import hashlib
import time
import uuid
import os.path

try:
    from fsdb import Fsdb
except ImportError:
    Fsdb = None
from rscli.httputils import req
from rscli import retroshare


def get_fsdb(args):
    if Fsdb is None:
        raise Exception("ERROR: library Fsdb is needed for file publishing")
    store_dir = os.path.expanduser("~/.config/rscli/store/default")
    return Fsdb(store_dir, fmode="660")


def filename_to_hash(args, dir_virtualname, filename):
    r = req(args, "/rsFiles/getSharedDirectories")
    dir_filename = [
        d["filename"] for d in r.json()["dirs"] if d["virtualname"] == dir_virtualname
    ][0]
    r = req(args, "/rsFiles/requestDirDetails", {"handle": 0})
    children = [
        c for c in r.json()["details"]["children"] if c["name"] != "[Extra List]"
    ]
    for possibile_root in children:
        r = req(
            args, "/rsFiles/requestDirDetails", {"handle": possibile_root["handle"]}
        )
        found = [
            c for c in r.json()["details"]["children"] if c["name"] == dir_filename
        ]
        if not found:
            raise Exception("Error: could not find shared file in RS")
        handle = found[0]["handle"]

    r = req(args, "/rsFiles/ForceDirectoryCheck")
    time.sleep(5)
    looking_for = filename.split(os.path.sep)
    hashlib
    for next_component in looking_for:
        r = req(args, "/rsFiles/requestDirDetails", {"handle": handle})
        found = [
            c for c in r.json()["details"]["children"] if c["name"] == next_component
        ]
        if not found:
            raise Exception("Error: could not find shared file in RS")
        handle = found[0]["handle"]
    r = req(args, "/rsFiles/requestDirDetails", {"handle": handle})
    filehash = r.json()["details"]["hash"]
    return filehash


def file_publish(args, fnames):
    fsdb = get_fsdb(args)
    virtualname_path = os.path.join(fsdb.fsdbRoot, "virtualname.txt")
    if os.path.exists(virtualname_path):
        virtualname = open(virtualname_path).read().strip()
    else:
        virtualname = "rscli-%s" % uuid.uuid4()
        open(virtualname_path, "w").write(virtualname)

    r = req(args, "/rsFiles/getSharedDirectories")
    if virtualname not in [shared["virtualname"] for shared in r.json()["dirs"]]:
        r = req(
            args,
            "/rsFiles/addSharedDirectory",
            {
                "dir": {
                    "filename": fsdb.fsdbRoot,
                    "virtualname": virtualname,
                    "shareflags": retroshare.DIR_FLAGS.ANONYMOUS_DOWNLOAD,
                }
            },
        )
        if not r.json()["retval"]:
            raise Exception("Error: could not create shared dir for default store")
        time.sleep(1)

    for fname in fnames:
        fsdb.add(fname)
        # print(filename_to_hash(args, virtualname, fsdb.get_file_path(digest)))

        h = hashlib.new("sha1")
        h.update(open(fname, "rb").read())
        yield h.hexdigest()

    r = req(args, "/rsFiles/ForceDirectoryCheck")


def get_file_link(args, hash_digest, fname=None, size=None):
    fsdb = get_fsdb(args)
    if fname is None:
        # TODO: check file name on filesystem
        fname = os.path.basename(fsdb.get_file_path(hash_digest))
    if size is None:
        size = os.stat(fsdb.get_file_path(hash_digest)).st_size
    return "retroshare://file?name=%s&size=%d&hash=%s" % (fname, size, hash_digest)