import re
from collections import UserDict

from bdffont.error import BdfPropKeyError, BdfPropValueError, BdfXlfdError

_KEY_FOUNDRY = 'FOUNDRY'
_KEY_FAMILY_NAME = 'FAMILY_NAME'
_KEY_WEIGHT_NAME = 'WEIGHT_NAME'
_KEY_SLANT = 'SLANT'
_KEY_SETWIDTH_NAME = 'SETWIDTH_NAME'
_KEY_ADD_STYLE_NAME = 'ADD_STYLE_NAME'
_KEY_PIXEL_SIZE = 'PIXEL_SIZE'
_KEY_POINT_SIZE = 'POINT_SIZE'
_KEY_RESOLUTION_X = 'RESOLUTION_X'
_KEY_RESOLUTION_Y = 'RESOLUTION_Y'
_KEY_SPACING = 'SPACING'
_KEY_AVERAGE_WIDTH = 'AVERAGE_WIDTH'
_KEY_CHARSET_REGISTRY = 'CHARSET_REGISTRY'
_KEY_CHARSET_ENCODING = 'CHARSET_ENCODING'

_KEY_DEFAULT_CHAR = 'DEFAULT_CHAR'
_KEY_FONT_ASCENT = 'FONT_ASCENT'
_KEY_FONT_DESCENT = 'FONT_DESCENT'
_KEY_CAP_HEIGHT = 'CAP_HEIGHT'
_KEY_X_HEIGHT = 'X_HEIGHT'

_KEY_FONT_VERSION = 'FONT_VERSION'
_KEY_COPYRIGHT = 'COPYRIGHT'
_KEY_NOTICE = 'NOTICE'

_STR_VALUE_KEYS = {
    _KEY_FOUNDRY,
    _KEY_FAMILY_NAME,
    _KEY_WEIGHT_NAME,
    _KEY_SLANT,
    _KEY_SETWIDTH_NAME,
    _KEY_ADD_STYLE_NAME,
    _KEY_SPACING,
    _KEY_CHARSET_REGISTRY,
    _KEY_CHARSET_ENCODING,
    _KEY_FONT_VERSION,
    _KEY_COPYRIGHT,
    _KEY_NOTICE,
}

_INT_VALUE_KEYS = {
    _KEY_PIXEL_SIZE,
    _KEY_POINT_SIZE,
    _KEY_RESOLUTION_X,
    _KEY_RESOLUTION_Y,
    _KEY_AVERAGE_WIDTH,
    _KEY_DEFAULT_CHAR,
    _KEY_FONT_ASCENT,
    _KEY_FONT_DESCENT,
    _KEY_CAP_HEIGHT,
    _KEY_X_HEIGHT,
}

_XLFD_FONT_NAME_STR_VALUE_KEYS = {
    _KEY_FOUNDRY,
    _KEY_FAMILY_NAME,
    _KEY_WEIGHT_NAME,
    _KEY_SLANT,
    _KEY_SETWIDTH_NAME,
    _KEY_ADD_STYLE_NAME,
    _KEY_SPACING,
    _KEY_CHARSET_REGISTRY,
    _KEY_CHARSET_ENCODING,
}

_XLFD_FONT_NAME_KEYS_ORDER = [
    _KEY_FOUNDRY,
    _KEY_FAMILY_NAME,
    _KEY_WEIGHT_NAME,
    _KEY_SLANT,
    _KEY_SETWIDTH_NAME,
    _KEY_ADD_STYLE_NAME,
    _KEY_PIXEL_SIZE,
    _KEY_POINT_SIZE,
    _KEY_RESOLUTION_X,
    _KEY_RESOLUTION_Y,
    _KEY_SPACING,
    _KEY_AVERAGE_WIDTH,
    _KEY_CHARSET_REGISTRY,
    _KEY_CHARSET_ENCODING,
]


def _check_key(key: str):
    if not key.replace('_', '').isalnum():
        raise BdfPropKeyError(key, 'contains illegal characters')


def _check_value(key: str, value: str | int):
    if key in _STR_VALUE_KEYS:
        if not isinstance(value, str):
            raise BdfPropValueError(key, value, f"expected type 'str', got '{type(value).__name__}' instead")
    elif key in _INT_VALUE_KEYS:
        if not isinstance(value, int):
            raise BdfPropValueError(key, value, f"expected type 'int', got '{type(value).__name__}' instead")
    else:
        if not isinstance(value, str) and not isinstance(value, int):
            raise BdfPropValueError(key, value, f"expected type 'str | int', got '{type(value).__name__}' instead")
    if key in _XLFD_FONT_NAME_STR_VALUE_KEYS:
        matched = re.search(r'[-?*,"]', value)
        if matched is not None:
            raise BdfPropValueError(key, value, f"contains illegal characters '{matched.group()}'")


class BdfProperties(UserDict[str, str | int]):
    def __init__(
            self,
            data: dict[str, str | int] = None,
            comments: list[str] = None,
    ):
        """
        :param data:
            The keys and values used for initialization.
        :param comments:
            The comments.
        """
        super().__init__(data)
        if comments is None:
            comments = []
        self.comments = comments

    def __getitem__(self, key: str) -> str | int:
        key = key.upper()
        _check_key(key)
        return super().__getitem__(key)

    def __setitem__(self, key: str, value: str | int | None):
        key = key.upper()
        _check_key(key)
        if value is None:
            self.pop(key, None)
        else:
            _check_value(key, value)
            super().__setitem__(key, value)

    @property
    def foundry(self) -> str | None:
        return self.get(_KEY_FOUNDRY, None)

    @foundry.setter
    def foundry(self, value: str | None):
        self[_KEY_FOUNDRY] = value

    @property
    def family_name(self) -> str | None:
        return self.get(_KEY_FAMILY_NAME, None)

    @family_name.setter
    def family_name(self, value: str | None):
        self[_KEY_FAMILY_NAME] = value

    @property
    def weight_name(self) -> str | None:
        return self.get(_KEY_WEIGHT_NAME, None)

    @weight_name.setter
    def weight_name(self, value: str | None):
        self[_KEY_WEIGHT_NAME] = value

    @property
    def slant(self) -> str | None:
        return self.get(_KEY_SLANT, None)

    @slant.setter
    def slant(self, value: str | None):
        self[_KEY_SLANT] = value

    @property
    def setwidth_name(self) -> str | None:
        return self.get(_KEY_SETWIDTH_NAME, None)

    @setwidth_name.setter
    def setwidth_name(self, value: str | None):
        self[_KEY_SETWIDTH_NAME] = value

    @property
    def add_style_name(self) -> str | None:
        return self.get(_KEY_ADD_STYLE_NAME, None)

    @add_style_name.setter
    def add_style_name(self, value: str | None):
        self[_KEY_ADD_STYLE_NAME] = value

    @property
    def pixel_size(self) -> int | None:
        return self.get(_KEY_PIXEL_SIZE, None)

    @pixel_size.setter
    def pixel_size(self, value: int | None):
        self[_KEY_PIXEL_SIZE] = value

    @property
    def point_size(self) -> int | None:
        return self.get(_KEY_POINT_SIZE, None)

    @point_size.setter
    def point_size(self, value: int | None):
        self[_KEY_POINT_SIZE] = value

    @property
    def resolution_x(self) -> int | None:
        return self.get(_KEY_RESOLUTION_X, None)

    @resolution_x.setter
    def resolution_x(self, value: int | None):
        self[_KEY_RESOLUTION_X] = value

    @property
    def resolution_y(self) -> int | None:
        return self.get(_KEY_RESOLUTION_Y, None)

    @resolution_y.setter
    def resolution_y(self, value: int | None):
        self[_KEY_RESOLUTION_Y] = value

    @property
    def spacing(self) -> str | None:
        return self.get(_KEY_SPACING, None)

    @spacing.setter
    def spacing(self, value: str | None):
        self[_KEY_SPACING] = value

    @property
    def average_width(self) -> int | None:
        return self.get(_KEY_AVERAGE_WIDTH, None)

    @average_width.setter
    def average_width(self, value: int | None):
        self[_KEY_AVERAGE_WIDTH] = value

    @property
    def charset_registry(self) -> str | None:
        return self.get(_KEY_CHARSET_REGISTRY, None)

    @charset_registry.setter
    def charset_registry(self, value: str | None):
        self[_KEY_CHARSET_REGISTRY] = value

    @property
    def charset_encoding(self) -> str | None:
        return self.get(_KEY_CHARSET_ENCODING, None)

    @charset_encoding.setter
    def charset_encoding(self, value: str | None):
        self[_KEY_CHARSET_ENCODING] = value

    @property
    def default_char(self) -> int | None:
        return self.get(_KEY_DEFAULT_CHAR, None)

    @default_char.setter
    def default_char(self, value: int | None):
        self[_KEY_DEFAULT_CHAR] = value

    @property
    def font_ascent(self) -> int | None:
        return self.get(_KEY_FONT_ASCENT, None)

    @font_ascent.setter
    def font_ascent(self, value: int | None):
        self[_KEY_FONT_ASCENT] = value

    @property
    def font_descent(self) -> int | None:
        return self.get(_KEY_FONT_DESCENT, None)

    @font_descent.setter
    def font_descent(self, value: int | None):
        self[_KEY_FONT_DESCENT] = value

    @property
    def x_height(self) -> int | None:
        return self.get(_KEY_X_HEIGHT, None)

    @x_height.setter
    def x_height(self, value: int | None):
        self[_KEY_X_HEIGHT] = value

    @property
    def cap_height(self) -> int | None:
        return self.get(_KEY_CAP_HEIGHT, None)

    @cap_height.setter
    def cap_height(self, value: int | None):
        self[_KEY_CAP_HEIGHT] = value

    @property
    def font_version(self) -> str | None:
        return self.get(_KEY_FONT_VERSION, None)

    @font_version.setter
    def font_version(self, value: str | None):
        self[_KEY_FONT_VERSION] = value

    @property
    def copyright(self) -> str | None:
        return self.get(_KEY_COPYRIGHT, None)

    @copyright.setter
    def copyright(self, value: str | None):
        self[_KEY_COPYRIGHT] = value

    @property
    def notice(self) -> str | None:
        return self.get(_KEY_NOTICE, None)

    @notice.setter
    def notice(self, value: str | None):
        self[_KEY_NOTICE] = value

    def to_xlfd(self) -> str:
        tokens = ['']
        for key in _XLFD_FONT_NAME_KEYS_ORDER:
            tokens.append(str(self.get(key, '')))
        return '-'.join(tokens)

    def update_by_xlfd(self, font_name: str):
        if not font_name.startswith('-'):
            raise BdfXlfdError(font_name, "not starts with '-'")
        if font_name.count('-') != 14:
            raise BdfXlfdError(font_name, "there could only be 14 '-' in the name")
        tokens = font_name.removeprefix('-').split('-')
        for index, token in enumerate(tokens):
            key = _XLFD_FONT_NAME_KEYS_ORDER[index]
            if token == '':
                value = None
            else:
                if key in _XLFD_FONT_NAME_STR_VALUE_KEYS:
                    value = token
                else:
                    value = int(token)
            self[key] = value
