package eligibilityroute

import (
	"encoding/xml"
	"fmt"
	"html"
	"strings"
	"sync"

	"bitbucket.org/nemt/nemt-portal-api/application/applicationservice"
	"bitbucket.org/nemt/nemt-portal-api/application/third/eligibility/bcbsi"
	"bitbucket.org/nemt/nemt-portal-api/application/viewmodel"
	"bitbucket.org/nemt/nemt-portal-api/infra/config"
	"bitbucket.org/nemt/nemt-portal-api/server/router/routeutils"
	"github.com/labstack/echo"
)

var (
	instance *controller
	once     sync.Once
)

type controller struct {
	cfg   *config.Config
	svc   *applicationservice.Service
	bcbsi *bcbsi.Service
}

func controllerInstance(cfg *config.Config, svc *applicationservice.Service) *controller {
	once.Do(func() {
		instance = &controller{
			cfg:   cfg,
			svc:   svc,
			bcbsi: bcbsi.New(cfg),
		}
	})
	return instance
}

func (c *controller) handleEligibility(ctx echo.Context) error {
	var eligibility viewmodel.Eligibility

	if err := ctx.Bind(&eligibility); err != nil {
		return routeutils.HandleAPIError(ctx, err)
	}

	ret, err := c.bcbsi.BXE.CheckEligibility(eligibility)
	if err != nil {
		fmt.Println("Error Here: ", err.Error())
		return routeutils.HandleAPIError(ctx, err)
	}

	if ret.QueryResult.HIPPA271.T271 != "" {
		xmlString := html.UnescapeString(ret.QueryResult.HIPPA271.T271)
		xmlReader := strings.NewReader(xmlString)

		var f viewmodel.Interchange271
		err = xml.NewDecoder(xmlReader).Decode(&f)
		if err != nil {
			fmt.Println("Error to unmarshal: ", err.Error())
		}

		return ctx.JSON(200, f)
	} else {
		return routeutils.ResponseAPIOK(ctx, ret)
	}
}