#!/usr/bin/env python
import defapp
from os.path  import splitext, basename
from optparse import make_option as o
from tempfile import NamedTemporaryFile as Tmp

from gnuplot  import gnuplot, FORMATS

options = [
    o('-f', '--format', action='store', dest='format', type='choice',
      choices=FORMATS, help='output format'),
    ]

defaults = {
    'format' : 'show',
    'xrange' : (0.5, 32.5),
    'yrange' : (-0.05, 1.05),
    'xticks' : (0, 2),
    'yticks' : (0, 0.1),
    'title'  : None,
    'xlabel' : 'task set utilization cap (prior to inflation)',
    'ylabel' : 'ratio of schedulable task sets',
    }

def decode(name):
    params = {}
    parts = name.split('_')
    for p in parts:
        kv = p.split('=')
        k = kv[0]
        v = kv[1] if len(kv) > 1 else None
        params[k] = v
    return params

def get_data_tmpfile(datafile):
    """Removes all comments form datafile, stores result in a temp file.
    The temp file is returned."""
    count = 0
    f = open(datafile, 'r')
    d = Tmp()
    for line in f:
        if len(line) > 1 and line[0] != '#':
            d.write(line)
            count += 1
    f.close()
    d.flush()
    if count > 0:
        return d
    else:
        del d # removes temp file
        return None

def scenario_heading(conf):
    dist = 'unknown distribution'
    if 'dist' in conf:
        if conf['dist'] == 'uni':
            dist = 'uniformly distributed'
            if 'light' in conf:
                dist = dist + ' in [0.001, 0.1]'
            elif 'medium' in conf:
                dist = dist + ' in [0.1, 0.4]'
            elif 'heavy' in conf:
                dist = dist + ' in [0.5, 0.9]'
        elif conf['dist'] == 'bimo':
            dist = 'bimodially distributed'
            if 'light' in conf:
                dist = dist + 'in [0.001, 0.5] (8/9) and [0.5, 0.9] (1/9)'
            elif 'medium' in conf:
                dist = dist + 'in [0.001, 0.5] (6/9) and [0.5, 0.9] (3/9)'
            elif 'heavy' in conf:
                dist = dist + 'in [0.001, 0.5] (4/9) and [0.5, 0.9] (5/9)'
    return dist

class SchedPlotter(defapp.App):
    def __init__(self):
        defapp.App.__init__(self, options, defaults, no_std_opts=True)

    def plot(self, graphs, title, name, conf):
        gnuplot(graphs, title=title,
                xlabel=self.options.xlabel,
                ylabel=self.options.ylabel + 
                (' [soft]' if 'soft' in conf else ' [hard]'),
                xrange=self.options.xrange,
                yrange=self.options.yrange,
                xticks=self.options.xticks,
                yticks=self.options.yticks,
                format=self.options.format,
                fname=name)

    def plot_spec(self, tmpfile, name, conf):
        title = 'release overhead speculation: ' + scenario_heading(conf)
        graphs = [
            (tmpfile, 1, 2, 'G-EDF (100% release)'),
            (tmpfile, 1, 3, 'G-EDF ( 75% release)'),
            (tmpfile, 1, 4, 'G-EDF ( 50% release)'),
            (tmpfile, 1, 5, 'G-EDF ( 25% release)'),
            (tmpfile, 1, 6, 'G-EDF (  0% release)'),
            (tmpfile, 1, 7, 'G-EDF (no overheads)'),
            ]
        self.plot(graphs, title, name, conf)

    def plot_spec2(self, tmpfile, name, conf):
        title = 'service processor speculation: ' + scenario_heading(conf)
        graphs = [
            (tmpfile, 1, 2, 'G-EDF ( 25% release, 100% rest)'),
            (tmpfile, 1, 3, 'G-EDF (100% release,   0% rest)'),
            (tmpfile, 1, 4, 'G-EDF (service cpu, 100% preempt)'),
            (tmpfile, 1, 5, 'G-EDF (service cpu, 150% preempt)'),
            ]
        self.plot(graphs, title, name, conf)

    def plot_file(self, datafile):
        bname = basename(datafile)
        name, ext = splitext(bname)
        if ext != '.csv':
            self.err("Warning: '%s' doesn't look like a CSV file."
                     % bname)
        conf    = decode(name)
        tmpfile = get_data_tmpfile(datafile)
        if tmpfile:
            if 'spec' in conf:
                self.plot_spec(tmpfile.name, name, conf)
            elif 'spec2' in conf: 
                self.plot_spec2(tmpfile.name, name, conf)
            else:
                self.err("Skipped '%s'; unkown experiment type."
                         % bname)
            del tmpfile # removes temp file
        else:
            self.err("Skipped '%s'; it dosn't appear to contain data."
                     % bname)

    def default(self, _):
        for datafile in self.args:
            self.plot_file(datafile)

if __name__ == "__main__":
    SchedPlotter().launch()