import color, mode2
from lex2 import Grammar, PatternRule, NocasePatternRule, RegionRule

class StringGrammar(Grammar):
    rules = [
        PatternRule(
            name=r'octal',
            pattern=r'\\[0-7]{3}',
        ),
        PatternRule(
            name=r'escaped',
            pattern=r'\\.',
        ),
    ]

class SqlGrammar(Grammar):
    rules = [
        PatternRule(name=r'comment', pattern=r'--.*$'),
        RegionRule(name=r'comment', start='/\*', grammar=Grammar(), end='\*/'),
        PatternRule(name=r'delimiter', pattern=r'[();,\.:\$\[\]]'),
        NocasePatternRule(name=r'attribute', pattern=r'(?:check|exists|unique|not null|default|primary key|minvalue|foreign key|references)(?![A-Za-z0-9_])'),
        NocasePatternRule(name=r'operator', pattern=r'(?:case|when|then|else|end|not|and|or|is not|is|in|not in)(?![A-Za-z0-9_])'),
        NocasePatternRule(name=r'keyword', pattern=r'(?:create database|create index|create sequence|create table|create trigger|create view|select|insert|update|delete|drop database|drop index|drop sequence|drop table|drop trigger|drop view|create user|alter user|drop user|drop function|grant|revoke|create function|create or replace function|create or replace view|create language|create operator|create type)(?![A-Za-z0-9_])'),
        NocasePatternRule(name=r'pseudokeyword', pattern=r'(?:returns|language|right join|left join|inner join|outer join|join|where|null|true|false|into|values|as|from|order by|asc|desc|limit|distinct|cascade|using|on)(?![A-Za-z0-9_])'),
        NocasePatternRule(name=r'type', pattern=r'(?:void|row|serial|varchar|float|integer|int|text|timestamptz|timestamp|datetz|date|timetz|time|boolean|bool)(?![A-Za-z0-9_])'),
        PatternRule(name=r'function', pattern=r'(?:nextval|current_timestamp|current_time|current_date)(?![A-Za-z0-9_])'),
        RegionRule(name=r'string', start="'", grammar=StringGrammar(), end="'"),
        RegionRule(name=r'quoted', start='"', grammar=StringGrammar(), end='"'),
        PatternRule(name=r'bareword', pattern=r'[A-Za-z0-9_]+'),
    ]

class Sql(mode2.Fundamental):
    grammar = SqlGrammar()
    opentoken  = 'delimiter'
    opentags   = {'(': ')', '[': ']', '{': '}'}
    closetoken = 'delimiter'
    closetags  = {')': '(', ']': '[', '}': '{'}
    def __init__(self, w):
        mode2.Fundamental.__init__(self, w)
        self.add_bindings('close-paren', (')',))
        self.add_bindings('close-brace', ('}',))
        self.add_bindings('close-bracket', (']',))
        self.colors = {
            'comment':        color.build('red', 'default'),
            'operator':       color.build('yellow', 'default'),
            'attribute':      color.build('magenta', 'default'),
            'keyword':        color.build('cyan', 'default'),
            'pseudokeyword':  color.build('cyan', 'default'),
            'type':           color.build('green', 'default'),
            'function':       color.build('yellow', 'default'),
            'quoted':         color.build('yellow', 'default'),
            'string.start':   color.build('green', 'default'),
            'string.null':    color.build('green', 'default'),
            'string.escaped': color.build('magenta', 'default'),
            'string.octal':   color.build('magenta', 'default'),
            'string.end':     color.build('green', 'default'),
            'bareword':       color.build('default', 'default'),
        }
    def name(self):
        return "Sql"