#!/usr/bin/env python

# coding=utf-8

from lxml import etree

import argparse

import json

import datetime

import requests

import os.path

import re

import sys

import time

import uuid #@UnresolvedImport

from dateutil.parser import parse as parse_date_raw

from dateutil.tz import tzutc

import bisect

import logging

#class TweetExclude(object):

#    def __init__(self, id):

#        self.id = id

#

#    def __repr__(self):

#        return "<TweetExclude(id=%d)>" % (self.id)

LDT_CONTENT_REST_API_PATH = "api/ldt/1.0/contents/"

LDT_PROJECT_REST_API_PATH = "api/ldt/1.0/projects/"

DEFAULT_ANNOTATION_CHANNEL = 'ANNOT'

def parse_date(datestr):

    res = parse_date_raw(datestr)

    if res.tzinfo is None:

        res = res.replace(tzinfo=tzutc())

    return res

def get_logger():

    return logging.getLogger(__name__)

def get_filter(start_date, end_date, events, channels, user_whitelist):

    res = []

    #TODO: check timezone...

    if start_date:

        res.append({'name': 'ts', 'op': ">=", 'val':start_date.isoformat() })

    if end_date:

        res.append({'name': 'ts', 'op': "<=", 'val':end_date.isoformat() })

    if events:

        res.append({'name': 'event', 'op': "in", 'val':events })

    if channels:

        res.append({'name': 'channel', 'op': "in", 'val':channels })

    if user_whitelist:

        res.append({'name': 'user', 'op': "in", 'val':user_whitelist })

    return res

def set_logging(options, plogger=None, queue=None):

    logging_config = {

        "format" : '%(asctime)s %(levelname)s:%(name)s:%(message)s',

        "level" : max(logging.NOTSET, min(logging.CRITICAL, logging.WARNING - 10 * options.verbose + 10 * options.quiet)), #@UndefinedVariable

    }

    if options.logfile == "stdout":

        logging_config["stream"] = sys.stdout

    elif options.logfile == "stderr":

        logging_config["stream"] = sys.stderr

    else:

        logging_config["filename"] = options.logfile

    logger = plogger

    if logger is None:

        logger = get_logger() #@UndefinedVariable

    if len(logger.handlers) == 0:

        filename = logging_config.get("filename")

        if queue is not None:

            hdlr = QueueHandler(queue, True)

        elif filename:

            mode = logging_config.get("filemode", 'a')

            hdlr = logging.FileHandler(filename, mode) #@UndefinedVariable

        else:

            stream = logging_config.get("stream")

            hdlr = logging.StreamHandler(stream) #@UndefinedVariable

        fs = logging_config.get("format", logging.BASIC_FORMAT) #@UndefinedVariable

        dfs = logging_config.get("datefmt", None)

        fmt = logging.Formatter(fs, dfs) #@UndefinedVariable

        hdlr.setFormatter(fmt)

        logger.addHandler(hdlr)

        level = logging_config.get("level")

        if level is not None:

            logger.setLevel(level)

    options.debug = (options.verbose-options.quiet > 0)

    return logger

def set_logging_options(parser):

    parser.add_argument("-l", "--log", dest="logfile",

                      help="log to file", metavar="LOG", default="stderr")

    parser.add_argument("-v", dest="verbose", action="count",

                      help="verbose", default=0)

    parser.add_argument("-q", dest="quiet", action="count",

                      help="quiet", default=0)

def get_options():

    parser = argparse.ArgumentParser(description="All date should be given using iso8601 format. If no timezone is used, the date is considered as UTC")

    parser.add_argument("-f", "--file", dest="filename",

                      help="write export to file", metavar="FILE", default="project.ldt")

    parser.add_argument("-a", "--annot-url", dest="annot_url",

                      help="annotation server url", metavar="ANNOT-URL", required=True)

    parser.add_argument("-s", "--start-date", dest="start_date",

                      help="start date", metavar="START_DATE", default=None)

    parser.add_argument("-e", "--end-date", dest="end_date",

                      help="end date", metavar="END_DATE", default=None)

    parser.add_argument("-I", "--content-file", dest="content_file",

                      help="Content file", metavar="CONTENT_FILE")

    parser.add_argument("-c", "--content", dest="content",

                      help="Content url", metavar="CONTENT")

    parser.add_argument("-V", "--video-url", dest="video",

                      help="video url", metavar="VIDEO")

    parser.add_argument("-i", "--content-id", dest="content_id",

                      help="Content id", metavar="CONTENT_ID")

    parser.add_argument("-x", "--exclude", dest="exclude",

                      help="file containing the id to exclude", metavar="EXCLUDE")

    parser.add_argument("-C", "--color", dest="color",

                      help="Color code", metavar="COLOR", default="16763904")

    parser.add_argument("-H", "--channel", dest="channels",

                      help="Channel", metavar="CHANNEL", default=[DEFAULT_ANNOTATION_CHANNEL], action="append")

    parser.add_argument("-E", "--event", dest="events",

                      help="Event", metavar="EVENT", default=[], action="append")

    parser.add_argument("-D", "--duration", dest="duration", type=int,

                      help="Duration", metavar="DURATION", default=None)

    parser.add_argument("-n", "--name", dest="name",

                      help="Cutting name", metavar="NAME", default=u"annotations")

    parser.add_argument("-R", "--replace", dest="replace", action="store_true",

                      help="Replace annotation ensemble", default=False)

    parser.add_argument("-m", "--merge", dest="merge", action="store_true",

                      help="merge annotation ensemble, choose the first ensemble", default=False)

    parser.add_argument("-L", "--list-conf", dest="listconf",

                      help="list of file to process", metavar="LIST_CONF", default=None)

    parser.add_argument("-b", "--base-url", dest="base_url",

                      help="base URL of the platform", metavar="BASE_URL", default="http://ldt.iri.centrepompidou.fr/ldtplatform/")

    parser.add_argument("-p", "--project", dest="project_id",

                      help="Project id", metavar="PROJECT_ID", default=None)

    parser.add_argument("-P", "--post-param", dest="post_param",

                      help="Post param", metavar="POST_PARAM", default=None)

    parser.add_argument("-B", "--batch-size", dest="batch_size", type=int,

                      help="Batch size for annotation request", metavar="BATCH_SIZE", default=500)

    parser.add_argument("--user-whitelist", dest="user_whitelist", action="store",

                      help="A list of user screen name", metavar="USER_WHITELIST",default=None)

    parser.add_argument("--cut", dest="cuts", action="append",

                      help="A cut with the forma <ts in ms>::<duration>", metavar="CUT", default=[])

    set_logging_options(parser)

    return (parser.parse_args(), parser)

def find_delta(deltas, ts):

    i = bisect.bisect_right(deltas, (ts+1,0))

    if i:

        return deltas[i-1]

    return (0,0)

def parse_duration(s):

    try:

        return int(s)

    except ValueError:

        parts = s.split(":")

        if len(parts) < 2:

            raise ValueError("Bad duration format")

        time_params = {

            'hours': int(parts[0]),

            'minutes': int(parts[1]),

            'seconds': int(parts[2]) if len(parts)>2 else 0

        }

        return int(round(datetime.timedelta(**time_params).total_seconds()*1000))

def build_annotation_iterator(url, params, headers):

    page = 0

    page_nb = 1

    while page < page_nb:

        page += 1

        params['page'] = page

        resp = requests.get(url, params=params, headers=headers)

        if resp.status_code != requests.codes.ok:

            return

        resp_json = resp.json()

        page_nb = resp_json.get('total_pages', 1)

        for item in resp_json.get('objects', []):

            #TODO: add progress log

            yield item

if __name__ == "__main__" :

    (options, parser) = get_options()

    set_logging(options)

    get_logger().debug("OPTIONS : " + repr(options)) #@UndefinedVariable

    deltas = [(0,0)]

    total_delta = 0

    if options.cuts:

        cuts_raw = sorted([tuple([parse_duration(s) for s in c.split("::")]) for c in options.cuts])

        for c, d in cuts_raw:

            deltas.append((c+total_delta, -1))

            total_delta += d

            deltas.append((c+total_delta, total_delta))

    if len(sys.argv) == 1 or options.annot_url is None:

        parser.print_help()

        sys.exit(1)

    user_whitelist_file = options.user_whitelist

    user_whitelist = None

    annotation_url = options.annot_url

    if options.listconf:

        parameters = []

        confdoc = etree.parse(options.listconf)

        for node in confdoc.xpath("/annotation_export/file"):

            params = {}

            for snode in node:

                if snode.tag == "path":

                    params['content_file'] = snode.text

                    params['content_file_write'] = snode.text

                elif snode.tag == "project_id":

                    params['content_file'] = options.base_url + LDT_PROJECT_REST_API_PATH + snode.text + "/?format=json"

                    params['content_file_write'] = options.base_url + LDT_PROJECT_REST_API_PATH + snode.text + "/?format=json"

                    params['project_id'] = snode.text

                elif snode.tag == "start_date":

                    params['start_date'] = snode.text

                elif snode.tag == "end_date":

                    params['end_date'] = snode.text

                elif snode.tag == "duration":

                    params['duration'] = int(snode.text)

                elif snode.tag == "events":

                        params['events'] = [snode.text]

                elif snode.tag == "channels":

                    params['channels'] = [snode.text]

            if options.events or 'events' not in params :

                params['events'] = options.events

            if options.channels or 'channels' not in params :

                params['channels'] = options.channels

            parameters.append(params)

    else:

        if options.project_id:

            content_file = options.base_url + LDT_PROJECT_REST_API_PATH + options.project_id + "/?format=json"

        else:

            content_file = options.content_file

        parameters = [{

            'start_date'            : options.start_date,

            'end_date'              : options.end_date,

            'duration'              : options.duration,

            'events'                : options.events,

            'channels'              : options.channels,

            'content_file'          : content_file,

            'content_file_write'    : content_file,

            'project_id'            : options.project_id

        }]

    post_param = {}

    if options.post_param:

        post_param = json.loads(options.post_param)

    for params in parameters:

        get_logger().debug("PARAMETERS " + repr(params)) #@UndefinedVariable

        start_date_str = params.get("start_date",None)

        end_date_str = params.get("end_date", None)

        duration = params.get("duration", None)

        content_file = params.get("content_file", None)

        content_file_write = params.get("content_file_write", None)

        channels = list(set(params.get('channels', [DEFAULT_ANNOTATION_CHANNEL])))

        events = list(set(params.get('events', [])))

        if user_whitelist_file:

            with open(user_whitelist_file, 'r+') as f:

                user_whitelist = list(set([s.strip() for s in f]))

        start_date = None

        if start_date_str:

            start_date= parse_date(start_date_str)

        root = None

        ensemble_parent = None

        #to do : analyse situation ldt or iri ? filename set or not ?

        if content_file and content_file.find("http") == 0:

            get_logger().debug("url : " + content_file) #@UndefinedVariable

            r = requests.get(content_file, params=post_param)

            get_logger().debug("url response " + repr(r) + " content " + repr(r.text)) #@UndefinedVariable

            project = r.json()

            text_match = re.match(r"\<\?\s*xml.*?\?\>(.*)", project['ldt'], re.I|re.S)

            root = etree.fromstring(text_match.group(1) if text_match else project['ldt'])

        elif content_file and os.path.exists(content_file):

            doc = etree.parse(content_file)

            root = doc.getroot()

        content_id = None

        if root is None:

            root = etree.Element(u"iri")

            project = etree.SubElement(root, u"project", {u"abstract":u"Annotations",u"title":u"Annotations", u"user":u"IRI Web", u"id":unicode(uuid.uuid4())})

            medias = etree.SubElement(root, u"medias")

            media = etree.SubElement(medias, u"media", {u"pict":u"", u"src":unicode(options.content), u"video":unicode(options.video), u"id":unicode(options.content_id), u"extra":u""})

            annotations = etree.SubElement(root, u"annotations")

            content = etree.SubElement(annotations, u"content", {u"id":unicode(options.content_id)})

            ensemble_parent = content

            content_id = options.content_id

        if ensemble_parent is None:

            file_type = None

            for node in root:

                if node.tag == "project":

                    file_type = "ldt"

                    break

                elif node.tag == "head":

                    file_type = "iri"

                    break

            if file_type == "ldt":

                media_nodes = root.xpath("//media")

                if len(media_nodes) > 0:

                    media = media_nodes[0]

                annotations_node = root.find(u"annotations")

                if annotations_node is None:

                    annotations_node = etree.SubElement(root, u"annotations")

                content_node = annotations_node.find(u"content")

                if content_node is None:

                    content_node = etree.SubElement(annotations_node,u"content", id=media.get(u"id"))

                ensemble_parent = content_node

                content_id = content_node.get(u"id")

                display_nodes = root.xpath("//displays/display/content[@id='%s']" % content_id)

                if len(display_nodes) == 0:

                    get_logger().info("No display node found. Will not update display")

                    display_content_node = None

                else: