"""
Construction catalog
SPDX - License - Identifier: LGPL - 3.0 - or -later
Copyright © 2022 Project Author name guillermo.gutierrezmorote@concordia.ca
"""

import json

from flask import request, Response
from flask_restful import Resource
from hub.catalog_factories.data_models.construction.archetype import Archetype
from hub.catalog_factories.data_models.construction.construction import Construction
from hub.catalog_factories.data_models.construction.material import Material
from hub.catalog_factories.data_models.construction.window import Window
from hub_api.helpers.session_helper import refresh_session
from hub_api.helpers.auth import role_required
from hub.persistence.models import UserRoles


class ToJson:
  @staticmethod
  def archetype_to_json(archetype):
    constructions = []
    for construction in archetype.constructions:
      constructions.append(ToJson.construction_to_json(construction))
    dictionary = {
      'name': archetype.name,
      'function': archetype.function,
      'construction_period': archetype.construction_period,
      'average_storey_height': archetype.average_storey_height,
      'thermal_capacity': archetype.thermal_capacity,
      'extra_loses_due_to_thermal_bridges': archetype.extra_loses_due_to_thermal_bridges,
      'indirect_heated_ratio': archetype.indirect_heated_ratio,
      'infiltration_rate_for_ventilation_system_off': archetype.infiltration_rate_for_ventilation_system_off,
      'infiltration_rate_for_ventilation_system_on': archetype.infiltration_rate_for_ventilation_system_on,
      'constructions': constructions
    }
    return dictionary

  @staticmethod
  def construction_to_json(construction):
    layers = []
    for layer in construction.layers:
      layers.append(ToJson.layer_to_json(layer))
    dictionary = {'name': construction.name,
                  'type': construction.type,
                  'layers': layers
                  }
    if construction.window is not None:
      dictionary['window_ratio'] = construction.window_ratio
      dictionary['window'] = ToJson.window_to_json(construction.window)
    return dictionary

  @staticmethod
  def window_to_json(window):
    if window is None:
      return {}
    dictionary = {
      'name': window.name,
      'frame_ratio': window.frame_ratio,
      'g_value': window.g_value,
      'overall_u_value': str(window.overall_u_value)
    }
    return dictionary

  @staticmethod
  def layer_to_json(layer):
    dictionary = {'name': layer.name,
                  'thickness': layer.thickness,
                  'material': ToJson.material_to_json(layer.material),
                  }
    return dictionary

  @staticmethod
  def material_to_json(material):
    dictionary = {'id': material.id,
                  'name': material.name,
                  'solar_absorptance': material.solar_absorptance,
                  'thermal_absorptance': material.thermal_absorptance,
                  'visible_absorptance': material.visible_absorptance,
                  'no_mass': str(material.no_mass),
                  'thermal_resistance': '',
                  'conductivity': '',
                  'density': '',
                  'specific_heat': ''
                  }
    if material.no_mass:
      dictionary['thermal_resistance'] = material.thermal_resistance
    else:
      dictionary['conductivity'] = material.conductivity
      dictionary['density'] = material.density
      dictionary['specific_heat'] = material.specific_heat
    return dictionary


class ConstructionCatalogEntry(Resource):
  def __init__(self):
    pass

  @role_required([UserRoles.Admin.value, UserRoles.Hub_Reader.value])
  def post(self):
    session = refresh_session(request)
    if session is None:
      return Response(json.dumps({'error': 'invalid session'}), status=401)
    headers = session.headers
    catalog = session.construction_catalog
    name = None
    if request.data == b'' or request.json['name'] is None:
      response = {'error': 'Mandatory parameter "name" is missing'}
      return Response(json.dumps(response), headers=headers, status=400)
    try:
      name = request.json['name']
      entry = catalog.get_entry(name)
      output = {}
      if isinstance(entry, Archetype):
        output['archetypes'] = ToJson.archetype_to_json(entry)
      if isinstance(entry, Construction):
        output['constructions'] = ToJson.construction_to_json(entry)
      if isinstance(entry, Material):
        output['materials'] = ToJson.material_to_json(entry)
      if isinstance(entry, Window):
        output['windows'] = ToJson.window_to_json(entry)
      return Response(json.dumps(output), headers=headers)
    except IndexError:
      response = {'error': f'Name "{name}" unknown'}
      return Response(json.dumps(response), headers=headers, status=400)


class ConstructionCatalogEntries(Resource):
  def __init__(self):
    pass

  @role_required([UserRoles.Admin.value, UserRoles.Hub_Reader.value])
  def post(self):
    session = refresh_session(request)
    if session is None:
      return Response(json.dumps({'error': 'invalid session'}), status=401)
    headers = session.headers
    catalog = session.construction_catalog
    category = None
    if request.data != b'':
      category = request.json['category']
    output = {}
    if category is None:
      output = {'archetypes': [], 'constructions':[], 'materials':[], 'windows':[]}
      content = catalog.entries()
      for archetype in content.archetypes:
        output['archetypes'].append(ToJson.archetype_to_json(archetype))
      for construction in content.constructions:
        output['constructions'].append(ToJson.construction_to_json(construction))
      for material in content.materials:
        output['materials'].append(ToJson.material_to_json(material))
      for window in content.windows:
        output['windows'].append(ToJson.window_to_json(window))
    else:
      try:
        output[category] = []
        content = catalog.entries(category)
        for entry in content:
          if isinstance(entry, Archetype):
            output[category].append(ToJson.archetype_to_json(entry))
          if isinstance(entry, Construction):
            output[category].append(ToJson.construction_to_json(entry))
          if isinstance(entry, Material):
            output[category].append(ToJson.material_to_json(entry))
          if isinstance(entry, Window):
            output[category].append(ToJson.window_to_json(entry))
      except ValueError:
        output = {'error': f'Category "{category}" unknown'}
        return Response(json.dumps(output), headers=headers, status=400)
    return Response(json.dumps(output), headers=headers)


class ConstructionCatalogNames(Resource):
  def __init__(self):
    pass

  @staticmethod
  def post():
    session = refresh_session(request)
    if session is None:
      return Response(json.dumps({'error': 'invalid session'}), status=401)
    headers = session.headers
    catalog = session.construction_catalog
    category = None
    if request.data != b'':
      category = request.json['category']
    if category is None:
      return Response(json.dumps(catalog.names()), headers=headers)
    else:
      try:
        return Response(json.dumps(catalog.names(category)), headers=headers)
      except ValueError:
        response = {'error': f'Category "{category}" unknown'}
        return Response(json.dumps(response), headers=headers, status=400)