#!/usr/bin/env python
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

from __future__ import print_function

# Copyright (c) 2016, Arvid Norberg
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in
#       the documentation and/or other materials provided with the distribution.
#     * Neither the name of the author nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

# this script can parse and generate reports from the alert log from a
# libtorrent session

import os
import sys
import math
from multiprocessing.pool import ThreadPool

thread_pool = ThreadPool(8)

output_dir = 'session_stats_report'

stat = open(sys.argv[1])
line = stat.readline()
print('looking for stats header')
while 'session stats header:' not in line:
    line = stat.readline()

print('found')
keys = line.split('session stats header:')[1].strip().split(', ')

try:
    os.mkdir(output_dir)
except Exception:
    pass
data_out = open(os.path.join(output_dir, 'counters.dat'), 'w+')

idx = 0
for line in stat:
    if 'session stats (' not in line:
        continue
    data_out.write(("%d\t" % idx) + line.split(' values): ')[1].strip().replace(', ', '\t') + '\n')
    idx += 1

data_out.close()

line_graph = 0
histogram = 1
stacked = 2
diff = 3

graph_colors = []

pattern = [[0, 0, 1], [0, 1, 0], [1, 0, 0], [1, 0, 1], [0, 1, 1], [1, 1, 0]]


def process_color(c, op):
    for i in range(3):
        if op == 0:
            c[i] = min(255, c[i] + 0xb0)
        if op == 2:
            c[i] = max(0, c[i] - 0x50)
    return c


for i in range(0, len(pattern) * 3):

    op = i / len(pattern)

    c = list(pattern[i % len(pattern)])
    for j in range(3):
        c[j] *= 0xff
    c = process_color(c, op)

    c = '#%02x%02x%02x' % (c[0], c[1], c[2])
    graph_colors.append(c)

line_colors = list(graph_colors)
line_colors.reverse()

gradient16_colors = []
for i in range(0, 16):
    f = i / 16.
    pi = 3.1415927
    r = max(int(255 * (math.sin(f * pi) + 0.2)), 0)
    g = max(int(255 * (math.sin((f - 0.5) * pi) + 0.2)), 0)
    b = max(int(255 * (math.sin((f + 0.5) * pi) + 0.2)), 0)
    c = '#%02x%02x%02x' % (min(r, 255), min(g, 255), min(b, 255))
    gradient16_colors.append(c)

gradient18_colors = []
for i in range(0, 18):
    f = i / 18.
    pi = 3.1415927
    r = max(int(255 * (math.sin(f * pi) + 0.2)), 0)
    g = max(int(255 * (math.sin((f - 0.5) * pi) + 0.2)), 0)
    b = max(int(255 * (math.sin((f + 0.5) * pi) + 0.2)), 0)
    c = '#%02x%02x%02x' % (min(r, 255), min(g, 255), min(b, 255))
    gradient18_colors.append(c)

gradient6_colors = []
for i in range(0, 6):
    f = i / 6.
    c = '#%02x%02x%02x' % (min(int(255 * (-2 * f + 2)), 255), min(int(255 * (2 * f)), 255), 100)
    gradient6_colors.append(c)


def plot_fun(script):
    ret = os.system('gnuplot "%s" 2>/dev/null' % script)
    if ret != 0 and ret != 256:
        print('gnuplot failed: %d\n' % ret)
        raise Exception("abort")

    sys.stdout.write('.')
    sys.stdout.flush()


def to_title(key):
    return key.replace('_', ' ').replace('.', ' - ')


def gen_report(name, unit, lines, short_unit, generation, log_file, options):
    filename = os.path.join(output_dir, '%s_%04d.png' % (name, generation))
    thumb = os.path.join(output_dir, '%s_%04d_thumb.png' % (name, generation))

    # don't re-render a graph unless the logfile has changed
    try:
        dst1 = os.stat(filename)
        dst2 = os.stat(thumb)
        src = os.stat(log_file)

        if dst1.st_mtime > src.st_mtime and dst2.st_mtime > src.st_mtime:
            sys.stdout.write('.')
            return None

    except Exception:
        pass

    script = os.path.join(output_dir, '%s_%04d.gnuplot' % (name, generation))
    out = open(script, 'wb')
    print("set term png size 1200,700", file=out)
    print('set output "%s"' % filename, file=out)
    if 'allow-negative' not in options:
        print('set yrange [0:*]', file=out)
    print("set tics nomirror", file=out)
    print("set key box", file=out)
    print("set key left top", file=out)

    colors = graph_colors
    if options['type'] == line_graph:
        colors = line_colors

    try:
        if options['colors'] == 'gradient16':
            colors = gradient16_colors
        elif options['colors'] == 'gradient6':
            colors = gradient6_colors
        if options['colors'] == 'gradient18':
            colors = gradient18_colors
    except Exception:
        pass

    if options['type'] == histogram:
        binwidth = options['binwidth']
        numbins = int(options['numbins'])

        print('binwidth=%f' % binwidth, file=out)
        print('set boxwidth binwidth', file=out)
        print('bin(x,width)=width*floor(x/width) + binwidth/2', file=out)
        print('set xrange [0:%f]' % (binwidth * numbins), file=out)
        print('set xlabel "%s"' % unit, file=out)
        print('set ylabel "number"', file=out)

        k = lines[0]
        try:
            column = keys.index(k) + 2
        except Exception:
            print('"%s" not found' % k)
            return
        print('plot "%s" using (bin($%d,binwidth)):(1.0) smooth freq with boxes' % (log_file, column), file=out)
        print('', file=out)
        print('', file=out)
        print('', file=out)

    elif options['type'] == stacked:
        print('set xrange [0:*]', file=out)
        print('set ylabel "%s"' % unit, file=out)
        print('set xlabel "time (s)"', file=out)
        print('set format y "%%.1s%%c%s";' % short_unit, file=out)
        print('set style fill solid 1.0 noborder', file=out)
        print('plot', end=' ', file=out)
        first = True
        graph = ''
        plot_expression = ''
        color = 0
        for k in lines:
            try:
                column = keys.index(k) + 2
            except Exception:
                print('"%s" not found' % k)
                continue
            if not first:
                plot_expression = ', ' + plot_expression
                graph += '+'
            axis = 'x1y1'
            graph += '$%d' % column
            plot_expression = ' "%s" using 1:(%s) title "%s" axes %s with filledcurves x1 lc rgb "%s"' % (
                log_file, graph, to_title(k), axis, colors[color % len(colors)]) + plot_expression
            first = False
            color += 1
        print(plot_expression, file=out)
    elif options['type'] == diff:
        print('set xrange [0:*]', file=out)
        print('set ylabel "%s"' % unit, file=out)
        print('set xlabel "time (s)"', file=out)
        print('set format y "%%.1s%%c%s";' % short_unit, file=out)
        first = True
        graph = ''
        title = ''
        for k in lines:
            try:
                column = keys.index(k) + 2
            except Exception:
                print('"%s" not found' % k)
                continue
            if not first:
                graph += '-'
                title += ' - '
            graph += '$%d' % column
            title += to_title(k)
            first = False
        print('plot "%s" using 1:(%s) title "%s" with step' % (log_file, graph, title), file=out)
    else:
        print('set xrange [0:*]', file=out)
        print('set ylabel "%s"' % unit, file=out)
        print('set xlabel "time (s)"', file=out)
        print('set format y "%%.1s%%c%s";' % short_unit, file=out)
        print('plot', end=' ', file=out)
        first = True
        color = 0
        for k in lines:
            try:
                column = keys.index(k) + 2
            except Exception:
                print('"%s" not found' % k)
                continue
            if not first:
                print(', ', end=' ', file=out)
            axis = 'x1y1'
            print(' "%s" using 1:%d title "%s" axes %s with steps lc rgb "%s"' %
                  (log_file, column, to_title(k), axis, colors[color % len(colors)]), end=' ', file=out)
            first = False
            color += 1
        print('', file=out)

    print('set term png size 150,100', file=out)
    print('set output "%s"' % thumb, file=out)
    print('set key off', file=out)
    print('unset tics', file=out)
    print('set format x ""', file=out)
    print('set format y ""', file=out)
    print('set xlabel ""', file=out)
    print('set ylabel ""', file=out)
    print('set y2label ""', file=out)
    print('set rmargin 0', file=out)
    print('set lmargin 0', file=out)
    print('set tmargin 0', file=out)
    print('set bmargin 0', file=out)
    print("replot", file=out)
    out.close()
    return script


def gen_html(reports, generations):
    file = open(os.path.join(output_dir, 'index.html'), 'w+')

    css = '''img { margin: 0}
#head { display: block }
#graphs { white-space:nowrap; }
h1 { line-height: 1; display: inline }
h2 { line-height: 1; display: inline; font-size: 1em; font-weight: normal};'''

    print('<html><head><style type="text/css">%s</style></head><body>' % css, file=file)

    for i in reports:
        print('<div id="head"><h1>%s </h1><h2>%s</h2><div><div id="graphs">' % (i[0], i[3]), file=file)
        for g in generations:
            print('<a href="%s_%04d.png"><img src="%s_%04d_thumb.png"></a>' % (i[0], g, i[0], g), file=file)
        print('</div>', file=file)

    print('</body></html>', file=file)
    file.close()


reports = [

    ('torrents', 'num', '', 'number of torrents in different torrent states', [
        'ses.num_downloading_torrents',
        'ses.num_seeding_torrents',
        'ses.num_checking_torrents',
        'ses.num_stopped_torrents',
        'ses.num_upload_only_torrents',
        'ses.num_error_torrents',
        'ses.num_queued_seeding_torrents',
        'ses.num_queued_download_torrents'
    ], {'type': stacked}),

    ('peers', 'num', '', 'num connected peers', [
     'peer.num_peers_connected', 'peer.num_peers_half_open'], {'type': stacked}),
    ('peers_max', 'num', '', 'num connected peers', ['peer.num_peers_connected', 'peer.num_peers_half_open']),
    ('peer_churn', 'num', '', 'connecting and disconnecting peers',
     ['peer.num_peers_half_open', 'peer.connection_attempts', 'peer.boost_connection_attempts',
      'peer.missed_connection_attempts', 'peer.no_peer_connection_attempts']),
    ('new_peers', 'num', '', '', ['peer.incoming_connections', 'peer.connection_attempts']),
    ('connection_attempts', 'num', '', '', ['peer.connection_attempt_loops', 'peer.connection_attempts']),
    ('pieces', 'num', '', 'number completed pieces', [
     'ses.num_total_pieces_added', 'ses.num_piece_passed', 'ses.num_piece_failed']),
    ('disk_write_queue', 'Bytes', 'B', 'bytes queued up by peers, to be written to disk', ['disk.queued_write_bytes']),

    ('peers_requests', 'num', '', 'incoming piece request rate', [
        'peer.piece_requests',
        'peer.max_piece_requests',
        'peer.invalid_piece_requests',
        'peer.choked_piece_requests',
        'peer.cancelled_piece_requests'
    ]),

    ('peers_upload', 'num', '', 'number of peers by state wrt. uploading', [
        'peer.num_peers_up_disk',
        'peer.num_peers_up_interested',
        'peer.num_peers_up_unchoked_all',
        'peer.num_peers_up_unchoked_optimistic',
        'peer.num_peers_up_unchoked',
        'peer.num_peers_up_requests'
    ]),

    ('peers_download', 'num', '', 'number of peers by state wrt. downloading', [
        'peer.num_peers_down_interested',
        'peer.num_peers_down_unchoked',
        'peer.num_peers_down_requests',
        'peer.num_peers_down_disk'
    ]),

    ('peer_errors', 'num', '', 'number of peers by error that disconnected them', [
        'peer.disconnected_peers',
        'peer.eof_peers',
        'peer.connreset_peers',
        'peer.connrefused_peers',
        'peer.connaborted_peers',
        'peer.perm_peers',
        'peer.buffer_peers',
        'peer.unreachable_peers',
        'peer.broken_pipe_peers',
        'peer.addrinuse_peers',
        'peer.no_access_peers',
        'peer.invalid_arg_peers',
        'peer.aborted_peers'
    ], {'type': stacked}),

    ('peer_errors_incoming', 'num', '', 'number of peers by incoming or outgoing connection', [
        'peer.error_incoming_peers',
        'peer.error_outgoing_peers'
    ]),

    ('peer_errors_transport', 'num', '', 'number of peers by transport protocol', [
        'peer.error_tcp_peers',
        'peer.error_utp_peers'
    ]),

    ('peer_errors_encryption', 'num', '', 'number of peers by encryption level', [
        'peer.error_encrypted_peers',
        'peer.error_rc4_peers',
    ]),

    ('incoming requests', 'num', '', 'incoming 16kiB block requests', ['ses.num_incoming_request']),

    ('waste', 'downloaded bytes', 'B', 'proportion of all downloaded bytes that were wasted', [
        'net.recv_failed_bytes',
        'net.recv_redundant_bytes',
        'net.recv_ip_overhead_bytes'
    ], {'type': stacked}),

    ('waste by source', 'num wasted bytes', 'B', 'what is causing the waste', [
        'ses.waste_piece_timed_out',
        'ses.waste_piece_cancelled',
        'ses.waste_piece_unknown',
        'ses.waste_piece_seed',
        'ses.waste_piece_end_game',
        'ses.waste_piece_closing'
    ], {'type': stacked}),

    ('disk_time', '% of total disk job time', '%%', 'proportion of time spent by the disk thread',
     ['disk.disk_read_time', 'disk.disk_write_time', 'disk.disk_hash_time'], {'type': stacked}),
    ('disk_cache_hits', 'blocks (16kiB)', '', '', [
     'disk.num_blocks_read', 'disk.num_blocks_cache_hits'], {'type': stacked}),
    ('disk_cache', 'blocks (16kiB)', '', 'disk cache size and usage', [
     'disk.disk_blocks_in_use', 'disk.read_cache_blocks', 'disk.write_cache_blocks', 'disk.pinned_blocks']),
    ('disk_readback',
     '% of written blocks',
     '%%',
     'portion of written blocks that had to be read back for hash verification',
     ['disk.num_read_back']),
    ('disk_queue',
     'number of queued disk jobs',
     '',
     'num disk jobs',
     ['disk.num_write_jobs',
      'disk.num_read_jobs',
      'disk.num_jobs',
      'disk.queued_disk_jobs',
      'disk.blocked_disk_jobs']),
    ('disk fences', 'num', '', 'number of jobs currently blocked by a fence job', ['disk.blocked_disk_jobs']),
    # ('fence jobs', 'num', '', 'active fence jobs per type', ['move_storage', 'release_files', 'delete_files',
    #  'check_fastresume', 'save_resume_data', 'rename_file', 'stop_torrent', 'file_priority', 'clear_piece'],
    #  {'type':stacked}),
    ('disk threads', 'num', '', 'number of disk threads currently writing',
     ['disk.num_writing_threads', 'disk.num_running_threads']),
    # ('mixed mode', 'rate', 'B/s', 'rates by transport protocol',
    #  ['TCP up rate','TCP down rate','uTP up rate','uTP down rate','TCP up limit','TCP down limit']),

    ('connection_type', 'num', '', 'peers by transport protocol', [ \
        'peer.num_tcp_peers', \
        'peer.num_socks5_peers', \
        'peer.num_http_proxy_peers', \
        'peer.num_utp_peers', \
        'peer.num_i2p_peers', \
        'peer.num_ssl_peers', \
        'peer.num_ssl_socks5_peers', \
        'peer.num_ssl_http_proxy_peers', \
        'peer.num_ssl_utp_peers' \
    ]),

    # ('uTP delay', 'buffering delay', 's', 'network delays measured by uTP',
    #  ['uTP peak send delay','uTP peak recv delay', 'uTP avg send delay', 'uTP avg recv delay']),
    # ('uTP send delay histogram', 'buffering delay', 's', 'send delays measured by uTP',
    #  ['uTP avg send delay'], {'type': histogram, 'binwidth': 0.05, 'numbins': 100}),
    # ('uTP recv delay histogram', 'buffering delay', 's', 'receive delays measured by uTP',
    #  ['uTP avg recv delay'], {'type': histogram, 'binwidth': 0.05, 'numbins': 100}),

    ('uTP stats', 'num', '', 'number of uTP events', [ \
        'utp.utp_packet_loss', \
        'utp.utp_timeout', \
        'utp.utp_packets_in', \
        'utp.utp_packets_out', \
        'utp.utp_fast_retransmit', \
        'utp.utp_packet_resend', \
        'utp.utp_samples_above_target', \
        'utp.utp_samples_below_target', \
        'utp.utp_payload_pkts_in', \
        'utp.utp_payload_pkts_out', \
        'utp.utp_invalid_pkts_in', \
        'utp.utp_redundant_pkts_in' \
    ], {'type': stacked}),

    ('boost.asio messages', 'num events', '', 'number of messages posted', [ \
        'net.on_read_counter', \
        'net.on_write_counter', \
        'net.on_tick_counter', \
        'net.on_lsd_counter', \
        'net.on_lsd_peer_counter', \
        'net.on_udp_counter', \
        'net.on_accept_counter', \
        'net.on_disk_counter' \
    ], {'type': stacked}),

    ('send_buffer_sizes', 'num', '', '', [ \
        'sock_bufs.socket_send_size3', \
        'sock_bufs.socket_send_size4', \
        'sock_bufs.socket_send_size5', \
        'sock_bufs.socket_send_size6', \
        'sock_bufs.socket_send_size7', \
        'sock_bufs.socket_send_size8', \
        'sock_bufs.socket_send_size9', \
        'sock_bufs.socket_send_size10', \
        'sock_bufs.socket_send_size11', \
        'sock_bufs.socket_send_size12', \
        'sock_bufs.socket_send_size13', \
        'sock_bufs.socket_send_size14', \
        'sock_bufs.socket_send_size15', \
        'sock_bufs.socket_send_size16', \
        'sock_bufs.socket_send_size17', \
        'sock_bufs.socket_send_size18', \
        'sock_bufs.socket_send_size19', \
        'sock_bufs.socket_send_size20' \
    ], {'type': stacked, 'colors': 'gradient18'}),

    ('recv_buffer_sizes', 'num', '', '', [ \
        'sock_bufs.socket_recv_size3', \
        'sock_bufs.socket_recv_size4', \
        'sock_bufs.socket_recv_size5', \
        'sock_bufs.socket_recv_size6', \
        'sock_bufs.socket_recv_size7', \
        'sock_bufs.socket_recv_size8', \
        'sock_bufs.socket_recv_size9', \
        'sock_bufs.socket_recv_size10', \
        'sock_bufs.socket_recv_size11', \
        'sock_bufs.socket_recv_size12', \
        'sock_bufs.socket_recv_size13', \
        'sock_bufs.socket_recv_size14', \
        'sock_bufs.socket_recv_size15', \
        'sock_bufs.socket_recv_size16', \
        'sock_bufs.socket_recv_size17', \
        'sock_bufs.socket_recv_size18', \
        'sock_bufs.socket_recv_size19', \
        'sock_bufs.socket_recv_size20' \
    ], {'type': stacked, 'colors': 'gradient18'}),

    ('ARC', 'num pieces', '', '', [ \
        'disk.arc_mru_ghost_size', \
        'disk.arc_mru_size', \
        'disk.arc_volatile_size', \
        'disk.arc_mfu_size', \
        'disk.arc_mfu_ghost_size' \
    ], {'allow-negative': True}),

    ('request latency', 'us', '', 'latency from receiving requests to sending response', ['disk.request_latency']),
    ('incoming messages', 'num', '', 'number of received bittorrent messages, by type', [ \
        'ses.num_incoming_choke', \
        'ses.num_incoming_unchoke', \
        'ses.num_incoming_interested', \
        'ses.num_incoming_not_interested', \
        'ses.num_incoming_have', \
        'ses.num_incoming_bitfield', \
        'ses.num_incoming_request', \
        'ses.num_incoming_piece', \
        'ses.num_incoming_cancel', \
        'ses.num_incoming_dht_port', \
        'ses.num_incoming_suggest', \
        'ses.num_incoming_have_all', \
        'ses.num_incoming_have_none', \
        'ses.num_incoming_reject', \
        'ses.num_incoming_allowed_fast', \
        'ses.num_incoming_ext_handshake', \
        'ses.num_incoming_pex', \
        'ses.num_incoming_metadata', \
        'ses.num_incoming_extended' \
    ], {'type': stacked}),
    ('outgoing messages', 'num', '', 'number of sent bittorrent messages, by type', [ \
        'ses.num_outgoing_choke', \
        'ses.num_outgoing_unchoke', \
        'ses.num_outgoing_interested', \
        'ses.num_outgoing_not_interested', \
        'ses.num_outgoing_have', \
        'ses.num_outgoing_bitfield', \
        'ses.num_outgoing_request', \
        'ses.num_outgoing_piece', \
        'ses.num_outgoing_cancel', \
        'ses.num_outgoing_dht_port', \
        'ses.num_outgoing_suggest', \
        'ses.num_outgoing_have_all', \
        'ses.num_outgoing_have_none', \
        'ses.num_outgoing_reject', \
        'ses.num_outgoing_allowed_fast', \
        'ses.num_outgoing_ext_handshake', \
        'ses.num_outgoing_pex', \
        'ses.num_outgoing_metadata', \
        'ses.num_outgoing_extended' \
    ], {'type': stacked}),
    ('request in balance', 'num', '', 'request and piece message balance', [ \
        'ses.num_incoming_request', \
        'ses.num_outgoing_piece', \
        'ses.num_outgoing_reject', \
    ], {'type': diff}),
    ('request out balance', 'num', '', 'request and piece message balance', [ \
        'ses.num_outgoing_request', \
        'ses.num_incoming_piece', \
        'ses.num_incoming_reject', \
    ], {'type': diff}),

    # somewhat uninteresting stats
    # ('peer_dl_rates', 'num', '', 'peers split into download rate buckets',
    #  ['peers down 0', 'peers down 0-2', 'peers down 2-5', 'peers down 5-10', 'peers down 50-100', 'peers down 100-'],
    #  {'type':stacked, 'colors':'gradient6'}),
    # ('peer_dl_rates2', 'num', '', 'peers split into download rate buckets (only downloading peers)',
    #  ['peers down 0-2', 'peers down 2-5', 'peers down 5-10', 'peers down 50-100', 'peers down 100-'],
    #  {'type':stacked, 'colors':'gradient6'}),
    # ('peer_ul_rates', 'num', '', 'peers split into upload rate buckets',
    #  ['peers up 0', 'peers up 0-2', 'peers up 2-5', 'peers up 5-10', 'peers up 50-100', 'peers up 100-'],
    #  {'type':stacked, 'colors':'gradient6'}),
    # ('peer_ul_rates2', 'num', '', 'peers split into upload rate buckets (only uploading peers)',
    #  ['peers up 0-2', 'peers up 2-5', 'peers up 5-10', 'peers up 50-100', 'peers up 100-'],
    #  {'type':stacked, 'colors':'gradient6'}),

    ('piece_picker_invocations', 'invocations of piece picker', '', '', [ \
        'picker.reject_piece_picks', \
        'picker.unchoke_piece_picks', \
        'picker.incoming_redundant_piece_picks', \
        'picker.incoming_piece_picks', \
        'picker.end_game_piece_picks', \
        'picker.snubbed_piece_picks', \
        'picker.interesting_piece_picks', \
        'picker.hash_fail_piece_picks' \
    ], {'type': stacked}),
    ('piece_picker_loops', 'loops through piece picker', '', '', [ \
        'picker.piece_picker_partial_loops', \
        'picker.piece_picker_suggest_loops', \
        'picker.piece_picker_sequential_loops', \
        'picker.piece_picker_reverse_rare_loops', \
        'picker.piece_picker_rare_loops', \
        'picker.piece_picker_rand_start_loops', \
        'picker.piece_picker_rand_loops', \
        'picker.piece_picker_busy_loops' \
    ], {'type': stacked}),
    ('async_accept', 'number of outstanding accept calls', '', '', [ \
        'ses.num_outstanding_accept' \
    ]),

    # ('picker_full_partials_distribution', 'full pieces', '', '', ['num full partial pieces'],
    #  {'type': histogram, 'binwidth': 5, 'numbins': 120}),
    # ('picker_partials_distribution', 'partial pieces', '', '', ['num downloading partial pieces'],
    #  {'type': histogram, 'binwidth': 5, 'numbins': 120})
]

print('generating graphs')
g = 0
generations = []
scripts = []

print('[%s] %04d\r[' % (' ' * len(reports), g), end='')
for i in reports:
    try:
        options = i[5]
    except Exception:
        options = {}
    if 'type' not in options:
        options['type'] = line_graph

    script = gen_report(i[0], i[1], i[4], i[2], g, os.path.join(output_dir, 'counters.dat'), options)
    if script is not None:
        scripts.append(script)

generations.append(g)
g += 1

# run gnuplot on all scripts, in parallel
thread_pool.map(plot_fun, scripts)
scripts = []

print('\ngenerating html')
gen_html(reports, generations)