from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy import select
from sqlalchemy.orm import Session
from .shared import site_config
from ..auth import create_customer_token, require_customer
from ..database import get_db
from ..models import Customer, Lead
from ..schemas import LeadCreateIn, PhoneLoginIn
from ..wechat import WechatApiError, WechatConfigError, exchange_phone_code


router = APIRouter()


def mask_phone(phone: str) -> str:
    normalized = phone.strip()
    if len(normalized) <= 7:
        return "***"
    return f"{normalized[:3]}****{normalized[-4:]}"


def public_customer_dict(customer: Customer) -> dict:
    return {"id": customer.id, "phoneMasked": mask_phone(customer.phone)}


@router.get("/health")
def health():
    return {"ok": True, "service": "miniapp-api"}


@router.get("/api/public/site-config")
def get_site_config(db: Session = Depends(get_db)):
    return site_config(db, active_only=True)


@router.post("/api/public/auth/phone-login")
def phone_login(body: PhoneLoginIn, db: Session = Depends(get_db)):
    try:
        phone = exchange_phone_code(body.code)
    except WechatConfigError as exc:
        raise HTTPException(status_code=status.HTTP_503_SERVICE_UNAVAILABLE, detail=str(exc)) from exc
    except WechatApiError as exc:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc

    customer = db.scalar(select(Customer).where(Customer.phone == phone))
    if not customer:
        customer = Customer(phone=phone)
        db.add(customer)
        db.flush()
    db.commit()
    db.refresh(customer)
    return {"token": create_customer_token(customer), "customer": public_customer_dict(customer)}


@router.get("/api/public/auth/me")
def current_customer(customer: Customer = Depends(require_customer)):
    return public_customer_dict(customer)


@router.post("/api/public/leads", status_code=status.HTTP_201_CREATED)
def create_lead(body: LeadCreateIn, db: Session = Depends(get_db)):
    lead = Lead(**body.model_dump(exclude_none=True), status="new")
    db.add(lead)
    db.commit()
    db.refresh(lead)
    return {"id": lead.id, "status": lead.status}