package application

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"image/png"
	"log"
	"net/http"
	"strconv"
	"strings"
	"time"

	formvalidators "git.coopgo.io/coopgo-apps/parcoursmob/utils/form-validators"
	"git.coopgo.io/coopgo-apps/parcoursmob/utils/identification"
	profilepictures "git.coopgo.io/coopgo-apps/parcoursmob/utils/profile-pictures"
	fleets "git.coopgo.io/coopgo-platform/fleets/grpcapi"
	groupsmanagement "git.coopgo.io/coopgo-platform/groups-management/grpcapi"
	"git.coopgo.io/coopgo-platform/groups-management/storage"
	mobilityaccounts "git.coopgo.io/coopgo-platform/mobility-accounts/grpcapi"
	"github.com/google/uuid"
	"github.com/gorilla/mux"
	"google.golang.org/protobuf/types/known/structpb"
)

type BeneficiariesForm struct {
	FirstName   string     `json:"first_name" validate:"required"`
	LastName    string     `json:"last_name" validate:"required"`
	Email       string     `json:"email" validate:"required,email"`
	Birthdate   *time.Time `json:"birthdate"`
	PhoneNumber string     `json:"phone_number" validate:"required,phoneNumber"`
	Address     any        `json:"address,omitempty"`
	Gender      string     `json:"gender"`
}

func (h *ApplicationHandler) BeneficiariesList(w http.ResponseWriter, r *http.Request) {

	accounts, err := h.beneficiaries(r)
	if err != nil {
		fmt.Println(err)
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	cacheid := uuid.NewString()
	h.cache.PutWithTTL(cacheid, accounts, 1*time.Hour)

	h.Renderer.BeneficiariesList(w, r, accounts, cacheid)
}

func (h *ApplicationHandler) BeneficiaryCreate(w http.ResponseWriter, r *http.Request) {
	g := r.Context().Value(identification.GroupKey)
	if g == nil {
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	group := g.(storage.Group)
	fmt.Println(group)

	if r.Method == "POST" {

		dataMap, err := parseBeneficiariesForm(r)
		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusBadRequest)
			return
		}

		data, err := structpb.NewValue(dataMap)
		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		request := &mobilityaccounts.RegisterRequest{
			Account: &mobilityaccounts.Account{
				Namespace: "parcoursmob_beneficiaries",
				Data:      data.GetStructValue(),
			},
		}

		resp, err := h.services.GRPC.MobilityAccounts.Register(context.TODO(), request)

		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		subscribe := &groupsmanagement.SubscribeRequest{
			Groupid:  group.ID,
			Memberid: resp.Account.Id,
		}

		_, err = h.services.GRPC.GroupsManagement.Subscribe(context.TODO(), subscribe)

		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		http.Redirect(w, r, fmt.Sprintf("/app/beneficiaries/%s", resp.Account.Id), http.StatusFound)

		return
	}
	h.Renderer.BeneficiaryCreate(w, r)
}

func (h *ApplicationHandler) BeneficiaryDisplay(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	beneficiaryID := vars["beneficiaryid"]

	request := &mobilityaccounts.GetAccountRequest{
		Id: beneficiaryID,
	}

	resp, err := h.services.GRPC.MobilityAccounts.GetAccount(context.TODO(), request)
	if err != nil {
		fmt.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	//TODO filter namespaces
	//TODO filter groups

	bookingsrequest := &fleets.GetDriverBookingsRequest{
		Driver: beneficiaryID,
	}
	bookingsresp, err := h.services.GRPC.Fleets.GetDriverBookings(context.TODO(), bookingsrequest)
	if err != nil {
		fmt.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	bookings := []any{}

	for _, b := range bookingsresp.Bookings {
		bookings = append(bookings, b.ToStorageType())
	}

	h.Renderer.BeneficiaryDisplay(w, r, resp.Account.ToStorageType(), bookings)
}

func (h *ApplicationHandler) BeneficiaryUpdate(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	beneficiaryID := vars["beneficiaryid"]

	if r.Method == "POST" {

		dataMap, err := parseBeneficiariesForm(r)
		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusBadRequest)
			return
		}

		data, err := structpb.NewValue(dataMap)
		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		request := &mobilityaccounts.UpdateDataRequest{
			Account: &mobilityaccounts.Account{
				Id:        beneficiaryID,
				Namespace: "parcoursmob_beneficiaries",
				Data:      data.GetStructValue(),
			},
		}

		resp, err := h.services.GRPC.MobilityAccounts.UpdateData(context.TODO(), request)

		if err != nil {
			fmt.Println(err)
			w.WriteHeader(http.StatusInternalServerError)
			return
		}

		http.Redirect(w, r, fmt.Sprintf("/app/beneficiaries/%s", resp.Account.Id), http.StatusFound)

		return
	}

	request := &mobilityaccounts.GetAccountRequest{
		Id: beneficiaryID,
	}

	resp, err := h.services.GRPC.MobilityAccounts.GetAccount(context.TODO(), request)
	if err != nil {
		fmt.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	//TODO filter namespaces
	//TODO filter groups

	h.Renderer.BeneficiaryUpdate(w, r, resp.Account.ToStorageType())
}

func (h *ApplicationHandler) BeneficiaryPicture(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	beneficiaryID := vars["beneficiaryid"]

	request := &mobilityaccounts.GetAccountRequest{
		Id: beneficiaryID,
	}

	resp, err := h.services.GRPC.MobilityAccounts.GetAccount(context.TODO(), request)
	if err != nil {
		fmt.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	account := resp.Account.ToStorageType()

	firstName := account.Data["first_name"].(string)
	lastName := account.Data["last_name"].(string)
	picture := profilepictures.DefaultProfilePicture(strings.ToUpper(firstName[0:1] + lastName[0:1]))

	buffer := new(bytes.Buffer)
	if err := png.Encode(buffer, picture); err != nil {
		log.Println("unable to encode image.")
	}

	w.Header().Set("Content-Type", "image/png")
	w.Header().Set("Content-Length", strconv.Itoa(len(buffer.Bytes())))
	if _, err := w.Write(buffer.Bytes()); err != nil {
		log.Println("unable to write image.")
	}
}

func filterAccount(r *http.Request, a *mobilityaccounts.Account) bool {
	searchFilter, ok := r.URL.Query()["search"]

	if ok && len(searchFilter[0]) > 0 {
		name := a.Data.AsMap()["first_name"].(string) + " " + a.Data.AsMap()["last_name"].(string)
		if !strings.Contains(strings.ToLower(name), strings.ToLower(searchFilter[0])) {
			return false
		}
	}

	return true
}

func (h *ApplicationHandler) beneficiaries(r *http.Request) ([]any, error) {
	var accounts = []any{}
	g := r.Context().Value(identification.GroupKey)
	if g == nil {
		return accounts, errors.New("no group provided")
	}

	group := g.(storage.Group)

	request := &mobilityaccounts.GetAccountsBatchRequest{
		Accountids: group.Members,
	}

	resp, err := h.services.GRPC.MobilityAccounts.GetAccountsBatch(context.TODO(), request)
	if err != nil {
		return accounts, err
	}

	for _, account := range resp.Accounts {
		if filterAccount(r, account) {
			a := account.ToStorageType()
			accounts = append(accounts, a)
		}
	}

	return accounts, err
}

func parseBeneficiariesForm(r *http.Request) (map[string]any, error) {
	if err := r.ParseForm(); err != nil {
		return nil, err
	}

	var date *time.Time

	if r.PostFormValue("birthdate") != "" {
		d, err := time.Parse("2006-01-02", r.PostFormValue("birthdate"))
		if err != nil {
			return nil, err
		}
		date = &d
	}

	formData := BeneficiariesForm{
		FirstName:   r.PostFormValue("first_name"),
		LastName:    r.PostFormValue("last_name"),
		Email:       r.PostFormValue("email"),
		Birthdate:   date,
		PhoneNumber: r.PostFormValue("phone_number"),
		Gender:      r.PostFormValue("gender"),
	}

	if r.PostFormValue("address") != "" {
		var a any
		json.Unmarshal([]byte(r.PostFormValue("address")), &a)

		formData.Address = a
	}

	validate := formvalidators.New()
	if err := validate.Struct(formData); err != nil {
		return nil, err
	}

	d, err := json.Marshal(formData)
	if err != nil {
		return nil, err
	}

	var dataMap map[string]any
	err = json.Unmarshal(d, &dataMap)
	if err != nil {
		return nil, err
	}

	return dataMap, nil
}