from mode import Fundamental
from lex import Grammar, PatternRule, NocasePatternRule, RegionRule, NocaseRegionRule
from mode.python import StringGrammar1, StringGrammar2

class CommentGrammar1(Grammar):
    rules = [PatternRule(r'data', r'(?:[^*]|\*(?!/))+')]
class CommentGrammar2(Grammar):
    rules = [PatternRule(r'data', r'(?:[^-]|-(?!-)|--(?!>))+')]

class KeywordGrammar(Grammar):
    rules = [
        PatternRule(r'octal', r'\\[0-7]{3}'),
        PatternRule(r'escaped', r'\\.'),
        RegionRule(r'string', "'", StringGrammar1, r"'"),
        RegionRule(r'string', '"', StringGrammar2, r'"'),
    ]

chr2 = '[-a-z0-9_]'

class CSSGrammar(Grammar):
    rules = [
        RegionRule(r'comment', '/\*', CommentGrammar1, '\*/'),
        RegionRule(r'comment', '<!--', CommentGrammar2, '-->'),
        NocasePatternRule(r'css.dimension', r'[+-]?(?:\d+|\d*\.\d+)[-a-z_][-a-z0-9_]*'),
        NocasePatternRule(r'css.percentage', r'[+-]?(?:\d+|\d*\.\d+)%%'),
        NocasePatternRule(r'css.length', r'[+-]?(?:\d+|\d*\.\d+)(?:em|ex|px|in|cm|mm|pt|pc)'),
        NocasePatternRule(r'css.hash', r'#' + chr2 + '+'),
        NocasePatternRule(r'css.real', r'[+-]?\d*\.\d+'),
        NocasePatternRule(r'css.int', r'[+-]?\d+'),
        NocasePatternRule(r'css.rule', r'@(?:page|media|import)'),
        NocasePatternRule(r'css.color', r'(?:aqua|black|blue|fuchsia|gray|green|lime|maroon|navy|olive|orange|purple|red|silver|teal|white|yellow|#\d{6}|#\d{3})(?!' + chr2 + ')'),

        NocasePatternRule(r'css.keyword', r'(?:url|rgba|rgb|counter)'),
        NocaseRegionRule(r'css.keyword', '(?:(?<=url)|(?<=rgba)|(?<=rgb)|(?<=counter))\(', KeywordGrammar, '\)'),

        NocasePatternRule(r'css.label', r"\.?" + chr2 + "+(?= *{)"),
        NocasePatternRule(r'css.ident', r"-?[a-z_]" + chr2 + "*"),
        NocasePatternRule(r'css.name', chr2 + "+"),
        NocasePatternRule(r'delimiter', r'[:;,{}()\[\]]|~=|\|=|='),
        RegionRule(r'css.string', "'", StringGrammar1, r"'"),
        RegionRule(r'css.string', '"', StringGrammar2, r'"'),
    ]

class CSS(Fundamental):
    name        = 'CSS'
    extensions  = ['.css']
    grammar     = CSSGrammar
    opentokens  = ('delimiter',)
    opentags    = {'(': ')', '[': ']', '{': '}'}
    closetokens = ('delimiter',)
    closetags   = {')': '(', ']': '[', '}': '{'}
    colors      = {
        'css.dimension':       ('magenta', 'default', 'bold'),
        'css.percentage':      ('magenta', 'default', 'bold'),
        'css.length':          ('magenta', 'default', 'bold'),
        'css.real':            ('magenta', 'default', 'bold'),
        'css.int':             ('magenta', 'default', 'bold'),
        'css.color':           ('magenta', 'default', 'bold'),
        'css.hash':            ('cyan', 'default', 'bold'),
        'css.rule':            ('cyan', 'default', 'bold'),
        'css.label':           ('cyan', 'default', 'bold'),
        'css.keyword':         ('cyan', 'default', 'bold'),
        'css.ident':           ('default', 'default'),
        'css.name':            ('default', 'default'),
        'css.keyword':         ('cyan', 'default', 'bold'),
        'css.keyword.start':   ('default', 'default', 'bold'),
        'css.keyword.null':    ('cyan', 'default', 'bold'),
        'css.keyword.octal':   ('magenta', 'default', 'bold'),
        'css.keyword.escaped': ('magenta', 'default', 'bold'),
        'css.keyword.end':     ('default', 'default', 'bold'),
    }
    _bindings = {
        'close-paren': (')',),
        'close-brace': ('}',),
        'close-bracket': (']',),
    }

install = CSS.install