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

from app.database import get_db
from app.schemas import EntityResponse, InventoryTreeNode, ListResponse, NodeContext, Relation
from app.services.inventory import build_inventory_tree, build_node_context, get_badges, get_node_relations

router = APIRouter(prefix='/inventory', tags=['inventory'])


@router.get('/tree', response_model=ListResponse[InventoryTreeNode])
def inventory_tree(
    root_id: str | None = None,
    depth: int | None = Query(default=None, ge=0),
    db: Session = Depends(get_db),
):
    items = build_inventory_tree(db, root_id=root_id, depth=depth)
    return ListResponse(count=len(items), items=items)


@router.get('/tree/{item_id}', response_model=EntityResponse[InventoryTreeNode])
def inventory_subtree(
    item_id: str,
    depth: int | None = Query(default=None, ge=0),
    db: Session = Depends(get_db),
):
    items = build_inventory_tree(db, root_id=item_id, depth=depth)
    if not items:
        raise HTTPException(status_code=404, detail='Inventory node not found')
    return EntityResponse(item=items[0])


@router.get('/nodes/{item_id}/context', response_model=EntityResponse[NodeContext])
def node_context(item_id: str, db: Session = Depends(get_db)):
    item = build_node_context(db, item_id)
    if not item:
        raise HTTPException(status_code=404, detail='Inventory node not found')
    return EntityResponse(item=item)


@router.get('/nodes/{item_id}/badges', response_model=ListResponse[str])
def node_badges(item_id: str, db: Session = Depends(get_db)):
    badges = get_badges(db, item_id)
    return ListResponse(count=len(badges), items=badges)


@router.get('/nodes/{item_id}/relations', response_model=ListResponse[Relation])
def node_relations(
    item_id: str,
    layer: str | None = None,
    type: str | None = Query(default=None),
    direction: str = Query(default='both', pattern='^(incoming|outgoing|both)$'),
    db: Session = Depends(get_db),
):
    items = get_node_relations(db, item_id, layer=layer, rel_type=type, direction=direction)
    return ListResponse(count=len(items), items=items)