// Copyright 2024 Dolthub, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package binary

import (
	"github.com/dolthub/go-mysql-server/sql"

	"github.com/dolthub/doltgresql/server/functions/framework"
	pgtypes "github.com/dolthub/doltgresql/server/types"
)

// These functions can be gathered using the following query from a Postgres 15 instance:
// SELECT * FROM pg_operator o WHERE o.oprname = '&' ORDER BY o.oprcode::varchar;

// initBinaryBitAnd registers the functions to the catalog.
func initBinaryBitAnd() {
	framework.RegisterBinaryFunction(framework.Operator_BinaryBitAnd, int2and)
	framework.RegisterBinaryFunction(framework.Operator_BinaryBitAnd, int4and)
	framework.RegisterBinaryFunction(framework.Operator_BinaryBitAnd, int8and)
}

// int2and_callable is the callable logic for the int2and function.
func int2and_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
	return int16(val1.(int16) & val2.(int16)), nil
}

// int2and represents the PostgreSQL function of the same name, taking the same parameters.
var int2and = framework.Function2{
	Name:       "int2and",
	Return:     pgtypes.Int16,
	Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int16, pgtypes.Int16},
	Strict:     true,
	Callable:   int2and_callable,
}

// int4and_callable is the callable logic for the int4and function.
func int4and_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
	return int32(val1.(int32) & val2.(int32)), nil
}

// int4and represents the PostgreSQL function of the same name, taking the same parameters.
var int4and = framework.Function2{
	Name:       "int4and",
	Return:     pgtypes.Int32,
	Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int32, pgtypes.Int32},
	Strict:     true,
	Callable:   int4and_callable,
}

// int8and_callable is the callable logic for the int8and function.
func int8and_callable(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
	return int64(val1.(int64) & val2.(int64)), nil
}

// int8and represents the PostgreSQL function of the same name, taking the same parameters.
var int8and = framework.Function2{
	Name:       "int8and",
	Return:     pgtypes.Int64,
	Parameters: [2]*pgtypes.DoltgresType{pgtypes.Int64, pgtypes.Int64},
	Strict:     true,
	Callable:   int8and_callable,
}