import pandas as pd
from backend.Property import Property
from collections import defaultdict
from utils.s3 import read_from_s3

from recommendations.recommendation_utils import get_wall_u_value, get_floor_u_value, get_roof_u_value

from backend.app.db.utils import row2dict
from backend.app.config import get_settings
import msgpack


def filter_materials(materials):
    materials_by_type = defaultdict(list)

    mapping = {
        "walls": ["internal_wall_insulation", "external_wall_insulation", "cavity_wall_insulation"],
        "floor": ["suspended_floor_insulation", "solid_floor_insulation", "exposed_floor_insulation"],
        "ventilation": ["mechanical_ventilation"],
        "roof": ["loft_insulation", "flat_roof_insulation", "room_roof_insulation"]
    }

    materials = [row2dict(material) for material in materials]

    for component, types in mapping.items():
        materials_by_type[component] = [part for part in materials if part["type"] in types]

    return dict(materials_by_type)


def insert_temp_recommendation_id(property_recommendations):
    """
    Creates a temporary recommendation id which is needed for
    filtering recommendations between default and no, after the optimiser has been
    run
    :param property_recommendations:  nested list of recommendations, grouped by data_types
    :return: Updated recommendations_to_upload, where where recommendation has a "recommendation_id"
             integer inserted
    """
    idx = 0

    for recs in property_recommendations:
        for rec in recs:
            rec["recommendation_id"] = idx
            idx += 1

    return property_recommendations


def get_cleaned():
    """
    This function will retrieve the cleaned dataset from s3 which has the cleaned
    descriptions for the epc dataset

    This data is stored in MessagePack format and therefore needs to be decoded
    :return:
    """

    cleaned = read_from_s3(
        s3_file_name="cleaned_epc_data/cleaned.bson",
        bucket_name="retrofit-data-{environment}".format(environment=get_settings().ENVIRONMENT)
    )

    cleaned = msgpack.unpackb(cleaned, raw=False)

    return cleaned


def create_recommendation_scoring_data(
    property: Property,
    recommendation: dict,
    starting_epc_data: pd.DataFrame,
    ending_epc_data: pd.DataFrame,
    fixed_data: pd.DataFrame,
):
    """
    This wrapper function prepares data to be passed to the sap model api
    :return:
    """

    scoring_dict = {
        "UPRN": property.data["uprn"],
        "id": "+".join([str(property.id), str(recommendation["recommendation_id"])]),
        "LOCAL_AUTHORITY": property.data["local-authority"],
        **starting_epc_data.to_dict("records")[0],
        **ending_epc_data.to_dict("records")[0],
        **fixed_data.to_dict("records")[0]
    }

    # Set staring u-values if we don't have them
    if scoring_dict["walls_thermal_transmittance"] is None:
        scoring_dict["walls_thermal_transmittance"] = get_wall_u_value(
            clean_description=property.walls["clean_description"],
            age_band=property.age_band,
            is_granite_or_whinstone=property.walls["is_granite_or_whinstone"],
            is_sandstone_or_limestone=property.walls["is_sandstone_or_limestone"]
        )

    if scoring_dict["floor_thermal_transmittance"] is None:
        scoring_dict["floor_thermal_transmittance"] = get_floor_u_value(
            floor_type=property.floor_type,
            area=property.floor_area,
            perimeter=property.perimeter,
            wall_type=property.wall_type,
            insulation_thickness=property.floor["insulation_thickness"],
            age_band=property.age_band,
        )

    if scoring_dict["roof_thermal_transmittance"] is None:
        scoring_dict["roof_thermal_transmittance"] = get_roof_u_value(
            insulation_thickness=property.roof["insulation_thickness"],
            has_dwelling_above=property.roof["has_dwelling_above"],
            is_loft=property.roof["is_loft"],
            is_roof_room=property.roof["is_roof_room"],
            is_thatched=property.roof["is_thatched"],
            age_band=property.age_band,
            is_flat=property.roof["is_flat"],
            is_pitched=property.roof["is_pitched"],
            is_at_rafters=property.roof["is_at_rafters"],
        )

    for col in [
        "walls_insulation_thickness", "floor_insulation_thickness", "roof_insulation_thickness"
    ]:
        if scoring_dict[col] is None:
            scoring_dict[col] = "none"

    # We update the description to indicate it's insulated
    if recommendation["type"] == "wall_insulation":
        # The upgrade made here is to the u-value of the walls and the description of the
        # insulation thickness
        scoring_dict["walls_thermal_transmittance_ENDING"] = recommendation["new_u_value"]
        scoring_dict["walls_insulation_thickness_ENDING"] = "above average"
        scoring_dict["WALLS_ENERGY_EFF_ENDING"] = "Good"
    else:
        if scoring_dict["walls_thermal_transmittance_ENDING"] is None:
            scoring_dict["walls_thermal_transmittance_ENDING"] = get_wall_u_value(
                clean_description=property.walls["clean_description"],
                age_band=property.age_band,
                is_granite_or_whinstone=property.walls["is_granite_or_whinstone"],
                is_sandstone_or_limestone=property.walls["is_sandstone_or_limestone"]
            )

        if scoring_dict["walls_insulation_thickness_ENDING"] is None:
            scoring_dict["walls_insulation_thickness_ENDING"] = "none"

    # Update description to indicate it's insulate
    if recommendation["type"] == "floor_insulation":
        if len(recommendation["parts"]) > 1:
            raise NotImplementedError("Have more than 1 floor insulation part - handle this case")

        scoring_dict["floor_thermal_transmittance_ENDING"] = recommendation["new_u_value"]
        # We don't really see above average for this in the training data
        scoring_dict["floor_insulation_thickness_ENDING"] = "average"
        scoring_dict["FLOOR_ENERGY_EFF_ENDING"] = "Good"
    else:
        if scoring_dict["floor_thermal_transmittance_ENDING"] is None:
            scoring_dict["floor_thermal_transmittance_ENDING"] = get_floor_u_value(
                floor_type=property.floor_type,
                area=property.floor_area,
                perimeter=property.perimeter,
                wall_type=property.wall_type,
                insulation_thickness=property.floor["insulation_thickness"],
                age_band=property.age_band,
            )

        if scoring_dict["floor_insulation_thickness_ENDING"] is None:
            scoring_dict["floor_insulation_thickness_ENDING"] = "none"

    if recommendation["type"] == "roof_insulation":
        scoring_dict["roof_thermal_transmittance_ENDING"] = recommendation["new_u_value"]

        parts = recommendation["parts"]
        if len(parts) != 1:
            raise ValueError("More than one part for roof insulation - investiage me")
        
        scoring_dict["roof_insulation_thickness_ENDING"] = str(parts[0]["depths"][0])
        scoring_dict["ROOF_ENERGY_EFF_ENDING"] = "Very Good"
    else:
        # Fill missing roof u-values - this fill is not based on recommended upgrades
        if scoring_dict["roof_thermal_transmittance_ENDING"] is None:
            scoring_dict["roof_thermal_transmittance_ENDING"] = get_roof_u_value(
                insulation_thickness=property.roof["insulation_thickness"],
                has_dwelling_above=property.roof["has_dwelling_above"],
                is_loft=property.roof["is_loft"],
                is_roof_room=property.roof["is_roof_room"],
                is_thatched=property.roof["is_thatched"],
                age_band=property.age_band,
                is_flat=property.roof["is_flat"],
                is_pitched=property.roof["is_pitched"],
                is_at_rafters=property.roof["is_at_rafters"],
            )

        if scoring_dict["roof_insulation_thickness_ENDING"] is None:
            scoring_dict["roof_insulation_thickness_ENDING"] = "none"

    if recommendation["type"] == "mechanical_ventilation":
        scoring_dict["MECHANICAL_VENTILATION_ENDING"] = 'mechanical, extract only'

    if recommendation["type"] == "sealing_open_fireplace":
        scoring_dict["NUMBER_OPEN_FIREPLACES_ENDING"] = 0

    if recommendation["type"] not in [
        "wall_insulation", "floor_insulation", "roof_insulation", "mechanical_ventilation", "sealing_open_fireplace",
    ]:
        raise NotImplementedError("Implement me")

    return scoring_dict