package application

import (
	"context"
	"encoding/json"
	"fmt"
	"sort"
	"strings"
	"time"

	groupsmanagement "git.coopgo.io/coopgo-platform/groups-management/grpcapi"
	groupstorage "git.coopgo.io/coopgo-platform/groups-management/storage"
	mobilityaccounts "git.coopgo.io/coopgo-platform/mobility-accounts/grpcapi"
	mobilityaccountsstorage "git.coopgo.io/coopgo-platform/mobility-accounts/storage"
	"github.com/google/uuid"
	"github.com/rs/zerolog/log"
	"google.golang.org/protobuf/types/known/structpb"
)

type GroupsResult struct {
	Groups []groupstorage.Group
}

type CreateGroupModuleResult struct {
	GroupID string
}

type GroupModuleCreateDataResult struct {
	GroupTypes []string
}

type DisplayGroupModuleResult struct {
	GroupID              string
	Accounts             []any
	CacheID              string
	Searched             bool
	Beneficiary          any
	Group                groupstorage.Group
	AccountsBeneficiaire []mobilityaccountsstorage.Account
}

var Addres any

type BeneficiariesGroupForm 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"`
}

type GroupsModuleByName []groupstorage.Group

func (a GroupsModuleByName) Len() int { return len(a) }
func (a GroupsModuleByName) Less(i, j int) bool {
	return strings.Compare(a[i].Data["name"].(string), a[j].Data["name"].(string)) < 0
}
func (a GroupsModuleByName) Swap(i, j int) { a[i], a[j] = a[j], a[i] }

func (h *ApplicationHandler) GetGroups(ctx context.Context) (*GroupsResult, error) {
	request := &groupsmanagement.GetGroupsRequest{
		Namespaces: []string{"parcoursmob_groups"},
	}

	resp, err := h.services.GRPC.GroupsManagement.GetGroups(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to get groups: %w", err)
	}

	var groups = []groupstorage.Group{}

	for _, group := range resp.Groups {
		g := group.ToStorageType()
		groups = append(groups, g)
	}

	sort.Sort(GroupsModuleByName(groups))

	return &GroupsResult{
		Groups: groups,
	}, nil
}

func (h *ApplicationHandler) GetGroupModuleCreateData(ctx context.Context) (*GroupModuleCreateDataResult, error) {
	groupTypes := h.config.GetStringSlice("modules.groups.group_types")
	return &GroupModuleCreateDataResult{
		GroupTypes: groupTypes,
	}, nil
}

func (h *ApplicationHandler) CreateGroupModule(ctx context.Context, name, groupType, description, address string) (*CreateGroupModuleResult, error) {
	if name == "" {
		return nil, fmt.Errorf("name is required")
	}
	if groupType == "" {
		return nil, fmt.Errorf("type is required")
	}

	var addressData any
	if address != "" {
		if err := json.Unmarshal([]byte(address), &addressData); err != nil {
			return nil, fmt.Errorf("failed to parse address: %w", err)
		}
		Addres = addressData
	}

	groupID := uuid.NewString()

	dataMap := map[string]any{
		"name":        name,
		"type":        groupType,
		"description": description,
		"address":     Addres,
	}

	data, err := structpb.NewValue(dataMap)
	if err != nil {
		return nil, fmt.Errorf("failed to create data structure: %w", err)
	}

	request := &groupsmanagement.AddGroupRequest{
		Group: &groupsmanagement.Group{
			Id:        groupID,
			Namespace: "parcoursmob_groups",
			Data:      data.GetStructValue(),
		},
	}

	_, err = h.services.GRPC.GroupsManagement.AddGroup(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to add group: %w", err)
	}

	return &CreateGroupModuleResult{
		GroupID: groupID,
	}, nil
}

func filterAccountBySearch(searchFilter string, a *mobilityaccounts.Account) bool {
	if searchFilter != "" {
		name := a.Data.AsMap()["first_name"].(string) + " " + a.Data.AsMap()["last_name"].(string)
		if !strings.Contains(strings.ToLower(name), strings.ToLower(searchFilter)) {
			return false
		}
	}
	return true
}
func (h *ApplicationHandler) DisplayGroupModule(ctx context.Context, groupID string, searchFilter string, currentUserGroup groupstorage.Group) (*DisplayGroupModuleResult, error) {
	request := &groupsmanagement.GetGroupRequest{
		Id: groupID,
	}

	resp, err := h.services.GRPC.GroupsManagement.GetGroup(ctx, request)
	if err != nil {
		return nil, fmt.Errorf("failed to get group: %w", err)
	}

	var accounts = []any{}

	accountsRequest := &mobilityaccounts.GetAccountsBatchRequest{
		Accountids: resp.Group.Members,
	}

	accountsResp, err := h.services.GRPC.MobilityAccounts.GetAccountsBatch(ctx, accountsRequest)
	if err != nil {
		log.Warn().Err(err).Msg("failed to get accounts batch")
	} else {
		for _, account := range accountsResp.Accounts {
			if filterAccountBySearch(searchFilter, account) {
				a := account.ToStorageType()
				accounts = append(accounts, a)
			}
		}
	}

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

	// Get beneficiaries in current user's group
	accountsBeneficiaire, err := h.services.GetBeneficiariesInGroup(currentUserGroup)
	if err != nil {
		return nil, fmt.Errorf("failed to get beneficiaries in group: %w", err)
	}

	return &DisplayGroupModuleResult{
		GroupID:              resp.Group.ToStorageType().ID,
		Accounts:             accounts,
		CacheID:              cacheID,
		Searched:             false,
		Beneficiary:          nil,
		Group:                resp.Group.ToStorageType(),
		AccountsBeneficiaire: accountsBeneficiaire,
	}, nil
}

func (h *ApplicationHandler) SubscribeBeneficiaryToGroup(ctx context.Context, groupID string, beneficiaryID string) error {
	beneficiaryRequest := &mobilityaccounts.GetAccountRequest{
		Id: beneficiaryID,
	}

	beneficiaryResp, err := h.services.GRPC.MobilityAccounts.GetAccount(ctx, beneficiaryRequest)
	if err != nil {
		return fmt.Errorf("failed to get beneficiary: %w", err)
	}

	subscribe := &groupsmanagement.SubscribeRequest{
		Groupid:  groupID,
		Memberid: beneficiaryResp.Account.Id,
	}

	_, err = h.services.GRPC.GroupsManagement.Subscribe(ctx, subscribe)
	if err != nil {
		return fmt.Errorf("failed to subscribe beneficiary to group: %w", err)
	}

	return nil
}