// 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 functions

import (
	"strings"

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

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

// initReplace registers the functions to the catalog.
func initReplace() {
	framework.RegisterFunction(replace_text_text_text)
}

// replace_text_text_text represents the PostgreSQL function of the same name, taking the same parameters.
var replace_text_text_text = framework.Function3{
	Name:       "replace",
	Return:     pgtypes.Text,
	Parameters: [3]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text, pgtypes.Text},
	Strict:     true,
	Callable: func(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, str any, from any, to any) (any, error) {
		if len(from.(string)) == 0 {
			return str, nil
		}
		return strings.ReplaceAll(str.(string), from.(string), to.(string)), nil
	},
}