from scrub_layer_class import *
from basic_functions import *


class ScrubMTL:
  def __init__(self, qgis_path, nrcan, geoindex, property_assessment,
               montreal_boundary, output_paths_dir):
    self.qgis_path = qgis_path
    self.nrcan = nrcan
    self.geoindex = geoindex
    self.property_assessment = property_assessment
    self.montreal_boundary = montreal_boundary
    self.output_paths_dir = output_paths_dir
    self.output_paths = {
      'Fixed NRCan': '',
      'Fixed GeoIndex': '',
      'Clipped Fixed GeoIndex': '',
      'Splitted NRCan': '',
      'Pairwise Clipped Property Assessment Partitions': '',
      'Pairwise Clipped Merged Property Assessment': '',
      'Property Assessment and NRCan': '',
      'Property Assessment and NRCan and GeoIndex': '',
      'Deleted Duplicates Layer': '',
      'Singled Parts Layer': ''
    }

  @staticmethod
  def merge_layers(layers_path, mered_layer_path):
    merging_layers = find_shp_files(layers_path)
    QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())

    params = {'LAYERS': merging_layers,
              'CRS': None,
              'OUTPUT': mered_layer_path}

    processing.run("native:mergevectorlayers", params)

  def generate_output_paths(self):
    for path in self.output_paths.keys():
      new_folder = path.lower().replace(' ', '_')
      output_path = self.output_paths_dir + '/' + new_folder
      os.mkdir(output_path)
      self.output_paths[path] = output_path + f'/{new_folder}.shp'

  def initialize_layer(self, layer_path, layer_name):
    return ScrubLayer(self.qgis_path, layer_path, layer_name)

  def process_nrcan(self):
    nrcan = self.initialize_layer(self.nrcan, 'NRCan')
    print(f'Data Count of the NRCan layer: {nrcan.data_count}')
    nrcan.create_spatial_index()
    nrcan.fix_geometries(self.output_paths['Fixed NRCan'])
    nrcan_fixed = \
        self.initialize_layer(self.output_paths['Fixed NRCan'],
                              'Fixed NRCan')
    nrcan_fixed.create_spatial_index()
    print(f'Data Count of the NRCan layer ({nrcan_fixed.layer_name})'
          f'after fixing geometries: {nrcan_fixed.layer.featureCount()}')

  def process_geo_index(self):
    geo_index = self.initialize_layer(self.geoindex, 'GeoIndex')
    print(f'Data Count of the GeoIndex layer: {geo_index.data_count}')
    geo_index.create_spatial_index()
    geo_index.fix_geometries(self.output_paths['Fixed GeoIndex'])
    geo_index_fixed = \
        self.initialize_layer(self.output_paths['Fixed GeoIndex'],
                              'Fixed GeoIndex')
    geo_index_fixed.create_spatial_index()
    print(f'Data Count of the GeoIndex layer ({geo_index_fixed.layer_name})'
          f'after fixing geometries: {geo_index_fixed.layer.featureCount()}')
    geo_index_fixed.clip_layer(self.montreal_boundary,
                               self.output_paths['Clipped Fixed GeoIndex'])
    geo_index_clipped = \
        self.initialize_layer(self.output_paths['Clipped Fixed GeoIndex'],
                              'Clipped Fixed GeoIndex')
    geo_index_clipped.create_spatial_index()
    print(f'Data Count of the {geo_index_fixed.layer_name} '
          f'({geo_index_clipped.layer_name}) after clipping it '
          f'based on the Montreal Boundary layer: '
          f'{geo_index_clipped.layer.featureCount()}')
    
  def process_property_assesment(self):
    pass

  def refine_heights(self):
    pass

  def remove_redundant_fields(self):
    pass

  def remove_records_by_area(self, area_limitation):
    """Area limitation can be assigned in the constructor"""
    pass