from datetime import datetime
from kitty.boss import get_boss
from kitty.fast_data_types import Screen, add_timer, get_options
from kitty.tab_bar import (
    DrawData,
    ExtraData,
    Formatter,
    TabBarData,
    as_rgb,
    draw_attributed_string,
    draw_title,
)
from kitty.utils import color_as_int

RIGHT_MARGIN = 1
REFRESH_TIME = 1
ICON = "  "

opts = get_options()
icon_fg = as_rgb(color_as_int(opts.color16))
icon_bg = as_rgb(color_as_int(opts.color8))
bat_text_color = as_rgb(color_as_int(opts.color15))
clock_color = as_rgb(color_as_int(opts.color15))
date_color = as_rgb(color_as_int(opts.color8))
UNPLUGGED_ICONS = {
    10: "",
    20: "",
    30: "",
    40: "",
    50: "",
    60: "",
    70: "",
    80: "",
    90: "",
    100: "",
}
PLUGGED_ICONS = {
    1: "",
}
UNPLUGGED_COLORS = {
    15: as_rgb(color_as_int(opts.color1)),
    16: as_rgb(color_as_int(opts.color15)),
}
PLUGGED_COLORS = {
    15: as_rgb(color_as_int(opts.color1)),
    16: as_rgb(color_as_int(opts.color6)),
    99: as_rgb(color_as_int(opts.color6)),
    100: as_rgb(color_as_int(opts.color2)),
}


def _draw_icon(screen: Screen, index: int) -> int:
    if index != 1:
        return 0

    fg, bg = screen.cursor.fg, screen.cursor.bg
    screen.cursor.fg = icon_fg
    screen.cursor.bg = icon_bg
    screen.draw(ICON)
    screen.cursor.fg, screen.cursor.bg = fg, bg
    screen.cursor.x = len(ICON)
    return screen.cursor.x


def _draw_left_status(
    draw_data: DrawData,
    screen: Screen,
    tab: TabBarData,
    before: int,
    max_title_length: int,
    index: int,
    is_last: bool,
) -> int:
    if draw_data.leading_spaces:
        screen.draw(" " * draw_data.leading_spaces)

    draw_title(draw_data, screen, tab, index)
    trailing_spaces = min(max_title_length - 1, draw_data.trailing_spaces)
    max_title_length -= trailing_spaces
    extra = screen.cursor.x - before - max_title_length
    if extra > 0:
        screen.cursor.x -= extra + 1
        screen.draw("…")
    if trailing_spaces:
        screen.draw(" " * trailing_spaces)
    end = screen.cursor.x
    screen.cursor.bold = screen.cursor.italic = False
    screen.cursor.fg = 0
    if not is_last:
        screen.cursor.bg = as_rgb(color_as_int(draw_data.inactive_bg))
        screen.draw(draw_data.sep)
    screen.cursor.bg = 0
    return end


def _draw_right_status(
    screen: Screen, is_last: bool, cells: list
) -> int:
    if not is_last:
        return 0

    draw_attributed_string(Formatter.reset, screen)

    right_status_length = RIGHT_MARGIN
    for i in cells:
        right_status_length += len(str(i[1]))

    draw_spaces = screen.columns - screen.cursor.x - right_status_length
    if draw_spaces > 0:
        screen.draw(" " * draw_spaces)

    screen.cursor.fg = 0
    for color, status in cells:
        screen.cursor.fg = color
        screen.draw(status)
    screen.cursor.bg = 0

    if screen.columns - screen.cursor.x > right_status_length:
        screen.cursor.x = screen.columns - right_status_length

    return screen.cursor.x


def _redraw_tab_bar(_):
    tm = get_boss().active_tab_manager
    if tm is not None:
        tm.mark_tab_bar_dirty()


def get_battery_cells() -> list:
    try:
        with open("/sys/class/power_supply/BAT0/status", "r") as f:
            status = f.read()
        with open("/sys/class/power_supply/BAT0/capacity", "r") as f:
            percent = int(f.read())
        if status == "Discharging\n":
            icon_color = UNPLUGGED_COLORS[
                min(UNPLUGGED_COLORS.keys(), key=lambda x: abs(x - percent))
            ]
            icon = UNPLUGGED_ICONS[
                min(UNPLUGGED_ICONS.keys(), key=lambda x: abs(x - percent))
            ]
        elif status == "Not charging\n":
            icon_color = UNPLUGGED_COLORS[
                min(UNPLUGGED_COLORS.keys(), key=lambda x: abs(x - percent))
            ]
            icon = PLUGGED_ICONS[
                min(PLUGGED_ICONS.keys(), key=lambda x: abs(x - percent))
            ]
        else:
            icon_color = PLUGGED_COLORS[
                min(PLUGGED_COLORS.keys(), key=lambda x: abs(x - percent))
            ]
            icon = PLUGGED_ICONS[
                min(PLUGGED_ICONS.keys(), key=lambda x: abs(x - percent))
            ]

        percent_cell = (bat_text_color, str(percent) + "% ")
        icon_cell = (icon_color, icon)
        return [percent_cell, icon_cell]
    except FileNotFoundError:
        return []


timer_id = None


def draw_tab(
    draw_data: DrawData,
    screen: Screen,
    tab: TabBarData,
    before: int,
    max_title_length: int,
    index: int,
    is_last: bool,
    _: ExtraData,
) -> int:
    global timer_id
    if timer_id is None:
        timer_id = add_timer(_redraw_tab_bar, REFRESH_TIME, True)
    clock = datetime.now().strftime(" %H:%M")
    date = datetime.now().strftime(" %d.%m.%Y")
    cells = get_battery_cells()
    cells.append((clock_color, clock))
    cells.append((date_color, date))

    _draw_icon(screen, index)
    _draw_left_status(
        draw_data,
        screen,
        tab,
        before,
        max_title_length,
        index,
        is_last,
    )
    _draw_right_status(
        screen,
        is_last,
        cells,
    )

    return screen.cursor.x