#!/usr/bin/python3

import sys, os, io, getopt, ann, subprocess, tempfile
pj = os.path.join

def opentty():
    try:
        return io.TextIOWrapper(io.FileIO(os.open("/dev/tty", os.O_RDWR | os.O_NOCTTY), "r+"))
    except OSError as exc:
        sys.stderr.write("anndl: terminal not available for interactive input: %s\n" % (exc.strerror))
        sys.exit(1)

def choose(opts):
    tty.write("%d matches:\n" % (len(opts)))
    for i, anime in enumerate(opts):
        tty.write("%d. %s\n" % (i + 1, anime.name))
    tty.write("> ")
    tty.flush()
    resp = tty.readline().strip()
    if resp == "":
        return opts[0]
    if not resp.isdigit():
        sys.stderr.write("anndl: %s: not a number\n" % resp)
        sys.exit(1)
    n = int(resp) - 1
    if not 0 <= n < len(opts):
        sys.stderr.write("anndl: %s: no such option\n" % resp)
        sys.exit(1)
    return opts[n]

def prompt(line, default=""):
    tty.write(line)
    if line[-1:] != " ":
        if default != "":
            tty.write(" [%s]" % (default))
        tty.write(": ")
    tty.flush()
    resp = tty.readline().strip()
    if resp == "":
        return default
    return resp

def edit(string):
    fd, path = tempfile.mkstemp()
    try:
        with os.fdopen(fd, "w") as fp:
            fp.write(string)
        subprocess.run([os.getenv("EDITOR"), path])
        with open(path, "r") as fp:
            return fp.read()
    finally:
        os.unlink(path)

def usage(out):
    out.write("usage: anndl [-h] SERIES\n")

def main(argv):
    global tty

    opts, args = getopt.getopt(argv[1:], "h")
    for o, a in opts:
        if o == "-h":
            usage(sys.stdout)
            sys.exit(0)
    if len(args) < 1:
        usage(sys.stderr)
        sys.exit(1)
    name = args[0]
    tty = opentty()

    match = ann.getlist(name)
    if len(match) == 0:
        sys.stderr.write("anndl: could not find %s\n" % (name))
        sys.exit(1)
    elif len(match) == 1:
        get = match[0]
    elif len(match) < 10:
        get = choose(match)
    else:
        sys.stderr.write("anndl: %s matches %i series\n" % (name, len(match)))
        sys.exit(1)

    if get.eps is None:
        tty.write("could not find number of eps\n")
        if prompt("accept? ")[:1].lower() != "y":
            sys.exit(1)
    name = prompt("canonical name", get.name)
    sexpr = "\"" + r"L~%s[^0-9]*0*%%i([^0-9]*(\[^]]*\]|\([^\)]*\)|v2))*[^0-9]*\.(avi|ogm|mkv|mp4)$" + "\""
    sexpr = sexpr % (name.lower().replace(" ", ".*"))
    tty.write("sexpr: %s\n" % (sexpr))
    if prompt("accept? ")[:1].lower() != "y":
        sexpr = edit(sexpr)
        
    root = pj(os.getenv("HOME"), "dc/autodl/cur", name)
    dl = pj(root, ".autodl")

    try:
        os.mkdir(root)
    except OSError as exc:
        sys.stderr.write("anndl: %s: %s\n" % (root, exc.strerror))
        sys.exit(1)
    os.mkdir(dl)
    with open(pj(dl, "disabled"), "w") as fp:
        pass
    with open(pj(root, "nextep"), "w") as fp:
        fp.write("1\n")
    with open(pj(dl, "uarg"), "w") as fp:
        if get.eps is None:
            melen = 2
        else:
            melen = len(str(get.eps))
        fp.write("rename:auto:%s:$i:move:../autodl/cur/%s\n" % (name, melen, name))
    with open(pj(dl, "sexpr")) as fp:
        fp.write("%s\n" % sexpr)
    with open(pj(dl, "curep")) as fp:
        fp.write("1\n")
    if get.eps is not None:
        with open(pj(dl, "maxep")) as fp:
            fp.write("%i\n" % get.eps)
    if prompt("begin? ")[:1].lower() == "y":
        os.unlink(pj(dl, "disabled"))

if __name__ == "__main__":
    try:
        main(sys.argv)
    except KeyboardInterrupt:
        sys.exit(1)