticsService::summarize([
            ['student_id' => 9, 'class_section_id' => 1, 'class_section_name' => 'Quran', 'gender' => 'M', 'fall_score' => 100, 'spring_score' => 100],
            ['student_id' => 9, 'class_section_id' => 2, 'class_section_name' => 'Arabic', 'gender' => 'M', 'fall_score' => 80, 'spring_score' => 80],
        ]);

        $this->assertSame(1, $stats['totalStudents']);
        $this->assertSame(2, $stats['totalClasses']);
        $this->assertSame(90.0, $stats['averageScore']);
        $this->assertSame(1, $stats['topPerformers']);
    }

    public function testKgStudentsPassWithoutSemesterScores(): void
    {
        $stats = AcademicStatisticsService::summarize([
            ['student_id' => 21, 'class_section_id' => 3, 'class_section_name' => 'KG-A', 'gender' => 'Male', 'fall_score' => null, 'spring_score' => null],
            ['student_id' => 22, 'class_section_id' => 4, 'class_section_name' => '1-A', 'gender' => 'Female', 'fall_score' => null, 'spring_score' => null],
        ]);

        $this->assertSame(['Pass' => 1, 'Fail' => 0, 'Awaiting results' => 1], $stats['results']);
        $this->assertSame(100.0, $stats['passRate']);
        $this->assertSame(1, $stats['scoreBands']['KG – Passed']);
        $this->assertSame(['Male' => 1, 'Female' => 0], $stats['genderByStat']['Passed']);
    }

    public function testTrophyWinnersUseClassThresholdAndAreDistributedByGender(): void
    {
        $stats = AcademicStatisticsService::summarize([
            ['student_id' => 31, 'class_section_id' => 8, 'class_section_name' => '4-A', 'gender' => 'Male', 'fall_score' => 100, 'spring_score' => 100],
            ['student_id' => 32, 'class_section_id' => 8, 'class_section_name' => '4-A', 'gender' => 'Female', 'fall_score' => 90, 'spring_score' => 90],
            ['student_id' => 33, 'class_section_id' => 8, 'class_section_name' => '4-A', 'gender' => 'boy', 'fall_score' => 80, 'spring_score' => 80],
            ['student_id' => 34, 'class_section_id' => 8, 'class_section_name' => '4-A', 'gender' => 'girl', 'fall_score' => 70, 'spring_score' => 70],
        ]);

        $this->assertSame(3, $stats['trophyWinners']);
        $this->assertSame(['Male' => 2, 'Female' => 1], $stats['trophyGender']);
        $this->assertSame(['Male' => 2, 'Female' => 1], $stats['genderByStat']['Trophy winners']);
    }
}