"""
    pygments.lexers.bqn
    ~~~~~~~~~~~~~~~~~~~

    Lexer for BQN.

    :copyright: Copyright 2006-2023 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

from pygments.lexer import RegexLexer
from pygments.token import Comment, Operator, Keyword, Name, String, Number, Punctuation, Whitespace

__all__ = ["BQNLexer"]


class BQNLexer(RegexLexer):
    """
    A simple BQN lexer.

    .. versionadded:: 2.16
    """

    name = "BQN"
    url = "https://mlochbaum.github.io/BQN/index.html"
    aliases = ["bqn"]
    filenames = ["*.bqn"]
    mimetypes = []

    tokens = {
        "root": [
            # Whitespace
            # ==========
            (r"\s+", Whitespace),
            #
            # Comment
            # =======
            # '#' is a comment that continues to the end of the line
            (r"#.*$", Comment.Single),
            #
            # Strings
            # =======
            (r"\'((\'\')|[^\'])*\'", String.Single),
            (r'"(("")|[^"])*"', String.Double),
            #
            # Null Character
            # ==============
            # Literal representation of the null character
            (r"@", String.Symbol),
            #
            # Punctuation
            # ===========
            # This token type is used for diamond, commas
            # and  array and list brackets and strand syntax
            (r"[\.⋄,\[\]⟨⟩‿]", Punctuation),
            #
            # Expression Grouping
            # ===================
            # Since this token type is important in BQN, it is not included in
            # the punctuation token type but rather in the following one
            (r"[\(\)]", String.Regex),
            #
            # Numbers
            # =======
            # Includes the numeric literals and the Nothing character
            (r"¯?([0-9]+\.?[0-9]+|[0-9]+)([Ee][¯]?[0-9]+)?|¯|∞|π|·", Number),
            #
            # Variables
            # =========
            (r"\b[a-z]\w*\b", Name.Variable),
            #
            # 1-Modifiers
            # ===========
            (r"[˙˜˘¨⌜⁼´˝`𝕣]", Name.Attribute),
            (r"\b_[a-zA-Z0-9]+\b", Name.Attribute),
            #
            # 2-Modifiers
            # ===========
            (r"[∘○⊸⟜⌾⊘◶⎉⚇⍟⎊]", Name.Property),
            (r"\b_[a-zA-Z0-9]+_\b", Name.Property),
            #
            # Functions
            # =========
            # The monadic or dyadic function primitives and function
            # operands and arguments, along with function self-reference
            (r"[+\-×÷\*√⌊⌈∧∨¬|≤<>≥=≠≡≢⊣⊢⥊∾≍⋈↑↓↕«»⌽⍉/⍋⍒⊏⊑⊐⊒∊⍷⊔!𝕎𝕏𝔽𝔾𝕊]", Operator),
            (r"[A-Z]\w*|•\w+\b", Operator),
            #
            # Constant
            # ========
            (r"˙", Name.Constant),
            #
            # Define/Export/Change
            # ====================
            (r"[←↩⇐]", Keyword.Declaration),
            #
            # Blocks
            # ======
            (r"[{}]", Keyword.Type),
            #
            # Extra characters
            # ================
            (r"[;:?𝕨𝕩𝕗𝕘𝕤]", Name.Entity),
            #
        ],
    }
