from fastapi import APIRouter, HTTPException, Query

from app.service.models import Transaction
from app.service.recon_service import (
    FlagType,
    StatusType,
    add_transaction,
    delete_transaction_by_id,
    get_transaction_by_id,
    list_transactions,
)

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


@router.get(
    "/transactions", response_model=list[Transaction], summary="List transactions"
)
async def list_transactions_endpoint(
    status: StatusType | None = Query(None, description="Filter by status"),
    flag: FlagType | None = Query(None, description="Filter by flag"),
) -> list[Transaction]:
    return list_transactions(status=status, flag=flag)


@router.get(
    "/transactions/{transaction_id}",
    response_model=Transaction,
    summary="Get a transaction",
)
async def get_transaction_endpoint(transaction_id: str) -> Transaction:
    transaction = get_transaction_by_id(transaction_id)
    if transaction is None:
        raise HTTPException(status_code=404, detail=f"{transaction_id} not found")
    return transaction


@router.post(
    "/transactions",
    response_model=Transaction,
    status_code=201,
    summary="Submit a transaction",
)
async def create_transaction_endpoint(transaction: Transaction) -> Transaction:
    created = add_transaction(transaction)
    if not created:
        raise HTTPException(
            status_code=409, detail=f"{transaction.transaction_id} already exists"
        )
    return transaction


@router.delete(
    "/transactions/{transaction_id}", status_code=204, summary="Delete a transaction"
)
async def delete_transaction_endpoint(transaction_id: str) -> None:
    removed = delete_transaction_by_id(transaction_id)
    if not removed:
        raise HTTPException(status_code=404, detail=f"{transaction_id} not found")