from typing import Any, List, Optional

from fastapi import APIRouter, Depends, HTTPException, Query, status
from sqlalchemy.orm import Session

from app import crud, schemas
from app.database.session import get_db

router = APIRouter()


@router.get(
    "/",
    response_model=List[schemas.Item],
    status_code=status.HTTP_200_OK,
    summary="Get all items",
    description="Retrieve all items with pagination, filtering, and search options",
)
def read_items(
    db: Session = Depends(get_db),
    query: Optional[str] = Query(None, description="Search text in name and description"),
    active: Optional[bool] = Query(None, description="Filter by active status"),
    price_min: Optional[int] = Query(None, description="Minimum price in cents"),
    price_max: Optional[int] = Query(None, description="Maximum price in cents"),
    skip: int = Query(0, description="Number of records to skip"),
    limit: int = Query(100, description="Maximum number of records to return"),
) -> Any:
    """
    Retrieve items with support for:
    - Text search in name and description
    - Filtering by active status
    - Price range filtering
    - Pagination with skip and limit parameters
    """
    # If search query or price filters are provided, use search method
    if query is not None or price_min is not None or price_max is not None:
        items = crud.item.search(
            db, 
            query=query or "", 
            skip=skip, 
            limit=limit,
            active=active,
            price_min=price_min,
            price_max=price_max
        )
    # Otherwise use existing methods
    elif active is not None:
        items = crud.item.get_multi_by_active(db, active=active, skip=skip, limit=limit)
    else:
        items = crud.item.get_multi(db, skip=skip, limit=limit)
    
    return items


@router.get(
    "/search",
    response_model=List[schemas.Item],
    status_code=status.HTTP_200_OK,
    summary="Search items",
    description="Search for items by query text in name and description with additional filters",
)
def search_items(
    query: str = Query(..., description="Search text in name and description"),
    db: Session = Depends(get_db),
    active: Optional[bool] = Query(None, description="Filter by active status"),
    price_min: Optional[int] = Query(None, description="Minimum price in cents"),
    price_max: Optional[int] = Query(None, description="Maximum price in cents"),
    skip: int = Query(0, description="Number of records to skip"),
    limit: int = Query(100, description="Maximum number of records to return"),
) -> Any:
    """
    Search for items with support for:
    - Text search in name and description (required)
    - Filtering by active status
    - Price range filtering
    - Pagination with skip and limit parameters
    """
    items = crud.item.search(
        db, 
        query=query, 
        skip=skip, 
        limit=limit,
        active=active,
        price_min=price_min,
        price_max=price_max
    )
    return items


@router.get(
    "/{item_id}",
    response_model=schemas.Item,
    status_code=status.HTTP_200_OK,
    summary="Get an item by ID",
    description="Get a specific item by its ID",
)
def read_item(
    *,
    db: Session = Depends(get_db),
    item_id: int,
) -> Any:
    """
    Get an item by ID.
    """
    item = crud.item.get(db=db, id=item_id)
    if not item:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Item not found",
        )
    return item


@router.post(
    "/",
    response_model=schemas.Item,
    status_code=status.HTTP_201_CREATED,
    summary="Create a new item",
    description="Create a new item with the provided data",
)
def create_item(
    *,
    db: Session = Depends(get_db),
    item_in: schemas.ItemCreate,
) -> Any:
    """
    Create a new item.
    """
    item = crud.item.get_by_name(db=db, name=item_in.name)
    if item:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"An item with the name '{item_in.name}' already exists",
        )
    item = crud.item.create(db=db, obj_in=item_in)
    return item


@router.put(
    "/{item_id}",
    response_model=schemas.Item,
    status_code=status.HTTP_200_OK,
    summary="Update an item",
    description="Update an item with the provided data",
)
def update_item(
    *,
    db: Session = Depends(get_db),
    item_id: int,
    item_in: schemas.ItemUpdate,
) -> Any:
    """
    Update an item.
    """
    item = crud.item.get(db=db, id=item_id)
    if not item:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Item not found",
        )
    item = crud.item.update(db=db, db_obj=item, obj_in=item_in)
    return item


@router.delete(
    "/{item_id}",
    status_code=status.HTTP_204_NO_CONTENT,
    response_model=None,
    summary="Delete an item",
    description="Delete an item by its ID",
)
def delete_item(
    *,
    db: Session = Depends(get_db),
    item_id: int,
) -> None:
    """
    Delete an item.
    """
    item = crud.item.get(db=db, id=item_id)
    if not item:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="Item not found",
        )
    crud.item.remove(db=db, id=item_id)
    return None