package integration

import (
	"bytes"
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"satusehat-rssa/internal/constant"
	"satusehat-rssa/internal/model"
	"satusehat-rssa/pkg/httputil"
)

type ServiceRequestInterface interface {
	CreateServiceRequest(req model.ServiceRequest) (map[string]interface{}, error)
	GetServiceRequestByPatient(id string) (map[string]interface{}, error)
	GetServiceRequestByPatientCategory(id string, category string) (map[string]interface{}, error)
	HandleCheckServiceRequest(id string) ([]string, bool, error)
	HandleCheckServiceRequestByCategory(id string, category string) ([]string, bool, error)
	UpdateServiceRequest(req model.ServiceRequest) (map[string]interface{}, error)
}

type ServiceRequestRepository struct {
	akses *model.Akses
}

// GetServiceRequestByPatientCategory implements ServiceRequestInterface.
func (s *ServiceRequestRepository) GetServiceRequestByPatientCategory(id string, category string) (map[string]interface{}, error) {
	var data map[string]interface{}
	url := s.akses.BaseUrl + "/ServiceRequest?subject=" + id + "&category=" + category
	method := "GET"
	client := &http.Client{}
	request, err := http.NewRequest(method, url, nil)
	if err != nil {
		return nil, err
	}
	oauth := model.OauthRequest{
		ClientId:     s.akses.ClientId,
		ClientSecret: s.akses.ClientSecret,
	}
	OauthInterface := NewOauthRequestRepo(s.akses)
	token, err := OauthInterface.GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token != nil {
		request.Header.Set("Authorization", "Bearer "+token.AccessToken)
	}
	request.Header.Set("Content-Type", constant.ContentTypeFHIRJSON)
	res, err := client.Do(request)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	err = json.NewDecoder(res.Body).Decode(&data)
	if err != nil {
		return nil, err
	}
	return data, nil
}

// HandleCheckServiceRequestByCategory implements ServiceRequestInterface.
func (s *ServiceRequestRepository) HandleCheckServiceRequestByCategory(id string, category string) ([]string, bool, error) {
	servicereq, err := s.GetServiceRequestByPatientCategory(id, category)
	if err != nil {
		return nil, false, err
	}
	var ids []string
	if entries, ok := servicereq["entry"].([]interface{}); ok && len(entries) != 0 {
		if entries, ok := (servicereq)["entry"].([]interface{}); ok && len(entries) > 0 {
			if entryMap, ok := entries[0].(map[string]interface{}); ok {
				if resource, ok := entryMap["resource"].(map[string]interface{}); ok {
					if id, ok := resource["id"].(string); ok {
						//fmt.Println("resource.id:", id)
						ids = append(ids, id)
						return ids, true, nil
					}
				}
			}
		}
		return nil, true, nil
	}

	return nil, false, nil
}

// CreateServiceRequest implements ServiceRequestInterface.
func (s *ServiceRequestRepository) CreateServiceRequest(req model.ServiceRequest) (map[string]interface{}, error) {
	var data map[string]interface{}

	req.ResourceType = constant.ServiceRequestResourceType
	// Setup Patient
	var patient string
	if req.Subject.Reference != "" {
		patientInterface := NewPatientRepo(s.akses)
		var err error
		patient, err = patientInterface.HandleCheckPatient(req.Subject.Reference)
		if err != nil {
			return nil, err
		}

		if patient == "" { // Belum ada di satu sehat
			return nil, errors.New("patient not found")
		} else {
			req.Subject.Reference = "Patient/" + patient
		}
	}

	// Setup Encounter
	if patient != "" {
		encounterInterface := NewEncounterRepo(s.akses)
		encounterId, encounterExist, err := encounterInterface.HandleCheckEncounter(patient)
		if err != nil {
			return nil, err
		}

		if encounterExist {
			req.Encounter.Reference = "Encounter/" + encounterId
		} else {
			return nil, errors.New("encounter not found")
		}
	}

	url := s.akses.BaseUrl + "/ServiceRequest"
	method := "POST"
	payload, err := json.Marshal(req)
	if err != nil {
		return nil, err
	}
	client := &http.Client{}
	request, err := http.NewRequest(method, url, bytes.NewBuffer(payload))
	if err != nil {
		return nil, err
	}
	oauth := model.OauthRequest{
		ClientId:     s.akses.ClientId,
		ClientSecret: s.akses.ClientSecret,
	}
	OauthInterface := NewOauthRequestRepo(s.akses)
	token, err := OauthInterface.GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token != nil {
		request.Header.Set("Authorization", "Bearer "+token.AccessToken)
	}
	request.Header.Set("Content-Type", constant.ContentTypeFHIRJSON)
	res, err := client.Do(request)

	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	err = json.NewDecoder(res.Body).Decode(&data)
	if err != nil {
		return nil, err
	}

	return data, nil

}

func (s *ServiceRequestRepository) UpdateServiceRequest(req model.ServiceRequest) (map[string]interface{}, error) {
	req.ResourceType = constant.ServiceRequestResourceType
	// Setup Patient
	var patient string
	if req.Subject.Reference != "" {
		patientInterface := NewPatientRepo(s.akses)
		var err error
		patient, err = patientInterface.HandleCheckPatient(req.Subject.Reference)
		if err != nil {
			return nil, err
		}

		if patient == "" { // Belum ada di satu sehat
			return nil, errors.New("patient not found")
		} else {
			req.Subject.Reference = "Patient/" + patient
		}
	}

	// Setup Encounter
	if patient != "" {
		encounterInterface := NewEncounterRepo(s.akses)
		encounterId, encounterExist, err := encounterInterface.HandleCheckEncounter(patient)
		if err != nil {
			return nil, err
		}

		if encounterExist {
			req.Encounter.Reference = "Encounter/" + encounterId
		} else {
			return nil, errors.New("encounter not found")
		}
	}

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

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

}

// GetServiceRequestByPatient implements ServiceRequestInterface.
func (s *ServiceRequestRepository) GetServiceRequestByPatient(id string) (map[string]interface{}, error) {
	var data map[string]interface{}
	url := s.akses.BaseUrl + "/ServiceRequest?subject=" + id
	method := "GET"
	client := &http.Client{}
	request, err := http.NewRequest(method, url, nil)
	if err != nil {
		return nil, err
	}
	oauth := model.OauthRequest{
		ClientId:     s.akses.ClientId,
		ClientSecret: s.akses.ClientSecret,
	}
	OauthInterface := NewOauthRequestRepo(s.akses)
	token, err := OauthInterface.GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token != nil {
		request.Header.Set("Authorization", "Bearer "+token.AccessToken)
	}
	request.Header.Set("Content-Type", constant.ContentTypeFHIRJSON)
	res, err := client.Do(request)

	if err != nil {
		return nil, err
	}
	defer res.Body.Close()

	err = json.NewDecoder(res.Body).Decode(&data)
	if err != nil {
		return nil, err
	}

	return data, nil

}

// HandleCheckServiceRequest implements ServiceRequestInterface.
func (s *ServiceRequestRepository) HandleCheckServiceRequest(id string) ([]string, bool, error) {
	servicereq, err := s.GetServiceRequestByPatient(id)
	if err != nil {
		return nil, false, err
	}

	var ids []string
	if entries, ok := servicereq["entry"].([]interface{}); ok && len(entries) != 0 {
		if entries, ok := (servicereq)["entry"].([]interface{}); ok && len(entries) > 0 {
			if entryMap, ok := entries[0].(map[string]interface{}); ok {
				if resource, ok := entryMap["resource"].(map[string]interface{}); ok {
					if id, ok := resource["id"].(string); ok {
						//fmt.Println("resource.id:", id)
						ids = append(ids, id)
						return ids, true, nil
					}
				}
			}
		}
		return nil, true, nil
	}

	return nil, false, nil
}

func NewServiceRequestRepository(akses *model.Akses) ServiceRequestInterface {
	return &ServiceRequestRepository{akses: akses}
}