import os.path
#from method.shell import Interact
from mode import Fundamental
from lex import Grammar, PatternRule, RegionRule, PatternMatchRule
from tab import Tabber

class CommentGrammar(Grammar): pass
CommentGrammar.rules = [
    RegionRule(r'comment', r'{-', CommentGrammar, r'-}'), #nested
    PatternRule(r'data', r'(?:[^{-]|{(?!-)|-(?!}))+'),
]

class StringGrammar(Grammar):
    rules = [
        PatternRule(r'escaped', r'\\.'),
        PatternRule(r'data', r'[^\\"]+'),
    ]

class IdrisGrammar(Grammar):
    rules = [
        PatternRule(r'comment', r'--.*$'),
        RegionRule(r'comment', r'{-', CommentGrammar, r'-}'),

        # %access and such
        PatternMatchRule('x', r'(%[a-z]+)( +)([^ \t\n]+)', 'idris.keyword', 'spaces', 'idris.directive'),

        # probably too simple
        PatternRule(r'integer', r'-?[0-9]+'),
        PatternRule(r'float', r'-?[0-9]+\.[0-9]+(?:[eE][+-]?[0-9]+)?|-?[0-9]+[eE][+-]?[0-9]+'),
        PatternRule(r'char', r"'[^'\\]'"),

        PatternRule(r'spaces', r'[ \t]+'),
        PatternRule(r'eol', r'\n'),
        PatternRule(r'delimiter', r'[\[\](){},;]'),
        PatternRule(r'idris.xyz', r'(?:=>|->|<-|=|:)(?![-!#$%&\*\+./<=>\?@\\^|~:])'),

        PatternMatchRule('x', r"(module)( +)([a-zA-Z0-9_']+)", "idris.keyword", "spaces", "idris.module"),
        #PatternMatchRule('x', r"(record|data|codata|class)( +)([a-zA-Z0-9_']+)", "idris.keyword", "spaces", "idris.def"),

        # maybe wrong?
        PatternRule(r'idris.operator', r"[-!#$%&\*\+./<=>\?@\\^|~:]+"),

        RegionRule(r'string', r'"', StringGrammar, r'"'),
        PatternRule(r'idris.keyword', r"(?:with|where|using|try|trivial|total|then|term|syntax|solve|rewrite|refine|record|public|private|prefix|pattern|partial|parameters|of|namespace|mutual|module|let|intros|instance|infixr|infixl|infix|in|import|if|focus|exact|else|dsl|do|data|compute|codata|class|case|attack|abstract)(?![a-zA-Z0-9_'])"),

        PatternRule(r'idris.name', r"['_]?[A-Z][a-zA-Z0-9_']+"),
        PatternRule(r'idris.word', r"[a-zA-Z0-9_']+"),
    ]

class IdrisTabber(Tabber):
    pass

c_default = ('default', 'default')

lo_magenta = ('magenta202', 'default')
hi_magenta = ('magenta505', 'default')

lo_red = ('red300', 'default')
hi_red = ('red511', 'default')

hi_orange = ('yellow531', 'default')
lo_orange = ('yellow520', 'default')

hi_yellow = ('yellow551', 'default')
lo_yellow = ('yellow330', 'default')

lo_green = ('green030', 'default')
hi_green = ('green050', 'default')

lo_cyan = ('cyan033', 'default')
hi_cyan = ('cyan155', 'default')

lo_blue = ('blue113', 'default')
hi_blue = ('blue225', 'default')

class Idris(Fundamental):
    name        = 'Idris'
    extensions  = ['.idr']
    tabwidth    = 2
    commentc    = '--'
    grammar     = IdrisGrammar
    opentokens  = ('delimiter',)
    opentags    = {'(': ')', '{': '}', '[': ']'}
    closetokens = ('delimiter',)
    closetags   = {')': '(', '}': '{', ']': '['}
    colors      = {
        'idris.keyword': hi_magenta,
        'idris.module': hi_yellow,
        'idris.name': hi_green,
        'idris.xyz': hi_cyan,
        'idris.directive': hi_orange,
    }
    _bindings = {
        'close-paren':   (')',),
        'close-brace':   ('}',),
        'close-bracket': (']',),
    }
    #actions  = [HugsStart, HugsLoadFile]

install = Idris.install