"""
Variables and methods for working with Rich text output.
"""
from shutil import get_terminal_size
from typing import List

from rich.console import Console
from rich.errors import MarkupError
from rich.style import Style
from rich.text import Text
from rich.theme import Theme

from yaralyzer.config import is_env_var_set_and_not_false, is_invoked_by_pytest

DEFAULT_CONSOLE_WIDTH = 160

# Colors
ALERT_STYLE = 'error'  # Regex Capture used when extracting quoted chunks of bytes
BYTES = 'color(100) dim'
BYTES_NO_DIM = 'color(100)'
BYTES_BRIGHTEST = 'color(220)'
BYTES_BRIGHTER = 'orange1'
BYTES_HIGHLIGHT = 'color(136)'
DANGER_HEADER = 'color(88) on white'  # Red
DARK_GREY = 'color(236)'
GREY = 'color(241)'
GREY_ADDRESS = 'color(238)'
PEACH = 'color(215)'

# Theme used by main console
YARALYZER_THEME_DICT = {
    # colors
    'dark_orange': 'color(58)',
    'grey': GREY,
    'grey.dark': DARK_GREY,
    'grey.dark_italic': f"{DARK_GREY} italic",
    'grey.darker_italic': 'color(8) dim italic',
    'grey.darkest': 'color(235) dim',
    'grey.light': 'color(248)',
    'off_white': 'color(245)',
    'zero_bytes': 'color(20)',
    # data types
    'encoding': 'color(158) underline bold',
    'encoding.header': 'color(158) bold',
    'encoding.language': 'dark_green italic',
    'number': 'cyan',
    'regex': 'color(218) dim',
    'no_attempt': "color(60) dim italic",
    # design elements
    'decode.section_header': 'color(100) reverse',
    'decode.subheading': PEACH,
    'decode.subheading_2': 'color(215) dim italic',
    'headline': 'bold white underline',
    # bytes
    'ascii': 'color(58)',
    'ascii_unprintable': 'color(131)',
    'bytes': BYTES,
    'bytes.title_dim': 'orange1 dim',
    'bytes.title': BYTES_BRIGHTER,
    'bytes.decoded': BYTES_BRIGHTEST,
    # yara
    'matched_rule': 'on bright_black bold',
    'yara.key': DARK_GREY,
    'yara.match_var': 'color(156) italic',
    'yara.string': 'white',
    'yara.date': 'color(216)',
    'yara.url': 'color(220)',
    'yara.int': 'color(45)',
    'yara.hex': 'color(98)',
    'yara.scanned': Style(color='yellow', underline=True, bold=True),
    'yara.rules':  Style(color='color(135)', underline=True, bold=True),
    # error log events
    'error': 'bright_red',
}

YARALYZER_THEME = Theme(YARALYZER_THEME_DICT)


def console_width_possibilities():
    # Subtract 2 from terminal cols just as a precaution in case things get weird
    return [get_terminal_size().columns - 2, DEFAULT_CONSOLE_WIDTH]


def console_width() -> int:
    """Current width set in console obj"""
    return console._width or 40


# Maximize output width if YARALYZER_MAXIMIZE_WIDTH is set (also can changed with --maximize-width option)
if is_invoked_by_pytest():
    CONSOLE_WIDTH = DEFAULT_CONSOLE_WIDTH
elif is_env_var_set_and_not_false('YARALYZER_MAXIMIZE_WIDTH'):
    CONSOLE_WIDTH = max(console_width_possibilities())
else:
    CONSOLE_WIDTH = min(console_width_possibilities())

# Many bytes take 4 chars to print (e.g. '\xcc') so this is the max bytes we can safely print in a line
CONSOLE_PRINT_BYTE_WIDTH = int(CONSOLE_WIDTH / 4.0)
console = Console(theme=YARALYZER_THEME, color_system='256', highlight=False, width=CONSOLE_WIDTH)


def console_print_with_fallback(_string, style=None) -> None:
    """Fallback to regular print() if there's a Markup issue"""
    try:
        console.print(_string, style=style)
    except MarkupError:
        console.print(f"Hit a bracket issue with rich.console printing, defaulting to plain print", style='warn')
        print(_string.plain if isinstance(_string, Text) else _string)


def theme_colors_with_prefix(prefix: str) -> List[Text]:
    return [Text(k, v) for k, v in YARALYZER_THEME.styles.items() if k.startswith(prefix)]
