# -*- coding: utf-8 -*-
"""
    pygments.lexers._postgres_builtins
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Self-updating data files for PostgreSQL lexer.

    :copyright: Copyright 2006-2013 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import re
import urllib.request, urllib.parse, urllib.error

# One man's constant is another man's variable.
SOURCE_URL = 'https://github.com/postgres/postgres/raw/master'
KEYWORDS_URL = SOURCE_URL + '/doc/src/sgml/keywords.sgml'
DATATYPES_URL = SOURCE_URL + '/doc/src/sgml/datatype.sgml'

def update_myself():
    data_file = list(fetch(DATATYPES_URL))
    datatypes = parse_datatypes(data_file)
    pseudos = parse_pseudos(data_file)

    keywords = parse_keywords(fetch(KEYWORDS_URL))
    update_consts(__file__, 'DATATYPES', datatypes)
    update_consts(__file__, 'PSEUDO_TYPES', pseudos)
    update_consts(__file__, 'KEYWORDS', keywords)

def parse_keywords(f):
    kw = []
    for m in re.finditer(
            r'\s*<entry><token>([^<]+)</token></entry>\s*'
            r'<entry>([^<]+)</entry>', f.read()):
        kw.append(m.group(1))

    if not kw:
        raise ValueError('no keyword found')

    kw.sort()
    return kw

def parse_datatypes(f):
    dt = set()
    for line in f:
        if '<sect1' in line:
            break
        if '<entry><type>' not in line:
            continue

        # Parse a string such as
        # time [ (<replaceable>p</replaceable>) ] [ without time zone ]
        # into types "time" and "without time zone"

        # remove all the tags
        line = re.sub("<replaceable>[^<]+</replaceable>", "", line)
        line = re.sub("<[^>]+>", "", line)

        # Drop the parts containing braces
        for tmp in [t for tmp in line.split('[')
                    for t in tmp.split(']') if "(" not in t]:
            for t in tmp.split(','):
                t = t.strip()
                if not t: continue
                dt.add(" ".join(t.split()))

    dt = list(dt)
    dt.sort()
    return dt

def parse_pseudos(f):
    dt = []
    re_start = re.compile(r'\s*<table id="datatype-pseudotypes-table">')
    re_entry = re.compile(r'\s*<entry><type>([^<]+)</></entry>')
    re_end = re.compile(r'\s*</table>')

    f = iter(f)
    for line in f:
        if re_start.match(line) is not None:
            break
    else:
        raise ValueError('pseudo datatypes table not found')

    for line in f:
        m = re_entry.match(line)
        if m is not None:
            dt.append(m.group(1))

        if re_end.match(line) is not None:
            break
    else:
        raise ValueError('end of pseudo datatypes table not found')

    if not dt:
        raise ValueError('pseudo datatypes not found')

    return dt

def fetch(url):
    return urllib.request.urlopen(url)

def update_consts(filename, constname, content):
    f = open(filename)
    lines = f.readlines()
    f.close()

    # Line to start/end inserting
    re_start = re.compile(r'^%s\s*=\s*\[\s*$' % constname)
    re_end = re.compile(r'^\s*\]\s*$')
    start = [ n for n, l in enumerate(lines) if re_start.match(l) ]
    if not start:
        raise ValueError("couldn't find line containing '%s = ['" % constname)
    if len(start) > 1:
        raise ValueError("too many lines containing '%s = ['" % constname)
    start = start[0] + 1

    end = [ n for n, l in enumerate(lines) if n >= start and re_end.match(l) ]
    if not end:
        raise ValueError("couldn't find line containing ']' after %s " % constname)
    end = end[0]

    # Pack the new content in lines not too long
    content = [repr(item) for item in content ]
    new_lines = [[]]
    for item in content:
        if sum(map(len, new_lines[-1])) + 2 * len(new_lines[-1]) + len(item) + 4 > 75:
            new_lines.append([])
        new_lines[-1].append(item)

    lines[start:end] = [ "    %s,\n" % ", ".join(items) for items in new_lines ]

    f = open(filename, 'w')
    f.write(''.join(lines))
    f.close()


# Autogenerated: please edit them if you like wasting your time.

KEYWORDS = [
    'ABORT', 'ABSOLUTE', 'ACCESS', 'ACTION', 'ADD', 'ADMIN', 'AFTER',
    'AGGREGATE', 'ALL', 'ALSO', 'ALTER', 'ALWAYS', 'ANALYSE', 'ANALYZE',
    'AND', 'ANY', 'ARRAY', 'AS', 'ASC', 'ASSERTION', 'ASSIGNMENT',
    'ASYMMETRIC', 'AT', 'ATTRIBUTE', 'AUTHORIZATION', 'BACKWARD', 'BEFORE',
    'BEGIN', 'BETWEEN', 'BIGINT', 'BINARY', 'BIT', 'BOOLEAN', 'BOTH', 'BY',
    'CACHE', 'CALLED', 'CASCADE', 'CASCADED', 'CASE', 'CAST', 'CATALOG',
    'CHAIN', 'CHAR', 'CHARACTER', 'CHARACTERISTICS', 'CHECK', 'CHECKPOINT',
    'CLASS', 'CLOSE', 'CLUSTER', 'COALESCE', 'COLLATE', 'COLLATION',
    'COLUMN', 'COMMENT', 'COMMENTS', 'COMMIT', 'COMMITTED', 'CONCURRENTLY',
    'CONFIGURATION', 'CONNECTION', 'CONSTRAINT', 'CONSTRAINTS', 'CONTENT',
    'CONTINUE', 'CONVERSION', 'COPY', 'COST', 'CREATE', 'CROSS', 'CSV',
    'CURRENT', 'CURRENT_CATALOG', 'CURRENT_DATE', 'CURRENT_ROLE',
    'CURRENT_SCHEMA', 'CURRENT_TIME', 'CURRENT_TIMESTAMP', 'CURRENT_USER',
    'CURSOR', 'CYCLE', 'DATA', 'DATABASE', 'DAY', 'DEALLOCATE', 'DEC',
    'DECIMAL', 'DECLARE', 'DEFAULT', 'DEFAULTS', 'DEFERRABLE', 'DEFERRED',
    'DEFINER', 'DELETE', 'DELIMITER', 'DELIMITERS', 'DESC', 'DICTIONARY',
    'DISABLE', 'DISCARD', 'DISTINCT', 'DO', 'DOCUMENT', 'DOMAIN', 'DOUBLE',
    'DROP', 'EACH', 'ELSE', 'ENABLE', 'ENCODING', 'ENCRYPTED', 'END',
    'ENUM', 'ESCAPE', 'EXCEPT', 'EXCLUDE', 'EXCLUDING', 'EXCLUSIVE',
    'EXECUTE', 'EXISTS', 'EXPLAIN', 'EXTENSION', 'EXTERNAL', 'EXTRACT',
    'FALSE', 'FAMILY', 'FETCH', 'FIRST', 'FLOAT', 'FOLLOWING', 'FOR',
    'FORCE', 'FOREIGN', 'FORWARD', 'FREEZE', 'FROM', 'FULL', 'FUNCTION',
    'FUNCTIONS', 'GLOBAL', 'GRANT', 'GRANTED', 'GREATEST', 'GROUP',
    'HANDLER', 'HAVING', 'HEADER', 'HOLD', 'HOUR', 'IDENTITY', 'IF',
    'ILIKE', 'IMMEDIATE', 'IMMUTABLE', 'IMPLICIT', 'IN', 'INCLUDING',
    'INCREMENT', 'INDEX', 'INDEXES', 'INHERIT', 'INHERITS', 'INITIALLY',
    'INLINE', 'INNER', 'INOUT', 'INPUT', 'INSENSITIVE', 'INSERT', 'INSTEAD',
    'INT', 'INTEGER', 'INTERSECT', 'INTERVAL', 'INTO', 'INVOKER', 'IS',
    'ISNULL', 'ISOLATION', 'JOIN', 'KEY', 'LABEL', 'LANGUAGE', 'LARGE',
    'LAST', 'LC_COLLATE', 'LC_CTYPE', 'LEADING', 'LEAST', 'LEFT', 'LEVEL',
    'LIKE', 'LIMIT', 'LISTEN', 'LOAD', 'LOCAL', 'LOCALTIME',
    'LOCALTIMESTAMP', 'LOCATION', 'LOCK', 'MAPPING', 'MATCH', 'MAXVALUE',
    'MINUTE', 'MINVALUE', 'MODE', 'MONTH', 'MOVE', 'NAME', 'NAMES',
    'NATIONAL', 'NATURAL', 'NCHAR', 'NEXT', 'NO', 'NONE', 'NOT', 'NOTHING',
    'NOTIFY', 'NOTNULL', 'NOWAIT', 'NULL', 'NULLIF', 'NULLS', 'NUMERIC',
    'OBJECT', 'OF', 'OFF', 'OFFSET', 'OIDS', 'ON', 'ONLY', 'OPERATOR',
    'OPTION', 'OPTIONS', 'OR', 'ORDER', 'OUT', 'OUTER', 'OVER', 'OVERLAPS',
    'OVERLAY', 'OWNED', 'OWNER', 'PARSER', 'PARTIAL', 'PARTITION',
    'PASSING', 'PASSWORD', 'PLACING', 'PLANS', 'POSITION', 'PRECEDING',
    'PRECISION', 'PREPARE', 'PREPARED', 'PRESERVE', 'PRIMARY', 'PRIOR',
    'PRIVILEGES', 'PROCEDURAL', 'PROCEDURE', 'QUOTE', 'RANGE', 'READ',
    'REAL', 'REASSIGN', 'RECHECK', 'RECURSIVE', 'REF', 'REFERENCES',
    'REINDEX', 'RELATIVE', 'RELEASE', 'RENAME', 'REPEATABLE', 'REPLACE',
    'REPLICA', 'RESET', 'RESTART', 'RESTRICT', 'RETURNING', 'RETURNS',
    'REVOKE', 'RIGHT', 'ROLE', 'ROLLBACK', 'ROW', 'ROWS', 'RULE',
    'SAVEPOINT', 'SCHEMA', 'SCROLL', 'SEARCH', 'SECOND', 'SECURITY',
    'SELECT', 'SEQUENCE', 'SEQUENCES', 'SERIALIZABLE', 'SERVER', 'SESSION',
    'SESSION_USER', 'SET', 'SETOF', 'SHARE', 'SHOW', 'SIMILAR', 'SIMPLE',
    'SMALLINT', 'SOME', 'STABLE', 'STANDALONE', 'START', 'STATEMENT',
    'STATISTICS', 'STDIN', 'STDOUT', 'STORAGE', 'STRICT', 'STRIP',
    'SUBSTRING', 'SYMMETRIC', 'SYSID', 'SYSTEM', 'TABLE', 'TABLES',
    'TABLESPACE', 'TEMP', 'TEMPLATE', 'TEMPORARY', 'TEXT', 'THEN', 'TIME',
    'TIMESTAMP', 'TO', 'TRAILING', 'TRANSACTION', 'TREAT', 'TRIGGER',
    'TRIM', 'TRUE', 'TRUNCATE', 'TRUSTED', 'TYPE', 'UNBOUNDED',
    'UNCOMMITTED', 'UNENCRYPTED', 'UNION', 'UNIQUE', 'UNKNOWN', 'UNLISTEN',
    'UNLOGGED', 'UNTIL', 'UPDATE', 'USER', 'USING', 'VACUUM', 'VALID',
    'VALIDATE', 'VALIDATOR', 'VALUE', 'VALUES', 'VARCHAR', 'VARIADIC',
    'VARYING', 'VERBOSE', 'VERSION', 'VIEW', 'VOLATILE', 'WHEN', 'WHERE',
    'WHITESPACE', 'WINDOW', 'WITH', 'WITHOUT', 'WORK', 'WRAPPER', 'WRITE',
    'XML', 'XMLATTRIBUTES', 'XMLCONCAT', 'XMLELEMENT', 'XMLEXISTS',
    'XMLFOREST', 'XMLPARSE', 'XMLPI', 'XMLROOT', 'XMLSERIALIZE', 'YEAR',
    'YES', 'ZONE',
    ]

DATATYPES = [
    'bigint', 'bigserial', 'bit', 'bit varying', 'bool', 'boolean', 'box',
    'bytea', 'char', 'character', 'character varying', 'cidr', 'circle',
    'date', 'decimal', 'double precision', 'float4', 'float8', 'inet',
    'int', 'int2', 'int4', 'int8', 'integer', 'interval', 'json', 'line',
    'lseg', 'macaddr', 'money', 'numeric', 'path', 'point', 'polygon',
    'real', 'serial', 'serial2', 'serial4', 'serial8', 'smallint',
    'smallserial', 'text', 'time', 'timestamp', 'timestamptz', 'timetz',
    'tsquery', 'tsvector', 'txid_snapshot', 'uuid', 'varbit', 'varchar',
    'with time zone', 'without time zone', 'xml',
    ]

PSEUDO_TYPES = [
    'any', 'anyelement', 'anyarray', 'anynonarray', 'anyenum', 'anyrange',
    'cstring', 'internal', 'language_handler', 'fdw_handler', 'record',
    'trigger', 'void', 'opaque',
    ]

# Remove 'trigger' from types
PSEUDO_TYPES = sorted(set(PSEUDO_TYPES) - set(map(str.lower, KEYWORDS)))

PLPGSQL_KEYWORDS = [
    'ALIAS', 'CONSTANT', 'DIAGNOSTICS', 'ELSIF', 'EXCEPTION', 'EXIT',
    'FOREACH', 'GET', 'LOOP', 'NOTICE', 'OPEN', 'PERFORM', 'QUERY', 'RAISE',
    'RETURN', 'REVERSE', 'SQLSTATE', 'WHILE',
    ]

if __name__ == '__main__':
    update_myself()

