/*
 * SPDX-FileCopyrightText: 2023 jordi fita mas <jfita@peritasoft.com>
 * SPDX-License-Identifier: AGPL-3.0-only
 */

package database

import (
	"context"

	"github.com/jackc/pgtype"
	"github.com/jackc/pgx/v4"
)

const (
	OptionUnitsTypeName         = "option_units"
	RedsysRequestTypeName       = "redsys_request"
	RedsysResponseTypeName      = "redsys_response"
	RedsysSignedRequestTypeName = "redsys_signed_request"
)

var (
	oidCache = make(map[string]uint32)
)

func registerTypes(ctx context.Context, connString string) error {
	conn, err := pgx.Connect(ctx, connString)
	if err != nil {
		return err
	}
	defer conn.Close(context.Background())

	if _, err := conn.Exec(ctx, "set role to guest"); err != nil {
		return err
	}
	if _, err := conn.Exec(ctx, searchPathQuery); err != nil {
		return err
	}
	if err := registerConnectionTypes(ctx, conn); err != nil {
		return err
	}
	return nil
}

func registerConnectionTypes(ctx context.Context, conn *pgx.Conn) error {
	uriOID, err := registerType(ctx, conn, &pgtype.Text{}, "uri")
	if err != nil {
		return err
	}

	redsysRequestType, err := pgtype.NewCompositeType(
		RedsysRequestTypeName,
		[]pgtype.CompositeTypeField{
			{"transaction_type", pgtype.Int4OID},
			{"amount", pgtype.TextOID},
			{"order_number", pgtype.TextOID},
			{"product", pgtype.TextOID},
			{"card_holder", pgtype.TextOID},
			{"success_uri", uriOID},
			{"failure_uri", uriOID},
			{"notification_uri", uriOID},
			{"lang_tag", pgtype.TextOID},
		},
		conn.ConnInfo(),
	)
	if err != nil {
		return err
	}
	if _, err = registerType(ctx, conn, redsysRequestType, redsysRequestType.TypeName()); err != nil {
		return err
	}

	redsysResponseType, err := pgtype.NewCompositeType(
		RedsysResponseTypeName,
		[]pgtype.CompositeTypeField{
			{"merchant_code", pgtype.TextOID},
			{"terminal_number", pgtype.Int4OID},
			{"response_code", pgtype.Int4OID},
			{"date_time", pgtype.TimestampOID},
			{"secure_payment", pgtype.BoolOID},
			{"transaction_type", pgtype.Int4OID},
			{"amount", pgtype.TextOID},
			{"currency_code", pgtype.TextOID},
			{"order_number", pgtype.TextOID},
			{"authorization_code", pgtype.TextOID},
			{"error_code", pgtype.TextOID},
		},
		conn.ConnInfo(),
	)
	if err != nil {
		return err
	}
	if _, err = registerType(ctx, conn, redsysResponseType, redsysResponseType.TypeName()); err != nil {
		return err
	}

	redsysSignedRequestType, err := pgtype.NewCompositeType(
		RedsysSignedRequestTypeName,
		[]pgtype.CompositeTypeField{
			{"merchant_parameters", pgtype.TextOID},
			{"signature", pgtype.TextOID},
			{"signature_version", pgtype.TextOID},
		},
		conn.ConnInfo(),
	)
	if err != nil {
		return err
	}
	if _, err = registerType(ctx, conn, redsysSignedRequestType, redsysSignedRequestType.TypeName()); err != nil {
		return err
	}

	optionUnitsType, err := pgtype.NewCompositeType(
		OptionUnitsTypeName,
		[]pgtype.CompositeTypeField{
			{"option_id", pgtype.Int4OID},
			{"units", pgtype.Int4OID},
		},
		conn.ConnInfo(),
	)
	if err != nil {
		return err
	}
	if _, err = registerType(ctx, conn, optionUnitsType, optionUnitsType.TypeName()); err != nil {
		return err
	}

	return nil
}

func registerType(ctx context.Context, conn *pgx.Conn, value pgtype.Value, name string) (oid uint32, err error) {
	var found bool
	if oid, found = oidCache[name]; !found {
		if err = conn.QueryRow(ctx, "select $1::regtype::oid", name).Scan(&oid); err != nil {
			return
		}
		oidCache[name] = oid
	}
	conn.ConnInfo().RegisterDataType(pgtype.DataType{Value: value, Name: name, OID: oid})
	return
}