// VulcanizeDB
// Copyright © 2019 Vulcanize

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.

// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package postgres

import (
	"fmt"
)

// Env variables
const (
	DATABASE_NAME                 = "DATABASE_NAME"
	DATABASE_HOSTNAME             = "DATABASE_HOSTNAME"
	DATABASE_PORT                 = "DATABASE_PORT"
	DATABASE_USER                 = "DATABASE_USER"
	DATABASE_PASSWORD             = "DATABASE_PASSWORD"
	DATABASE_MAX_IDLE_CONNECTIONS = "DATABASE_MAX_IDLE_CONNECTIONS"
	DATABASE_MAX_OPEN_CONNECTIONS = "DATABASE_MAX_OPEN_CONNECTIONS"
	DATABASE_MAX_CONN_LIFETIME    = "DATABASE_MAX_CONN_LIFETIME"
)

type ConnectionParams struct {
	Hostname string
	Name     string
	User     string
	Password string
	Port     int
}

type ConnectionConfig struct {
	MaxIdle     int
	MaxOpen     int
	MaxLifetime int
}

func DbConnectionString(params ConnectionParams) string {
	if len(params.User) > 0 && len(params.Password) > 0 {
		return fmt.Sprintf("postgresql://%s:%s@%s:%d/%s?sslmode=disable",
			params.User, params.Password, params.Hostname, params.Port, params.Name)
	}
	if len(params.User) > 0 && len(params.Password) == 0 {
		return fmt.Sprintf("postgresql://%s@%s:%d/%s?sslmode=disable",
			params.User, params.Hostname, params.Port, params.Name)
	}
	return fmt.Sprintf("postgresql://%s:%d/%s?sslmode=disable", params.Hostname, params.Port, params.Name)
}