// Statping
// Copyright (C) 2018.  Hunter Long and the project contributors
// Written by Hunter Long <info@socialeck.com> and the project contributors
//
// https://github.com/hunterlong/statping
//
// The licenses for most software and other practical works are designed
// to take away your freedom to share and change the works.  By contrast,
// the GNU General Public License is intended to guarantee your freedom to
// share and change all versions of a program--to make sure it remains free
// software for all its users.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package integrators

import (
	"bytes"
	"encoding/csv"
	"errors"
	"fmt"
	"github.com/hunterlong/statping/types/integrations"
	"github.com/hunterlong/statping/types/null"
	"github.com/hunterlong/statping/types/services"
	"github.com/hunterlong/statping/utils"
	"strconv"
	"time"
)

const requiredSize = 17

type csvIntegration struct {
	*integrations.Integration
}

var CsvIntegrator = &csvIntegration{&integrations.Integration{
	ShortName:   "csv",
	Name:        "CSV File",
	Icon:        "<i class=\"fas fa-file-csv\"></i>",
	Description: "Import multiple services from a CSV file. Please have your CSV file formatted with the correct amount of columns based on the <a href=\"https://raw.githubusercontent.com/hunterlong/statping/master/source/tmpl/bulk_import.csv\">example file on Github</a>.",
	Fields: []*integrations.IntegrationField{
		{
			Name:        "input",
			Type:        "textarea",
			Description: "",
		},
	},
}}

var csvData [][]string

func (t *csvIntegration) Get() *integrations.Integration {
	return t.Integration
}

func (t *csvIntegration) List() ([]*services.Service, error) {
	data := Value(t, "input").(string)
	buf := bytes.NewReader([]byte(data))
	r := csv.NewReader(buf)
	records, err := r.ReadAll()
	if err != nil {
		return nil, err
	}

	var services []*services.Service
	for k, v := range records[1:] {
		s, err := commaToService(v)
		if err != nil {
			log.Errorf("error on line %v: %v", k, err)
			continue
		}
		services = append(services, s)
	}
	return services, nil
}

// commaToService will convert a CSV comma delimited string slice to a Service type
// this function is used for the bulk import services feature
func commaToService(s []string) (*services.Service, error) {
	if len(s) != requiredSize {
		err := fmt.Errorf("file has %v columns of data, not the expected amount of %v columns for a service", len(s), requiredSize)
		return nil, err
	}

	interval, err := time.ParseDuration(s[4])
	if err != nil {
		return nil, errors.New("could not parse internal duration: " + s[4])
	}

	timeout, err := time.ParseDuration(s[9])
	if err != nil {
		return nil, errors.New("could not parse timeout duration: " + s[9])
	}

	allowNotifications, err := strconv.ParseBool(s[11])
	if err != nil {
		return nil, errors.New("could not parse allow notifications boolean: " + s[11])
	}

	public, err := strconv.ParseBool(s[12])
	if err != nil {
		return nil, errors.New("could not parse public boolean: " + s[12])
	}

	verifySsl, err := strconv.ParseBool(s[16])
	if err != nil {
		return nil, errors.New("could not parse verifiy SSL boolean: " + s[16])
	}

	newService := &services.Service{
		Name:               s[0],
		Domain:             s[1],
		Expected:           null.NewNullString(s[2]),
		ExpectedStatus:     int(utils.ToInt(s[3])),
		Interval:           int(utils.ToInt(interval.Seconds())),
		Type:               s[5],
		Method:             s[6],
		PostData:           null.NewNullString(s[7]),
		Port:               int(utils.ToInt(s[8])),
		Timeout:            int(utils.ToInt(timeout.Seconds())),
		AllowNotifications: null.NewNullBool(allowNotifications),
		Public:             null.NewNullBool(public),
		GroupId:            int(utils.ToInt(s[13])),
		Headers:            null.NewNullString(s[14]),
		Permalink:          null.NewNullString(s[15]),
		VerifySSL:          null.NewNullBool(verifySsl),
	}

	return newService, nil

}