"""

lsprofcalltree.py - lsprof output which is readable by kcachegrind

Authors:

    * David Allouche <david <at> allouche.net>

    * Jp Calderone & Itamar Shtull-Trauring

    * Johan Dahlin

This software may be used and distributed according to the terms

of the GNU General Public License, incorporated herein by reference.

"""

from __future__ import absolute_import

from . import pycompat

def label(code):

    if isinstance(code, str):

        # built-in functions ('~' sorts at the end)

        return b'~' + pycompat.sysbytes(code)

    else:

        return b'%s %s:%d' % (

            pycompat.sysbytes(code.co_name),

            pycompat.sysbytes(code.co_filename),

            code.co_firstlineno,

        )

class KCacheGrind(object):

    def __init__(self, profiler):

        self.data = profiler.getstats()

        self.out_file = None

    def output(self, out_file):

        self.out_file = out_file

        out_file.write(b'events: Ticks\n')

        self._print_summary()

        for entry in self.data:

            self._entry(entry)

    def _print_summary(self):

        max_cost = 0

        for entry in self.data:

            totaltime = int(entry.totaltime * 1000)

            max_cost = max(max_cost, totaltime)

        self.out_file.write(b'summary: %d\n' % max_cost)

    def _entry(self, entry):

        out_file = self.out_file

        code = entry.code

        if isinstance(code, str):

            out_file.write(b'fi=~\n')

        else:

            out_file.write(b'fi=%s\n' % pycompat.sysbytes(code.co_filename))

        out_file.write(b'fn=%s\n' % label(code))

        inlinetime = int(entry.inlinetime * 1000)

        if isinstance(code, str):

            out_file.write(b'0 %d\n' % inlinetime)

        else:

            out_file.write(b'%d %d\n' % (code.co_firstlineno, inlinetime))

        # recursive calls are counted in entry.calls

        if entry.calls:

            calls = entry.calls

        else:

            calls = []

        if isinstance(code, str):

            lineno = 0

        else:

            lineno = code.co_firstlineno

        for subentry in calls:

            self._subentry(lineno, subentry)

        out_file.write(b'\n')

    def _subentry(self, lineno, subentry):

        out_file = self.out_file

        code = subentry.code

        out_file.write(b'cfn=%s\n' % label(code))

        if isinstance(code, str):

            out_file.write(b'cfi=~\n')

            out_file.write(b'calls=%d 0\n' % subentry.callcount)

        else:

            out_file.write(b'cfi=%s\n' % pycompat.sysbytes(code.co_filename))

            out_file.write(

                b'calls=%d %d\n' % (subentry.callcount, code.co_firstlineno)

            )

        totaltime = int(subentry.totaltime * 1000)

        out_file.write(b'%d %d\n' % (lineno, totaltime))