#!/usr/bin/env python
""" Parse XML test log file.

This module serves as utility for other scripts.
"""
import collections
import re
import os.path
import sys
from xml.dom.minidom import parse

def cmp(a, b): return (a>b)-(a<b)

class TestInfo(object):

    def __init__(self, xmlnode):
        self.fixture = xmlnode.getAttribute("classname")
        self.name = xmlnode.getAttribute("name")
        self.value_param = xmlnode.getAttribute("value_param")
        self.type_param = xmlnode.getAttribute("type_param")

        custom_status = xmlnode.getAttribute("custom_status")
        failures = xmlnode.getElementsByTagName("failure")

        if len(custom_status) > 0:
            self.status = custom_status
        elif len(failures) > 0:
            self.status = "failed"
        else:
            self.status = xmlnode.getAttribute("status")

        if self.name.startswith("DISABLED_"):
            if self.status == 'notrun':
                self.status = "disabled"
            self.fixture = self.fixture.replace("DISABLED_", "")
            self.name = self.name.replace("DISABLED_", "")
        self.properties = {
            prop.getAttribute("name") : prop.getAttribute("value")
            for prop in xmlnode.getElementsByTagName("property")
            if prop.hasAttribute("name") and prop.hasAttribute("value")
        }
        self.metrix = {}
        self.parseLongMetric(xmlnode, "bytesIn");
        self.parseLongMetric(xmlnode, "bytesOut");
        self.parseIntMetric(xmlnode, "samples");
        self.parseIntMetric(xmlnode, "outliers");
        self.parseFloatMetric(xmlnode, "frequency", 1);
        self.parseLongMetric(xmlnode, "min");
        self.parseLongMetric(xmlnode, "median");
        self.parseLongMetric(xmlnode, "gmean");
        self.parseLongMetric(xmlnode, "mean");
        self.parseLongMetric(xmlnode, "stddev");
        self.parseFloatMetric(xmlnode, "gstddev");
        self.parseFloatMetric(xmlnode, "time");
        self.parseLongMetric(xmlnode, "total_memory_usage");

    def parseLongMetric(self, xmlnode, name, default = 0):
        if name in self.properties:
            self.metrix[name] = int(self.properties[name])
        elif xmlnode.hasAttribute(name):
            self.metrix[name] = int(xmlnode.getAttribute(name))
        else:
            self.metrix[name] = default

    def parseIntMetric(self, xmlnode, name, default = 0):
        if name in self.properties:
            self.metrix[name] = int(self.properties[name])
        elif xmlnode.hasAttribute(name):
            self.metrix[name] = int(xmlnode.getAttribute(name))
        else:
            self.metrix[name] = default

    def parseFloatMetric(self, xmlnode, name, default = 0):
        if name in self.properties:
            self.metrix[name] = float(self.properties[name])
        elif xmlnode.hasAttribute(name):
            self.metrix[name] = float(xmlnode.getAttribute(name))
        else:
            self.metrix[name] = default

    def parseStringMetric(self, xmlnode, name, default = None):
        if name in self.properties:
            self.metrix[name] = self.properties[name].strip()
        elif xmlnode.hasAttribute(name):
            self.metrix[name] = xmlnode.getAttribute(name).strip()
        else:
            self.metrix[name] = default

    def get(self, name, units="ms"):
        if name == "classname":
            return self.fixture
        if name == "name":
            return self.name
        if name == "fullname":
            return self.__str__()
        if name == "value_param":
            return self.value_param
        if name == "type_param":
            return self.type_param
        if name == "status":
            return self.status
        val = self.metrix.get(name, None)
        if not val:
            return val
        if name == "time":
            return self.metrix.get("time")
        if name in ["gmean", "min", "mean", "median", "stddev"]:
            scale = 1.0
            frequency = self.metrix.get("frequency", 1.0) or 1.0
            if units == "ms":
                scale = 1000.0
            if units == "us" or units == "mks":  # mks is typo error for microsecond (<= OpenCV 3.4)
                scale = 1000000.0
            if units == "ns":
                scale = 1000000000.0
            if units == "ticks":
                frequency = int(1)
                scale = int(1)
            return val * scale / frequency
        return val


    def dump(self, units="ms"):
        print("%s ->\t\033[1;31m%s\033[0m = \t%.2f%s" % (str(self), self.status, self.get("gmean", units), units))


    def getName(self):
        pos = self.name.find("/")
        if pos > 0:
            return self.name[:pos]
        return self.name


    def getFixture(self):
        if self.fixture.endswith(self.getName()):
            fixture = self.fixture[:-len(self.getName())]
        else:
            fixture = self.fixture
        if fixture.endswith("_"):
            fixture = fixture[:-1]
        return fixture


    def param(self):
        return '::'.join(filter(None, [self.type_param, self.value_param]))

    def shortName(self):
        name = self.getName()
        fixture = self.getFixture()
        return '::'.join(filter(None, [name, fixture]))


    def __str__(self):
        name = self.getName()
        fixture = self.getFixture()
        return '::'.join(filter(None, [name, fixture, self.type_param, self.value_param]))


    def __cmp__(self, other):
        r = cmp(self.fixture, other.fixture);
        if r != 0:
            return r
        if self.type_param:
            if other.type_param:
                r = cmp(self.type_param, other.type_param);
                if r != 0:
                     return r
            else:
                return -1
        else:
            if other.type_param:
                return 1
        if self.value_param:
            if other.value_param:
                r = cmp(self.value_param, other.value_param);
                if r != 0:
                     return r
            else:
                return -1
        else:
            if other.value_param:
                return 1
        return 0

    def __lt__(self, other):
        return self.__cmp__(other) == -1

# This is a Sequence for compatibility with old scripts,
# which treat parseLogFile's return value as a list.
class TestRunInfo(object):
    def __init__(self, properties, tests):
        self.properties = properties
        self.tests = tests

    def __len__(self):
        return len(self.tests)

    def __getitem__(self, key):
        return self.tests[key]

def parseLogFile(filename):
    log = parse(filename)

    properties = {
        attr_name[3:]: attr_value
        for (attr_name, attr_value) in log.documentElement.attributes.items()
        if attr_name.startswith('cv_')
    }

    tests = list(map(TestInfo, log.getElementsByTagName("testcase")))

    return TestRunInfo(properties, tests)


if __name__ == "__main__":
    if len(sys.argv) < 2:
        print("Usage:\n", os.path.basename(sys.argv[0]), "<log_name>.xml")
        exit(0)

    for arg in sys.argv[1:]:
        print("Processing {}...".format(arg))

        run = parseLogFile(arg)

        print("Properties:")

        for (prop_name, prop_value) in run.properties.items():
          print("\t{} = {}".format(prop_name, prop_value))

        print("Tests:")

        for t in sorted(run.tests):
            t.dump()

        print()