-- API使用示例：学校运动训练系统增强功能

-- ==================== 1. 教师创建运动作业 ====================

-- 1.1 查询可用的作业类型
SELECT id, name, description, requires_device, requires_video, ai_evaluation_enabled, scoring_criteria
FROM public.ak_assignment_types 
WHERE is_active = true
ORDER BY name;

-- 1.2 创建新作业（教师）
INSERT INTO public.ak_assignments (
    teacher_id, 
    title, 
    description, 
    class_id, 
    assignment_type_id,
    target_metrics,
    ai_grading_enabled,
    due_date,
    workflow_status
) VALUES (
    'teacher_user_id_here',
    '周末跑步训练',
    '完成3公里慢跑，注意心率控制在140-160之间',
    'class_id_here',
    (SELECT id FROM public.ak_assignment_types WHERE name = '跑步训练'),
    '{"distance": {"target": 3000, "unit": "meters"}, "duration": {"max": 30, "unit": "minutes"}, "heart_rate": {"min": 140, "max": 160}}',
    true,
    '2025-06-07 23:59:59',
    'draft'
);

-- 1.3 提交作业审批
SELECT public.update_assignment_workflow_status(
    'assignment_id_here',
    'submitted',
    'teacher_user_id_here',
    '请审批周末跑步训练作业'
);

-- ==================== 2. 管理员审批作业 ====================

-- 2.1 查询待审批的作业
SELECT a.id, a.title, a.description, u.username as teacher_name, c.name as class_name,
       a.created_at, a.due_date
FROM public.ak_assignments a
JOIN public.ak_users u ON a.teacher_id = u.id
JOIN public.ak_classes c ON a.class_id = c.id
WHERE a.workflow_status = 'submitted'
ORDER BY a.created_at;

-- 2.2 审批通过作业
SELECT public.update_assignment_workflow_status(
    'assignment_id_here',
    'approved',
    'admin_user_id_here',
    '作业目标合理，批准发布'
);

-- 2.3 发布作业给学生
SELECT public.update_assignment_workflow_status(
    'assignment_id_here',
    'published',
    'admin_user_id_here',
    '作业已发布给学生'
);

-- ==================== 3. 学生查看和提交作业 ====================

-- 3.1 学生查看自己的作业列表
SELECT a.id, a.title, a.description, a.due_date, a.target_metrics,
       at.name as assignment_type, at.requires_device, at.requires_video,
       s.id as submission_id, s.status as submission_status
FROM public.ak_assignments a
JOIN public.ak_assignment_types at ON a.assignment_type_id = at.id
LEFT JOIN public.ak_assignment_submissions s ON a.id = s.assignment_id AND s.student_id = 'student_user_id_here'
WHERE a.class_id = (SELECT class_id FROM public.ak_users WHERE id = 'student_user_id_here')
AND a.workflow_status = 'published'
ORDER BY a.due_date;

-- 3.2 学生提交作业（关联训练记录）
INSERT INTO public.ak_assignment_submissions (
    assignment_id,
    student_id,
    content_md,
    device_data_id,
    attachment_url,
    status
) VALUES (
    'assignment_id_here',
    'student_user_id_here',
    '## 跑步训练完成报告\n\n今天完成了3公里跑步训练，感觉良好。心率控制在目标范围内。',
    'training_record_id_here', -- 关联的训练记录
    'https://storage.url/running_video.mp4', -- 视频文件（如果需要）
    'submitted'
);

-- ==================== 4. AI自动评估 ====================

-- 4.1 查看AI评估结果（自动触发）
SELECT ae.evaluation_type, ae.confidence_score, ae.suggested_score, 
       ae.feedback_text, ae.improvement_suggestions, ae.risk_indicators
FROM public.ak_ai_evaluations ae
JOIN public.ak_assignment_submissions s ON ae.submission_id = s.id
WHERE s.assignment_id = 'assignment_id_here' 
AND s.student_id = 'student_user_id_here';

-- 4.2 教师审核AI评估结果
UPDATE public.ak_assignment_submissions 
SET ai_score = 85.5,
    manual_score = 88.0,
    final_score = 87.0,
    feedback = 'AI评估：动作标准，心率控制良好。教师评价：坚持很好，建议下次增加配速变化。',
    review_status = 'reviewed',
    reviewed_by = 'teacher_user_id_here',
    reviewed_at = now(),
    ai_feedback_approved = true
WHERE id = 'submission_id_here';

-- ==================== 5. AI训练建议生成 ====================

-- 5.1 为学生生成个性化训练建议
INSERT INTO public.ak_ai_training_suggestions (
    user_id,
    suggestion_type,
    priority,
    title,
    content,
    data_source,
    confidence_score,
    action_required
) VALUES (
    'student_user_id_here',
    'improvement',
    'medium',
    '建议增加间歇训练',
    '根据您最近的跑步数据分析，建议每周增加1-2次间歇训练，可以提高最大摄氧量和跑步效率。建议间歇方案：400米快跑 + 200米慢跑，重复6-8次。',
    '{"source": "training_records", "period": "last_30_days", "records_analyzed": 8}',
    0.82,
    false
);

-- 5.2 查询学生的AI建议
SELECT title, content, priority, confidence_score, created_at,
       action_required, acknowledged
FROM public.ak_ai_training_suggestions
WHERE user_id = 'student_user_id_here'
AND acknowledged = false
ORDER BY priority DESC, created_at DESC;

-- ==================== 6. 学习分析和统计 ====================

-- 6.1 生成学生学习分析报告
SELECT public.calculate_learning_analytics(
    'student_user_id_here',
    '2025-05-01',
    '2025-05-31'
);

-- 6.2 查看班级作业完成统计
SELECT * FROM public.vw_assignment_analytics
WHERE class_id = 'class_id_here'
ORDER BY assignment_created DESC;

-- 6.3 查看学生综合表现
SELECT * FROM public.vw_student_performance
WHERE class_id = 'class_id_here'
ORDER BY avg_score DESC;

-- ==================== 7. 数据质量监控 ====================

-- 7.1 执行数据质量检查
SELECT public.check_data_quality();

-- 7.2 查看数据质量问题
SELECT table_name, issue_type, severity, description, created_at,
       resolved, resolved_by
FROM public.ak_data_quality_logs
WHERE resolved = false
ORDER BY severity DESC, created_at DESC;

-- 7.3 标记质量问题为已解决
UPDATE public.ak_data_quality_logs
SET resolved = true,
    resolved_by = 'admin_user_id_here',
    resolved_at = now()
WHERE id = 'quality_log_id_here';

-- ==================== 8. 权限检查示例 ====================

-- 8.1 检查用户是否有权限
SELECT public.has_permission('user_id_here', 'teacher.assignment.manage');

-- 8.2 检查作用域权限
SELECT public.has_scoped_permission(
    'teacher_user_id_here', 
    'teacher.class.read',
    'class',
    'class_id_here'
);

-- 8.3 获取用户的所有权限
SELECT p.code, p.name, p.description
FROM public.ak_user_roles ur
JOIN public.ak_role_permissions rp ON ur.role_id = rp.role_id
JOIN public.ak_permissions p ON rp.permission_id = p.id
WHERE ur.user_id = 'user_id_here';

-- ==================== 9. 训练计划模板使用 ====================

-- 9.1 查询适合的训练模板
SELECT id, name, description, difficulty_level, duration_weeks, 
       target_age_min, target_age_max, ai_adaptive
FROM public.ak_training_templates
WHERE target_age_min <= 16 AND target_age_max >= 16  -- 16岁学生
AND difficulty_level <= 3  -- 中等难度以下
AND is_active = true;

-- 9.2 基于模板创建训练计划
INSERT INTO public.ak_training_plans (
    user_id,
    plan_name,
    description,
    start_date,
    end_date,
    status
)
SELECT 
    'student_user_id_here',
    '基于模板：' || name,
    description,
    CURRENT_DATE,
    CURRENT_DATE + INTERVAL '1 week' * duration_weeks,
    'active'
FROM public.ak_training_templates
WHERE id = 'template_id_here';

-- ==================== 10. 国际化支持示例 ====================

-- 10.1 获取用户语言下的UI文本
SELECT public.get_ui_text('assignment.create.title');
SELECT public.get_ui_text('assignment.submit.success');

-- 10.2 获取多语言的学校名称
SELECT public.get_school_name('school_id_here');

-- 10.3 设置用户偏好语言
UPDATE public.ak_users 
SET preferred_language = (SELECT id FROM public.ak_languages WHERE code = 'en-US')
WHERE id = 'user_id_here';

-- ==================== 11. 实时通知示例 ====================

-- 11.1 创建作业截止提醒通知
INSERT INTO public.ak_notifications (
    user_id,
    title,
    content,
    status
) 
SELECT 
    s.student_id,
    '作业截止提醒',
    '您的作业"' || a.title || '"将在24小时内截止，请及时完成。',
    'unread'
FROM public.ak_assignments a
JOIN public.ak_assignment_submissions s ON a.id = s.assignment_id
WHERE a.due_date BETWEEN now() AND now() + INTERVAL '24 hours'
AND s.status != 'submitted';

-- 11.2 查询用户未读通知
SELECT title, content, created_at
FROM public.ak_notifications
WHERE user_id = 'user_id_here'
AND status = 'unread'
ORDER BY created_at DESC;

-- ==================== 12. 综合报表查询 ====================

-- 12.1 学校运动训练概览报表
WITH school_stats AS (
    SELECT 
        s.id as school_id,
        s.name as school_name,
        COUNT(DISTINCT c.id) as total_classes,
        COUNT(DISTINCT u.id) as total_students,
        COUNT(DISTINCT ut.id) as total_teachers,
        COUNT(DISTINCT a.id) as total_assignments,
        COUNT(DISTINCT sub.id) as total_submissions
    FROM public.ak_schools s
    LEFT JOIN public.ak_grades g ON s.id = g.school_id
    LEFT JOIN public.ak_classes c ON g.id = c.grade_id
    LEFT JOIN public.ak_users u ON c.id = u.class_id AND u.role = 'student'
    LEFT JOIN public.ak_users ut ON s.id = ut.school_id AND ut.role = 'teacher'
    LEFT JOIN public.ak_assignments a ON c.id = a.class_id
    LEFT JOIN public.ak_assignment_submissions sub ON a.id = sub.assignment_id
    GROUP BY s.id, s.name
)
SELECT *,
    CASE WHEN total_assignments > 0 
         THEN ROUND(total_submissions::numeric / total_assignments * 100, 2)
         ELSE 0 
    END as submission_rate_percent
FROM school_stats
ORDER BY total_students DESC;

-- 12.2 教师工作量统计
SELECT 
    u.username as teacher_name,
    c.name as class_name,
    COUNT(a.id) as assignments_created,
    COUNT(sub.id) as submissions_received,
    COUNT(CASE WHEN sub.review_status = 'reviewed' THEN 1 END) as submissions_reviewed,
    AVG(sub.final_score) as avg_score_given,
    COUNT(CASE WHEN sub.ai_feedback_approved = true THEN 1 END) as ai_feedbacks_approved
FROM public.ak_users u
JOIN public.ak_classes c ON u.class_id = c.id
LEFT JOIN public.ak_assignments a ON u.id = a.teacher_id
LEFT JOIN public.ak_assignment_submissions sub ON a.id = sub.assignment_id
WHERE u.role = 'teacher'
GROUP BY u.id, u.username, c.name
ORDER BY assignments_created DESC;

-- ==================== 13. 性能优化查询示例 ====================

-- 13.1 使用索引优化的学生作业查询
EXPLAIN (ANALYZE, BUFFERS) 
SELECT a.title, s.submit_time, s.final_score
FROM public.ak_assignment_submissions s
JOIN public.ak_assignments a ON s.assignment_id = a.id
WHERE s.student_id = 'student_user_id_here'
AND s.submit_time >= '2025-05-01'
ORDER BY s.submit_time DESC;

-- 13.2 批量更新AI评估状态
UPDATE public.ak_assignment_submissions 
SET ai_feedback_approved = true
WHERE id IN (
    SELECT s.id 
    FROM public.ak_assignment_submissions s
    JOIN public.ak_ai_evaluations ae ON s.id = ae.submission_id
    WHERE ae.confidence_score > 0.9 
    AND s.ai_feedback_approved = false
    LIMIT 100
);

-- 这些示例展示了如何在实际应用中使用增强后的运动训练系统
-- 涵盖了完整的业务流程：从作业创建到AI评估，再到数据分析和质量监控