package integration

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

type ProcedureInterface interface {
	CreateProcedure(req model.ProcedureRequest) (map[string]interface{}, error)
	GetProcedure(id string) (map[string]interface{}, error)
	UpdateProcedure(req model.ProcedureRequest) (map[string]interface{}, error)
	GetProcedureByPatient(id string) (map[string]interface{}, error)
	HandleCheckProcedure(id string) ([]string, bool, error)
}

type ProcedureRepository struct {
	akses *model.Akses
}

// GetProcedureByPatient implements ProcedureInterface.
func (p *ProcedureRepository) GetProcedureByPatient(id string) (map[string]interface{}, error) {
	var data map[string]interface{}
	url := p.akses.BaseUrl + "/Procedure?subject=" + id
	method := "GET"

	client := &http.Client{}
	oauth := model.OauthRequest{
		ClientId:     p.akses.ClientId,
		ClientSecret: p.akses.ClientSecret,
	}
	OauthInterface := NewOauthRequestRepo(p.akses)
	token, err := OauthInterface.GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token == nil {
		return nil, errors.New(constant.ErrGenerateToken)
	}
	request, err := http.NewRequest(method, url, nil)
	if err != nil {
		return nil, err
	}
	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
}

// HandleCheckProcedure implements ProcedureInterface.
func (p *ProcedureRepository) HandleCheckProcedure(id string) ([]string, bool, error) {
	procedure, err := p.GetProcedureByPatient(id)
	if err != nil {
		return nil, false, err
	}
	var ids []string
	if entries, ok := procedure["entry"].([]interface{}); ok && len(entries) != 0 {
		if entries, ok := (procedure)["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
}

// CreateProcedure implements ProcedureInterface.
func (p *ProcedureRepository) CreateProcedure(req model.ProcedureRequest) (map[string]interface{}, error) {
	req.ResourceType = constant.ProcedureResourceType

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

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

	//Setup Performer
	err = p.setupPractitioner(&req)
	if err != nil {
		return nil, err
	}

	oauth := model.OauthRequest{
		ClientId:     p.akses.ClientId,
		ClientSecret: p.akses.ClientSecret,
	}

	token, err := NewOauthRequestRepo(p.akses).GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token == nil {
		return nil, errors.New(constant.ErrGenerateToken)
	}

	url := p.akses.BaseUrl + "/Procedure"

	return httputil.DoRequest(httputil.RequestOption{
		Method:      "POST",
		URL:         url,
		Body:        req,
		BearerToken: token.AccessToken,
	})
}

// GetProcedure implements ProcedureInterface.
func (p *ProcedureRepository) GetProcedure(id string) (map[string]interface{}, error) {
	panic("unimplemented")
}

// UpdateProcedure implements ProcedureInterface.
func (p *ProcedureRepository) UpdateProcedure(req model.ProcedureRequest) (map[string]interface{}, error) {
	patient, err := p.setupPatient(&req)
	if err != nil {
		return nil, err
	}

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

	//Setup Performer
	err = p.setupPractitioner(&req)
	if err != nil {
		return nil, err
	}

	oauth := model.OauthRequest{
		ClientId:     p.akses.ClientId,
		ClientSecret: p.akses.ClientSecret,
	}

	token, err := NewOauthRequestRepo(p.akses).GenerateToken(oauth)
	if err != nil {
		return nil, err
	}
	if token == nil {
		return nil, errors.New(constant.ErrGenerateToken)
	}

	url := p.akses.BaseUrl + "/Procedure/" + req.ID

	return httputil.DoRequest(httputil.RequestOption{
		Method:      "PUT",
		URL:         url,
		BearerToken: token.AccessToken,
		Body:        req,
	})
}

func (p *ProcedureRepository) setupPatient(req *model.ProcedureRequest) (string, error) {
	if req.Subject.Reference == "" {
		return "", nil
	}
	patientInterface := NewPatientRepo(p.akses)
	patient, err := patientInterface.HandleCheckPatient(req.Subject.Reference)
	if err != nil {
		return "", err
	}
	if patient != "" {
		req.Subject.Reference = "Patient/" + patient
	}
	return patient, nil
}

// setupEncounter extracts encounter setup logic from CreateDiagnosisReport.
func (p *ProcedureRepository) setupEncounter(req *model.ProcedureRequest, patient string) error {
	if patient == "" {
		return nil
	}
	encounterInterface := NewEncounterRepo(p.akses)
	encounterId, encounterExist, err := encounterInterface.HandleCheckEncounter(patient)
	if err != nil {
		return err
	}
	if encounterExist {
		req.Encounter.Reference = "Encounter/" + encounterId
	} else {
		//Buat dulu encounter
	}
	return nil
}

func (p *ProcedureRepository) setupPractitioner(req *model.ProcedureRequest) error {
	if len(req.Performer) == 0 {
		return nil
	}

	for _, performer := range req.Performer {
		if strings.Contains(performer.Actor.Reference, "Practitioner/") {
			temp := strings.Split(performer.Actor.Reference, "/")
			practicionerInterface := NewPracticionerRepo(p.akses)
			ref, _, err := practicionerInterface.HandleCheckPartitioner(temp[1])
			if err != nil {
				return err
			}
			if ref != "" {
				performer.Actor.Reference = "Practitioner/" + ref
			}
		}
	}
	return nil
}

func NewProcedureRepo(akses *model.Akses) ProcedureInterface {
	return &ProcedureRepository{
		akses: akses,
	}
}