from fastapi import APIRouter, Depends, HTTPException, Form
from sqlalchemy.orm import Session
from typing import Optional
from database import get_db
import models
from auth import require_admin

router = APIRouter(prefix="/api/manufacturers", tags=["manufacturers"])

def _fmt(m: models.Manufacturer) -> dict:
    return {
        "id": m.id, "name": m.name,
        "representative_name": m.representative_name,
        "business_number": m.business_number,
        "phone": m.phone, "address": m.address,
        "is_active": m.is_active,
        "created_at": m.created_at.isoformat() if m.created_at else None,
    }

@router.get("/public")
def list_public(db: Session = Depends(get_db)):
    """인증 없이 활성 제조사 목록 반환 (회원가입 화면용)"""
    rows = db.query(models.Manufacturer).filter_by(is_active=True).order_by(models.Manufacturer.name).all()
    return [{"id": m.id, "name": m.name} for m in rows]

@router.get("")
def list_manufacturers(db: Session = Depends(get_db), _=Depends(require_admin)):
    rows = db.query(models.Manufacturer).order_by(models.Manufacturer.name).all()
    return [_fmt(m) for m in rows]

@router.post("")
def create_manufacturer(
    name:                 str            = Form(...),
    representative_name:  str            = Form(""),
    business_number:      str            = Form(""),
    phone:                str            = Form(""),
    address:              str            = Form(""),
    db: Session = Depends(get_db),
    _=Depends(require_admin)
):
    if db.query(models.Manufacturer).filter_by(name=name).first():
        raise HTTPException(400, "이미 등록된 회사명입니다.")
    m = models.Manufacturer(
        name=name,
        representative_name=representative_name or None,
        business_number=business_number or None,
        phone=phone or None,
        address=address or None,
    )
    db.add(m); db.commit(); db.refresh(m)
    return _fmt(m)

@router.put("/{mfr_id}")
def update_manufacturer(
    mfr_id: int,
    name:                str = Form(...),
    representative_name: str = Form(""),
    business_number:     str = Form(""),
    phone:               str = Form(""),
    address:             str = Form(""),
    is_active:           str = Form("true"),
    db: Session = Depends(get_db),
    _=Depends(require_admin)
):
    m = db.query(models.Manufacturer).filter_by(id=mfr_id).first()
    if not m: raise HTTPException(404)
    dup = db.query(models.Manufacturer).filter(
        models.Manufacturer.name == name, models.Manufacturer.id != mfr_id
    ).first()
    if dup: raise HTTPException(400, "이미 사용 중인 회사명입니다.")
    m.name = name
    m.representative_name = representative_name or None
    m.business_number = business_number or None
    m.phone = phone or None
    m.address = address or None
    m.is_active = is_active == "true"
    db.commit()
    return _fmt(m)

@router.delete("/{mfr_id}")
def delete_manufacturer(mfr_id: int, db: Session = Depends(get_db), _=Depends(require_admin)):
    m = db.query(models.Manufacturer).filter_by(id=mfr_id).first()
    if not m: raise HTTPException(404)
    db.delete(m); db.commit()
    return {"ok": True}