from __future__ import (
    division, absolute_import, print_function, unicode_literals
)

import threading
import io
import base64
import re
from random import shuffle

import xbmcvfs
import xbmc
import xbmcaddon
import requests
from six.moves.BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
from six.moves.urllib.parse import urlparse
from six import ensure_text

from .jellyfin import api
from .lazylogger import LazyLogger
from .item_functions import get_art
from .utils import translate_path

pil_loaded = False
try:
    from PIL import Image, ImageOps
    pil_loaded = True
except ImportError:
    pil_loaded = False

PORT_NUMBER = 24276
log = LazyLogger(__name__)


def get_image_links(url):

    settings = xbmcaddon.Addon()
    server = settings.getSetting('server_address')
    if server is None:
        return []

    url = re.sub("(?i)EnableUserData=[a-z]+", "EnableUserData=False", url)
    url = re.sub("(?i)EnableImageTypes=[,a-z]+", "EnableImageTypes=Primary", url)
    url = url.replace("{field_filters}", "BasicSyncInfo")
    url = re.sub("(?i)Fields=[,a-z]+", "Fields=BasicSyncInfo", url)

    if not re.search('enableimagetypes=', url, re.IGNORECASE):
        url += "&EnableImageTypes=Primary"

    if not re.search('fields=', url, re.IGNORECASE):
        url += "&Fields=BasicSyncInfo"

    if not re.search('EnableUserData=', url, re.IGNORECASE):
        url += "&EnableUserData=False"

    result = api.get(url)

    items = result.get("Items")
    if not items:
        return []

    art_urls = []
    for iteem in items:
        art = get_art(item=iteem, server=server)
        art_urls.append(art)

    shuffle(art_urls)

    return art_urls


def build_image(path):
    log.debug("build_image()")

    log.debug("Request Path : {0}".format(path))

    request_path = path[1:]

    if request_path == "favicon.ico":
        return []

    decoded_url = ensure_text(base64.b64decode(request_path))
    log.debug("decoded_url : {0}".format(decoded_url))

    image_urls = get_image_links(decoded_url)

    width, height = 500, 750
    collage = Image.new('RGB', (width, height), (5, 5, 5))

    cols = 2
    rows = 2
    thumbnail_width = int(width / cols)
    thumbnail_height = int(height / rows)
    size = (thumbnail_width, thumbnail_height)
    image_count = 0

    for art in image_urls:

        thumb_url = art.get("thumb")
        if thumb_url:
            url_bits = urlparse(thumb_url.strip())

            host_name = url_bits.hostname
            port = url_bits.port
            url_path = url_bits.path
            url_query = url_bits.query

            server = "%s:%s" % (host_name, port)
            url_full_path = url_path + "?" + url_query

            log.debug("Loading image from : {0} {1} {2}".format(image_count, server, url_full_path))

            try:
                image_response = requests.get(thumb_url)
                image_data = image_response.content

                loaded_image = Image.open(io.BytesIO(image_data))
                image = ImageOps.fit(loaded_image, size, method=Image.ANTIALIAS, bleed=0.0, centering=(0.5, 0.5))

                x = int(image_count % cols) * thumbnail_width
                y = int(image_count/cols) * thumbnail_height
                collage.paste(image, (x, y))

                del loaded_image
                del image
                del image_data

            except Exception as con_err:
                log.debug("Error loading image : {0}".format(con_err))

            image_count += 1

        if image_count == cols * rows:
            break

    del image_urls

    img_byte_arr = io.BytesIO()
    collage.save(img_byte_arr, format='JPEG')
    image_bytes = img_byte_arr.getvalue()

    return image_bytes


class HttpImageHandler(BaseHTTPRequestHandler):

    def log_message(self, format, *args):
        log_line = format % args
        log.debug(log_line)
        return

    def do_GET(self):
        log.debug("HttpImageHandler:do_GET()")
        self.serve_image()
        return

    def do_HEAD(self):
        log.debug("HttpImageHandler:do_HEAD()")
        self.send_response(200)
        self.end_headers()
        return

    def serve_image(self):

        if pil_loaded:

            image_bytes = build_image(self.path)
            self.send_response(200)
            self.send_header('Content-type', 'image/jpeg')
            self.send_header('Content-Length', str(len(image_bytes)))
            self.end_headers()
            self.wfile.write(image_bytes)

        else:

            image_path = translate_path("special://home/addons/plugin.video.jellycon/icon.png").decode('utf-8')
            self.send_response(200)
            self.send_header('Content-type', 'image/png')
            modified = xbmcvfs.Stat(image_path).st_mtime()
            self.send_header('Last-Modified', "%s" % modified)
            image = xbmcvfs.File(image_path)
            size = image.size()
            self.send_header('Content-Length', str(size))
            self.end_headers()
            self.wfile.write(image.readBytes())
            image.close()
            del image


class HttpImageServerThread(threading.Thread):

    def __init__(self):
        threading.Thread.__init__(self)
        self.keep_running = True

    def stop(self):
        log.debug("HttpImageServerThread:stop called")
        self.keep_running = False
        self.server.shutdown()

    def run(self):
        log.debug("HttpImageServerThread:started")
        self.server = HTTPServer(('', PORT_NUMBER), HttpImageHandler)

        while self.keep_running:
            self.server.serve_forever()
            xbmc.sleep(1000)

        log.debug("HttpImageServerThread:exiting")