from app.models import KnowledgeModel, group_knowledge_table
from app.models.user_model import UserModel
from Log import logger


async def get_knowledge_list(db, user_id, keyword, page_size, page_index):
    user = db.query(UserModel).filter(UserModel.id == user_id).first()
    if user is None:
        return {"rows": []}
    if user.permission == "admin":
        query = db.query(KnowledgeModel)
    else:
        group_list = [i.id for i in user.groups]
        query = db.query(KnowledgeModel)
        query = query.filter(KnowledgeModel.tenant_id == user_id)

        query = query.union(
            db.query(KnowledgeModel).join(
                group_knowledge_table,
                KnowledgeModel.id == group_knowledge_table.c.knowledge_id
            ).filter(
                group_knowledge_table.c.group_id.in_(group_list)
            )
        )
    if keyword:
        query = query.filter(KnowledgeModel.name.like('%{}%'.format(keyword)))
    total = query.count()
    if page_size:
        query = query.limit(page_size).offset((page_index - 1) * page_size)
    return {"total":  total, "rows": [kld.to_json() for kld in query.all()]}