/* openbills - Server for web based Libre Billing Software
 * Copyright (C) 2023-2024  Vidhu Kant Sharma <vidhukant@vidhukant.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package customer

import (
	"strings"
	"vidhukant.com/openbills/errors"
	u "vidhukant.com/openbills/util"
)

func (c *Customer) validate() error {
	// trim whitespaces
	c.FirmName = strings.TrimSpace(c.FirmName)
	c.Gstin = strings.TrimSpace(c.Gstin)
	c.ContactName = strings.TrimSpace(c.ContactName)
	c.Phone = strings.TrimSpace(c.Phone)
	c.Email = strings.TrimSpace(c.Email)
	c.Website = strings.TrimSpace(c.Website)

	// don't validate if GSTIN is empty
	if c.Gstin != "" {
		if !u.ValidateGstin(c.Gstin) {
			return errors.ErrInvalidGSTIN
		}
	}

	// don't validate email if empty
	if c.Email != "" {
		if !u.ValidateEmail(c.Email) {
			return errors.ErrInvalidEmail
		}
	}

	// don't validate phone if empty
	if c.Phone != "" {
		if !u.ValidatePhone(c.Phone) {
			return errors.ErrInvalidPhone
		}
	}

	// don't validate website if empty
	if c.Website != "" {
		if !u.ValidateWebsite(c.Website) {
			return errors.ErrInvalidWebsite
		}
	}

	return nil
}