from pydantic import BaseModel, ConfigDict
from typing import List, Union, Optional

from sqlalchemy import Column, String, BigInteger
from sqlalchemy.orm import Session

from apps.webui.internal.db import Base
from apps.webui.models.chats import Chats

import time
import uuid

####################
# Memory DB Schema
####################


class Memory(Base):
    __tablename__ = "memory"

    id = Column(String, primary_key=True)
    user_id = Column(String)
    content = Column(String)
    updated_at = Column(BigInteger)
    created_at = Column(BigInteger)


class MemoryModel(BaseModel):
    id: str
    user_id: str
    content: str
    updated_at: int  # timestamp in epoch
    created_at: int  # timestamp in epoch

    model_config = ConfigDict(from_attributes=True)


####################
# Forms
####################


class MemoriesTable:

    def insert_new_memory(
        self,
        db: Session,
        user_id: str,
        content: str,
    ) -> Optional[MemoryModel]:
        id = str(uuid.uuid4())

        memory = MemoryModel(
            **{
                "id": id,
                "user_id": user_id,
                "content": content,
                "created_at": int(time.time()),
                "updated_at": int(time.time()),
            }
        )
        result = Memory(**memory.dict())
        db.add(result)
        db.commit()
        db.refresh(result)
        if result:
            return MemoryModel.model_validate(result)
        else:
            return None

    def update_memory_by_id(
        self,
        db: Session,
        id: str,
        content: str,
    ) -> Optional[MemoryModel]:
        try:
            db.query(Memory).filter_by(id=id).update(
                {"content": content, "updated_at": int(time.time())}
            )
            return self.get_memory_by_id(db, id)
        except:
            return None

    def get_memories(self, db: Session) -> List[MemoryModel]:
        try:
            memories = db.query(Memory).all()
            return [MemoryModel.model_validate(memory) for memory in memories]
        except:
            return None

    def get_memories_by_user_id(self, db: Session, user_id: str) -> List[MemoryModel]:
        try:
            memories = db.query(Memory).filter_by(user_id=user_id).all()
            return [MemoryModel.model_validate(memory) for memory in memories]
        except:
            return None

    def get_memory_by_id(self, db: Session, id: str) -> Optional[MemoryModel]:
        try:
            memory = db.get(Memory, id)
            return MemoryModel.model_validate(memory)
        except:
            return None

    def delete_memory_by_id(self, db: Session, id: str) -> bool:
        try:
            db.query(Memory).filter_by(id=id).delete()
            return True

        except:
            return False

    def delete_memories_by_user_id(self, db: Session, user_id: str) -> bool:
        try:
            db.query(Memory).filter_by(user_id=user_id).delete()
            return True
        except:
            return False

    def delete_memory_by_id_and_user_id(
        self, db: Session, id: str, user_id: str
    ) -> bool:
        try:
            db.query(Memory).filter_by(id=id, user_id=user_id).delete()
            return True
        except:
            return False


Memories = MemoriesTable()