import subprocess
import xmltodict

import geopandas as gpd
from shapely.geometry import Point

from matsim_activity_to_matsim_schedule import MatsimActivityToMatsimSchedule
from hub_function_to_matsim_activity import HubFunctionToMatsimActivity

class MatSimEngine:
  def __init__(self, city, output_file_path):
    self._city = city
    self._output_file_path = output_file_path

    facilities_dict = {
      'facilities': {
        '@name': 'Montreal Facilities',
        'facility': []
      }
    }

    hub_function_to_matsim = HubFunctionToMatsimActivity()
    matsim_schedule = MatsimActivityToMatsimSchedule()

    buildings_shape_data = {
      'id': [],
      'geometry': []
    }

    # 1- Facilities
    # TODO: Add the ability for a building to have multiple activities
    for building in city.buildings:
      activity = hub_function_to_matsim.dictionary[building.function]
      schedule = matsim_schedule.dictionary[activity]
      start_time, end_time = schedule.split('-')

      new_id = 0
      for surface in building.surfaces:
        for coord in surface.solid_polygon.coordinates:
          new_id += 1
          buildings_shape_data['id'].append(f"{new_id}_building.name")
          buildings_shape_data['geometry'].append(Point(coord[0], coord[1]))

      facility = {
        '@id': building.name,
        '@x': str(building.centroid[0]),
        '@y': str(building.centroid[1]),
        'activity': {
          '@type': activity,
          'capacity': {
            '@value': '4.0' # TODO: Replace with a proper value taken from function
          },
          'opentime': {
            '@day': 'wkday',
            '@start_time': start_time,
            '@end_time': end_time
          }
        }
      }
      facilities_dict['facilities']['facility'].append(facility)

    gdf = gpd.GeoDataFrame(
      buildings_shape_data,
      crs="EPSG:26911"
    )

    gdf.to_file("input_files/buildings_shapefile.shp")

    # Convert the Python dictionary to an XML string
    xml_content = xmltodict.unparse(facilities_dict, pretty=True)

    # Write the XML to the file
    with open(f"{output_file_path}/montreal_facilities.xml", 'w') as file:
      file.write(xml_content)

    # 2- Network
    # First get only the part of the network necessary for the simulation
    java_path = "java"
    jar_path = "matsim-network-from-osm.jar"
    command = [java_path, "-jar", jar_path, "input_files/merged-network.osm.pbf", "input_files/buildings_shapefile.shp", f"{output_file_path}/network.xml.gz"]
    subprocess.run(command)

    # 3- Population
    # 4- Config Generation

  def run(self):
    java_path = "java"
    jar_path = "matsim.jar"
    command = [java_path, "-jar", jar_path]

    # Must generate this config file first.
    # command.append(config_file_path)

    subprocess.run(command)