#!/usr/bin/env python

from collections import defaultdict
import csv
import sys

SLOT_SIZE = 300

def fint(a):
    try:
        return int(a)
    except:
        return -1

def counter():
    count = 0
    while True:
        yield count
        count += 1

node_id = counter()

pairs = defaultdict(set)

with open(sys.argv[1]) as f:
    reader = csv.reader(f)
    next(reader)
    for row in reader:
        _, a, _, b, _, slot = map(fint, row)
        p = (min(a,b), max(a,b))
        pairs[p].add(slot)

id_map = {}
traces = []
for (a, b), slots in pairs.items():
    contacts = []
    first = None
    prev = None
    nslots = 0
    for slot in slots:
        if first is None:
            first = prev = slot
            nslots = 1
        elif slot - prev == 1:
            prev = slot
            nslots += 1
        else:
            contacts.append((first, first+nslots))
            first = prev = slot
            nslots = 1

    contacts.append((first, first+nslots))

    if a not in id_map:
        id_map[a] = next(node_id)
    a = id_map[a]

    if b not in id_map:
        id_map[b] = next(node_id)
    b = id_map[b]

    for c in contacts:
        traces.append((c[0] * SLOT_SIZE, a, b, 1))
        traces.append((c[1] * SLOT_SIZE, a, b, 0))

traces.sort()

duration = traces[-1][0] + SLOT_SIZE
nodes = next(node_id)

path = sys.argv[1].split('.csv')[0] + '_reduced.csv'
with open(path, 'w') as f:
    writer = csv.writer(f)
    writer.writerow(['time', 'a', 'b', 'state'])
    writer.writerow([duration, -1, -1, nodes])
    for trace in traces:
        writer.writerow(trace)