from typing import Any, Dict

from core.database import get_core_db
from core.security import get_current_user, has_role
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy import or_
from sqlalchemy.orm import Session

from .dto import LicenseExceptionDTO
from .models import LicenseException
from ..rbac import require_ref_view

router = APIRouter(prefix="/license-exceptions")


@router.get(
    "/",
    response_model=Dict[str, Any],
    dependencies=[Depends(require_ref_view("ref_pedimento_regimens.view"))],
)
async def list_license_exceptions(
    page: int = Query(1, ge=1, description="Número de página"),
    page_size: int = Query(50, ge=1, le=1000, description="Tamaño de página"),
    q: str = Query(None, description="Búsqueda general"),
    search: str = Query(None, description="Término de búsqueda"),
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    skip = (page - 1) * page_size
    query = db.query(LicenseException)
    
    if search:
        search_filter = f"%{search}%"
        query = query.filter(
            or_(
                LicenseException.key.ilike(search_filter),
                LicenseException.description.ilike(search_filter)
            )
        )
    
    if q:
        search_term = f"%{q}%"
        query = query.filter(
            or_(
                LicenseException.key.ilike(search_term),
                LicenseException.description.ilike(search_term)
            )
        )
    
    items = query.offset(skip).limit(page_size).all()
    total = query.count()
    return {
        "items": [LicenseExceptionDTO.model_validate(obj) for obj in items],
        "total": total,
        "page": page,
        "page_size": page_size,
    }


@router.get(
    "/{key}",
    response_model=LicenseExceptionDTO,
    dependencies=[Depends(require_ref_view("ref_pedimento_regimens.view"))],
)
async def get_license_exception(
    key: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(get_current_user),
):
    obj = db.query(LicenseException).filter(LicenseException.key == key).first()
    if not obj:
        raise HTTPException(status_code=404, detail="Not found")
    return obj


@router.post("/", response_model=LicenseExceptionDTO, status_code=201)
async def create_license_exception(
    data: LicenseExceptionDTO,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(has_role("admin")),
):
    # Check if already exists
    existing = db.query(LicenseException).filter(LicenseException.key == data.key).first()
    if existing:
        raise HTTPException(status_code=400, detail="License exception with this key already exists")
    
    obj = LicenseException(**data.dict())
    db.add(obj)
    db.commit()
    db.refresh(obj)
    return obj


@router.put("/{key}", response_model=LicenseExceptionDTO)
async def update_license_exception(
    key: str,
    data: LicenseExceptionDTO,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(has_role("admin")),
):
    obj = db.query(LicenseException).filter(LicenseException.key == key).first()
    if not obj:
        raise HTTPException(status_code=404, detail="Not found")
    for field, value in data.dict().items():
        setattr(obj, field, value)
    db.commit()
    db.refresh(obj)
    return obj


@router.delete("/{key}", status_code=204)
async def delete_license_exception(
    key: str,
    db: Session = Depends(get_core_db),
    current_user: dict = Depends(has_role("admin")),
):
    obj = db.query(LicenseException).filter(LicenseException.key == key).first()
    if not obj:
        raise HTTPException(status_code=404, detail="Not found")
    db.delete(obj)
    db.commit()
    return None
