#
#   mem.py
#
#   Get instantaneous memory statistics (installed, total, free, available)
#

import re

from ..formatting import *
from .. import config

import logging
logger = logging.getLogger(__name__)

def parse_log():

    logger.debug("Starting memory section")
    section = Section("memory")
    
    table = Table()

    ram_b = os.sysconf('SC_PAGE_SIZE') * os.sysconf('SC_PHYS_PAGES')
    table.add_row(Row([Column("Installed"), Column(parsesize(ram_b))]))

    raw_mem = util.readlog(config.prefs['logs']['meminfo'])
    line_regex = re.compile("^Mem(\w+):\s*(\d*)\s*kB$")

    for line in raw_mem.splitlines():

        matches = line_regex.findall(line)

        if len(matches) > 0:
            logger.debug("Detected {0} memory of {1} kB".format(matches[0][0].lower(), matches[0][1]))
            table.add_row(Row([Column(matches[0][0]), Column(parsesize(float(matches[0][1])*1000))]))

    table.align_column(0, "right")
    section.append_table(table)

    logger.info("Finished memory section")
    return section