<?php

namespace App\Filament\Pages;

use App\Models\Student;
use App\Models\Teacher;
use App\Services\ExamPaperService;
use App\Filament\Traits\HasUserRole;
use BackedEnum;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use Livewire\Attributes\Computed;
use Livewire\Attributes\On;
use UnitEnum;

class UploadExamPaper extends Page
{
    use HasUserRole;

    protected static ?string $title = '上传试卷';
    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-cloud-arrow-up';
    protected static ?string $navigationLabel = '上传试卷';
    protected static string|UnitEnum|null $navigationGroup = '卷子生成管理';
    protected static ?int $navigationSort = 2;
    protected static ?string $slug = 'upload-exam-paper';
    protected string $view = 'filament.pages.upload-exam-paper';

    public ?string $teacherId = null;
    public ?string $studentId = null;

    // 模式选择
    public string $mode = 'select_paper'; // 'upload' 或 'select_paper'
    public ?string $selectedPaperId = null;
    public array $questions = [];
    public array $gradingData = [];
    public array $questionGrades = []; // 存储每道题的评分

    public function mount()
    {
        // 初始化用户角色
        $this->initializeUserRole();

        // 如果是老师，自动选择当前老师
        if ($this->isTeacher) {
            $teacherId = $this->getCurrentTeacherId();
            if ($teacherId) {
                $this->teacherId = $teacherId;
            }
        } else {
            $this->teacherId = null;
        }

        $this->studentId = null;
        $this->mode = 'select_paper';
        $this->selectedPaperId = null;
        $this->questionGrades = [];
    }

    #[Computed]
    public function teachers(): array
    {
        return app(ExamPaperService::class)->getTeachers(
            $this->isTeacher ? $this->getCurrentTeacherId() : null
        );
    }

    #[Computed]
    public function students(): array
    {
        return app(ExamPaperService::class)->getStudents($this->teacherId);
    }

    #[Computed]
    public function recentRecords(): array
    {
        return app(ExamPaperService::class)->getRecentRecords($this->studentId);
    }

    #[Computed]
    public function studentPapers(): array
    {
        return app(ExamPaperService::class)->getStudentPapers($this->studentId);
    }

    #[Computed]
    public function selectedPaperQuestions(): array
    {
        return app(ExamPaperService::class)->getPaperQuestions($this->selectedPaperId);
    }

    public function updatedTeacherId($value): void
    {
        // 当教师选择变化时，清空之前选择的学生
        $this->studentId = null;
        $this->selectedPaperId = null;
        $this->questionGrades = [];
    }

    public function updatedStudentId($value): void
    {
        // 当学生选择变化时，清空已选试卷
        $this->selectedPaperId = null;
        $this->questionGrades = [];
    }

    public function updatedMode($value): void
    {
        // 切换模式时重置相关字段
        $this->selectedPaperId = null;
        $this->questionGrades = [];
    }

    /**
     * 处理评分完成事件
     */
    #[On('gradingComplete')]
    public function handleGradingComplete(): void
    {
        // 提交完成后跳转到详情页
        if ($this->selectedPaperId && $this->studentId) {
            $url = $this->getViewRecordUrl('graded_paper', $this->selectedPaperId, '', $this->studentId);
            $this->redirect($url, navigate: true);
        }
    }

    /**
     * 处理来自子组件的评分提交事件
     */
    #[On('submitManualGrading')]
    public function handleSubmitFromParent(array $questionGrades, array $gradingData, array $questions): void
    {
        // 从子组件接收数据
        $this->questionGrades = $questionGrades;
        $this->gradingData = $gradingData;
        $this->questions = $questions;

        \Log::info('UploadExamPaper: 接收到子组件提交的评分数据', [
            'questionGrades_count' => count($questionGrades),
            'questions_count' => count($questions)
        ]);

        // 调用原有的提交方法
        $this->submitManualGrading();

        // 通知用户提交成功
        Notification::make()
            ->title('评分提交成功')
            ->success()
            ->send();

        // 触发事件处理跳转
        $this->dispatch('gradingComplete');
    }

    #[On('teacherChanged')]
    public function updateTeacherId($teacherId)
    {
        $this->teacherId = $teacherId;
        $this->studentId = null;
    }

    #[On('studentChanged')]
    public function updateStudentId($teacherId, $studentId)
    {
        $this->studentId = $studentId;
    }

    /**
     * 提交手动评分
     */
    public function submitManualGrading(): void
    {
        if (!$this->selectedPaperId) {
            Notification::make()
                ->title('请选择试卷')
                ->danger()
                ->send();
            return;
        }

        // 将 gradingData 转换为 questionGrades 格式
        // 注意：这里假设子组件已经传递了处理好的 questionGrades，或者我们在这里再次处理
        // 如果子组件传递了 questionGrades，我们直接使用它。
        // 如果没有（比如直接在父组件调用），我们需要 convertGradingDataToQuestionGrades。
        // 但目前逻辑是子组件调用 handleSubmitFromParent 传递数据。

        if (empty($this->questionGrades)) {
            Notification::make()
                ->title('请至少为一道题目评分')
                ->danger()
                ->send();
            return;
        }

        try {
            // 准备数据发送到 LearningAnalytics
            $analyticsData = [];

            // 获取题目详情以便查找kp_code
            $questionsMap = collect($this->selectedPaperQuestions)->keyBy('id');

            // 收集需要从API补充信息的题目ID
            $missingKpCodeQuestionIds = [];

            foreach ($this->questionGrades as $questionId => $grade) {
                $question = $questionsMap->get($questionId);
                if (!$question) {
                    continue;
                }

                // 优先使用本地存储的 kp_code
                if (empty($question['kp_code'])) {
                    $missingKpCodeQuestionIds[] = $questionId;
                }
            }

            // 如果有缺失 kp_code 的题目，尝试从 API 获取
            $apiDetailsMap = collect([]);
            if (!empty($missingKpCodeQuestionIds)) {
                $questionBankIds = collect($missingKpCodeQuestionIds)
                    ->map(fn($qId) => $questionsMap->get($qId)['question_bank_id'] ?? null)
                    ->filter()
                    ->toArray();

                if (!empty($questionBankIds)) {
                    $questionBankService = app(\App\Services\QuestionBankService::class);
                    $questionsDetails = $questionBankService->getQuestionsByIds($questionBankIds);
                    $apiDetailsMap = collect($questionsDetails['data'] ?? [])->keyBy('id');
                }
            }

            foreach ($this->questionGrades as $questionId => $grade) {
                $question = $questionsMap->get($questionId);
                if (!$question) {
                    continue;
                }

                $kpCode = $question['kp_code'];

                // 如果本地没有，尝试从API结果中获取
                if (empty($kpCode)) {
                    $detail = $apiDetailsMap->get($question['question_bank_id']);
                    $kpCode = $detail['kp_code'] ?? $detail['knowledge_point_code'] ?? null;
                }

                // 确保 is_correct 有值（如果为 null，设置为 false）
                $isCorrect = $grade['is_correct'];
                if ($isCorrect === null) {
                    $isCorrect = false;
                }

                $analyticsData[] = [
                    'question_bank_id' => $question['question_bank_id'],
                    'student_answer' => $grade['student_answer'] ?? '',
                    'is_correct' => $isCorrect,
                    'score' => $grade['score'] ?? 0,
                    'max_score' => $question['score'] ?? 0,
                    'kp_code' => $kpCode,
                    'ip_address' => '127.0.0.1', // 提供默认IP地址，避免PostgreSQL inet类型错误
                    'device_type' => 'web', // 提供默认设备类型
                    'feedback_provided' => false, // 提供默认反馈状态
                ];
            }

            // 调用 LearningAnalytics 服务
            $learningAnalyticsService = app(\App\Services\LearningAnalyticsService::class);

            // 步骤0: 保存学生答案到本地数据库 (重要：确保数据持久化)
            foreach ($this->questionGrades as $questionId => $grade) {
                // 从数据库获取当前题目的记录（包含满分）
                $paperQuestion = \App\Models\PaperQuestion::where('id', $questionId)->first();
                if (!$paperQuestion) {
                    \Log::warning('未找到题目记录', ['question_id' => $questionId]);
                    continue;
                }

                // 确保 is_correct 是布尔值（转换字符串 'true'/'false' 为布尔值）
                $isCorrect = $grade['is_correct'];
                if ($isCorrect === 'true' || $isCorrect === true) {
                    $isCorrect = true;
                } elseif ($isCorrect === 'false' || $isCorrect === false) {
                    $isCorrect = false;
                }

                // 确保 score_obtained 是数字
                $score = $grade['score'];
                if ($score !== null) {
                    $score = is_numeric($score) ? (float)$score : 0;
                }

                // **关键修复**：确保 is_correct 和 score 的一致性
                // score 优先级高于 is_correct，根据得分比例动态计算
                $maxScore = $paperQuestion->score ?? 0;
                if ($maxScore > 0) {
                    $scoreRatio = $score / $maxScore;
                    // 只有达到满分才算完全正确
                    if ($scoreRatio >= 1.0) {
                        $isCorrect = true;
                    } elseif ($scoreRatio > 0) {
                        $isCorrect = false; // 部分得分不算完全正确
                    } else {
                        $isCorrect = false;
                    }
                }

                \Log::info('保存评分数据', [
                    'question_id' => $questionId,
                    'max_score' => $maxScore,
                    'score_obtained' => $score,
                    'is_correct' => $isCorrect,
                    'score_ratio' => $maxScore > 0 ? ($score / $maxScore) : 0
                ]);

                \App\Models\PaperQuestion::where('id', $questionId)->update([
                    'student_answer' => $grade['student_answer'] ?? '',
                    'is_correct' => $isCorrect,
                    'score_obtained' => $score ?? 0,
                ]);
            }

            \Log::info('学生答案已保存到数据库', [
                'student_id' => $this->studentId,
                'paper_id' => $this->selectedPaperId,
                'updated_count' => count($this->questionGrades)
            ]);

            // 步骤1: 保存答题记录到 LearningAnalytics
            \Log::info('准备调用submitBatchAttempts API', [
                'student_id' => $this->studentId,
                'paper_id' => $this->selectedPaperId,
                'analytics_data_sample' => array_slice($analyticsData, 0, 2) // 记录前2题的数据作为样本
            ]);

            $result = $learningAnalyticsService->submitBatchAttempts($this->studentId, [
                'paper_id' => $this->selectedPaperId,
                'answers' => $analyticsData,
            ]);

            // 检查API返回结果
            if (is_array($result) && isset($result['error']) && $result['error']) {
                throw new \Exception($result['message'] ?? 'API调用失败');
            }

            if ($result === null || (is_array($result) && empty($result))) {
                throw new \Exception('API返回空数据');
            }

            \Log::info('答题记录已保存到学习分析服务', [
                'student_id' => $this->studentId,
                'paper_id' => $this->selectedPaperId,
                'count' => count($analyticsData)
            ]);

            // 步骤2: 触发 AI 分析(包含掌握度更新和学习报告生成)
            try {
                // 构造 AI 分析请求数据
                $analysisQuestions = [];
                foreach ($this->questionGrades as $questionId => $grade) {
                    $question = $questionsMap->get($questionId);
                    if (!$question) {
                        continue;
                    }

                    $kpCode = $question['kp_code'];
                    if (empty($kpCode)) {
                        $detail = $apiDetailsMap->get($question['question_bank_id']);
                        $kpCode = $detail['kp_code'] ?? $detail['knowledge_point_code'] ?? null;
                    }

                    // 计算满分
                    $maxScore = floatval($question['score'] ?? 0);
                    $scoreValue = floatval($grade['score'] ?? 0);
                    $isCorrect = $maxScore > 0 ? ($scoreValue >= $maxScore) : ($grade['is_correct'] ?? false);

                    $analysisQuestions[] = [
                        'question_id' => $question['question_bank_id'],
                        'question_number' => (string)$question['question_number'],
                        'question_text' => $question['content'] ?? '',
                        'student_answer' => $grade['student_answer'] ?? '',
                        'correct_answer' => $question['answer'] ?? '',
                        'kp_code' => $kpCode,
                        'score_value' => $scoreValue,
                        'max_score' => $maxScore,
                        'is_correct' => $isCorrect,
                        'teacher_validated' => true, // 手动评分即为教师验证
                        'ocr_confidence' => 1.0, // 手动评分置信度为1
                    ];
                }

                $analysisData = [
                    'exam_id' => $this->selectedPaperId,
                    'student_id' => $this->studentId,
                    'ocr_record_id' => 0, // 系统生成卷子没有OCR记录ID
                    'paper_id' => $this->selectedPaperId,
                    'teacher_name' => auth()->user()->name ?? 'Teacher',
                    'analysis_type' => 'mastery',
                    'questions' => $analysisQuestions,
                ];

                // 调用统一的 AI 分析接口
                \Log::info('准备调用submitOCRAnalysis API', [
                    'paper_id' => $this->selectedPaperId,
                    'student_id' => $this->studentId,
                    'analysis_data_sample' => [
                        'question_count' => count($analysisQuestions),
                        'first_question' => $analysisQuestions[0] ?? null
                    ]
                ]);

                $analysisResult = $learningAnalyticsService->submitOCRAnalysis($analysisData);

                \Log::info('AI分析已触发', [
                    'paper_id' => $this->selectedPaperId,
                    'student_id' => $this->studentId,
                    'analysis_result_keys' => is_array($analysisResult) ? array_keys($analysisResult) : 'not_array',
                    'analysis_result' => $analysisResult
                ]);

                // 保存 analysis_id 到 Paper 表
                if (isset($analysisResult['analysis_id'])) {
                    \App\Models\Paper::where('paper_id', $this->selectedPaperId)->update([
                        'analysis_id' => $analysisResult['analysis_id'],
                    ]);

                    \Log::info('已保存 analysis_id', [
                        'paper_id' => $this->selectedPaperId,
                        'analysis_id' => $analysisResult['analysis_id']
                    ]);
                }

            } catch (\Exception $analysisError) {
                // AI 分析失败不影响主流程
                \Log::warning('触发AI分析失败', [
                    'paper_id' => $this->selectedPaperId,
                    'error' => $analysisError->getMessage()
                ]);
            }

            // 更新Paper表状态为已完成评分
            \App\Models\Paper::where('paper_id', $this->selectedPaperId)->update([
                'status' => 'completed',
                'completed_at' => now(),
            ]);

            Notification::make()
                ->title('提交成功')
                ->body('评分已提交,AI分析正在进行中')
                ->success()
                ->send();

            // 刷新最近记录列表
            unset($this->recentRecords);

            // 重置表单
            $this->selectedPaperId = null;
            $this->questionGrades = [];

        } catch (\Exception $e) {
            \Log::error('提交手动评分失败', [
                'error' => $e->getMessage(),
                'student_id' => $this->studentId,
                'paper_id' => $this->selectedPaperId,
            ]);

            Notification::make()
                ->title('提交失败')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    /**
     * 查看记录详情 - 使用页面跳转
     */
    public function getViewRecordUrl(string $type, string $paperId, string $recordId, string $studentId): string
    {
        // 返回ExamAnalysis详情页面URL
        if (in_array($type, ['graded_paper', 'generated'])) {
            // 系统生成或已评分试卷，使用paperId
            return '/admin/exam-analysis?paperId=' . $paperId . '&studentId=' . $studentId;
        } elseif ($type === 'ocr_upload') {
            // OCR上传记录，也跳转到详情页
            return '/admin/exam-analysis?recordId=' . $recordId . '&studentId=' . $studentId;
        }
        return '#';
    }
}