<?php

namespace App\Livewire;

use App\Services\LearningAnalyticsService;
use App\Models\User;
use Illuminate\Support\Facades\DB;
use Livewire\Component;

class StudentAnalytics extends Component
{
    public User $student;
    public string $studentId;
    public array $masteryData = [];
    public array $analysis = [];
    public bool $loading = false;
    public string $error = '';

    protected LearningAnalyticsService $laService;

    public function mount($studentId)
    {
        $this->studentId = $studentId;
        $this->laService = new LearningAnalyticsService();
        $this->loadStudentData();
    }

    public function loadStudentData()
    {
        $this->loading = true;
        $this->error = '';

        try {
            // 获取学生基本信息
            $this->student = User::where('user_id', $this->studentId)->firstOrFail();

            // 从 MySQL 获取练习历史
            $exercises = DB::connection('remote_mysql')
                ->table('student_exercises')
                ->where('student_id', $this->studentId)
                ->orderBy('created_at', 'desc')
                ->limit(50)
                ->get()
                ->toArray();

            // 从 LearningAnalytics 获取掌握度数据
            $this->masteryData = $this->laService->getStudentMastery($this->studentId) ?: [];

            // 从 LearningAnalytics 获取学习分析
            $this->analysis = $this->laService->getStudentAnalysis($this->studentId);

            // 合并数据
            $this->analysis['exercises'] = $exercises;
            $this->analysis['exercises_count'] = count($exercises);

        } catch (\Exception $e) {
            $this->error = '加载学生数据失败: ' . $e->getMessage();
            \Log::error('StudentAnalytics load error', [
                'student_id' => $this->studentId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);
        } finally {
            $this->loading = false;
        }
    }

    public function render()
    {
        return view('livewire.student-analytics', [
            'masteryPoints' => $this->masteryData['data'] ?? [],
            'totalKnowledgePoints' => count($this->masteryData['data'] ?? []),
            'student' => $this->student,
        ]);
    }
}