# workspace_upload.dspy - 上传文件到工作空间目录（base64 JSON body）

import os
import base64
from urllib.parse import unquote

def _decode_id(s):
    for _ in range(4):
        if '%' not in s:
            break
        s2 = unquote(s)
        if s2 == s:
            break
        s = s2
    return s

folder_id = _decode_id((params_kw or {}).get('id', '').strip())
filename = (params_kw or {}).get('filename', '').strip()
filedata = (params_kw or {}).get('filedata', '').strip()

uid = await get_user()
if not uid:
    uid = 'user-01'

session_id = (params_kw or {}).get('session_id', '') or ''
pipeline_id = (params_kw or {}).get('pipeline_id', '') or ''

dbname = get_module_dbname('pipeline-sdlc')

async with DBPools().sqlorContext(dbname) as sor:
    # 产线隔离：跨产线项目视为无项目（与弹窗入口一致，防绕过）
    project_dir, _ = await get_project_dir_pl(sor, uid, session_id, pipeline_id)
    space_dir, _ = await get_space_dir(sor, uid, session_id)
    # 通用会话（pipeline_id=_generic）：锁用户专属目录 _general/{uid}，
    # 不进入任何项目的工作空间（2026-09-08 用户要求）
    if pipeline_id == '_generic':
        _gd = generic_workspace_dir(uid)
        os.makedirs(_gd, exist_ok=True)
        project_dir = _gd
        space_dir = _gd

if not project_dir or not os.path.isdir(project_dir):
    return {"status": "error", "message": "项目目录不可用"}

target_dir = resolve_workspace_path(project_dir, space_dir, folder_id)

if not os.path.isdir(target_dir):
    return {"status": "error", "message": "目标目录不存在: " + folder_id}

# 防止路径穿越
filename = os.path.basename(filename)
if not filename:
    return {"status": "error", "message": "文件名无效"}

if not filedata:
    return {"status": "error", "message": "文件内容为空"}

# 解码 base64
try:
    if filedata.startswith('data:'):
        _, b64 = filedata.split(',', 1)
    else:
        b64 = filedata
    data = base64.b64decode(b64)
except Exception as e:
    return {"status": "error", "message": "文件解码失败: " + str(e)}

target_path = os.path.join(target_dir, filename)
try:
    with open(target_path, 'wb') as f:
        f.write(data)
except Exception as e:
    return {"status": "error", "message": "写入失败: " + str(e)}

return {"status": "ok", "message": "上传成功: " + filename}