#' Piirkonnale andmebaasides olevate punktide teisendamine
#'
#' Etteantud piirkonna geomeetrilise piirjoone ('piir') ja selle joone piirikasti ('bb') järele leitakse nende aladega kaetud punktid. Andmed salvestatakse GPKG faili kihtidena.
#'
#' @param obj str Objekti nimi. Edaspidi on oluline ainult see nimi. Piirkonna geomeetrilist joont ei ole vaja lisada.
#' @param gpkg_home path Salvestatavate GPKG faili asukoht.
#' @return Uute GPKG andmebaasi kihtide 'piir_...' ja 'bb_...' loomine.
#' @seealso [sf::st_read()], [sf::write_sf()],[sf::st_transform()],[ruut::gpkg_piirkonnale_ruudustike_lisamine()] ,[ruut::gpkg_piirkonnale_polygoonide_lisamine()],[ruut::gpkg_sellest_alustame_gpkg_loomist()],[ruut::gpkg_piirkonnale_joonte_lisamine()],[ruut::gpkg_piirkonnale_punktide_lisamine()],[ruut::gpkg_piirkonnale_punktide_lisamine()],[ruut::gpkg_teisendame_polygoone()],[ruut::gpkg_teisendame_jooni()],[ruut::gpkg_teisendame_punkte()]
#' @keywords GPKG, boundary box, EPSG:3301
#' @export
#' @examples
#' \dontrun{
#'
#' gpkg_home <- "/tmp"
#' obj <- "marja"
#' gpkg_teisendame_punkte(obj = obj, gpkg_home = gpkg_home)
#'
#' # Layers list.
#' dsn <- sprintf("%s/%s.gpkg", gpkg_home, obj)
#' sf::st_layers(dsn = dsn)
#' }
gpkg_teisendame_punkte <- function(obj = NULL, gpkg_home = "/tmp") {
  dsn <- sprintf("%s/%s.gpkg", gpkg_home, obj)
  if (!file.exists(dsn)) {
    cat(sprintf("\nSellist faili \"%s\" ei leitud.\n", dsn))
    return(NULL)
  }
  ## Konfiguratsiooni muutujale väärtuste omistamine
  conf <- ruut::get_config()
  tmp_gpkg_file <- tempfile(fileext = ".gpkg")
  conf$gpkg_home <- dirname(tmp_gpkg_file)
  conf$gpkg_file <- gsub(paste0(conf$gpkg_home, "/"), "", tmp_gpkg_file)
  conf$gpkg_file <- gsub(".gpkg", "", conf$gpkg_file)

  conf$gpkg_home <- gpkg_home
  conf$gpkg_file <- obj
  tmp_gpkg_file_output <- ruut::construct_to_gpkg_output_file_str(conf = conf, is_input_str = F)
  tmp_gpkg_file_input <- ruut::construct_to_gpkg_output_file_str(conf = conf, is_input_str = T)

  ## ====================== teisendused =====================
  # Layers list
  gpkg_info <- sf::st_layers(dsn = dsn)
  layer_names <- gpkg_info$name
  layer_names <- layer_names[!layer_names %in% c("bb2", "bb2_epk10t_grid", "bb2_epk02t_grid", "bb2_epk2t_grid")] # c("bb", "bb2", "bb_epk10t_grid", "bb_epk02t_grid", "bb_epk2t_grid", "bb_epk10t", "bb_epk02t")]
  for (layer_name in layer_names) {
    ruumiline_obj <- sf::read_sf(dsn = dsn, layer = layer_name)
    ## ------------- Punktide arv ruudus ---------------
    ## Kontlrollime kas geomeetriline objekt on punkt.
    (is_point <- any(grepl("point", tolower(attributes(ruumiline_obj$geom)$class), fixed = TRUE)))
    if (is_point) {
      # ruut::qgis_algorithm_search_by_word("Count")
      algorithm <- "native:countpointsinpolygon"
      conf$gpkg_table <- sprintf("%s_epk02t", layer_name)
      output <- ruut::construct_to_gpkg_output_file_str(conf = conf, geometry_field = "geom", is_input_str = F)
      conf$gpkg_table <- sprintf("%s", layer_name)
      points <- ruut::construct_to_gpkg_output_file_str(conf = conf, geometry_field = "geom", is_input_str = T)
      conf$gpkg_table <- sprintf("%s", "bb2_epk02t_grid")
      polygons <- ruut::construct_to_gpkg_output_file_str(conf = conf, geometry_field = "geom", is_input_str = T)
      str <- sprintf("{ 'CLASSFIELD' : '', 'FIELD' : 'numpoints', 'OUTPUT' : '%s', 'POINTS' : '%s', 'POLYGONS' : '%s', 'WEIGHT' : '' }", output, points, polygons)
      cmd <- ruut::construct_qgis_output_result_to_better_format(str = str, algorithm = algorithm)
      system(cmd)
      ## ------------- TIFF ----------------
      grid_layer <- sf::read_sf(dsn = dsn, layer = "bb2_epk02t_grid")
      # sf::st_crs(grid_layer) <- 3301
      pk_attributes <- attributes(grid_layer$geom)
      extent <- sprintf("%s,%s,%s,%s [EPSG:3301]", round((pk_attributes$bbox["xmin"] / 100), digits = 0) * 100, ceiling((pk_attributes$bbox["xmax"] / 100)) * 100, round((pk_attributes$bbox["ymin"] / 100), digits = 0) * 100, ceiling((pk_attributes$bbox["ymax"] / 100)) * 100)
      # ruut::qgis_algorithm_search_by_word("Rasterize")
      algorithm <- "gdal:rasterize"
      ruut::qgis_show_help(algorithm = algorithm)
      conf$gpkg_table <- sprintf("%s_epk02t", layer_name)
      input <- ruut::construct_to_gpkg_output_file_str(conf = conf, geometry_field = "geom", is_input_str = T)
      output <- sprintf("%s/tif/%s.tif", conf$gpkg_home, layer_name)
      str <- sprintf(
        "{ 'BURN' : 0, 'DATA_TYPE' : 5, 'EXTENT' : '%s', 'EXTRA' : '-a_srs epsg:3301', 'FIELD' : 'numpoints', 'HEIGHT' : 100, 'INIT' : None, 'INPUT' : '%s', 'INVERT' : False, 'NODATA' : -1, 'OPTIONS' : '', 'OUTPUT' : '%s', 'UNITS' : 1, 'WIDTH' : 100 }",
        extent, input, output
      )
      cmd <- ruut::construct_qgis_output_result_to_better_format(str = str, algorithm = algorithm)
      system(cmd)

      ## ----------- TIF TO POSTGIS -------------
      conf$schema <- conf$gpkg_file
      ruut::db_create_new_schema(conf = conf)
      (cmd <- sprintf("export PGPASSWORD=%s && raster2pgsql -I %s %s.%s_tif | psql -U %s -d %s -h %s -p %s",
                      conf$password, output, conf$schema, layer_name, conf$user, conf$dbname, conf$host, conf$port))
      system(cmd)
    }
  }
  ## Layers list
  sf::st_layers(dsn = dsn)
}