import math

import matplotlib.pyplot as plt

from util.debug import DEBUG
from util.debug import debug_print


def up_down_list(_list):
    min_value = min(_list)
    max_value = max(_list)
    return [-(x - min_value) + max_value for x in _list]


def min_max_list(src_list, tar_min, tar_max):
    src_min = min(src_list)
    src_max = max(src_list)
    src_range = abs(src_max - src_min)
    tar_range = abs(tar_max - tar_min)
    scale_ratio = 0 if src_range == 0 else tar_range / src_range
    floor_up = [v - src_min for v in src_list]
    scale_to = [v * scale_ratio for v in floor_up]
    floor_down = [v + tar_min for v in scale_to]
    return floor_down


def draw_lists(title='', date_list=None, **kv_list):
    debug_print('draw_lists, date_list = ', str(date_list))

    idx_list = 0
    idx_axs = 0
    rows = math.ceil(len(kv_list.items()) / 3)
    fig, axs = plt.subplots(rows, 1, sharex=True)
    for key, value in kv_list.items():
        if type(key) is str and type(value) is list:
            axs[idx_axs].plot(date_list, value, label=key)
            axs[idx_axs].legend()
        idx_list = idx_list + 1
        idx_axs = int(idx_list / 3)

    plt.gcf().autofmt_xdate()
    # plt.title(title)

    if DEBUG:
        # plt.show()
        file_uri = '.doc/' + title + '.png'
        fig.savefig(file_uri)
    else:
        file_uri = '.doc/' + title + '.png'
        fig.savefig(file_uri)

    return fig