#!/usr/bin/env python

import sys
import os
import os.path
import csv
from optparse import OptionParser

fmttext = '%(value)7.2f (%(percentual)+6.1f%%)'
fmthtml = '%(value)7.2f <span style="color: #666; width: 55pt; display: inline-block; text-align: right; text-shadow: #999 1px 1px 3px;">(%(percentual)+0.1f%%)</span>'


parser = OptionParser(usage="%prog [options] <reference> <file2> .. <fileN>",
                      description="""\
Generate reports comparing two or more outputs of expedite.

Just run expedite and save output to a file and then feed them to this
program. The first file is used as base for comparison and other files
will print relative improvements.
""")
parser.add_option("-e", "--accepted-error",
                  help=("maximum error to accept as percentage 0.0-1.0. "
                        "[default=%default]"),
                  action="store", type="float", default=0.05)
parser.add_option("-r", "--report",
                  help=("kind of report to use. One of text or html. "
                        "[default=%default]"),
                  action="store", type="choice", default="text",
                  choices=["text", "html"])
parser.add_option("-F", "--format",
                  help=("format to use as python format string, "
                        "valid keys are: value and percentual. "
                        "[defaults: html=\"%s\", text=\"%s\"]" %
                        (fmthtml, fmttext)),
                  action="store", type="str", default=None)
parser.add_option("-C", "--no-color", dest="color",
                  help="do not use color in reports.",
                  action="store_false", default=True)

options, files = parser.parse_args()
if len(files) < 2:
    raise SystemExit("need at least 2 files to compare")

if options.format is None:
    if options.report == "html":
        options.format = fmthtml
    else:
        options.format = fmttext

ref_f = files[0]
others_f = files[1:]

max_test_name = 0
data = {}
tests = []
for f in files:
    d = data[f] = {}
    for row in csv.reader(open(f)):
        t = row[1].strip()
        if f == ref_f:
            tests.append(t)
        d[t] = float(row[0])
        max_test_name = max(len(t), max_test_name)

def report_text():
    test_name_fmt = "%%%ds:" % max_test_name

    fmtsize = len(options.format % {"value": 12345.67, "percentual": 1234.56})
    hdrfmt = "%%%d.%ds" % (fmtsize, fmtsize)

    print test_name_fmt % "\\",
    print "%7.7s" % (files[0][-7:],),
    for f in files[1:]:
        n, e = os.path.splitext(f)
        print hdrfmt % n[-fmtsize:],
    print

    if options.color and os.environ.get("TERM", "") in (
        "xterm", "xterm-color", "rxvt", "rxvt-unicode", "screen",
        "Eterm", "aterm", "gnome", "interix"):
        color_good = "\033[1;32m"
        color_bad = "\033[1;31m"
        color_equal = "\033[1;30m"
        color_reset = "\033[0m"
    else:
        color_good = ""
        color_bad = ""
        color_equal = ""
        color_reset = ""


    def print_row(test):
        print test_name_fmt % test,
        ref_val = data[ref_f][test]
        print "%7.2f" % ref_val,
        for f in others_f:
            try:
                val = data[f][test]
            except KeyError:
                print "-?????-",
                continue

            percent = (val - ref_val) / ref_val
            if percent < -options.accepted_error:
                c = color_bad
            elif percent > options.accepted_error:
                c = color_good
            else:
                c = color_equal

            fmt = options.format % {"value": val, "percentual": percent * 100}
            if len(fmt) < fmtsize:
                fmt = hdrfmt % fmt
            print "%s%s%s" % (c, fmt, color_reset),

        print

    for t in tests:
        print_row(t)


def report_html():
    import time

    fnames = [os.path.basename(f) for f in files]
    print """\
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>expedite comparison sheet: %(files)s</title>
  </head>
  <style type="text/css">
    table
    {
       border: 1px solid black;
       border-collapse: collapse;
    }
    thead
    {
       border-bottom: 1px solid black;
    }
    tr.overall-results
    {
       border-top: 1px solid black;
       font-weight: bold;
    }
    td.value, td.value-reference, td.value-missing, td.value-good, td.value-bad, td.value-equal
    {
       font-family: courier, monospaced;
       font-size: 10pt;
       text-align: right;
       border-left: 1px solid black;
       border-bottom: 1px dashed #ccc;
    }
    td.test-name, thead tr td { text-align: right; }\
"""
    if options.color:
        print """\
    td.value-good { background-color: #aaffaa; }
    td.value-bad { background-color: #ffaaaa; }
    td.value-missing { background-color: #ffffaa; }
    td.test-name, thead tr td
    {
       font-weight: bold;
       background-color: #d9d9d9;
       border-bottom: 1px dashed #ccc;
    }
"""

    print """
  </style>
  <body>
     <p>Comparison sheet for %(files)s, created at %(date)s.</p>
     <table>
       <thead>
         <tr>
           <td>\\</td>\
""" % {"files": ", ".join(fnames),
       "date": time.asctime(),
       }

    for f in fnames:
        print """\
           <td>%s</td>\
""" % f
    print """\
         </tr>
       </thead>
       <tbody>\
"""

    def print_row(test):
        ref_val = data[ref_f][test]
        if "EVAS SPEED" in test.upper():
            extra_cls = ' class="overall-results"'
        else:
            extra_cls = ""

        print """\
         <tr%s>
           <td class="test-name">%s</td>
           <td class="value-reference">%7.2f</td>\
""" % (extra_cls, test, ref_val)

        for f in others_f:
            try:
                val = data[f][test]
            except KeyError:
                print """\
           <td class="value-missing">-?????-</td>\
"""
                continue

            percent = (val - ref_val) / ref_val
            if percent < -options.accepted_error:
                c = 'bad'
            elif percent > options.accepted_error:
                c = 'good'
            else:
                c = 'equal'

            v = options.format % {"value": val, "percentual": percent * 100}

            print """\
           <td class="value-%s">%s</td>\
""" % (c, v)

        print """\
         </tr>\
"""

    for t in tests:
        print_row(t)

    print """\
       </tbody>
     </table>
  </body>
</html>
"""

if options.report == "text":
    report_text()
elif options.report == "html":
    report_html()
