<?php
require_once __DIR__ . '/../../bbs/auth.php';
edu_require_login();

include_once __DIR__ . '/../../bbs/db_conn.php';

header('Content-Type: application/json');

$corp_code = $_GET['corp_code'] ?? '';
$fr_date = $_GET['fr_date'] ?? '';
$to_date = $_GET['to_date'] ?? '';
$type = $_GET['type'] ?? 'avg';

if (!$fr_date || !$to_date) {
    echo json_encode(['success' => false, 'message' => '필수 정보가 누락되었습니다.']);
    exit;
}

try {
    $pdo = db_conn();

    $sql = "
        SELECT 
            u.member_id, 
            u.name, 
            u.dept_name, 
            c.title as content_title,
            CONCAT(
                LPAD(FLOOR(h.watch_tm / 3600), 2, '0'), '시간 ',
                LPAD(FLOOR((h.watch_tm % 3600) / 60), 2, '0'), '분'
            ) as formatted_watch_tm,
            h.last_viewed_at
        FROM edu_learning_histories h
        JOIN edu_users u ON h.member_id = u.member_id AND h.sys_comp_code = u.sys_comp_code
        JOIN edu_contents c ON h.content_id = c.content_id
        WHERE (? = '' OR u.sys_comp_code = ?) AND h.last_viewed_at BETWEEN ? AND ?
        ORDER BY u.name ASC , h.last_viewed_at DESC
    ";

    $stmt = $pdo->prepare($sql);
    $stmt->execute([$corp_code, $corp_code, "$fr_date 00:00:00", "$to_date 23:59:59"]);

    $data = $stmt->fetchAll(PDO::FETCH_ASSOC);

    echo json_encode(['success' => true, 'data' => $data]);
} catch (Exception $e) {
    echo json_encode(['success' => false, 'message' => '데이터 조회 중 오류가 발생했습니다.', 'error' => $e->getMessage()]);
}