"""Class for printing reports on profiled python code."""

# Written by James Roskind

# Based on prior profile module by Sjoerd Mullender...

#   which was hacked somewhat by: Guido van Rossum

# Copyright Disney Enterprises, Inc.  All Rights Reserved.

# Licensed to PSF under a Contributor Agreement

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,

# either express or implied.  See the License for the specific language

# governing permissions and limitations under the License.

import sys

import os

import time

import marshal

import re

from functools import cmp_to_key

__all__ = ["Stats"]

class Stats:

    """This class is used for creating reports from data generated by the

    Profile class.  It is a "friend" of that class, and imports data either

    by direct access to members of Profile class, or by reading in a dictionary

    that was emitted (via marshal) from the Profile class.

    The big change from the previous Profiler (in terms of raw functionality)

    is that an "add()" method has been provided to combine Stats from

    several distinct profile runs.  Both the constructor and the add()

    method now take arbitrarily many file names as arguments.

    All the print methods now take an argument that indicates how many lines

    to print.  If the arg is a floating point number between 0 and 1.0, then

    it is taken as a decimal percentage of the available lines to be printed

    (e.g., .1 means print 10% of all available lines).  If it is an integer,

    it is taken to mean the number of lines of data that you wish to have

    printed.

    The sort_stats() method now processes some additional options (i.e., in

    addition to the old -1, 0, 1, or 2 that are respectively interpreted as

    'stdname', 'calls', 'time', and 'cumulative').  It takes an arbitrary number

    of quoted strings to select the sort order.

    For example sort_stats('time', 'name') sorts on the major key of 'internal

    function time', and on the minor key of 'the name of the function'.  Look at

    the two tables in sort_stats() and get_sort_arg_defs(self) for more

    examples.

    All methods return self, so you can string together commands like:

        Stats('foo', 'goo').strip_dirs().sort_stats('calls').\

                            print_stats(5).print_callers(5)

    """

    def __init__(self, *args, stream=None):

        self.stream = stream or sys.stdout

        if not len(args):

            arg = None

        else:

            arg = args[0]

            args = args[1:]

        self.init(arg)

        self.add(*args)

    def init(self, arg):

        self.all_callees = None  # calc only if needed

        self.files = []

        self.fcn_list = None

        self.total_tt = 0

        self.total_calls = 0

        self.prim_calls = 0

        self.max_name_len = 0

        self.top_level = set()

        self.stats = {}

        self.sort_arg_dict = {}

        self.load_stats(arg)

        try:

            self.get_top_level_stats()

        except Exception:

            print("Invalid timing data %s" %

                  (self.files[-1] if self.files else ''), file=self.stream)

            raise

    def load_stats(self, arg):

        if arg is None:

            self.stats = {}

            return

        elif isinstance(arg, str):

            with open(arg, 'rb') as f:

                self.stats = marshal.load(f)

            try:

                file_stats = os.stat(arg)

                arg = time.ctime(file_stats.st_mtime) + "    " + arg

            except:  # in case this is not unix

                pass

            self.files = [arg]

        elif hasattr(arg, 'create_stats'):

            arg.create_stats()

            self.stats = arg.stats

            arg.stats = {}

        if not self.stats:

            raise TypeError("Cannot create or construct a %r object from %r"

                            % (self.__class__, arg))

        return

    def get_top_level_stats(self):

        for func, (cc, nc, tt, ct, callers) in self.stats.items():

            self.total_calls += nc

            self.prim_calls  += cc

            self.total_tt    += tt

            if ("jprofile", 0, "profiler") in callers:

                self.top_level.add(func)

            if len(func_std_string(func)) > self.max_name_len:

                self.max_name_len = len(func_std_string(func))

    def add(self, *arg_list):

        if not arg_list:

            return self

        for item in reversed(arg_list):

            if type(self) != type(item):

                item = Stats(item)

            self.files += item.files

            self.total_calls += item.total_calls

            self.prim_calls += item.prim_calls

            self.total_tt += item.total_tt

            for func in item.top_level:

                self.top_level.add(func)

            if self.max_name_len < item.max_name_len:

                self.max_name_len = item.max_name_len

            self.fcn_list = None

            for func, stat in item.stats.items():

                if func in self.stats:

                    old_func_stat = self.stats[func]

                else:

                    old_func_stat = (0, 0, 0, 0, {},)

                self.stats[func] = add_func_stats(old_func_stat, stat)

        return self

    def dump_stats(self, filename):

        """Write the profile data to a file we know how to load back."""

        with open(filename, 'wb') as f:

            marshal.dump(self.stats, f)

    # list the tuple indices and directions for sorting,

    # along with some printable description

    sort_arg_dict_default = {

              "calls"     : (((1,-1),              ), "call count"),

              "ncalls"    : (((1,-1),              ), "call count"),

              "cumtime"   : (((3,-1),              ), "cumulative time"),

              "cumulative": (((3,-1),              ), "cumulative time"),

              "file"      : (((4, 1),              ), "file name"),

              "filename"  : (((4, 1),              ), "file name"),

              "line"      : (((5, 1),              ), "line number"),

              "module"    : (((4, 1),              ), "file name"),

              "name"      : (((6, 1),              ), "function name"),

              "nfl"       : (((6, 1),(4, 1),(5, 1),), "name/file/line"),

              "pcalls"    : (((0,-1),              ), "primitive call count"),

              "stdname"   : (((7, 1),              ), "standard name"),

              "time"      : (((2,-1),              ), "internal time"),

              "tottime"   : (((2,-1),              ), "internal time"),

              }

    def get_sort_arg_defs(self):

        """Expand all abbreviations that are unique."""

        if not self.sort_arg_dict:

            self.sort_arg_dict = dict = {}

            bad_list = {}

            for word, tup in self.sort_arg_dict_default.items():

                fragment = word

                while fragment:

                    if not fragment:

                        break

                    if fragment in dict:

                        bad_list[fragment] = 0

                        break

                    dict[fragment] = tup

                    fragment = fragment[:-1]

            for word in bad_list:

                del dict[word]

        return self.sort_arg_dict

    def sort_stats(self, *field):

        if not field:

            self.fcn_list = 0

            return self

        if len(field) == 1 and isinstance(field[0], int):

            # Be compatible with old profiler

            field = [ {-1: "stdname",

                       0:  "calls",

                       1:  "time",

                       2:  "cumulative"}[field[0]] ]

        sort_arg_defs = self.get_sort_arg_defs()

        sort_tuple = ()

        self.sort_type = ""

        connector = ""

        for word in field:

            sort_tuple = sort_tuple + sort_arg_defs[word][0]

            self.sort_type += connector + sort_arg_defs[word][1]

            connector = ", "

        stats_list = []

        for func, (cc, nc, tt, ct, callers) in self.stats.items():

            stats_list.append((cc, nc, tt, ct) + func +

                              (func_std_string(func), func))

        stats_list.sort(key=cmp_to_key(TupleComp(sort_tuple).compare))

        self.fcn_list = fcn_list = []

        for tuple in stats_list:

            fcn_list.append(tuple[-1])

        return self

    def reverse_order(self):

        if self.fcn_list:

            self.fcn_list.reverse()

        return self

    def strip_dirs(self):

        oldstats = self.stats

        self.stats = newstats = {}

        max_name_len = 0

        for func, (cc, nc, tt, ct, callers) in oldstats.items():

            newfunc = func_strip_path(func)

            if len(func_std_string(newfunc)) > max_name_len:

                max_name_len = len(func_std_string(newfunc))

            newcallers = {}

            for func2, caller in callers.items():

                newcallers[func_strip_path(func2)] = caller

            if newfunc in newstats:

                newstats[newfunc] = add_func_stats(

                                        newstats[newfunc],

                                        (cc, nc, tt, ct, newcallers))

            else:

                newstats[newfunc] = (cc, nc, tt, ct, newcallers)

        old_top = self.top_level

        self.top_level = new_top = set()

        for func in old_top:

            new_top.add(func_strip_path(func))

        self.max_name_len = max_name_len

        self.fcn_list = None

        self.all_callees = None

        return self

    def calc_callees(self):

        if self.all_callees:

            return

        self.all_callees = all_callees = {}

        for func, (cc, nc, tt, ct, callers) in self.stats.items():

            if not func in all_callees:

                all_callees[func] = {}

            for func2, caller in callers.items():

                if not func2 in all_callees:

                    all_callees[func2] = {}

                all_callees[func2][func]  = caller

        return

    #******************************************************************

    # The following functions support actual printing of reports

    #******************************************************************

    # Optional "amount" is either a line count, or a percentage of lines.

    def eval_print_amount(self, sel, list, msg):

        new_list = list

        if isinstance(sel, str):

            try:

                rex = re.compile(sel)

            except re.error:

                msg += "   <Invalid regular expression %r>\n" % sel

                return new_list, msg

            new_list = []

            for func in list:

                if rex.search(func_std_string(func)):

                    new_list.append(func)

        else:

            count = len(list)

            if isinstance(sel, float) and 0.0 <= sel < 1.0:

                count = int(count * sel + .5)

                new_list = list[:count]

            elif isinstance(sel, int) and 0 <= sel < count:

                count = sel

                new_list = list[:count]

        if len(list) != len(new_list):

            msg += "   List reduced from %r to %r due to restriction <%r>\n" % (

                len(list), len(new_list), sel)

        return new_list, msg

    def get_print_list(self, sel_list):

        width = self.max_name_len

        if self.fcn_list:

            stat_list = self.fcn_list[:]

            msg = "   Ordered by: " + self.sort_type + '\n'

        else:

            stat_list = list(self.stats.keys())

            msg = "   Random listing order was used\n"

        for selection in sel_list:

            stat_list, msg = self.eval_print_amount(selection, stat_list, msg)

        count = len(stat_list)

        if not stat_list:

            return 0, stat_list

        print(msg, file=self.stream)

        if count < len(self.stats):

            width = 0

            for func in stat_list:

                if  len(func_std_string(func)) > width:

                    width = len(func_std_string(func))

        return width+2, stat_list

    def print_stats(self, *amount):

        for filename in self.files:

            print(filename, file=self.stream)

        if self.files:

            print(file=self.stream)

        indent = ' ' * 8

        for func in self.top_level:

            print(indent, func_get_function_name(func), file=self.stream)

        print(indent, self.total_calls, "function calls", end=' ', file=self.stream)

        if self.total_calls != self.prim_calls:

            print("(%d primitive calls)" % self.prim_calls, end=' ', file=self.stream)

        print("in %.3f seconds" % self.total_tt, file=self.stream)

        print(file=self.stream)

        width, list = self.get_print_list(amount)

        if list:

            self.print_title()

            for func in list:

                self.print_line(func)

            print(file=self.stream)

            print(file=self.stream)

        return self

    def print_callees(self, *amount):

        width, list = self.get_print_list(amount)

        if list:

            self.calc_callees()

            self.print_call_heading(width, "called...")

            for func in list:

                if func in self.all_callees:

                    self.print_call_line(width, func, self.all_callees[func])

                else:

                    self.print_call_line(width, func, {})

            print(file=self.stream)

            print(file=self.stream)

        return self

    def print_callers(self, *amount):

        width, list = self.get_print_list(amount)

        if list:

            self.print_call_heading(width, "was called by...")

            for func in list:

                cc, nc, tt, ct, callers = self.stats[func]

                self.print_call_line(width, func, callers, "<-")

            print(file=self.stream)

            print(file=self.stream)

        return self

    def print_call_heading(self, name_size, column_title):

        print("Function ".ljust(name_size) + column_title, file=self.stream)

        # print sub-header only if we have new-style callers

        subheader = False

        for cc, nc, tt, ct, callers in self.stats.values():

            if callers:

                value = next(iter(callers.values()))

                subheader = isinstance(value, tuple)

                break

        if subheader:

            print(" "*name_size + "    ncalls  tottime  cumtime", file=self.stream)

    def print_call_line(self, name_size, source, call_dict, arrow="->"):

        print(func_std_string(source).ljust(name_size) + arrow, end=' ', file=self.stream)

        if not call_dict:

            print(file=self.stream)

            return

        clist = sorted(call_dict.keys())

        indent = ""

        for func in clist:

            name = func_std_string(func)

            value = call_dict[func]

            if isinstance(value, tuple):

                nc, cc, tt, ct = value

                if nc != cc:

                    substats = '%d/%d' % (nc, cc)

                else:

                    substats = '%d' % (nc,)

                substats = '%s %s %s  %s' % (substats.rjust(7+2*len(indent)),

                                             f8(tt), f8(ct), name)

                left_width = name_size + 1

            else:

                substats = '%s(%r) %s' % (name, value, f8(self.stats[func][3]))

                left_width = name_size + 3

            print(indent*left_width + substats, file=self.stream)

            indent = " "

    def print_title(self):

        print('   ncalls  tottime  percall  cumtime  percall', end=' ', file=self.stream)

        print('filename:lineno(function)', file=self.stream)

    def print_line(self, func):  # hack: should print percentages

        cc, nc, tt, ct, callers = self.stats[func]

        c = str(nc)

        if nc != cc:

            c = c + '/' + str(cc)

        print(c.rjust(9), end=' ', file=self.stream)

        print(f8(tt), end=' ', file=self.stream)

        if nc == 0:

            print(' '*8, end=' ', file=self.stream)

        else:

            print(f8(tt/nc), end=' ', file=self.stream)

        print(f8(ct), end=' ', file=self.stream)

        if cc == 0:

            print(' '*8, end=' ', file=self.stream)

        else:

            print(f8(ct/cc), end=' ', file=self.stream)

        print(func_std_string(func), file=self.stream)

class TupleComp:

    """This class provides a generic function for comparing any two tuples.

    Each instance records a list of tuple-indices (from most significant

    to least significant), and sort direction (ascending or decending) for

    each tuple-index.  The compare functions can then be used as the function

    argument to the system sort() function when a list of tuples need to be

    sorted in the instances order."""

    def __init__(self, comp_select_list):

        self.comp_select_list = comp_select_list

    def compare (self, left, right):

        for index, direction in self.comp_select_list:

            l = left[index]

            r = right[index]

            if l < r:

                return -direction

            if l > r:

                return direction

        return 0

#**************************************************************************

# func_name is a triple (file:string, line:int, name:string)

def func_strip_path(func_name):

    filename, line, name = func_name

    return os.path.basename(filename), line, name

def func_get_function_name(func):

    return func[2]

def func_std_string(func_name): # match what old profile produced

    if func_name[:2] == ('~', 0):

        # special case for built-in functions

        name = func_name[2]

        if name.startswith('<') and name.endswith('>'):

            return '{%s}' % name[1:-1]

        else:

            return name

    else:

        return "%s:%d(%s)" % func_name

#**************************************************************************

# The following functions combine statists for pairs functions.

# The bulk of the processing involves correctly handling "call" lists,

# such as callers and callees.

#**************************************************************************

def add_func_stats(target, source):

    """Add together all the stats for two profile entries."""

    cc, nc, tt, ct, callers = source

    t_cc, t_nc, t_tt, t_ct, t_callers = target

    return (cc+t_cc, nc+t_nc, tt+t_tt, ct+t_ct,

              add_callers(t_callers, callers))

def add_callers(target, source):

    """Combine two caller lists in a single list."""

    new_callers = {}

    for func, caller in target.items():

        new_callers[func] = caller

    for func, caller in source.items():

        if func in new_callers:

            if isinstance(caller, tuple):

                # format used by cProfile

                new_callers[func] = tuple([i[0] + i[1] for i in

                                           zip(caller, new_callers[func])])

            else:

                # format used by profile

                new_callers[func] += caller

        else:

            new_callers[func] = caller

    return new_callers

def count_calls(callers):

    """Sum the caller statistics to get total number of calls received."""

    nc = 0

    for calls in callers.values():

        nc += calls

    return nc

#**************************************************************************

# The following functions support printing of reports

#**************************************************************************

def f8(x):

    return "%8.3f" % x

#**************************************************************************

# Statistics browser added by ESR, April 2001

#**************************************************************************

if __name__ == '__main__':

    import cmd

    try:

        import readline

    except ImportError:

        pass

    class ProfileBrowser(cmd.Cmd):

        def __init__(self, profile=None):

            cmd.Cmd.__init__(self)

            self.prompt = "% "

            self.stats = None

            self.stream = sys.stdout

            if profile is not None:

                self.do_read(profile)

        def generic(self, fn, line):

            args = line.split()

            processed = []

            for term in args:

                try:

                    processed.append(int(term))

                    continue

                except ValueError:

                    pass

                try:

                    frac = float(term)

                    if frac > 1 or frac < 0:

                        print("Fraction argument must be in [0, 1]", file=self.stream)

                        continue

                    processed.append(frac)

                    continue

                except ValueError:

                    pass

                processed.append(term)

            if self.stats:

                getattr(self.stats, fn)(*processed)

            else:

                print("No statistics object is loaded.", file=self.stream)

            return 0

        def generic_help(self):

            print("Arguments may be:", file=self.stream)

            print("* An integer maximum number of entries to print.", file=self.stream)

            print("* A decimal fractional number between 0 and 1, controlling", file=self.stream)

            print("  what fraction of selected entries to print.", file=self.stream)

            print("* A regular expression; only entries with function names", file=self.stream)

            print("  that match it are printed.", file=self.stream)

        def do_add(self, line):

            if self.stats:

                try:

                    self.stats.add(line)

                except IOError as e:

                    print("Failed to load statistics for %s: %s" % (line, e), file=self.stream)

            else:

                print("No statistics object is loaded.", file=self.stream)

            return 0

        def help_add(self):

            print("Add profile info from given file to current statistics object.", file=self.stream)

        def do_callees(self, line):

            return self.generic('print_callees', line)

        def help_callees(self):

            print("Print callees statistics from the current stat object.", file=self.stream)

            self.generic_help()

        def do_callers(self, line):

            return self.generic('print_callers', line)

        def help_callers(self):

            print("Print callers statistics from the current stat object.", file=self.stream)

            self.generic_help()

        def do_EOF(self, line):

            print("", file=self.stream)

            return 1

        def help_EOF(self):

            print("Leave the profile brower.", file=self.stream)

        def do_quit(self, line):

            return 1

        def help_quit(self):

            print("Leave the profile brower.", file=self.stream)

        def do_read(self, line):

            if line:

                try:

                    self.stats = Stats(line)

                except OSError as err:

                    print(err.args[1], file=self.stream)

                    return

                except Exception as err:

                    print(err.__class__.__name__ + ':', err, file=self.stream)

                    return

                self.prompt = line + "% "

            elif len(self.prompt) > 2:

                line = self.prompt[:-2]

                self.do_read(line)

            else:

                print("No statistics object is current -- cannot reload.", file=self.stream)

            return 0

        def help_read(self):

            print("Read in profile data from a specified file.", file=self.stream)

            print("Without argument, reload the current file.", file=self.stream)

        def do_reverse(self, line):

            if self.stats:

                self.stats.reverse_order()

            else:

                print("No statistics object is loaded.", file=self.stream)

            return 0

        def help_reverse(self):

            print("Reverse the sort order of the profiling report.", file=self.stream)

        def do_sort(self, line):

            if not self.stats:

                print("No statistics object is loaded.", file=self.stream)

                return

            abbrevs = self.stats.get_sort_arg_defs()

            if line and all((x in abbrevs) for x in line.split()):

                self.stats.sort_stats(*line.split())

            else:

                print("Valid sort keys (unique prefixes are accepted):", file=self.stream)

                for (key, value) in Stats.sort_arg_dict_default.items():

                    print("%s -- %s" % (key, value[1]), file=self.stream)

            return 0

        def help_sort(self):

            print("Sort profile data according to specified keys.", file=self.stream)

            print("(Typing `sort' without arguments lists valid keys.)", file=self.stream)

        def complete_sort(self, text, *args):

            return [a for a in Stats.sort_arg_dict_default if a.startswith(text)]

        def do_stats(self, line):

            return self.generic('print_stats', line)

        def help_stats(self):

            print("Print statistics from the current stat object.", file=self.stream)

            self.generic_help()

        def do_strip(self, line):

            if self.stats:

                self.stats.strip_dirs()

            else:

                print("No statistics object is loaded.", file=self.stream)

        def help_strip(self):

            print("Strip leading path information from filenames in the report.", file=self.stream)

        def help_help(self):

            print("Show help for a given command.", file=self.stream)

        def postcmd(self, stop, line):

            if stop:

                return stop

            return None

    if len(sys.argv) > 1:

        initprofile = sys.argv[1]

    else:

        initprofile = None

    try:

        browser = ProfileBrowser(initprofile)

        for profile in sys.argv[2:]:

            browser.do_add(profile)

        print("Welcome to the profile statistics browser.", file=browser.stream)

        browser.cmdloop()

        print("Goodbye.", file=browser.stream)

    except KeyboardInterrupt:

        pass

# That's all, folks.