"""Views handling ('classical') phenotypes."""
from flask import (flash,
                   request,
                   url_for,
                   redirect,
                   Blueprint,
                   render_template,
                   current_app as app)

from uploader.authorisation import require_login
from uploader.db_utils import database_connection
from uploader.species.models import all_species, species_by_id
from uploader.request_checks import with_species, with_population
from uploader.datautils import safe_int, order_by_family, enumerate_sequence
from uploader.population.models import (populations_by_species,
                                        population_by_species_and_id)

from .models import (dataset_by_id,
                     phenotypes_count,
                     dataset_phenotypes,
                     datasets_by_population)

phenotypesbp = Blueprint("phenotypes", __name__)

@phenotypesbp.route("/phenotypes", methods=["GET"])
@require_login
def index():
    """Direct entry-point for phenotypes data handling."""
    with database_connection(app.config["SQL_URI"]) as conn:
        if not bool(request.args.get("species_id")):
            return render_template("phenotypes/index.html",
                                   species=order_by_family(all_species(conn)),
                                   activelink="phenotypes")

        species = species_by_id(conn, request.args.get("species_id"))
        if not bool(species):
            flash("No such species!", "alert-danger")
            return redirect(url_for("species.populations.phenotypes.index"))
        return redirect(url_for("species.populations.phenotypes.select_population",
                                species_id=species["SpeciesId"]))


@phenotypesbp.route("<int:species_id>/phenotypes/select-population",
                    methods=["GET"])
@require_login
@with_species(redirect_uri="species.populations.phenotypes.index")
def select_population(species: dict, **kwargs):# pylint: disable=[unused-argument]
    """Select the population for your phenotypes."""
    with database_connection(app.config["SQL_URI"]) as conn:
        if not bool(request.args.get("population_id")):
            return render_template("phenotypes/select-population.html",
                                   species=species,
                                   populations=order_by_family(
                                       populations_by_species(
                                           conn, species["SpeciesId"]),
                                       order_key="FamilyOrder"),
                                   activelink="phenotypes")

        population = population_by_species_and_id(
            conn, species["SpeciesId"], int(request.args["population_id"]))
        if not bool(population):
            flash("No such population found!", "alert-danger")
            return redirect(url_for(
                "species.populations.phenotypes.select_population",
                species_id=species["SpeciesId"]))

        return redirect(url_for("species.populations.phenotypes.list_datasets",
                                species_id=species["SpeciesId"],
                                population_id=population["Id"]))



@phenotypesbp.route(
    "<int:species_id>/populations/<int:population_id>/phenotypes/datasets",
    methods=["GET"])
@require_login
@with_population(species_redirect_uri="species.populations.phenotypes.index",
                 redirect_uri="species.populations.phenotypes.select_population")
def list_datasets(species: dict, population: dict, **kwargs):# pylint: disable=[unused-argument]
    """List available phenotype datasets."""
    with database_connection(app.config["SQL_URI"]) as conn:
        return render_template("phenotypes/list-datasets.html",
                               species=species,
                               population=population,
                               datasets=datasets_by_population(
                                   conn,
                                   species["SpeciesId"],
                                   population["Id"]),
                               activelink="list-datasets")


@phenotypesbp.route(
    "<int:species_id>/populations/<int:population_id>/phenotypes/datasets"
    "/<int:dataset_id>/view",
    methods=["GET"])
@require_login
@with_population(species_redirect_uri="species.populations.phenotypes.index",
                 redirect_uri="species.populations.phenotypes.select_population")
def view_dataset(# pylint: disable=[unused-argument]
        species: dict, population: dict, dataset_id: int, **kwargs):
    """View a specific dataset"""
    with database_connection(app.config["SQL_URI"]) as conn:
        dataset = dataset_by_id(
            conn, species["SpeciesId"], population["Id"], dataset_id)
        if not bool(dataset):
            flash("Could not find such a phenotype dataset!", "alert-danger")
            return redirect(url_for(
                "species.populations.phenotypes.list_datasets",
                species_id=species["SpeciesId"],
                population_id=population["Id"]))

        start_at = max(safe_int(request.args.get("start_at") or 0), 0)
        count = int(request.args.get("count") or 20)
        return render_template("phenotypes/view-dataset.html",
                               species=species,
                               population=population,
                               dataset={"Id": dataset_id},
                               phenotype_count=phenotypes_count(
                                   conn, population["Id"], dataset_id),
                               phenotypes=enumerate_sequence(
                                   dataset_phenotypes(conn,
                                                      population["Id"],
                                                      dataset_id,
                                                      offset=start_at,
                                                      limit=count),
                                   start=start_at+1),
                               activelink="view-dataset")