from .DataStream import EChPosmap as pos_map
from .ChannelReader import ChannelReader
from .ChannelPainter import ChannelPainter, ratio_pathes
from matplotlib.figure import Figure
from matplotlib import ticker
from io import BytesIO
import numpy as np
from .algorithm import calc_cov_chsuccs
import time as time

import logging
logger = logging.getLogger('ChannelCumPainter')

class ChannelCovSuccPainter(ChannelPainter):
    def __init__(self, start_time: int, end_time: int, chnames: set = None, card_types: set = None, spec: int = None, filter_wave: int = None):
        self._reader = ChannelReader()
        filter_wave = filter_wave or 3600
        self._chnames, self._card_types, self._spec, self._filter_wave = chnames, card_types, spec, filter_wave
        days, self._start_time, self._end_time, self._interval = self.calc_time(self._reader, start_time, end_time)
        pass

    def paint(self):
        reader = self._reader
        days, _start_time, _end_time, _interval = self.calc_time(self._reader, self._start_time - self._filter_wave, self._end_time)
        if len(days) == 0:
            return BytesIO()

        tuple_pathes = reader.many_tuple_path(days, self._chnames, self._card_types, self._spec)
        gen = ratio_pathes(reader, tuple_pathes, days, self._spec)
        day_stamp = days[0]

        fig_create, fig_flush = self._fig_funs()
        ax, fig = fig_create()

        x = np.array([d - self._start_time for d in range(self._start_time, self._end_time)])
        window = np.ones(self._filter_wave)

        left_len = self._start_time - _start_time
        right_len = 0

        stime = lambda t: time.strftime('%d-%H:%M:%S', time.localtime(t))
        logger.debug("start_time %d, %s end_time=%s left_len=%d right_len=%d",
                     self._start_time, stime(self._start_time), stime(self._end_time),left_len,right_len)

        chname_ratios = []
        for _chname, _card_type, _spec, _data in gen:
            succ, commit,succs,counts = calc_cov_chsuccs(_data, pos_map, _start_time - day_stamp, _end_time - day_stamp, window, left_len,right_len)
            label, ratio = self._label(chname=_chname, succ=succs, count=counts, card_type=_card_type, spec=_spec)
            ax.plot(x, succ, ls='-', label=label)
            ax.plot(x, commit / 100, ls='--', label=label)

            if _card_type is None and _spec is None and _chname != 'all':
                chname_ratios.append((_chname, ratio))

        ticks = self.calc_xticks(self._start_time, self._end_time, self._interval)
        xlables = [time.strftime('%d-%H:%M:%S', time.localtime(d + self._start_time)) for d in ticks]
        buf = fig_flush(ax, fig, ticks, xlables)

        chname_ratios = sorted(chname_ratios, key=lambda x: (x[1], x[0]), reverse=True)
        result = []
        for name, ratio in chname_ratios:
            result.append(f'{name}:{ratio}')

        return buf, result

    def _fig_funs(self):
        def create():
            fig = Figure(figsize=(19, 8))
            ax = fig.subplots()
            ax.set_title('success count')
            ax.set(xlabel='time', ylabel='count')
            return ax, fig

        def flush(ax, fig, ticks, lables):
            ax.set_xticks(ticks=ticks)
            ax.set_xticklabels(lables)
            fig.autofmt_xdate()
            ax.grid()
            ax.legend(bbox_to_anchor=(1, 1), loc='upper left')
            fig.tight_layout()

            buf = BytesIO()
            fig.savefig(buf, format="png")
            return buf

        return create, flush