from brewman.models.master import CostCentre
from fastapi import HTTPException, status


def validate(voucher):
    journals_valid(voucher)
    if voucher.type in [2, 3, 6]:
        inventory_valid(voucher)
        if voucher.id is None and voucher.type == 3:
            # Issue
            issue_new(voucher)
        if voucher.id is None and voucher.type == 6:
            # Purchase Return
            purchase_return_new(voucher)
        if voucher.id is not None and voucher.type == 3:
            # Issue
            issue_update(voucher)
        if voucher.id is not None and voucher.type == 6:
            # Purchase Return
            purchase_return_update(voucher)


def check_batch_insert(voucher):
    if voucher.type == 9:
        raise HTTPException(
            status_code=status.HTTP_410_GONE,
            detail="Verification Vouchers have been disabled",
        )
    if voucher.type == 6:
        # Purchase Return
        for item in voucher.inventories:
            batch = item.batch
            if batch.quantity_remaining < item.quantity:
                raise HTTPException(
                    status_code=status.HTTP_409_CONFLICT,
                    detail=f"Quantity of {item.product.name} ({item.product.units}) cannot be more than {batch.quantity_remaining}",
                )
    if voucher.type == 3:
        # Issue
        purchase = None
        for item in voucher.journals:
            if item.cost_centre_id == CostCentre.cost_centre_purchase():
                purchase = item
        if purchase is None:
            return
        if purchase.debit == 1:
            return
        for item in voucher.inventories:
            batch = item.batch
            if batch.quantity_remaining < item.quantity:
                raise HTTPException(
                    status_code=status.HTTP_409_CONFLICT,
                    detail=f"Quantity of {item.product.name} ({item.product.units}) cannot be more than {batch.quantity_remaining}",
                )
    if voucher.type == 2:
        # Purchase
        pass


def issue_new(voucher):
    consuming = filter(
        lambda x: x.cost_centre_id == CostCentre.cost_centre_purchase(),
        voucher.journals,
    )
    if not len(consuming):
        consuming = False
    elif consuming[0].debit == 1:
        consuming = False
    else:
        consuming = True

    if not consuming:
        return

    for item in voucher.inventories:
        batch = item.batch
        if batch.quantity_remaining < item.quantity:
            raise HTTPException(
                status_code=status.HTTP_409_CONFLICT,
                detail=f"Quantity of {item.product.name} ({item.product.units}) cannot be more than {batch.quantity_remaining}",
            )


def issue_update(voucher):
    consuming = filter(
        lambda x: x.cost_centre_id == CostCentre.cost_centre_purchase(),
        voucher.journals,
    )
    if not len(consuming):
        consuming = False
    elif consuming[0].debit == 1:
        consuming == False
    else:
        consuming == True

    if not consuming:
        return

    for item in voucher.inventories:
        batch = item.batch
        if batch.quantity_remaining < item.quantity:
            raise HTTPException(
                status_code=status.HTTP_409_CONFLICT,
                detail=f"Quantity of {item.product.name} ({item.product.units}) cannot be more than {batch.quantity_remaining}",
            )


def purchase_return_new(voucher):
    for item in voucher.inventories:
        batch = item.batch
        if batch.quantity_remaining < item.quantity:
            raise HTTPException(
                status_code=status.HTTP_409_CONFLICT,
                detail=f"Quantity of {item.product.name} ({item.product.units}) cannot be more than {batch.quantity_remaining}",
            )


def purchase_return_update(voucher):
    for item in voucher.inventories:
        batch = item.batch
        if batch.quantity_remaining < item.quantity:
            raise HTTPException(
                status_code=status.HTTP_409_CONFLICT,
                detail=f"Quantity of {item.product.name} ({item.product.units}) cannot be more than {batch.quantity_remaining}",
            )


def batch_valid(voucher):
    pass


def is_date_allowed(voucher):
    pass