<?php
/**
 * 验证 aggregateByStudent 的"考试次数 / 历史明细"修复：
 * 多次提交的学生在 dedupe=true（默认）与 dedupe=false 两种情况下，
 * attempts 都应等于真实提交次数、attempts_list 都应包含全部提交；
 * dedupe 仅影响"代表成绩"那一行取最新或最高分。
 */
require __DIR__ . '/../bootstrap.php';

$fail = 0;
$pass = 0;
function check(string $name, bool $cond, string $detail = ''): void
{
    global $fail, $pass;
    if ($cond) {
        $pass++;
        echo "  ✅ {$name}\n";
    } else {
        $fail++;
        echo "  ❌ {$name}  {$detail}\n";
    }
}

/**
 * 构造一个学生的多次提交（模拟 第二周测试 中"陈苏豫 11次"这类数据）
 * 提交时间递增（旧 -> 新），分数有高有低。
 */
function makeRows(string $sid, array $scoresByTime): array
{
    $rows = [];
    $t = 1000; // 递增时间戳
    foreach ($scoresByTime as $sc) {
        $t += 600;
        $rows[] = [
            'sid'         => $sid,
            'name'        => '测试生',
            'cls'         => '1班',
            'grp'         => 'A',
            'score'       => $sc,
            'submit_ts'   => $t,
            'submit_at'   => date('Y-m-d H:i:s', $t),
            'duration'    => 120,
            'duration_txt'=> '2分0秒',
            'answer_id'   => 'ans-' . $t,
            'matched'     => true,
            'temp_save'   => false,
        ];
    }
    return $rows;
}

echo "== dedupe=true（默认：代表成绩取最新一份）==\n";
// 11 次提交：分数各不相同，最新一份是 84.0，最高是 98.0
$scores = [84.0, 98.0, 96.0, 96.0, 96.0, 94.0, 94.0, 96.0, 90.0, 88.0, 98.0];
$rows = makeRows('S001', $scores);
$agg = DataService::aggregateByStudent($rows, true);
check('聚合后只有 1 行（一人一行）', count($agg['rows']) === 1);
$r = $agg['rows'][0];
check('attempts = 11（真实次数，而非被吞成 1）', ($r['attempts'] ?? 0) === 11, 'got ' . var_export($r['attempts'] ?? null, true));
check('attempts_list 含 11 条（历史可展开全部）', count($r['attempts_list'] ?? []) === 11, 'got ' . count($r['attempts_list'] ?? []));
check('best_score = 98.0（跨全部尝试的真实最高分）', (float)($r['best_score'] ?? -1) === 98.0, 'got ' . var_export($r['best_score'] ?? null, true));
// 代表成绩 = 最新一份（数组中最后一个时间 = 98.0，因为 scores 数组最后一个是 98.0；注意最新提交对应最后构造的 98.0）
check('代表成绩取最新提交 = 98.0', (float)($r['score'] ?? -1) === 98.0, 'got ' . var_export($r['score'] ?? null, true));
check('attempts_list 项数 idx 连续 1..11', (int)($r['attempts_list'][10]['idx'] ?? 0) === 11);
check('attempts_list 至少一条 is_best（最高分标记）', count(array_filter($r['attempts_list'], fn($a) => !empty($a['is_best']))) >= 1);

echo "\n== dedupe=false（代表成绩取最高分）==\n";
$agg2 = DataService::aggregateByStudent($rows, false);
$r2 = $agg2['rows'][0];
check('attempts = 11（与 dedupe 无关，始终真实）', ($r2['attempts'] ?? 0) === 11, 'got ' . var_export($r2['attempts'] ?? null, true));
check('attempts_list 含 11 条', count($r2['attempts_list'] ?? []) === 11, 'got ' . count($r2['attempts_list'] ?? []));
check('代表成绩取最高分 = 98.0', (float)($r2['score'] ?? -1) === 98.0, 'got ' . var_export($r2['score'] ?? null, true));
check('best_score = 98.0', (float)($r2['best_score'] ?? -1) === 98.0, 'got ' . var_export($r2['best_score'] ?? null, true));

echo "\n== 重考低分也应被统计（历史含低分，且因提交时间更新能被发现）==\n";
// 先考 90，后重考 70（更低）：考试次数必须=2，最新提交=70
$rows3 = makeRows('S002', [90.0, 70.0]);
$agg3 = DataService::aggregateByStudent($rows3, true);
$r3 = $agg3['rows'][0];
check('attempts = 2', ($r3['attempts'] ?? 0) === 2, 'got ' . var_export($r3['attempts'] ?? null, true));
check('attempts_list = 2 条（含低分重考）', count($r3['attempts_list'] ?? []) === 2);
check('代表成绩取最新 = 70.0', (float)($r3['score'] ?? -1) === 70.0, 'got ' . var_export($r3['score'] ?? null, true));
check('last_submit_ts 指向最新提交（重考可被高亮发现）', ($r3['last_submit_ts'] ?? 0) === $rows3[1]['submit_ts']);

echo "\n== 仅 1 次提交不受影响 ==\n";
$rows4 = makeRows('S003', [85.0]);
$agg4 = DataService::aggregateByStudent($rows4, true);
$r4 = $agg4['rows'][0];
check('单次提交 attempts = 1', ($r4['attempts'] ?? 0) === 1);
check('单次提交 attempts_list = 1', count($r4['attempts_list'] ?? []) === 1);

echo "\n========================================\n";
echo "通过 {$pass} · 失败 {$fail}\n";
exit($fail === 0 ? 0 : 1);