import uuid

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.context_file import ContextFile

DEFAULT_SYSTEM_PROMPT = """You are a personal AI health assistant. Your role is to:
- Help users understand their health data and medical documents
- Provide health-related recommendations based on uploaded information
- Schedule reminders for checkups, medications, and health-related activities
- Compile health summaries when requested
- Answer health questions clearly and compassionately

Always be empathetic, accurate, and clear. When uncertain, recommend consulting a healthcare professional.
You can communicate in English and Russian based on the user's preference."""


async def get_primary_context(db: AsyncSession) -> ContextFile | None:
    result = await db.execute(
        select(ContextFile).where(ContextFile.type == "primary", ContextFile.user_id.is_(None))
    )
    return result.scalar_one_or_none()


async def get_personal_context(db: AsyncSession, user_id: uuid.UUID) -> ContextFile | None:
    result = await db.execute(
        select(ContextFile).where(ContextFile.type == "personal", ContextFile.user_id == user_id)
    )
    return result.scalar_one_or_none()


async def upsert_personal_context(
    db: AsyncSession, user_id: uuid.UUID, content: str
) -> ContextFile:
    ctx = await get_personal_context(db, user_id)
    if ctx:
        ctx.content = content
        ctx.version = ctx.version + 1
        ctx.updated_by = user_id
    else:
        ctx = ContextFile(
            type="personal",
            user_id=user_id,
            content=content,
            version=1,
            updated_by=user_id,
        )
        db.add(ctx)
    await db.flush()
    return ctx


async def upsert_primary_context(
    db: AsyncSession, content: str, admin_user_id: uuid.UUID
) -> ContextFile:
    ctx = await get_primary_context(db)
    if ctx:
        ctx.content = content
        ctx.version = ctx.version + 1
        ctx.updated_by = admin_user_id
    else:
        ctx = ContextFile(
            type="primary",
            user_id=None,
            content=content,
            version=1,
            updated_by=admin_user_id,
        )
        db.add(ctx)
    await db.flush()
    return ctx