# -*- coding: utf-8 -*-
"""
数据库状态
"""
from datetime import datetime, timedelta
from random import choices
from typing import Dict, List, Tuple

from pydantic import TypeAdapter
from pydantic_ai import ModelMessage, ModelMessagesTypeAdapter
from pydantic_ai._uuid import uuid7
import reflex as rx
from sqlalchemy import desc
from sqlmodel import Field, JSON, SQLModel, select, update

from application.domain_models import Conversation, Dialog, Thought


class CaptchaRecord(SQLModel, table=True):
    """
    验证码记录
    邮箱、验证码和失效时间联合作为主键
    """

    email: str = Field(..., primary_key=True, description="邮箱")
    captcha: str = Field(
        default_factory=lambda: "".join(choices("0123456789", k=6)),
        primary_key=True,
        description="验证码",
    )
    is_valid: bool = Field(
        default=True,
        index=True,
        description="验证码有效：True 表示有效，False 表示无效",
    )
    is_verified: bool = Field(
        default=False,
        index=True,
        description="验证码已核验：True 表示已核验，False 表示未核验",
    )
    expired_at: datetime = Field(
        default_factory=lambda: datetime.now() + timedelta(minutes=30),
        primary_key=True,
        description="失效时间",
    )


class UserRecord(SQLModel, table=True):
    """
    用户记录
    """

    id: str = Field(
        default_factory=lambda: str(uuid7()),
        primary_key=True,
        description="用户唯一标识",
    )
    email: str = Field(..., index=True, description="邮箱")


class ConversationRecord(SQLModel, table=True):
    """
    会话记录
    """

    id: str = Field(
        default_factory=lambda: str(uuid7()),
        primary_key=True,
        description="会话记录唯一标识",
    )
    user_id: str = Field(..., index=True, description="用户唯一标识")
    description: str = Field(..., description="会话描述")
    is_deleted: bool = Field(
        default=False,
        index=True,
        description="会话已删除：True 表示已删除，False 表示未删除",
    )
    created_at: datetime = Field(
        default_factory=datetime.now, description="会话创建时间"
    )


class ThoughtRecord(SQLModel):
    """
    思考记录（不创建数据表）
    """

    id: str = Field(
        default_factory=lambda: str(uuid7()),
        primary_key=True,
        description="思考唯一标识",
    )
    type: str = Field(description="思考类型")
    content: str = Field(default="", description="思考内容")


class DialogRecord(SQLModel, table=True):
    """
    对话记录
    """

    id: str = Field(
        default_factory=lambda: str(uuid7()),
        primary_key=True,
        description="对话唯一标识",
    )
    conversation_id: str = Field(..., index=True, description="会话唯一标识")
    user_prompt: str = Field(..., description="用户提示词")
    thoughts: List[ThoughtRecord] = Field(
        default_factory=List, sa_type=JSON, description="思考列表"
    )
    result_output: str = Field(default="", description="结果输出")


# 运行结果表
class RunResultRecord(SQLModel, table=True):
    conversation_id: str = Field(primary_key=True, description="会话唯一标识")
    dialog_id: str = Field(primary_key=True, description="对话唯一标识")
    new_messages: str = Field(description="新增消息")


# 思考领域模型类型适配器
ThoughtTypeAdapter = TypeAdapter(List[Thought])


class DatabaseState(rx.State):
    """
    数据库状态
    """

    async def create_captcha_record(self, email: str) -> str:
        """
        创建验证码记录
        :param email: 邮箱
        :return: 所创建记录的验证码
        """
        async with rx.asession() as session:
            # 前置操作：将该邮箱有效且未核验的验证码记录设置为无效
            await session.exec(
                update(CaptchaRecord)
                .where(
                    CaptchaRecord.email == email,  # type: ignore
                    CaptchaRecord.is_valid == True,  # type: ignore
                    CaptchaRecord.is_verified == False,  # type: ignore
                )
                .values(is_valid=False)
            )
            await session.flush()
            # 创建记录
            record = CaptchaRecord(
                email=email,
            )
            session.add(record)
            await session.commit()
            await session.refresh(record)
            return record.captcha

    async def verify_captcha(self, email: str, captcha: str) -> bool:
        """
        核验验证码
        :param email: 邮箱
        :param captcha: 验证码
        :return: 是否核验成功，True 表示核验成功，False 表示核验失败（根据邮箱和验证码未查询到有效且未核验的记录，或失效）
        """
        async with rx.asession() as session:
            result = await session.exec(
                select(CaptchaRecord).where(
                    CaptchaRecord.email == email,
                    CaptchaRecord.captcha == captcha,
                    CaptchaRecord.is_valid == True,
                    CaptchaRecord.is_verified == False,
                    CaptchaRecord.expired_at > datetime.now(),
                )
            )
            record = result.first()
            if not record:
                return False
            record.is_verified = True
            await session.commit()
            await session.refresh(record)
            return True

    async def create_user_record(self, email: str) -> str:
        """
        创建用户记录
        :param email: 邮箱
        :return: 创建用户记录的唯一标识
        """
        async with rx.asession() as session:
            result = await session.exec(
                select(UserRecord).where(UserRecord.email == email)
            )
            record = result.first()
            # 若记录已存在则返回用户唯一标识，否则创建并返回所创建记录的用户唯一标识
            if record:
                return record.id
            record = UserRecord(email=email)
            session.add(record)
            await session.commit()
            await session.refresh(record)
            return record.id

    async def get_conversations(self, user_id: str) -> Dict[str, Conversation]:
        """
        获取会话字典
        :param user_id: 用户唯一标识
        :return: 会话字典
        """
        records: Dict[str, Conversation] = {}
        async with rx.asession() as session:
            result = await session.exec(
                select(ConversationRecord, DialogRecord)
                .outerjoin(DialogRecord, ConversationRecord.id == DialogRecord.conversation_id)  # type: ignore
                .where(
                    ConversationRecord.user_id == user_id,
                    ConversationRecord.is_deleted == False,
                )
                .order_by(ConversationRecord.id, DialogRecord.id)
            )
            for conversation_record, dialog_record in result.all():
                record = records.setdefault(
                    conversation_record.id,
                    Conversation(
                        id=conversation_record.id,
                        description=conversation_record.description,
                        created_at=conversation_record.created_at,
                    ),
                )
                if not dialog_record:
                    continue
                record.dialogs.append(
                    Dialog(
                        id=dialog_record.id,
                        user_prompt=dialog_record.user_prompt,
                        thoughts=ThoughtTypeAdapter.validate_python(
                            dialog_record.thoughts
                        ),
                        result_output=dialog_record.result_output,
                    )
                )
        return records

    async def create_conversations_record(
        self, user_id: str, description: str = "新会话"
    ) -> Dict[str, Conversation]:
        """
        创建会话记录
        :param user_id: 用户唯一标识
        :param description: 会话描述，默认为"新会话"
        :return: 键为会话唯一标识，值为会话实例的会话字典
        """
        async with rx.asession() as session:
            record = ConversationRecord(user_id=user_id, description=description)
            session.add(record)
            await session.commit()
            await session.refresh(record)
        return {
            record.id: Conversation(
                id=record.id,
                description=record.description,
                created_at=record.created_at,
            )
        }

    async def delete_conversations_record(self, conversation_id: str) -> None:
        """
        逻辑删除会话记录（将会话已删除设置为 True）
        :param conversation_id: 指定会话唯一标识
        :return: None
        """
        async with rx.asession() as session:
            record = await session.get(ConversationRecord, conversation_id)
            if not record:
                return
            record.is_deleted = True
            await session.commit()

    async def create_dialogs_record(self, conversation_id: str, question: str) -> str:
        """
        创建对话记录
        :param conversation_id: 会话唯一标识
        :param question: 问题
        :return: 创建对话记录的唯一标识
        """
        async with rx.asession() as session:
            record = DialogRecord(
                conversation_id=conversation_id,
                user_prompt=question,
            )
            session.add(record)
            await session.commit()
            await session.refresh(record)
        return record.id

    async def update_dialog_record(
        self,
        dialog_id: str,
        thoughts: List[Thought],
        result_output: str,
    ) -> None:
        """
        更新对话记录
        :param dialog_id: 对话唯一标识
        :param thoughts: 思考列表
        :param result_output: 结果输出
        :return: None
        """
        async with rx.asession() as session:
            record = await session.get(DialogRecord, dialog_id)
            if not record:
                return
            record.thoughts = ThoughtTypeAdapter.dump_python(thoughts)
            record.result_output = result_output
            await session.commit()

    async def create_run_result_record(
        self,
        conversation_id: str,
        dialog_id: str,
        new_messages: List[ModelMessage],
    ) -> None:
        """
        创建运行结果记录
        :param conversation_id: 会话唯一标识
        :param dialog_id: 对话唯一标识
        :param new_messages: 新增消息
        :return: None
        """
        async with rx.asession() as session:
            session.add(
                RunResultRecord(
                    conversation_id=conversation_id,
                    dialog_id=dialog_id,
                    new_messages=ModelMessagesTypeAdapter.dump_json(
                        new_messages
                    ).decode(
                        "utf-8"
                    ),  # 序列化为 JSON 字符串
                )
            )
            await session.commit()

    async def retrieve_message_history(
        self, conversation_id: str
    ) -> List[ModelMessage]:
        """
        获取消息历史
        :param conversation_id: 会话唯一标识
        :return: 消息历史
        """
        records: List[ModelMessage] = []
        async with rx.asession() as session:
            result = await session.exec(
                select(RunResultRecord)
                .where(RunResultRecord.conversation_id == conversation_id)
                .order_by(desc(RunResultRecord.dialog_id))
            )
            for record in result.all():
                records.extend(
                    ModelMessagesTypeAdapter.validate_json(record.new_messages)
                )
        return records