# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
"""Loads datasets, dashboards and slices in a new superset instance"""
import textwrap

import pandas as pd
from sqlalchemy import Float, String
from sqlalchemy.sql import column

from superset import db
from superset.connectors.sqla.models import SqlMetric
from superset.models.slice import Slice
from superset.utils import core as utils

from .helpers import get_example_data, merge_slice, misc_dash_slices, TBL


def load_energy(
    only_metadata: bool = False, force: bool = False, sample: bool = False
) -> None:
    """Loads an energy related dataset to use with sankey and graphs"""
    tbl_name = "energy_usage"
    database = utils.get_example_database()
    table_exists = database.has_table_by_name(tbl_name)

    if not only_metadata and (not table_exists or force):
        data = get_example_data("energy.json.gz")
        pdf = pd.read_json(data)
        pdf = pdf.head(100) if sample else pdf
        pdf.to_sql(
            tbl_name,
            database.get_sqla_engine(),
            if_exists="replace",
            chunksize=500,
            dtype={"source": String(255), "target": String(255), "value": Float()},
            index=False,
            method="multi",
        )

    print("Creating table [wb_health_population] reference")
    tbl = db.session.query(TBL).filter_by(table_name=tbl_name).first()
    if not tbl:
        tbl = TBL(table_name=tbl_name)
    tbl.description = "Energy consumption"
    tbl.database = database

    if not any(col.metric_name == "sum__value" for col in tbl.metrics):
        col = str(column("value").compile(db.engine))
        tbl.metrics.append(
            SqlMetric(metric_name="sum__value", expression=f"SUM({col})")
        )

    db.session.merge(tbl)
    db.session.commit()
    tbl.fetch_metadata()

    slc = Slice(
        slice_name="Energy Sankey",
        viz_type="sankey",
        datasource_type="table",
        datasource_id=tbl.id,
        params=textwrap.dedent(
            """\
        {
            "collapsed_fieldsets": "",
            "groupby": [
                "source",
                "target"
            ],
            "metric": "sum__value",
            "row_limit": "5000",
            "slice_name": "Energy Sankey",
            "viz_type": "sankey"
        }
        """
        ),
    )
    misc_dash_slices.add(slc.slice_name)
    merge_slice(slc)

    slc = Slice(
        slice_name="Energy Force Layout",
        viz_type="directed_force",
        datasource_type="table",
        datasource_id=tbl.id,
        params=textwrap.dedent(
            """\
        {
            "charge": "-500",
            "collapsed_fieldsets": "",
            "groupby": [
                "source",
                "target"
            ],
            "link_length": "200",
            "metric": "sum__value",
            "row_limit": "5000",
            "slice_name": "Force",
            "viz_type": "directed_force"
        }
        """
        ),
    )
    misc_dash_slices.add(slc.slice_name)
    merge_slice(slc)

    slc = Slice(
        slice_name="Heatmap",
        viz_type="heatmap",
        datasource_type="table",
        datasource_id=tbl.id,
        params=textwrap.dedent(
            """\
        {
            "all_columns_x": "source",
            "all_columns_y": "target",
            "canvas_image_rendering": "pixelated",
            "collapsed_fieldsets": "",
            "linear_color_scheme": "blue_white_yellow",
            "metric": "sum__value",
            "normalize_across": "heatmap",
            "slice_name": "Heatmap",
            "viz_type": "heatmap",
            "xscale_interval": "1",
            "yscale_interval": "1"
        }
        """
        ),
    )
    misc_dash_slices.add(slc.slice_name)
    merge_slice(slc)