"""
This application plots frequencies of a variable
of your choice for five bins of your choice.  These five bins represent
inclusive ranges and may overlap, if so desired.  The range entries below
are in units of inches or Fahrenheit where appropriate.  The date selection
sets the year-to-date period used for each year.

<p><strong>Updated 17 March 2021</strong>: The range parameters were
updated to be space delimited so to allow negative numbers to be used.
"""

from datetime import date

import numpy as np
import pandas as pd
from pyiem.database import get_sqlalchemy_conn, sql_helper
from pyiem.exceptions import NoDataFound
from pyiem.plot import figure_axes

from iemweb.autoplot import ARG_STATION

PDICT = {
    "avgt": "Average Temperature",
    "high": "High Temperature",
    "low": "Low Temperature",
    "precip": "Precipitation",
    "snow": "Snowfall",
}


def parse_range(rng):
    """Convert this into bins"""
    if rng.find(" ") == -1:
        raise NoDataFound("Invalid Range Provided")
    return [float(f) for f in rng.split()]


def get_description():
    """Return a dict describing how to call this plotter"""
    desc = {"description": __doc__, "data": True}
    today = date.today()
    desc["arguments"] = [
        ARG_STATION,
        dict(
            type="date",
            name="date",
            default=today.strftime("%Y/%m/%d"),
            label="Select Year-to-Date End Date (inclusive):",
        ),
        dict(
            type="year",
            name="year",
            default=(today.year - 1),
            label="Additional Year to Compare:",
        ),
        dict(
            type="select",
            name="var",
            options=PDICT,
            default="high",
            label="Variable to Plot:",
        ),
        dict(
            type="text",
            name="r1",
            default="50 59",
            label="Range #1 (inclusive, space separated)",
        ),
        dict(
            type="text",
            name="r2",
            default="60 69",
            label="Range #2 (inclusive, space separated)",
        ),
        dict(
            type="text",
            name="r3",
            default="70 79",
            label="Range #3 (inclusive, space separated)",
        ),
        dict(
            type="text",
            name="r4",
            default="80 89",
            label="Range #4 (inclusive, space separated)",
        ),
        dict(
            type="text",
            name="r5",
            default="90 99",
            label="Range #5 (inclusive, space separated)",
        ),
    ]
    return desc


def plotter(ctx: dict):
    """Go"""
    station = ctx["station"]
    r1 = parse_range(ctx["r1"])
    r2 = parse_range(ctx["r2"])
    r3 = parse_range(ctx["r3"])
    r4 = parse_range(ctx["r4"])
    r5 = parse_range(ctx["r5"])
    dt = ctx["date"]
    year = ctx["year"]
    varname = ctx["var"]

    with get_sqlalchemy_conn("coop") as conn:
        df = pd.read_sql(
            sql_helper("""
            SELECT year, day, high, low, precip, snow,
            (high + low) / 2. as avgt from alldata WHERE station = :station and
            extract(doy from day) <= extract(doy from :dt)
        """),
            conn,
            params={"station": station, "dt": dt},
            index_col=None,
        )
    if df.empty:
        raise NoDataFound("No Data Found.")
    for i, rng in enumerate([r1, r2, r3, r4, r5]):
        df[f"cnt{i + 1}"] = 0
        df.loc[
            ((df[varname] >= rng[0]) & (df[varname] <= rng[1])),
            f"cnt{i + 1}",
        ] = 1

    gdf = (
        df[["cnt1", "cnt2", "cnt3", "cnt4", "cnt5", "year"]]
        .groupby("year")
        .sum()
    )

    title = f"{ctx['_sname']} :: Jan 1 - {dt:%b %-d} {PDICT[varname]} Days"
    (fig, ax) = figure_axes(title=title, apctx=ctx)
    bars = ax.bar(
        np.arange(1, 6) - 0.25, gdf.mean().values, width=-0.25, label="Average"
    )
    for mybar in bars:
        ax.text(
            mybar.get_x() - 0.125,
            mybar.get_height() + 0.5,
            f"{mybar.get_height():.1f}",
            fontsize=14,
            ha="center",
        )

    if year in gdf.index:
        bars = ax.bar(
            range(1, 6), gdf.loc[year].values, width=0.25, label=str(year)
        )
        for mybar in bars:
            ax.text(
                mybar.get_x() + 0.125,
                mybar.get_height() + 0.5,
                f"{mybar.get_height():.0f}",
                fontsize=14,
                ha="center",
            )

    if dt.year in gdf.index:
        bars = ax.bar(
            np.arange(1, 6) + 0.25,
            gdf.loc[dt.year].values,
            width=0.25,
            label=str(dt.year),
        )
        for mybar in bars:
            ax.text(
                mybar.get_x() + 0.125,
                mybar.get_height() + 0.5,
                f"{mybar.get_height():.0f}",
                fontsize=14,
                ha="center",
            )
    ax.grid(True)
    ax.set_xticks(range(1, 6))
    ax.set_xticklabels(
        ["%g thru %g" % (one, two) for (one, two) in [r1, r2, r3, r4, r5]]
    )
    ax.legend(loc="best")
    ax.set_ylabel("Days")
    ax.set_ylim(top=ax.get_ylim()[1] + 1)
    ax.set_xlabel(f"{PDICT[varname]} (Ranges Inclusive)")

    return fig, gdf
