package databag

import (
  "strconv"
  "net/http"
  "databag/internal/store"
)

func GetGroups(w http.ResponseWriter, r *http.Request) {
  var groupRevisionSet bool
  var groupRevision int64

  account, code, err := BearerAppToken(r, false);
  if err != nil {
    ErrResponse(w, code, err)
    return
  }

  group := r.FormValue("revision")
  if group != "" {
    groupRevisionSet = true
    if groupRevision, err = strconv.ParseInt(group, 10, 64); err != nil {
      ErrResponse(w, http.StatusBadRequest, err)
      return
    }
  }

  var slots []store.GroupSlot
  if groupRevisionSet {
    if err := store.DB.Preload("Group.GroupData").Where("account_id = ? AND revision > ?", account.ID, groupRevision).Find(&slots).Error; err != nil {
      ErrResponse(w, http.StatusInternalServerError, err)
      return
    }
  } else {
    if err := store.DB.Preload("Group.GroupData").Where("account_id = ? AND group_id != 0", account.ID).Find(&slots).Error; err != nil {
      ErrResponse(w, http.StatusInternalServerError, err)
      return
    }
  }

  var response []*Group
  for _, slot := range slots {
    response = append(response, getGroupModel(&slot))
  }

  w.Header().Set("Group-Revision", strconv.FormatInt(account.GroupRevision, 10))
  WriteResponse(w, response)
}