#' Piirkonna polügoonide lisamine
#'
#' Etteantud piirkonna geomeetrilise piirjoone ('piir') järele leitakse selles piirkonnas ja piirkonna piiriga piirnevad polügoonid (). Osasid polügoone on lõigatud piiriga.
#'
#' @param obj str Objekti nimi.
#' @param pk Piirkonna geomeetriline joon.
#' @param gpkg_home path Salvestatavate GPKG faili asukoht.
#' @param obj_only TRUE/FALSE Kas geomeetriad leitakse ainult objekti või kogu piirikastiga määratud ala jaoks.
#'
#' @examples
#' \dontrun{
#'
#' }
piirkonnale_polygoonide_lisamine <- function(obj = NULL, pk = NULL, gpkg_home = "/tmp", obj_only = TRUE) {
  if (is.null(pk) || !sf::st_is_valid(pk)) {
    cat("\nPalun kontrolli geomeetrilise kujundi õigsust.\n")
    return()
  }
  if (is.null(obj)) {
    cat("\nPuudu on objekti nimi.\n")
    return()
  }
  cat(sprintf("\nAlgparameetrid: objekti nimi %s ja GPKG faili kataloog %s\n", obj, gpkg_home))
  postgres <- sprintf(
    "postgres://dbname=\'%s\' host=%s port=%s user=\'%s\' sslmode=%s password=\'%s\' key=\'fid\' srid=4326 type=Polygon checkPrimaryKeyUnicity=\'1\'",
    conf$dbname, conf$host, conf$port, conf$user, conf$sslmode, conf$password
  )
  dsn <- sprintf("%s/%s.gpkg", gpkg_home, obj)
  input_layer_name <- "piir"
  input_layer <- sprintf("%s|layername=%s", dsn, input_layer_name)
  tmp_gpkg_file <- tempfile(fileext = ".gpkg")

  ## ----------------- piiri sisse jäävad polügoonid -------------------
  ## --------------------------- algandmed -----------------------------
  andmed.df <- data.frame("schema" = character(0), "table" = character(0))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "osm_shp", "table" = "buildings_a"))
  # andmed.df <- rbind(andmed.df, data.frame("schema" = "maaamet", "table" = "aadressandmed")) # POINT
  j <- 1
  for (j in 1:nrow(andmed.df)) {
    output_layer_name <- as.character(andmed.df$table[j])
    # ruut::qgis_algorithm_search_by_word(str = "extract")
    algorithm <- "native:extractbylocation"
    # cat(qgisprocess::qgis_show_help(algorithm = algorithm))
    result <- qgisprocess::qgis_run_algorithm(
      algorithm = algorithm,
      INPUT = sprintf(
        '%s table=\"%s\".\"%s\" (geometry)',
        postgres, andmed.df$schema[j], andmed.df$table[j]
      ),
      INTERSECT = input_layer,
      OUTPUT = tmp_gpkg_file,
      PREDICATE = c(0) # c(0, 1)
      # .quiet = TRUE
    )
    result
    # assign(as.character(andmed.df$table[j]), sf::read_sf(qgisprocess::qgis_output(result, "OUTPUT")))
    system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s -t_srs \"EPSG:3301\"", dsn, tmp_gpkg_file, output_layer_name))
  }

  ## -------------- piiri -30 meetrise puhvri sisse jäävad polügoonid -------------
  ## --------------------------------- algandmed ---------------------------------
  andmed.df <- data.frame("schema" = character(0), "table" = character(0))
  # andmed.df <- rbind(andmed.df, data.frame("schema" = "maaamet", "table" = "aadressandmed")) # POINT
  andmed.df <- rbind(andmed.df, data.frame("schema" = "maaamet", "table" = "asustusyksus"))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "maaamet", "table" = "shp_katastriyksus"))
  ## Esmalt leiame piirile uhverjoone.
  # ruut::qgis_algorithm_search_by_word(str = "buffer")
  algorithm <- "native:buffer"
  # cat(qgisprocess::qgis_show_help(algorithm = algorithm))
  result <- qgisprocess::qgis_run_algorithm(
    algorithm = algorithm,
    DISSOLVE = 0,
    DISTANCE = -30,
    END_CAP_STYLE = 2,
    INPUT = sprintf(
      "%s|layername=piir",
      dsn
    ),
    JOIN_STYLE = 2,
    MITER_LIMIT = 2,
    OUTPUT = tmp_gpkg_file,
    SEGMENTS = 5
    # .quiet = TRUE
  )
  result
  piir_buffer <- sf::read_sf(qgisprocess::qgis_output(result, "OUTPUT"))
  # st_geometry(pk) %>% plot()
  # st_geometry(piir_buffer) %>% plot(add=T, col = 'red')
  j <- 1
  for (j in 1:nrow(andmed.df)) {
    output_layer_name <- as.character(andmed.df$table[j])
    input <- sprintf(
      '%s table=\"%s\".\"%s\" (geometry)',
      postgres, andmed.df$schema[j], andmed.df$table[j]
    )
    # ruut::qgis_algorithm_search_by_word(str = "extract")
    algorithm <- "native:extractbylocation"
    # cat(qgisprocess::qgis_show_help(algorithm = algorithm))
    result <- qgisprocess::qgis_run_algorithm(
      algorithm = algorithm,
      INPUT = input,
      INTERSECT = piir_buffer,
      OUTPUT = tmp_gpkg_file,
      PREDICATE = c(0, 1)
      # .quiet = TRUE
    )
    result
    # assign(as.character(andmed.df$table[j]), sf::read_sf(qgisprocess::qgis_output(result, "OUTPUT")))
    system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s -t_srs \"EPSG:3301\"", dsn, tmp_gpkg_file, output_layer_name))
  }

  ## ----------------- piiriga lõigatud polügoonid -------------------
  ## --------------------------- algandmed ---------------------------
  andmed.df <- data.frame("schema" = character(0), "table" = character(0))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "osm_shp", "table" = "landuse_a"))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "osm_shp", "table" = "water_a"))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "osm_shp", "table" = "pofw_a"))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "osm_shp", "table" = "pois_a"))
  andmed.df <- rbind(andmed.df, data.frame("schema" = "osm_shp", "table" = "natural_a"))
  j <- 1
  for (j in 1:nrow(andmed.df)) {
    output_layer_name <- as.character(andmed.df$table[j])
    input <- sprintf(
      '%s table=\"%s\".\"%s\" (geometry)',
      postgres, andmed.df$schema[j], andmed.df$table[j]
    )
    # ruut::qgis_algorithm_search_by_word(str = "intersect")
    algorithm <- "native:intersection"
    # cat(qgisprocess::qgis_show_help(algorithm = algorithm))
    result <- qgisprocess::qgis_run_algorithm(
      algorithm = algorithm,
      INPUT = input,
      INPUT_FIELDS = "",
      OVERLAY = sprintf(
        "%s|layername=piir",
        dsn
      ),
      OVERLAY_FIELDS = "",
      OVERLAY_FIELDS_PREFIX = "",
      OUTPUT = tmp_gpkg_file
      # .quiet = TRUE
    )
    result
    # assign(as.character(andmed.df$table[j]), sf::read_sf(qgisprocess::qgis_output(result, "OUTPUT")))
    system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s -t_srs \"EPSG:3301\"", dsn, tmp_gpkg_file, output_layer_name))


    # -------------------- alamkihtide filtreerimine -----------------
    ## Maakasutus lahti kirjutada!!
    if (output_layer_name == "landuse_a") {
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_forest -t_srs \"EPSG:3301\" -where \"code = '7201'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_residential -t_srs \"EPSG:3301\" -where \"code = '7203'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_grass -t_srs \"EPSG:3301\" -where \"code = '7218'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_park -t_srs \"EPSG:3301\" -where \"code = '7202'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_farmland -t_srs \"EPSG:3301\" -where \"code = '7229'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_scrub -t_srs \"EPSG:3301\" -where \"code = '7217'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_meadow -t_srs \"EPSG:3301\" -where \"code = '7208'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_cemetery -t_srs \"EPSG:3301\" -where \"code = '7206'\"  ", dsn, tmp_gpkg_file, output_layer_name))
      system(sprintf("ogr2ogr -f GPKG -overwrite  %s %s -nln %s_military -t_srs \"EPSG:3301\" -where \"code = '7213'\"  ", dsn, tmp_gpkg_file, output_layer_name))
    }
  }


  ## ---------------------- vaata layer'id ----------------------
  # Vaata layer'eid
  sf::st_layers(dsn = dsn)
}
# piirkonnale_polygoonide_lisamine(obj = NULL, pk = NULL, gpkg_home = "/tmp")