ns = params_kw.copy()
kb_id = ns.get('kb_id', '')
folder_id = ns.get('id', '')
folder_label = ns.get('label', '全部文件')
if folder_id == '__root__':
    folder_id = ''
    folder_label = '根目录'

db = DBPools()
dbname = get_module_dbname('rag')

rows = []
async with db.sqlorContext(dbname) as sor:
    if folder_id:
        recs = await sor.sqlExe(
            "SELECT id, file_name, file_type, file_size, file_path, status, chunk_count, created_at FROM documents WHERE kb_id=${kb_id}$ AND folder_id=${folder_id}$ ORDER BY created_at DESC",
            {"kb_id": kb_id, "folder_id": folder_id})
    else:
        recs = await sor.sqlExe(
            "SELECT id, file_name, file_type, file_size, file_path, status, chunk_count, created_at FROM documents WHERE kb_id=${kb_id}$ AND (folder_id IS NULL OR folder_id='') ORDER BY created_at DESC",
            {"kb_id": kb_id})
    for r in recs:
        rows.append({
            "id": r.id,
            "file_name": r.file_name,
            "file_type": r.file_type or '',
            "file_size": r.file_size or 0,
            "file_path": r.file_path or '',
            "status": r.status or '',
            "chunk_count": r.chunk_count or 0,
            "created_at": str(r.created_at)[:16] if r.created_at else ''
        })

def fmt_size(sz):
    if sz < 1024: return str(sz) + "B"
    elif sz < 1024*1024: return str(round(sz/1024, 1)) + "KB"
    else: return str(round(sz/(1024*1024), 1)) + "MB"

def trunc_name(name, maxlen=28):
    if len(name) > maxlen:
        return name[:maxlen-3] + "..."
    return name

header = {
    "widgettype": "HBox",
    "options": {"width": "100%", "padding": "10px 0", "borderBottom": "1px solid #e0e0e0", "alignItems": "center"},
    "subwidgets": [
        {"widgettype": "Text", "options": {"text": "📄 " + folder_label, "cfontsize": 14, "fontWeight": "bold", "color": "#333"}},
        {"widgettype": "Text", "options": {"text": "（" + str(len(rows)) + " 个文件）", "cfontsize": 12, "color": "#999", "marginLeft": "8px"}},
        {"widgettype": "Text", "options": {"text": "", "css": "filler"}}
    ]
}

file_widgets = [header]

if not rows:
    file_widgets.append({
        "widgettype": "Text", "options": {"text": "暂无文件", "cfontsize": 13, "color": "#aaa", "halign": "center", "marginTop": "40px"}
    })
else:
    for f in rows:
        sc = "#50b86c"; st = "完成"
        if f["status"] == "pending": sc = "#e6a23c"; st = "处理中"
        elif f["status"] == "error": sc = "#f56c6c"; st = "失败"

        file_url = f["file_path"] if f["file_path"].startswith("/idfile/") else "/idfile" + f["file_path"]
        display_name = trunc_name(f["file_name"])

        row = {
            "widgettype": "HBox",
            "options": {"width": "100%", "padding": "6px 12px", "borderBottom": "1px solid #f0f0f0", "alignItems": "center"},
            "subwidgets": [
                {"widgettype": "Text", "options": {
                    "text": "📄 " + display_name, "cfontsize": 13, "color": "#333",
                    "cwidth": 28, "textAlign": "left", "overflow": "hidden",
                    "title": f["file_name"]
                }},
                {"widgettype": "Text", "options": {"text": f["file_type"].upper(), "cfontsize": 11, "color": "#999", "cwidth": 5, "textAlign": "center"}},
                {"widgettype": "Text", "options": {"text": fmt_size(f["file_size"]), "cfontsize": 11, "color": "#999", "cwidth": 8, "textAlign": "right"}},
                {"widgettype": "Text", "options": {"text": st, "cfontsize": 11, "color": sc, "cwidth": 6, "textAlign": "center"}},
                {"widgettype": "Text", "options": {"text": f["created_at"], "cfontsize": 11, "color": "#999", "cwidth": 13, "textAlign": "center"}},
                {
                    "widgettype": "HBox", "options": {"spacing": "6px"},
                    "subwidgets": [
                        {"widgettype": "Text", "options": {"text": "👁", "cfontsize": 14, "css": "clickable", "color": "#4a90d9", "title": "查看"},
                         "binds": [{"wid": "self", "event": "click", "actiontype": "script", "target": "self",
                             "script": "window.open(" + json.dumps(file_url) + ",'_blank')"}]},
                        {"widgettype": "Text", "options": {"text": "⬇", "cfontsize": 14, "css": "clickable", "color": "#50b86c", "title": "下载"},
                         "binds": [{"wid": "self", "event": "click", "actiontype": "script", "target": "self",
                             "script": "var a=document.createElement('a');a.href=" + json.dumps(file_url) + ";a.download='';document.body.appendChild(a);a.click();document.body.removeChild(a)"}]},
                        {"widgettype": "Text", "options": {"text": "🗑", "cfontsize": 14, "css": "clickable", "color": "#f56c6c", "title": "删除"},
                         "binds": [{"wid": "self", "event": "click", "actiontype": "urlwidget", "target": "file_list_panel", "mode": "replace",
                             "options": {"url": del_url}}]}
                    ]}
            ]}
        file_widgets.append(row)

result = {"widgettype": "VBox", "options": {"width": "100%", "spacing": "0"}, "subwidgets": file_widgets}
return result