<?php

namespace App\Controllers;

use App\Core\Request;
use App\Core\Response;
use App\Core\Database;

class GuardianController
{
    /**
     * Get Dashboard Data for Guardian
     * GET /api/guardian/dashboard
     */
    public function getDashboard(Request $request, Response $response): void
    {
        $guardianId = $request->user_id;

        // Fetch children linked to this guardian
        $children = Database::select(
            "SELECT s.id, s.uuid, s.full_name, s.national_id, s.grade_level, s.stream
             FROM students s
             JOIN guardian_students gs ON gs.student_id = s.id
             WHERE gs.guardian_id = ?",
            [$guardianId]
        );

        $dashboardData = [];

        foreach ($children as $child) {
            $studentId = $child['id'];

            // 1. Mastery Analytics (Readiness)
            $mastery = Database::selectOne(
                "SELECT tawjihi_readiness_score, exams_passed_count, exams_total_count 
                 FROM student_mastery_analytics 
                 WHERE student_id = ? 
                 ORDER BY updated_at DESC LIMIT 1",
                [$studentId]
            );

            // 2. Socratic checkpoints count (in_video_checkpoint passed)
            $checkpointsCount = Database::selectOne(
                "SELECT COUNT(*) as cnt 
                 FROM exam_attempts ea 
                 JOIN exams e ON e.id = ea.exam_id 
                 WHERE ea.student_id = ? AND e.scope = 'in_video_checkpoint' AND ea.status = 'passed'",
                [$studentId]
            )['cnt'] ?? 0;

            // 3. Remediation count (weaknesses fixed)
            $remediationCount = Database::selectOne(
                "SELECT COUNT(DISTINCT ea.exam_id) as cnt 
                 FROM exam_attempts ea
                 WHERE ea.student_id = ? AND ea.status = 'needs_remediation'",
                [$studentId]
            )['cnt'] ?? 0;

            // 4. Forensic Weakness Log (Recent exam attempts with AI diagnostic)
            $diagnosticLogs = Database::select(
                "SELECT ea.percentage, ea.status, ea.weak_topics_json, ea.ai_diagnostic_report, ea.completed_at, e.title as exam_title, e.scope
                 FROM exam_attempts ea
                 JOIN exams e ON e.id = ea.exam_id
                 WHERE ea.student_id = ?
                 ORDER BY ea.id DESC LIMIT 5",
                [$studentId]
            );

            // Process weak topics JSON
            foreach ($diagnosticLogs as &$log) {
                if (!empty($log['weak_topics_json'])) {
                    $log['weak_topics'] = json_decode($log['weak_topics_json'], true) ?: [];
                } else {
                    $log['weak_topics'] = [];
                }
                unset($log['weak_topics_json']);
            }

            $dashboardData[] = [
                'student' => [
                    'id' => $child['id'],
                    'uuid' => $child['uuid'],
                    'name' => $child['full_name'] ?: 'طالب جديد',
                    'national_id' => $child['national_id'] ?: 'غير محدد',
                    'grade_stream' => ($child['grade_level'] ?? 'غير محدد') . ' (' . ($child['stream'] ?? 'عام') . ')'
                ],
                'metrics' => [
                    'readiness_score' => $mastery ? $mastery['tawjihi_readiness_score'] : 0,
                    'checkpoints_passed' => $checkpointsCount,
                    'remediations_flagged' => $remediationCount
                ],
                'diagnostics' => $diagnosticLogs
            ];
        }

        $response->json([
            'status' => 'success',
            'data'   => [
                'children' => $dashboardData
            ]
        ]);
    }
}