#' Teeregistri WFS kihitidest uute andmete moodustamine
#'
#' 1. Põhi-, kõrval ja tugimaanteedest ning rambid moodustatakse uus andmebaas 'riigiteedevork'.
#' Eesti avaandmete \url{https://avaandmed.eesti.ee/datasets?emsId=35} teabevärava kaudu teederegistri WFS (Web Feature Service) andmete eksportimine postgisandmebaasi. WFS andmestiku kirjeldus: \url{https://teeregister-api.mnt.ee/teenus/wfs?request=GetCapabilities&service=WFS}
#'
#' @param conf A list() of configuration variables. Default values \code{\link[ruut]{get_config}}.
#' @return No output.
#' @seealso [ruut::get_config()], [ruut::copy_shp_to_db()], [estmap::teeregister_wfs()]
#' @keywords postgis, maps, WFS, OSM
#' @export
#' @examples
#' \dontrun{
#'
#' conf <- ruut::get_config()
#' teeregister_wfs_muutmine(conf = conf)
#' }
teeregister_wfs_muutmine <- function(conf = NULL) {
  ## ------------- muutujad ja teisendused ---------------
  if (is.null(conf)) {
    conf <- ruut::get_config()
    conf$schema <- "teeregister_wfs"
  }
  # ## Teeregistri avaandmete kihtide lugemine
  # wfs_list <- loe_teeregistri_wfs_kihid()
  # layer_list <- wfs_list[, "layer"]
  # layer_list <- tolower(gsub("ms:", "", layer_list))
  ## Loe instaleeritud tabelid andmebaasis
  installed_tables <- ruut::db_schema_tablenames(conf = conf)

  ## Kontrollime ühendatavate andmebaaside olemasolu.
  if (all(c("pohimaantee", "ramp", "tugimaantee", "korvalmaantee") %in% installed_tables)) {

    ## 1. --------- Ühendame riigiteed üheks võrgustikuks --------------
    # ruut::qgis_algorithm_search_by_word("merge")
    algorithm <- "native:mergevectorlayers"
    # ruut::qgis_show_help(algorithm = algorithm)
    conf$table <- "pohimaantee"
    layer_1 <- ruut::construct_to_gpkg_output_postgres_str(
      conf = conf, geometry_type = "MultiLineString", srid = 3301,
      checkPrimaryKeyUnicity = TRUE, key = "id", geometry_field = "geometry"
    )
    conf$table <- "ramp"
    layer_2 <- ruut::construct_to_gpkg_output_postgres_str(
      conf = conf, geometry_type = "MultiLineString", srid = 3301,
      checkPrimaryKeyUnicity = TRUE, key = "id", geometry_field = "geometry"
    )
    conf$table <- "tugimaantee"
    layer_3 <- ruut::construct_to_gpkg_output_postgres_str(
      conf = conf, geometry_type = "MultiLineString", srid = 3301,
      checkPrimaryKeyUnicity = TRUE, key = "id", geometry_field = "geometry"
    )
    conf$table <- "korvalmaantee"
    layer_4 <- ruut::construct_to_gpkg_output_postgres_str(
      conf = conf, geometry_type = "MultiLineString", srid = 3301,
      checkPrimaryKeyUnicity = TRUE, key = "id", geometry_field = "geometry"
    )
    conf$table <- "riigiteedevork"
    output <- ruut::construct_to_gpkg_output_postgres_str(conf = conf, geometry_field = "geometry", geometry_type = "MultiLineString", srid = 3301, checkPrimaryKeyUnicity = FALSE, key = "fid")
    cmd <- sprintf(
      "qgis_process run native:mergevectorlayers --CRS='epsg:3301' --LAYERS='%s' --LAYERS='%s' --LAYERS='%s' --LAYERS='%s' --OUTPUT='%s' ",
      layer_1, layer_2, layer_3, layer_4, output
    )
    system(cmd)

    cat(sprintf("\n%s\n-------------\n", "Loodi teedev\U00F5rgu andmebaas 'riigiteedevork'."))
  }
}