"""
联系人服务 — CRUD (V5.0)
"""
from __future__ import annotations

import uuid
from sqlalchemy import select, func, and_
from sqlalchemy.ext.asyncio import AsyncSession

from app.models.crm import CrmContact


async def list_contacts(
    db: AsyncSession,
    customer_id: uuid.UUID,
) -> list[dict]:
    """列出某客户下所有未删除的联系人"""
    stmt = (
        select(CrmContact)
        .where(
            CrmContact.customer_id == customer_id,
            CrmContact.is_deleted.is_(False),
        )
        .order_by(CrmContact.created_at)
    )
    rows = (await db.execute(stmt)).scalars().all()
    return [_to_dict(c) for c in rows]


async def create_contact(
    db: AsyncSession,
    customer_id: uuid.UUID,
    data: dict,
) -> dict:
    """新增联系人"""
    contact = CrmContact(
        customer_id=customer_id,
        name=data["name"],
        phone=data.get("phone"),
        title=data.get("title"),
    )
    db.add(contact)
    await db.commit()
    await db.refresh(contact)
    return _to_dict(contact)


async def update_contact(
    db: AsyncSession,
    contact_id: uuid.UUID,
    data: dict,
) -> dict:
    """编辑联系人"""
    contact = await db.get(CrmContact, contact_id)
    if not contact or contact.is_deleted:
        raise ValueError("联系人不存在")
    for field in ("name", "phone", "title"):
        if field in data:
            setattr(contact, field, data[field])
    await db.commit()
    await db.refresh(contact)
    return _to_dict(contact)


async def delete_contact(
    db: AsyncSession,
    contact_id: uuid.UUID,
) -> None:
    """软删除联系人"""
    contact = await db.get(CrmContact, contact_id)
    if not contact or contact.is_deleted:
        raise ValueError("联系人不存在")
    contact.is_deleted = True
    await db.commit()


def _to_dict(c: CrmContact) -> dict:
    return {
        "id": str(c.id),
        "customer_id": str(c.customer_id),
        "name": c.name,
        "phone": c.phone,
        "title": c.title,
        "ai_buyer_persona": c.ai_buyer_persona or {},
        "created_at": c.created_at.isoformat() if c.created_at else None,
        "updated_at": c.updated_at.isoformat() if c.updated_at else None,
    }