<?php

namespace App\Filament\Pages;

use App\Services\LearningAnalyticsService;
use BackedEnum;
use Filament\Pages\Page;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Str;
use UnitEnum;
use Livewire\Attributes\Layout;
use Livewire\Attributes\Title;

class SimulatedGrading extends Page
{
    use \Filament\Pages\Concerns\InteractsWithFormActions;

    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-document-check';

    protected static string|UnitEnum|null $navigationGroup = '卷子生成管理';

    protected static ?string $navigationLabel = '专题测试';

    protected static ?int $navigationSort = 5;

    protected ?string $heading = '专题测试';

    protected string $view = 'filament.pages.simulated-grading';

    public string $studentId = '';
    public string $teacherId = '';
    public array $teachers = [];
    public array $students = [];

    // 模拟判卷相关
    public array $exerciseQuestions = [];
    public array $exerciseAnswers = [];
    public ?string $selectedKnowledgePoint = null;
    public array $availableKnowledgePoints = [];
    public array $availableSkills = [];
    public array $selectedSkills = [];
    public string $currentBatchId = '';
    public int $questionsPerSet = 5;
    protected array $knowledgePointCodeIndex = [];
    protected array $knowledgePointIdIndex = [];
    public bool $isLoading = false;

    // 测试相关
    public int $testClickCount = 0;

    // 答题历史相关
    public array $exerciseHistory = [];
    public int $historyCurrentPage = 1;
    public int $historyPerPage = 10;
    public int $historyTotal = 0;
    public int $historyTotalPages = 0;

    public function mount(Request $request): void
    {
        // 加载老师列表
        $this->loadTeachers();

        // 从请求中获取老师ID或使用默认值
        $this->teacherId = $request->input('teacher_id', $this->getDefaultTeacherId());

        // 根据老师ID加载学生列表
        $this->loadStudentsByTeacher();

        // 从请求中获取学生ID或使用默认值
        $this->studentId = $request->input('student_id', $this->getDefaultStudentId());

        // 初始化知识点和技能数据
        $this->loadKnowledgePointsAndSkills();

        // 加载默认学生的答题历史
        if (!empty($this->studentId)) {
            $this->loadExerciseHistory();
        }
    }

    /**
     * 获取默认老师ID（列表中的第一个老师）
     */
    private function getDefaultTeacherId(): string
    {
        return !empty($this->teachers) ? $this->teachers[0]->teacher_id : '';
    }

    /**
     * 获取默认学生ID（列表中的第一个学生）
     */
    private function getDefaultStudentId(): string
    {
        return !empty($this->students) ? $this->students[0]->student_id : '';
    }

    /**
     * 从MySQL加载老师列表
     */
    public function loadTeachers(): void
    {
        try {
            // 首先获取teachers表中的老师
            $this->teachers = DB::connection('remote_mysql')
                ->table('teachers as t')
                ->leftJoin('users as u', 't.teacher_id', '=', 'u.user_id')
                ->select(
                    't.teacher_id',
                    't.name',
                    't.subject',
                    'u.username',
                    'u.email'
                )
                ->orderBy('t.name')
                ->get()
                ->toArray();

            // 如果有学生但没有对应的老师记录，添加一个"未知老师"条目
            $teacherIds = array_column($this->teachers, 'teacher_id');
            $missingTeacherIds = DB::connection('remote_mysql')
                ->table('students as s')
                ->distinct()
                ->whereNotIn('s.teacher_id', $teacherIds)
                ->pluck('teacher_id')
                ->toArray();

            if (!empty($missingTeacherIds)) {
                foreach ($missingTeacherIds as $missingId) {
                    $this->teachers[] = (object) [
                        'teacher_id' => $missingId,
                        'name' => '未知老师 (' . $missingId . ')',
                        'subject' => '未知',
                        'username' => null,
                        'email' => null
                    ];
                }

                // 重新排序
                usort($this->teachers, function($a, $b) {
                    return strcmp($a->name, $b->name);
                });
            }
        } catch (\Exception $e) {
            Log::error('加载老师列表失败', [
                'error' => $e->getMessage()
            ]);
            $this->teachers = [];
        }
    }

    /**
     * 根据老师ID加载学生列表
     */
    public function loadStudentsByTeacher(): void
    {
        try {
            if (empty($this->teacherId)) {
                $this->students = [];
                return;
            }

            $this->students = DB::connection('remote_mysql')
                ->table('students as s')
                ->leftJoin('users as u', 's.student_id', '=', 'u.user_id')
                ->where('s.teacher_id', $this->teacherId)
                ->select(
                    's.student_id',
                    's.name',
                    's.grade',
                    's.class_name',
                    'u.username',
                    'u.email'
                )
                ->orderBy('s.name')
                ->get()
                ->toArray();
        } catch (\Exception $e) {
            Log::error('加载学生列表失败', [
                'teacher_id' => $this->teacherId,
                'error' => $e->getMessage()
            ]);
            $this->students = [];
        }
    }

    /**
     * 老师改变时重新加载学生列表
     */
    public function updatedTeacherId(): void
    {
        $this->loadStudentsByTeacher();
        // 清空之前选中的学生ID
        $this->studentId = '';
        // 自动加载第一个学生的数据
        $this->studentId = $this->getDefaultStudentId();

        // 加载该学生的答题历史
        if (!empty($this->studentId)) {
            $this->loadExerciseHistory();
        }
    }

    /**
     * 学生ID更新后的处理
     */
    public function updatedStudentId(): void
    {
        // 清空之前的答题数据
        $this->exerciseQuestions = [];
        $this->exerciseAnswers = [];
        $this->currentBatchId = '';

        // 重新加载该学生的答题历史
        if (!empty($this->studentId)) {
            $this->loadExerciseHistory();
        }
    }

    /**
     * 加载学生答题历史
     */
    public function loadExerciseHistory(): void
    {
        if (empty($this->studentId)) {
            $this->exerciseHistory = [];
            $this->historyTotal = 0;
            $this->historyTotalPages = 0;
            return;
        }

        try {
            // 使用Eloquent ORM查询
            $query = \App\Models\StudentExercise::where('student_id', $this->studentId)
                ->orderBy('created_at', 'desc');

            // 获取总数
            $this->historyTotal = $query->count();

            // 计算总页数
            $this->historyTotalPages = ceil($this->historyTotal / $this->historyPerPage);

            // 获取分页数据并处理数学公式
            $exercises = $query->skip(($this->historyCurrentPage - 1) * $this->historyPerPage)
                ->take($this->historyPerPage)
                ->get();

            // 使用模型的方法处理数学公式
            $this->exerciseHistory = $exercises->map(function ($exercise) {
                return $exercise->toProcessedArray();
            })->toArray();

            // 渲染历史记录中的数学符号
            $this->dispatch('math:render');

            Log::info('成功加载答题历史', [
                'student_id' => $this->studentId,
                'total' => $this->historyTotal,
                'current_page' => $this->historyCurrentPage,
                'per_page' => $this->historyPerPage
            ]);

        } catch (\Exception $e) {
            Log::error('加载答题历史失败', [
                'student_id' => $this->studentId,
                'error' => $e->getMessage()
            ]);
            $this->exerciseHistory = [];
            $this->historyTotal = 0;
            $this->historyTotalPages = 0;
        }
    }

    /**
     * 跳转到指定历史页面
     */
    public function gotoHistoryPage(int $page): void
    {
        if ($page >= 1 && $page <= $this->historyTotalPages) {
            $this->historyCurrentPage = $page;
            $this->loadExerciseHistory();
        }
    }

    /**
     * 上一页
     */
    public function previousHistoryPage(): void
    {
        if ($this->historyCurrentPage > 1) {
            $this->historyCurrentPage--;
            $this->loadExerciseHistory();
        }
    }

    /**
     * 下一页
     */
    public function nextHistoryPage(): void
    {
        if ($this->historyCurrentPage < $this->historyTotalPages) {
            $this->historyCurrentPage++;
            $this->loadExerciseHistory();
        }
    }

    /**
     * 每页显示数量变化
     */
    public function updatedHistoryPerPage(): void
    {
        $this->historyCurrentPage = 1;
        $this->loadExerciseHistory();
    }

    /**
     * 获取历史页面列表（用于分页导航）
     */
    public function getHistoryPages(): array
    {
        $pages = [];
        $totalPages = $this->historyTotalPages;
        $currentPage = $this->historyCurrentPage;
        $start = max(1, $currentPage - 2);
        $end = min($totalPages, $currentPage + 2);

        for ($i = $start; $i <= $end; $i++) {
            $pages[] = $i;
        }

        return $pages;
    }

    /**
     * 加载知识点和技能数据
     */
    public function loadKnowledgePointsAndSkills(): void
    {
        try {
            $knowledgeApiBase = config('services.knowledge_api.base_url', env('KNOWLEDGE_API_BASE', 'http://localhost:5011'));

            // 从知识图谱API获取知识点数据
            $kpResponse = Http::timeout(10)
                ->get($knowledgeApiBase . '/knowledge-points/', [
                    'page' => 1,
                    'per_page' => 100
                ]);

            if ($kpResponse->successful()) {
                $kpData = $kpResponse->json();
                $this->availableKnowledgePoints = $kpData['data'] ?? $kpData ?? [];

                // 格式化知识点数据，确保包含必要的字段
                $this->availableKnowledgePoints = array_map(function($kp) {
                    return [
                        'id' => (string)($kp['id'] ?? $kp['kp_id'] ?? uniqid()),
                        'code' => $kp['kp_code'] ?? $kp['kp_id'] ?? $kp['code'] ?? 'KP_UNKNOWN',
                        'name' => $kp['cn_name'] ?? $kp['kp_name'] ?? $kp['name'] ?? $kp['kp_code'] ?? '未知知识点',
                        'subject' => $kp['category'] ?? '数学'
                    ];
                }, $this->availableKnowledgePoints);
            } else {
                throw new \Exception('知识图谱API调用失败: ' . $kpResponse->status());
            }

            // 从知识图谱API获取技能数据
            $skillResponse = Http::timeout(10)
                ->get($knowledgeApiBase . '/skills/', [
                    'page' => 1,
                    'per_page' => 50
                ]);

            if ($skillResponse->successful()) {
                $skillData = $skillResponse->json();
                $this->availableSkills = $skillData['data'] ?? $skillData ?? [];

                // 格式化技能数据
                $this->availableSkills = array_map(function($skill) {
                    return [
                        'id' => (string)($skill['id'] ?? $skill['skill_code'] ?? uniqid()),
                        'code' => $skill['skill_code'] ?? $skill['code'] ?? 'SK_UNKNOWN',
                        'name' => $skill['skill_name'] ?? $skill['name'] ?? $skill['skill_code'] ?? '未知技能',
                        'category' => $skill['skill_type'] ?? $skill['category'] ?? '基础技能'
                    ];
                }, $this->availableSkills);
            } else {
                throw new \Exception('技能API调用失败: ' . $skillResponse->status());
            }

            Log::info('成功从知识图谱API加载数据', [
                'knowledge_points_count' => count($this->availableKnowledgePoints),
                'skills_count' => count($this->availableSkills)
            ]);

        } catch (\Exception $e) {
            Log::error('从知识图谱API加载知识点和技能数据失败，使用备用数据', [
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            // 使用模拟数据作为备用
            $this->availableKnowledgePoints = [
                ['id' => 'factor_1', 'code' => 'factor_1', 'name' => '因式分解基础', 'subject' => '数学'],
                ['id' => 'factor_2', 'code' => 'factor_2', 'name' => '提取公因式', 'subject' => '数学'],
                ['id' => 'factor_3', 'code' => 'factor_3', 'name' => '平方差公式', 'subject' => '数学'],
                ['id' => 'factor_4', 'code' => 'factor_4', 'name' => '完全平方公式', 'subject' => '数学'],
                ['id' => 'factor_5', 'code' => 'factor_5', 'name' => '分组分解法', 'subject' => '数学'],
                ['id' => 'factor_6', 'code' => 'factor_6', 'name' => '立方和差公式', 'subject' => '数学'],
                ['id' => 'factor_7', 'code' => 'factor_7', 'name' => '十字相乘法', 'subject' => '数学'],
                ['id' => 'factor_8', 'code' => 'factor_8', 'name' => '综合因式分解', 'subject' => '数学'],
            ];

            $this->availableSkills = [
                ['id' => 'calculation', 'code' => 'calculation', 'name' => '计算能力', 'category' => '基础技能'],
                ['id' => 'reasoning', 'code' => 'reasoning', 'name' => '逻辑推理', 'category' => '思维技能'],
                ['id' => 'pattern_recognition', 'code' => 'pattern_recognition', 'name' => '模式识别', 'category' => '认知技能'],
                ['id' => 'algebraic_manipulation', 'code' => 'algebraic_manipulation', 'name' => '代数运算', 'category' => '专业技能'],
                ['id' => 'problem_solving', 'code' => 'problem_solving', 'name' => '解题能力', 'category' => '专业技能'],
                ['id' => 'analysis', 'code' => 'analysis', 'name' => '分析能力', 'category' => '思维技能'],
            ];
        }

        $this->buildKnowledgePointIndexes();

        Log::info('知识点和技能数据加载完成');
    }

    /**
     * 为知识点构建索引映射
     */
    private function buildKnowledgePointIndexes(): void
    {
        $this->knowledgePointCodeIndex = [];
        $this->knowledgePointIdIndex = [];

        foreach ($this->availableKnowledgePoints as $kp) {
            // 使用格式化后的字段：code 对应 kp_code
            if (!empty($kp['code'])) {
                $this->knowledgePointCodeIndex[(string) $kp['code']] = $kp;
            }
            // 使用格式化后的字段：id
            if (!empty($kp['id'])) {
                $this->knowledgePointIdIndex[(string) $kp['id']] = $kp;
            }
        }
    }

    /**
     * 知识点选择变化时更新技能列表
     */
    public function updatedSelectedKnowledgePoint(): void
    {
        // 清空已选择的技能
        $this->selectedSkills = [];

        // 如果没有选择知识点，加载所有技能
        if (empty($this->selectedKnowledgePoint)) {
            $this->loadAllSkills();
            return;
        }

        // 根据选择的知识点获取相关技能
        $this->loadSkillsForKnowledgePoint($this->selectedKnowledgePoint);
    }

    /**
     * 根据知识点加载相关技能
     */
    private function loadSkillsForKnowledgePoint(string $knowledgePointId): void
    {
        $knowledgeApiBase = config('services.knowledge_api.base_url', env('KNOWLEDGE_API_BASE', 'http://localhost:5011'));

        // 根据knowledgePointId查找对应的kp_code
        $kpCode = null;
        foreach ($this->availableKnowledgePoints as $kp) {
            if ($kp['id'] === $knowledgePointId) {
                $kpCode = $kp['code']; // 使用kp_code作为API参数
                break;
            }
        }

        if (!$kpCode) {
            Log::warning('未找到知识点对应的kp_code', ['knowledge_point_id' => $knowledgePointId]);
            $this->availableSkills = [];
            return;
        }

        Log::info('准备调用知识点详情API', [
            'kp_code' => $kpCode,
            'knowledge_point_id' => $knowledgePointId
        ]);

        // 直接从知识点详情API获取技能列表
        $kpDetailResponse = Http::timeout(10)
            ->get($knowledgeApiBase . '/knowledge-points/' . $kpCode);

        $kpData = $kpDetailResponse->json();

        // 转换技能数据格式，匹配模板期望的字段名
        $skills = $kpData['skills'] ?? [];
        $this->availableSkills = array_map(function($skill) {
            return [
                'id' => (string)($skill['id'] ?? $skill['skill_code'] ?? ''),
                'code' => $skill['skill_code'] ?? '',
                'name' => $skill['skill_name'] ?? '',
                'category' => $skill['skill_type'] ?? ''
            ];
        }, $skills);

        Log::info('设置技能列表', [
            'count' => count($this->availableSkills),
            'skills' => $this->availableSkills
        ]);
    }

    /**
     * 加载所有技能
     */
    private function loadAllSkills(): void
    {
        // 先保存当前技能列表作为兜底
        $fallbackSkills = $this->availableSkills;

        try {
            $knowledgeApiBase = config('services.knowledge_api.base_url', env('KNOWLEDGE_API_BASE', 'http://localhost:5011'));

            $skillResponse = Http::timeout(10)
                ->get($knowledgeApiBase . '/skills/', [
                    'page' => 1,
                    'per_page' => 50
                ]);

            if ($skillResponse->successful()) {
                $skillData = $skillResponse->json();
                $skills = $skillData['data'] ?? $skillData ?? [];

                // 只有当API返回有效数据时才更新技能列表
                if (!empty($skills) && is_array($skills)) {
                    $this->availableSkills = array_map(function($skill) {
                        return [
                            'id' => (string)($skill['id'] ?? $skill['skill_code'] ?? uniqid()),
                            'code' => $skill['skill_code'] ?? $skill['code'] ?? 'SK_UNKNOWN',
                            'name' => $skill['skill_name'] ?? $skill['name'] ?? $skill['skill_code'] ?? '未知技能',
                            'category' => $skill['skill_type'] ?? $skill['category'] ?? '基础技能'
                        ];
                    }, $skills);

                    Log::info('成功加载所有技能', [
                        'skills_count' => count($this->availableSkills)
                    ]);
                    return;
                }
            }

            // 如果API调用失败或返回空数据，使用默认技能列表
            Log::warning('加载所有技能失败或为空，使用默认技能列表');
            $this->useDefaultSkills();

        } catch (\Exception $e) {
            Log::error('加载所有技能失败，使用默认技能列表', ['error' => $e->getMessage()]);
            $this->useDefaultSkills();
        }
    }

    /**
     * 使用默认技能列表
     */
    private function useDefaultSkills(): void
    {
        $this->availableSkills = [
            ['id' => 'calculation', 'code' => 'calculation', 'name' => '计算能力', 'category' => '基础技能'],
            ['id' => 'reasoning', 'code' => 'reasoning', 'name' => '逻辑推理', 'category' => '思维技能'],
            ['id' => 'pattern_recognition', 'code' => 'pattern_recognition', 'name' => '模式识别', 'category' => '认知技能'],
            ['id' => 'algebraic_manipulation', 'code' => 'algebraic_manipulation', 'name' => '代数运算', 'category' => '专业技能'],
            ['id' => 'problem_solving', 'code' => 'problem_solving', 'name' => '解题能力', 'category' => '专业技能'],
            ['id' => 'analysis', 'code' => 'analysis', 'name' => '分析能力', 'category' => '思维技能'],
        ];
    }

    /**
     * 通过知识点 code 获取详情
     */
    private function findKnowledgePointByCode(?string $kpCode): ?array
    {
        if (empty($kpCode)) {
            return null;
        }

        if (isset($this->knowledgePointCodeIndex[$kpCode])) {
            return $this->knowledgePointCodeIndex[$kpCode];
        }

        $fetched = $this->fetchKnowledgePointFromApi($kpCode);
        if ($fetched) {
            $this->availableKnowledgePoints[] = $fetched;
            $this->buildKnowledgePointIndexes();
        }

        return $fetched;
    }

    /**
     * 调用知识图谱 API 获取知识点
     */
    private function fetchKnowledgePointFromApi(string $kpCode): ?array
    {
        try {
            $knowledgeApiBase = config('services.knowledge_api.base_url', env('KNOWLEDGE_API_BASE', 'http://localhost:5011'));
            $response = Http::timeout(10)->get($knowledgeApiBase . '/knowledge-points/' . $kpCode);

            if ($response->successful()) {
                $kp = $response->json();
                return [
                    'id' => (string) ($kp['id'] ?? $kp['kp_id'] ?? $kpCode),
                    'code' => $kp['kp_code'] ?? $kpCode,
                    'name' => $kp['cn_name'] ?? $kp['kp_name'] ?? $kpCode,
                    'subject' => $kp['category'] ?? '数学'
                ];
            }
        } catch (\Exception $e) {
            Log::warning('获取知识点详情失败', [
                'kp_code' => $kpCode,
                'error' => $e->getMessage()
            ]);
        }

        return null;
    }

    /**
     * 获取知识点 ID（根据 code）
     */
    private function findKnowledgePointIdByCode(?string $kpCode): ?string
    {
        $kp = $this->findKnowledgePointByCode($kpCode);
        if (!$kp || empty($kp['id'])) {
            return null;
        }

        return (string) $kp['id'];
    }

    /**
     * 生成模拟题目（备用方案）
     */
    private function generateMockQuestion(): array
    {
        // 如果用户选择了知识点，使用选中的知识点的kp_code
        if ($this->selectedKnowledgePoint) {
            $selectedKpCode = null;
            foreach ($this->availableKnowledgePoints as $kp) {
                if ($kp['id'] === $this->selectedKnowledgePoint) {
                    $selectedKpCode = $kp['code'];
                    break;
                }
            }

            // 如果找到了选中的知识点的code，使用它
            if ($selectedKpCode) {
                $mockQuestions = [
                    ['content' => '因式分解：x² - 9', 'answer' => '(x+3)(x-3)', 'difficulty' => 2],
                    ['content' => '因式分解：2x² + 5x + 2', 'answer' => '(2x+1)(x+2)', 'difficulty' => 3],
                    ['content' => '因式分解：x² + 6x + 9', 'answer' => '(x+3)²', 'difficulty' => 2],
                    ['content' => '因式分解：x² - 4x + 4', 'answer' => '(x-2)²', 'difficulty' => 2],
                    ['content' => '因式分解：3x² - 12', 'answer' => '3(x+2)(x-2)', 'difficulty' => 3],
                ];
                $question = $mockQuestions[array_rand($mockQuestions)];
                $question['type'] = '因式分解';
                $question['kp_code'] = $selectedKpCode;
                $question['knowledge_point_id'] = (string) $this->selectedKnowledgePoint;
                return $question;
            }
        }

        // 如果没有选择知识点，使用默认的
        $types = [
            ['type' => '因式分解', 'kp_code' => 'KP7001', 'content' => '因式分解：x² - 9', 'answer' => '(x+3)(x-3)', 'difficulty' => 2],
            ['type' => '因式分解', 'kp_code' => 'KP8001', 'content' => '因式分解：2x² + 5x + 2', 'answer' => '(2x+1)(x+2)', 'difficulty' => 3],
            ['type' => '因式分解', 'kp_code' => 'KP8002', 'content' => '因式分解：x² + 6x + 9', 'answer' => '(x+3)²', 'difficulty' => 2],
            ['type' => '因式分解', 'kp_code' => 'KP8003', 'content' => '因式分解：x² - 4x + 4', 'answer' => '(x-2)²', 'difficulty' => 2],
            ['type' => '因式分解', 'kp_code' => 'KP8004', 'content' => '因式分解：3x² - 12', 'answer' => '3(x+2)(x-2)', 'difficulty' => 3],
        ];

        $question = $types[array_rand($types)];
        $kpMeta = $this->getDefaultKnowledgePointMeta();

        $question['kp_code'] = $question['kp_code'] ?? 'KP_UNKNOWN';
        $question['knowledge_point_id'] = $this->findKnowledgePointIdByCode($question['kp_code']) ?? $kpMeta['id'];

        return $question;
    }

    /**
     * 获取一个默认的知识点（用于兜底数据）
     */
    private function getDefaultKnowledgePointMeta(): array
    {
        if (!empty($this->availableKnowledgePoints)) {
            $kp = $this->availableKnowledgePoints[array_rand($this->availableKnowledgePoints)];
            return [
                'id' => isset($kp['id']) ? (string) $kp['id'] : null,
                'code' => $kp['code'] ?? null
            ];
        }

        return [
            'id' => null,
            'code' => 'KP_UNKNOWN'
        ];
    }

    /**
     * 从题库API获取多道题目
     */
    private function fetchMultipleQuestionsFromBank(int $count): array
    {
        try {
            $params = [
                'limit' => $count,
                'type' => 'factorization'
            ];

            // 如果用户选择了知识点，传入kp_code
            if ($this->selectedKnowledgePoint) {
                foreach ($this->availableKnowledgePoints as $kp) {
                    if ($kp['id'] === $this->selectedKnowledgePoint) {
                        $params['kp_code'] = $kp['code'];
                        break;
                    }
                }
            }

            $data = app(\App\Services\QuestionServiceApi::class)->listQuestions(1, $count, $params);
            $questions = $data['data'] ?? [];

            $processedQuestions = [];
            foreach ($questions as $question) {
                $kpCode = $question['kp_code'] ?? null;
                $knowledgePointId = $question['knowledge_point_id'] ?? null;

                if ($this->selectedKnowledgePoint) {
                    $selectedKpCode = null;
                    foreach ($this->availableKnowledgePoints as $kp) {
                        if ($kp['id'] === $this->selectedKnowledgePoint) {
                            $selectedKpCode = $kp['code'];
                            break;
                        }
                    }
                    if ($selectedKpCode) {
                        $kpCode = $selectedKpCode;
                        $knowledgePointId = (string) $this->selectedKnowledgePoint;
                    }
                } else {
                    if ($kpCode && !$knowledgePointId) {
                        $knowledgePointId = $this->findKnowledgePointIdByCode($kpCode);
                    }

                    if (!$kpCode && $knowledgePointId) {
                        $kpCode = $this->findKnowledgePointCodeById((string) $knowledgePointId);
                    }

                    if (!$kpCode) {
                        $kpCode = $this->getDefaultKnowledgePointMeta()['code'];
                    }

                    if (!$knowledgePointId && $kpCode) {
                        $knowledgePointId = $this->findKnowledgePointIdByCode($kpCode);
                    }
                }

                $processedQuestions[] = [
                    'id' => $question['question_code'] ?? 'Q_' . time() . '_' . uniqid(),
                    'content' => $question['stem'] ?? '',
                    'answer' => $question['solution'] ?? '',
                    'type' => '因式分解',
                    'difficulty' => $question['difficulty'] ?? rand(1, 5),
                    'kp_code' => $kpCode ?? 'KP_UNKNOWN',
                    'knowledge_point_id' => $knowledgePointId,
                    'skill' => $question['skill'] ?? 'unknown'
                ];

                if (count($processedQuestions) >= $count) {
                    break;
                }
            }

            while (count($processedQuestions) < $count) {
                $mockQuestion = $this->generateMockQuestion();
                $mockQuestion['id'] = 'Q_' . time() . '_' . uniqid();
                $processedQuestions[] = $mockQuestion;
            }

            return $processedQuestions;

        } catch (\Exception $e) {
            Log::warning('题库API调用失败，使用模拟题目', ['error' => $e->getMessage()]);
            $mockQuestions = [];
            for ($i = 0; $i < $count; $i++) {
                $mockQuestion = $this->generateMockQuestion();
                $mockQuestion['id'] = 'Q_' . time() . '_' . uniqid();
                $mockQuestions[] = $mockQuestion;
            }
            return $mockQuestions;
        }
    }

    /**
     * 根据 ID 获取知识点 code
     */
    private function findKnowledgePointCodeById(?string $kpId): ?string
    {
        if (isset($this->knowledgePointIdIndex[$kpId])) {
            return $this->knowledgePointIdIndex[$kpId]['code'] ?? null;
        }
        return null;
    }

    /**
     * 生成批量题目
     */
    public function generateBatchQuestions(): void
    {
        if (empty($this->studentId)) {
            $this->dispatch('notify', message: '请先选择学生', type: 'warning');
            return;
        }

        try {
            $this->isLoading = true;

            // 生成批次ID
            $this->currentBatchId = 'BATCH_' . $this->studentId . '_' . time();

            // 一次性获取所有需要的题目，避免重复调用API
            $allQuestions = $this->fetchMultipleQuestionsFromBank($this->questionsPerSet);

            // 处理题目
            $questions = [];
            foreach ($allQuestions as $question) {
                if (empty($question['knowledge_point_id']) && !empty($question['kp_code'])) {
                    $question['knowledge_point_id'] = $this->findKnowledgePointIdByCode($question['kp_code']);
                }
                if (empty($question['knowledge_point_id']) && $this->selectedKnowledgePoint) {
                    $question['knowledge_point_id'] = (string) $this->selectedKnowledgePoint;
                }

                // 添加选择的知识点和技能信息
                $question['batch_id'] = $this->currentBatchId;
                $question['selected_knowledge_point'] = $this->selectedKnowledgePoint;
                $question['selected_skills'] = $this->selectedSkills;
                $questions[] = $question;
            }

            if (!empty($questions)) {
                $this->exerciseQuestions = $questions;

                // 初始化答题数组
                $this->exerciseAnswers = [];
                foreach ($questions as $index => $question) {
                    $this->exerciseAnswers[$index] = [
                        'user_answer' => '',
                        'is_correct' => null,
                    ];
                }

  
                $this->dispatch('notify', message: "成功生成 {$this->questionsPerSet} 道题目", type: 'success');
            } else {
                $this->dispatch('notify', message: '生成题目失败，请重试', type: 'danger');
            }

        } catch (\Exception $e) {
            Log::error('生成批量题目失败', [
                'student_id' => $this->studentId,
                'questions_count' => $this->questionsPerSet,
                'error' => $e->getMessage()
            ]);
            $this->dispatch('notify', message: '生成题目失败：' . $e->getMessage(), type: 'danger');
        } finally {
            $this->isLoading = false;
        }
    }

    /**
     * 计算技能评分
     */
    private function calculateSkillScores(array $selectedSkills, bool $isCorrect): string
    {
        if (empty($selectedSkills)) {
            return json_encode([]);
        }

        $scores = [];
        $baseScore = $isCorrect ? 0.8 : 0.2; // 正确答对给0.8分，错误给0.2分
        $randomFactor = rand(-10, 10) / 100; // 添加随机因素

        foreach ($selectedSkills as $skillId) {
            $score = max(0, min(1, $baseScore + $randomFactor));
            $scores[$skillId] = round($score, 3);
        }

        return json_encode($scores);
    }

    /**
     * 批量答题时更新掌握度
     */
    private function updateMasteryFromBatchAnswer(array $question, bool $isCorrect): void
    {
        try {
            $learningAnalytics = app(LearningAnalyticsService::class);
            $kpCode = $question['kp_code'] ?? $this->findKnowledgePointCodeById($question['knowledge_point_id'] ?? null);

            $attemptData = [
                'kp_code' => $kpCode ?? 'KP_UNKNOWN',
                'is_correct' => $isCorrect,
                'time_spent_seconds' => rand(60, 180),
                'difficulty_level' => (string)($question['difficulty'] ?? '3'),
                'question_id' => 'Q_' . $this->currentBatchId . '_' . rand(1000, 9999),
                'student_answer' => '',
                'correct_answer' => $question['answer'] ?? '',
            ];

            if (!empty($question['knowledge_point_id'])) {
                $attemptData['knowledge_point_id'] = $question['knowledge_point_id'];
            }

            // 添加技能点数据（使用技能ID，ID是唯一的）
            if (!empty($question['selected_skills'])) {
                $attemptData['skill_codes'] = $question['selected_skills'];
            } elseif (!empty($this->selectedSkills)) {
                $attemptData['skill_codes'] = $this->selectedSkills;
            } else {
                $attemptData['skill_codes'] = [];
            }

            $result = $learningAnalytics->submitAttempt($this->studentId, $attemptData);

            if (isset($result['error'])) {
                Log::error('LearningAnalytics API 调用失败', [
                    'student_id' => $this->studentId,
                    'batch_id' => $this->currentBatchId,
                    'error' => $result['message'] ?? 'Unknown error',
                    'attempt_data' => $attemptData
                ]);
            } else {
                Log::info('批量答题记录已成功提交', [
                    'student_id' => $this->studentId,
                    'batch_id' => $this->currentBatchId,
                    'attempt_id' => $result['attempt_id'] ?? null,
                    'knowledge_point_id' => $result['knowledge_point_id'] ?? null,
                    'skill_codes' => $result['skill_codes'] ?? []
                ]);
            }

        } catch (\Exception $e) {
            Log::error('更新批量答题掌握度失败', [
                'student_id' => $this->studentId,
                'batch_id' => $this->currentBatchId,
                'error' => $e->getMessage()
            ]);
        }
    }

    /**
     * 批量提交答案
     */
    public function submitBatchAnswers(): void
    {
        if (empty($this->studentId) || empty($this->exerciseQuestions) || empty($this->currentBatchId)) {
            $this->dispatch('notify', message: '没有可提交的题目', type: 'warning');
            return;
        }

        try {
            $this->isLoading = true;

            $successCount = 0;
            $failureCount = 0;

            foreach ($this->exerciseQuestions as $index => $question) {
                $answer = $this->exerciseAnswers[$index] ?? null;

                if (!$answer || $answer['is_correct'] === null) {
                    continue; // 跳过未答题的题目
                }

                try {
                    // 确保knowledge_point_id始终是数字ID
                    $knowledgePointId = $question['knowledge_point_id'] ?? null;

                    // 如果knowledge_point_id是code，转换为ID
                    if ($knowledgePointId && !is_numeric($knowledgePointId)) {
                        $knowledgePointId = $this->findKnowledgePointIdByCode($knowledgePointId);
                    }

                    // 如果还是没有，使用选中的知识点
                    if (!$knowledgePointId && $this->selectedKnowledgePoint) {
                        $selectedValue = $this->selectedKnowledgePoint;
                        // 如果选中的是code，转换为ID；如果是ID，直接使用
                        if (!is_numeric($selectedValue)) {
                            $knowledgePointId = $this->findKnowledgePointIdByCode($selectedValue);
                        } else {
                            $knowledgePointId = (string)$selectedValue;
                        }
                    }

                    // 如果还是没有，从题目kp_code查找
                    if (!$knowledgePointId && !empty($question['kp_code'])) {
                        $knowledgePointId = $this->findKnowledgePointIdByCode($question['kp_code']);
                    }

                    $kpCode = $question['kp_code'] ?? $this->findKnowledgePointCodeById($knowledgePointId) ?? 'KP_UNKNOWN';

                    // 准备数据库存储数据
                    $exerciseData = [
                        'student_id' => $this->studentId,
                        'question_id' => $question['id'] ?? 'Q_' . $this->currentBatchId . '_' . $index,
                        // 确保knowledge_point_id是整数或null，不能是字符串
                        'knowledge_point_id' => is_numeric($knowledgePointId) ? (int)$knowledgePointId : null,
                        'question_content' => $question['content'] ?? '',
                        'student_answer' => $answer['user_answer'] ?? '',
                        'correct_answer' => $question['answer'] ?? '',
                        'is_correct' => $answer['is_correct'],
                        'submission_status' => 'submitted',
                        'batch_id' => $this->currentBatchId,
                        'kp_code' => $kpCode,
                        'selected_skills' => json_encode($this->selectedSkills),
                        'skill_scores' => $this->calculateSkillScores($this->selectedSkills, $answer['is_correct']),
                        'time_spent_seconds' => rand(60, 180),
                        'difficulty_level' => is_numeric($question['difficulty'] ?? 3) ? (float)$question['difficulty'] : 3,
                        'created_at' => now(),
                        'updated_at' => now(),
                    ];

                    // 保存到 Laravel 数据库
                    \App\Models\StudentExercise::create($exerciseData);

                    // 提交给 LearningAnalytics 系统
                    $this->updateMasteryFromBatchAnswer($question, $answer['is_correct']);

                    $successCount++;

                } catch (\Exception $e) {
                    Log::error('批量答题中的单题提交失败', [
                        'student_id' => $this->studentId,
                        'question_index' => $index,
                        'error' => $e->getMessage()
                    ]);
                    $failureCount++;
                }
            }

            // 清空批量数据
            $this->exerciseQuestions = [];
            $this->exerciseAnswers = [];
            $this->currentBatchId = '';

            // 提交结果
            $totalQuestions = $successCount + $failureCount;
            $this->dispatch('notify',
                message: "批量提交完成！成功: {$successCount} 题，失败: {$failureCount} 题",
                type: $failureCount === 0 ? 'success' : 'warning'
            );

            // 批量更新技能熟练度
            try {
                $learningAnalytics = app(LearningAnalyticsService::class);
                $skillResult = $learningAnalytics->batchUpdateSkillProficiency($this->studentId);
                if ($skillResult) {
                    Log::info('技能熟练度批量更新成功', ['student_id' => $this->studentId]);
                }
            } catch (\Exception $e) {
                Log::warning('技能熟练度批量更新失败（不影响答题提交）', [
                    'student_id' => $this->studentId,
                    'error' => $e->getMessage()
                ]);
            }

        } catch (\Exception $e) {
            Log::error('批量提交答案失败', [
                'student_id' => $this->studentId,
                'batch_id' => $this->currentBatchId,
                'error' => $e->getMessage()
            ]);
            $this->dispatch('notify', message: '批量提交失败：' . $e->getMessage(), type: 'danger');
        } finally {
            $this->isLoading = false;
        }
    }

    // 测试方法
    public function testClick(): void
    {
        $this->testClickCount++;

        Log::info('测试按钮被点击，当前计数: ' . $this->testClickCount);

        $this->dispatch('notify', message: "测试按钮点击成功！计数: {$this->testClickCount}", type: 'success');
    }

    public function incrementCounter(): void
    {
        $this->testClickCount++;
        Log::info('计数器增加: ' . $this->testClickCount);
    }

    }