package integration

import (
	"errors"
	"fmt"
	"satusehat-rssa/internal/constant"
	"satusehat-rssa/internal/model"
	"satusehat-rssa/pkg/httputil"
)

type ImmunizationInterface interface {
	// Define methods for ImmunizationInterface
	CreateImmunization(req model.ImmunizationRequest) (map[string]interface{}, error)
	UpdateImmunization(req model.ImmunizationRequest) (map[string]interface{}, error)
}

type ImmunizationRepository struct {
	// Define fields for ImmunizationRepository
	akses *model.Akses
}

func NewImmunizationRepo(akses *model.Akses) ImmunizationInterface {
	return &ImmunizationRepository{
		akses: akses,
	}
}

// CreateImmunization implements ImmunizationInterface.
func (c *ImmunizationRepository) CreateImmunization(req model.ImmunizationRequest) (map[string]interface{}, error) {
	req.ResourceType = constant.ImmunizationResourceType
	//setup primarySource default true karena vaksin bersumber dari orang yg melakukan vaksin
	req.PrimarySource = true

	patient, err := c.setupPatient(&req)
	if err != nil {
		return nil, err
	}

	err = c.setupEncounter(&req, patient)
	if err != nil {
		return nil, err
	}

	oauth := model.OauthRequest{
		ClientId:     c.akses.ClientId,
		ClientSecret: c.akses.ClientSecret,
	}
	token, err := NewOauthRequestRepo(c.akses).GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token == nil {
		return nil, errors.New(constant.ErrGenerateToken)
	}

	url := c.akses.BaseUrl + "/Immunization"
	return httputil.DoRequest(httputil.RequestOption{
		Method:      "POST",
		URL:         url,
		Body:        req,
		BearerToken: token.AccessToken,
		Headers:     httputil.DefaultFHIRHeaders(),
	})
}

func (c *ImmunizationRepository) UpdateImmunization(req model.ImmunizationRequest) (map[string]interface{}, error) {
	req.ResourceType = constant.ImmunizationResourceType

	patient, err := c.setupPatient(&req)
	if err != nil {
		return nil, err
	}

	err = c.setupEncounter(&req, patient)
	if err != nil {
		return nil, err
	}

	oauth := model.OauthRequest{
		ClientId:     c.akses.ClientId,
		ClientSecret: c.akses.ClientSecret,
	}
	token, err := NewOauthRequestRepo(c.akses).GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token == nil {
		return nil, errors.New(constant.ErrGenerateToken)
	}

	url := c.akses.BaseUrl + fmt.Sprintf("/Immunization/%s", req.Id)
	return httputil.DoRequest(httputil.RequestOption{
		Method:      "PUT",
		URL:         url,
		Body:        req,
		BearerToken: token.AccessToken,
		Headers:     httputil.DefaultFHIRHeaders(),
	})
}

func (c *ImmunizationRepository) setupPatient(req *model.ImmunizationRequest) (string, error) {
	if req.Patient.Reference == "" {
		return "", nil
	}
	patientInterface := NewPatientRepo(c.akses)
	patient, err := patientInterface.HandleCheckPatient(req.Patient.Reference)
	if err != nil {
		return "", err
	}

	if patient != "" {
		req.Patient.Reference = "Patient/" + patient
	}
	return patient, nil
}

func (c *ImmunizationRepository) setupEncounter(req *model.ImmunizationRequest, patient string) error {
	if patient == "" {
		return nil
	}
	encounterInterface := NewEncounterRepo(c.akses)
	encounterId, encounterExist, err := encounterInterface.HandleCheckEncounter(patient)
	if err != nil {
		return err
	}
	if encounterExist {
		req.Encounter.Reference = "Encounter/" + encounterId
	}
	return nil
}