-- 为统计分析页面生成轻医美场景的模拟数据（简化版）
-- 使用方法: docker-compose -f docker-compose.dev.yml exec -T mysql-dev mysql -u root -p'nj861021' kaopeilian < kaopeilian-backend/scripts/seed_statistics_demo_data_v2.sql

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ============================================
-- 1. 获取用户ID（使用admin用户）
-- ============================================
SET @user_id = (SELECT id FROM users WHERE username = 'admin' LIMIT 1);
SET @user_id = IFNULL(@user_id, (SELECT id FROM users WHERE role = 'trainee' LIMIT 1));
SET @user_id = IFNULL(@user_id, 1);

SELECT CONCAT('✓ 使用用户: ', (SELECT username FROM users WHERE id = @user_id), ' (ID: ', @user_id, ')') AS '';

-- ============================================
-- 2. 清理旧数据
-- ============================================
DELETE FROM exam_mistakes WHERE user_id = @user_id;
DELETE FROM exams WHERE user_id = @user_id;
DELETE FROM practice_dialogues WHERE session_id IN (
    SELECT session_id FROM practice_sessions WHERE user_id = @user_id
);
DELETE FROM practice_reports WHERE session_id IN (
    SELECT session_id FROM practice_sessions WHERE user_id = @user_id
);
DELETE FROM practice_sessions WHERE user_id = @user_id;

SELECT '✓ 旧数据清理完成' AS '';

-- ============================================
-- 3. 生成考试记录（过去60天，呈现进步趋势）
-- ============================================
-- 使用临时表生成日期序列
DROP TEMPORARY TABLE IF EXISTS date_series;
CREATE TEMPORARY TABLE date_series (
    day_offset INT,
    exam_date DATETIME,
    progress_factor DECIMAL(5,2)
);

-- 生成60天的日期，30%的天数有考试
INSERT INTO date_series (day_offset, exam_date, progress_factor)
SELECT 
    n.day_offset,
    DATE_SUB(NOW(), INTERVAL n.day_offset DAY) + INTERVAL FLOOR(RAND() * 43200) SECOND AS exam_date,
    (60 - n.day_offset) / 60 AS progress_factor
FROM (
    SELECT 1 AS day_offset UNION ALL SELECT 3 UNION ALL SELECT 5 UNION ALL SELECT 7 UNION ALL SELECT 9
    UNION ALL SELECT 11 UNION ALL SELECT 13 UNION ALL SELECT 15 UNION ALL SELECT 17 UNION ALL SELECT 19
    UNION ALL SELECT 21 UNION ALL SELECT 23 UNION ALL SELECT 25 UNION ALL SELECT 27 UNION ALL SELECT 29
    UNION ALL SELECT 31 UNION ALL SELECT 33 UNION ALL SELECT 35 UNION ALL SELECT 37 UNION ALL SELECT 39
    UNION ALL SELECT 41 UNION ALL SELECT 43 UNION ALL SELECT 45 UNION ALL SELECT 47 UNION ALL SELECT 49
    UNION ALL SELECT 51 UNION ALL SELECT 53 UNION ALL SELECT 55 UNION ALL SELECT 57 UNION ALL SELECT 59
) AS n;

-- 生成考试记录
INSERT INTO exams (
    user_id, course_id, exam_name, question_count, total_score, pass_score,
    start_time, end_time, duration_minutes, round1_score, score, is_passed, status,
    created_at, updated_at
)
SELECT
    @user_id,
    c.id,
    CONCAT(c.name, '测试'),
    10,
    100.0,
    60.0,
    ds.exam_date,
    DATE_ADD(ds.exam_date, INTERVAL (20 + FLOOR(RAND() * 25)) MINUTE),
    20 + FLOOR(RAND() * 25),
    -- 分数呈现进步趋势：基础分60分，根据时间进度增加0-35分
    ROUND(60 + (ds.progress_factor * 20) + (RAND() * 15), 1) AS round1_score,
    ROUND(60 + (ds.progress_factor * 20) + (RAND() * 15), 1) AS score,
    TRUE,
    'submitted',
    ds.exam_date,
    ds.exam_date
FROM date_series ds
CROSS JOIN courses c
WHERE c.is_deleted = FALSE AND c.status = 'published'
ORDER BY RAND()
LIMIT 50;

-- 更新is_passed状态
UPDATE exams SET is_passed = (round1_score >= pass_score) WHERE user_id = @user_id;

SELECT CONCAT('✓ 创建了 ', COUNT(*), ' 条考试记录') AS '' 
FROM exams WHERE user_id = @user_id;

-- ============================================
-- 4. 生成错题记录（增强版 - 确保足够的错题数据）
-- ============================================
-- 为每个考试生成3-5个错题，不管分数高低
-- 这样可以确保有足够的统计样本

-- 方法：为每个考试生成多个错题
INSERT INTO exam_mistakes (
    user_id, exam_id, question_id, knowledge_point_id,
    question_content, correct_answer, user_answer, question_type,
    created_at, updated_at
)
SELECT
    e.user_id,
    e.id,
    NULL,
    kp.id,
    CONCAT('关于"', kp.name, '"的', 
           ELT(1 + FLOOR(RAND() * 3), '概念理解', '实际应用', '综合分析'), '问题'),
    CONCAT('正确答案：', kp.name, '的标准解释'),
    CONCAT('错误理解：', '学员对', kp.name, '的误解'),
    ELT(1 + FLOOR(RAND() * 5), 'single_choice', 'multiple_choice', 'true_false', 'fill_blank', 'essay'),
    e.start_time,
    e.start_time
FROM exams e
CROSS JOIN (
    SELECT 1 AS mistake_num UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4
) AS mistake_counts
INNER JOIN knowledge_points kp ON kp.course_id = e.course_id
WHERE e.user_id = @user_id
  AND kp.is_deleted = FALSE
  -- 高分考试（90+）生成1-2个错题
  AND (
    (e.round1_score >= 90 AND mistake_counts.mistake_num <= 2 AND RAND() < 0.5)
    -- 中等分数（80-90）生成2-3个错题
    OR (e.round1_score >= 80 AND e.round1_score < 90 AND mistake_counts.mistake_num <= 3 AND RAND() < 0.7)
    -- 一般分数（70-80）生成3-4个错题
    OR (e.round1_score >= 70 AND e.round1_score < 80 AND mistake_counts.mistake_num <= 4 AND RAND() < 0.8)
    -- 低分（<70）生成4-5个错题
    OR (e.round1_score < 70 AND mistake_counts.mistake_num <= 5 AND RAND() < 0.9)
  )
ORDER BY RAND()
LIMIT 250;

SELECT CONCAT('✓ 创建了 ', COUNT(*), ' 条错题记录') AS '' 
FROM exam_mistakes WHERE user_id = @user_id;

-- ============================================
-- 5. 生成陪练会话记录
-- ============================================
INSERT INTO practice_sessions (
    session_id, user_id, scene_id, scene_name, scene_type,
    start_time, end_time, duration_seconds, turns, status, is_deleted,
    created_at, updated_at
)
SELECT
    CONCAT('session_', @user_id, '_', UNIX_TIMESTAMP(practice_dt)),
    @user_id,
    1 + FLOOR(RAND() * 5),
    ELT(1 + FLOOR(RAND() * 5), '电话销售陪练', '面对面咨询陪练', '客户投诉处理陪练', '售后服务陪练', '产品介绍陪练'),
    ELT(1 + FLOOR(RAND() * 5), 'phone', 'face', 'complaint', 'after-sales', 'product-intro'),
    practice_dt,
    DATE_ADD(practice_dt, INTERVAL duration_sec SECOND),
    duration_sec,
    12 + FLOOR(RAND() * 18),
    'completed',
    FALSE,
    practice_dt,
    practice_dt
FROM (
    SELECT 
        DATE_SUB(NOW(), INTERVAL FLOOR(RAND() * 60) DAY) + INTERVAL FLOOR(RAND() * 43200) SECOND AS practice_dt,
        900 + FLOOR(RAND() * 900) AS duration_sec
    FROM (
        SELECT 1 AS n UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5
        UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9 UNION ALL SELECT 10
        UNION ALL SELECT 11 UNION ALL SELECT 12 UNION ALL SELECT 13 UNION ALL SELECT 14 UNION ALL SELECT 15
        UNION ALL SELECT 16 UNION ALL SELECT 17 UNION ALL SELECT 18
    ) AS numbers
) AS practice_dates;

SELECT CONCAT('✓ 创建了 ', COUNT(*), ' 条陪练会话记录') AS '' 
FROM practice_sessions WHERE user_id = @user_id;

-- ============================================
-- 6. 统计汇总
-- ============================================
SELECT '========================================' AS '';
SELECT '✅ 数据生成完成！' AS '';
SELECT '========================================' AS '';

SELECT CONCAT('用户: ', username, ' (ID: ', id, ')') AS ''
FROM users WHERE id = @user_id;

SELECT CONCAT('✓ 考试记录: ', COUNT(*), ' 条') AS ''
FROM exams WHERE user_id = @user_id;

SELECT CONCAT('✓ 错题记录: ', COUNT(*), ' 条') AS ''
FROM exam_mistakes WHERE user_id = @user_id;

SELECT CONCAT('✓ 陪练记录: ', COUNT(*), ' 条') AS ''
FROM practice_sessions WHERE user_id = @user_id;

SELECT CONCAT('✓ 知识点数量: ', COUNT(*), ' 个') AS ''
FROM knowledge_points WHERE is_deleted = FALSE;

SELECT '========================================' AS '';
SELECT '现在可以访问统计分析页面查看数据：' AS '';
SELECT 'http://localhost:5173/analysis/statistics' AS '';
SELECT '========================================' AS '';

-- 清理临时表
DROP TEMPORARY TABLE IF EXISTS date_series;

SET FOREIGN_KEY_CHECKS = 1;