#!/usr/bin/python3

import sys, getopt
import manga.lib, manga.profile

def usage(out):
    out.write("usage: checkmanga [-hSi] [-p PROFILE] TAG\n")

prnm = ""
save = iact = False
opts, args = getopt.getopt(sys.argv[1:], "hSip:")
for o, a in opts:
    if o == "-h":
        usage(sys.stdout)
        sys.exit(0)
    elif o == "-S":
        save = True
    elif o == "-p":
        prnm = a
    elif o == "-i":
        iact = True
if prnm == "":
    profile = manga.profile.profile.last()
else:
    profile = manga.profile.profile.byname(prnm)
if len(args) < 1:
    usage(sys.stderr)
    sys.exit(1)
tag = args[0]

def getpages(pr):
    try:
        fp = pr.file("lastpages")
    except IOError:
        return {}
    ret = {}
    with fp:
        for ln in fp:
            words = manga.profile.splitline(ln)
            ret[tuple(words[:2])] = [int(x) for x in words[2:]]
    return ret

def savepages(pr, pages):
    with pr.file("lastpages", "w") as fp:
        for (libnm, id), pl in pages.iteritems():
            fp.write(manga.profile.consline(libnm, id, *[str(x) for x in pl]) + "\n")

def prompt(q):
    with open("/dev/tty", "r+") as tp:
        tp.write(q); tp.flush()
        return tp.readline().strip()

def lastpage(m):
    ret = []
    while isinstance(m, manga.lib.pagelist):
        ret.append(len(m) - 1)
        m = m[len(m) - 1]
    return ret

lastpages = getpages(profile)

changed = False
for mp in profile.bytag(tag):
    try:
        try:
            m = mp.open()
        except:
            sys.stderr.write("checkmanga: could not open %s/%s\n" % (libnm, id))
            continue
        nlp = lastpage(m)
        ch = False
        if (mp.libnm, mp.id) in lastpages:
            clp = lastpages[mp.libnm, mp.id]
            if clp != nlp:
                try:
                    clpn = u""
                    p = m
                    for pn in clp:
                        p = p[pn]
                        if clpn != "":
                            clpn += ", "
                        clpn += p.name
                    sys.stdout.write("%s %s: %s\n" % (mp.libnm, mp.id, str(clpn)))
                    ch = True
                except IndexError:
                    sys.stdout.write("%s %s: structure changed\n" % (mp.libnm, mp.id))
                    ch = True
        else:
            sys.stdout.write("%s %s: not previously checked\n" % (mp.libnm, mp.id))
            ch = True
        if ch:
            savecur = False
            if save:
                savecur = True
            elif iact:
                if prompt("Save? ")[:1].lower() == "y":
                    savecur = True
            if savecur:
                lastpages[mp.libnm, mp.id] = nlp
                changed = True
    except:
        sys.stderr.write("checkmanga: unexpected error when checking %s/%s:\n" % (mp.libnm, mp.id))
        raise
if changed:
    savepages(profile, lastpages)