"""
Module to hold the entrypoint functions that generate heatmaps
"""

import io
from flask import jsonify
from flask import request
from flask import Blueprint, current_app
from gn3.heatmaps import build_heatmap
from gn3.db_utils import database_connection

heatmaps = Blueprint("heatmaps", __name__)

@heatmaps.route("/clustered", methods=("POST",))
def clustered_heatmaps():
    """
    Parses the incoming data and responds with the JSON-serialized plotly figure
    representing the clustered heatmap.
    """
    heatmap_request = request.get_json()
    traits_names = heatmap_request.get("traits_names", tuple())
    vertical = heatmap_request.get("vertical", False)
    if len(traits_names) < 2:
        return jsonify({
            "message": "You need to provide at least two trait names."
        }), 400
    with database_connection(current_app.config["SQL_URI"], logger=current_app.logger) as conn:
        def parse_trait_fullname(trait):
            name_parts = trait.split(":")
            return f"{name_parts[1]}::{name_parts[0]}"
        traits_fullnames = [parse_trait_fullname(trait) for trait in traits_names]

        with io.StringIO() as io_str:
            figure = build_heatmap(conn,
                                   traits_fullnames,
                                   f'{current_app.config["GENOTYPE_FILES"]}/genotype',
                                   vertical=vertical,
                                   tmpdir=current_app.config["TMPDIR"])
            figure.write_json(io_str)
            fig_json = io_str.getvalue()
        return fig_json, 200