#!/usr/bin/env python3
# -*-coding:UTF-8 -*

import os
import sys

from datetime import datetime
from io import BytesIO
from PIL import Image
from PIL import ImageDraw

from pymisp import MISPObject

sys.path.append(os.environ['AIL_BIN'])
##################################
# Import Project packages
##################################
from lib.objects.abstract_daterange_object import AbstractDaterangeObject, AbstractDaterangeObjects
from lib.ConfigLoader import ConfigLoader
from packages import Date
# from lib import Language
# from lib.data_retention_engine import update_obj_date, get_obj_date_first

from flask import url_for

config_loader = ConfigLoader()
r_cache = config_loader.get_redis_conn("Redis_Cache")
r_object = config_loader.get_db_conn("Kvrocks_Objects")
baseurl = config_loader.get_config_str("Notifications", "ail_domain")
IMAGE_FOLDER = config_loader.get_files_directory('images')
config_loader = None

# SET x1,y1:x2,y2:x3,y3:x4,y4:extracted_text

class Ocr(AbstractDaterangeObject):
    """
    AIL Message Object. (strings)
    """

    def __init__(self, id):
        super(Ocr, self).__init__('ocr', id)

    def exists(self):
        return r_object.exists(f'ocr:{self.id}')

    def get_content(self, r_type='str'):
        """
        Returns content
        """
        global_id = self.get_global_id()
        content = r_cache.get(f'content:{global_id}')
        if not content:
            dict_content = {}
            for extracted in r_object.smembers(f'ocr:{self.id}'):
                extracted = extracted.split(':', 4)
                x, y = extracted[0].split(',', 1)
                # get text line, y +- 20
                rounded_y = round(int(y) / 20) * 20
                if rounded_y not in dict_content:
                    dict_content[rounded_y] = []
                dict_content[rounded_y].append((int(x), int(y), extracted[-1]))

            content = ''
            new_line = True
            l_key = sorted(dict_content.keys())
            for key in l_key:
                dict_content[key] = sorted(dict_content[key], key=lambda c: c[0])
                for text in dict_content[key]:
                    if new_line:
                        content = f'{content}{text[2]}'
                        new_line = False
                    else:
                        content = f'{content}      {text[2]}'
                content = f'{content}\n'
                new_line = True

            # Set Cache
            if content:
                global_id = self.get_global_id()
                r_cache.set(f'content:{global_id}', content)
                r_cache.expire(f'content:{global_id}', 300)

        if r_type == 'str':
            return content
        elif r_type == 'bytes':
            if content:
                return content.encode()

    def get_date(self): # TODO
        return Date.get_today_date_str()

    def get_source(self): # TODO
        """
        Returns source/feeder name
        """
        return 'ocr'
        # l_source = self.id.split('/')[:-2]
        # return os.path.join(*l_source)

    def get_basename(self):  # TODO
        return 'ocr'

    def get_language(self):
        languages = self.get_languages()
        if languages:
            return languages.pop()
        else:
            return None

    def get_link(self, flask_context=False):
        if flask_context:
            url = url_for('correlation.show_correlation', type=self.type, id=self.id)
        else:
            url = f'{baseurl}/correlation/show?type={self.type}&id={self.id}'
        return url

    def get_svg_icon(self):
        return {'style': 'fas', 'icon': '\uf065', 'color': 'yellow', 'radius': 5}

    def get_image_path(self):
        rel_path = os.path.join(self.id[0:2], self.id[2:4], self.id[4:6], self.id[6:8], self.id[8:10], self.id[10:12], self.id[12:])
        filename = os.path.join(IMAGE_FOLDER, rel_path)
        return os.path.realpath(filename)

    def get_misp_object(self):  # TODO
        obj = MISPObject('instant-message', standalone=True)
        obj_date = self.get_date()
        if obj_date:
            obj.first_seen = obj_date
        else:
            self.logger.warning(
                f'Export error, None seen {self.type}:{self.subtype}:{self.id}, first={obj_date}')

        # obj_attrs = [obj.add_attribute('first-seen', value=obj_date),
        #              obj.add_attribute('raw-data', value=self.id, data=self.get_raw_content()),
        #              obj.add_attribute('sensor', value=get_ail_uuid())]
        obj_attrs = []
        for obj_attr in obj_attrs:
            for tag in self.get_tags():
                obj_attr.add_tag(tag)
        return obj

    # options: set of optional meta fields
    def get_meta(self, options=None, translation_target=''):
        """
        :type options: set
        """
        if options is None:
            options = set()
        meta = self._get_meta(options=options)
        meta['tags'] = self.get_tags()
        meta['content'] = self.get_content()

        # optional meta fields
        if 'investigations' in options:
            meta['investigations'] = self.get_investigations()
        if 'link' in options:
            meta['link'] = self.get_link(flask_context=True)
        if 'icon' in options:
            meta['svg_icon'] = self.get_svg_icon()
        if 'img' in options:
            meta['img'] = self.draw_bounding_boxs()
        if 'map' in options:
            meta['map'] = self.get_img_map_coords()
        if 'language' in options:
            meta['language'] = self.get_language()
        if 'translation' in options and translation_target:
            if meta.get('language'):
                source = meta['language']
            else:
                source = None
            meta['translation'] = self.translate(content=meta.get('content'), source=source, target=translation_target)
            if 'language' in options:
                meta['language'] = self.get_language()
        return meta

    def get_objs_container(self):
        objs_containers = set()
        # chat
        objs_containers.add(self.get_first_correlation('chat'))
        subchannel = self.get_first_correlation('chat-subchannel')
        if subchannel:
            objs_containers.add(subchannel)
        thread = self.get_first_correlation('chat-thread')
        if thread:
            objs_containers.add(thread)
        return objs_containers

    def create_coord_str(self, bbox):
        c1, c2, c3, c4 = bbox
        x1, y1 = c1
        x2, y2 = c2
        x3, y3 = c3
        x4, y4 = c4
        return f'{int(x1)},{int(y1)}:{int(x2)},{int(y2)}:{int(x3)},{int(y3)}:{int(x4)},{int(y4)}'

    def _unpack_coord(self, coord):
        return coord.split(',', 1)

    def get_coords(self):
        coords = []
        for extracted in r_object.smembers(f'ocr:{self.id}'):
            coord = []
            bbox = extracted.split(':', 4)[:-1]
            for c in bbox:
                x, y = self._unpack_coord(c)
                coord.append((int(x), int(y)))
            coords.append(coord)
        return coords

    def get_img_map_coords(self):
        coords = []
        for extracted in r_object.smembers(f'ocr:{self.id}'):
            extract = extracted.split(':', 4)
            x1, y1 = self._unpack_coord(extract[0])
            x2, y2 = self._unpack_coord(extract[1])
            x3, y3 = self._unpack_coord(extract[2])
            x4, y4 = self._unpack_coord(extract[3])
            coords.append((f'{x1},{y1},{x2},{y2},{x3},{y3},{x4},{y4}', extract[4]))
        return coords

    def edit_text(self, coordinates, text, new_text, new_coordinates=None):
        pass

    def add_text(self, coordinates, text):
        val = f'{coordinates}:{text}'
        return r_object.sadd(f'ocr:{self.id}', val)

    def remove_text(self, val):
        return r_object.srem(f'ocr:{self.id}', val)

    def update_correlation(self, date=None):
        if date:
            self.add(date, None)
        image_correl = self.get_obj_correlations('image', '', self.id)
        for obj_type in image_correl:
            if obj_type != 'ocr':
                for obj_raw in image_correl[obj_type]:
                    obj_subtype, obj_id = obj_raw.split(':', 1)
                    self.add_correlation(obj_type, obj_subtype, obj_id)

    def create(self, extracted_texts, tags=[]):
        # r_object.sadd(f'{self.type}:all', self.id)
        created = False
        for extracted in extracted_texts:
            bbox, text = extracted
            if len(text) > 1:
                str_coords = self.create_coord_str(bbox)
                self.add_text(str_coords, text)
                created = True

        if created:
            # Correlations
            self._copy_from('image', self.id)
            self.update_correlation()
            self.add_correlation('image', '', self.id)

            for tag in tags:
                self.add_tag(tag)
            return self.id

    # # WARNING: UNCLEAN DELETE /!\ TEST ONLY /!\
    def delete(self):
        r_object.delete(f'ocr:{self.id}')

    def draw_bounding_boxs(self):
        img = Image.open(self.get_image_path()).convert("RGBA")
        draw = ImageDraw.Draw(img)
        for bbox in self.get_coords():
            c1, c2, c3, c4 = bbox
            draw.line((tuple(c1), tuple(c2)), fill="yellow", width=2)
            draw.line((tuple(c2), tuple(c3)), fill="yellow", width=2)
            draw.line((tuple(c3), tuple(c4)), fill="yellow", width=2)
            draw.line((tuple(c4), tuple(c1)), fill="yellow", width=2)
        # img.show()
        buff = BytesIO()
        img.save(buff, "PNG")
        return buff.getvalue()


def create(obj_id, detections, tags=[]):
    obj = Ocr(obj_id)
    if not obj.exists():
        obj_id = obj.create(detections, tags=tags)
        if obj_id:
            return obj

# TODO preload languages
def extract_text(image_path, languages, threshold=0.2):
    import easyocr
    reader = easyocr.Reader(languages, verbose=False)
    texts = reader.readtext(image_path)
    # print(texts)
    extracted = []
    for bbox, text, score in texts:
        if score > threshold:
            extracted.append((bbox, text))
    return extracted


def get_ocr_languages():
    return {'af', 'ar', 'as', 'az', 'be', 'bg', 'bh', 'bs', 'cs', 'cy', 'da', 'de', 'en', 'es', 'et', 'fa', 'fr', 'ga', 'hi', 'hr', 'hu', 'id', 'is', 'it', 'ja', 'kn', 'ko', 'ku', 'la', 'lt', 'lv', 'mi', 'mn', 'mr', 'ms', 'mt', 'ne', 'nl', 'no', 'oc', 'pi', 'pl', 'pt', 'ro', 'ru', 'sk', 'sl', 'sq', 'sr', 'sv', 'sw', 'ta', 'te', 'th', 'tl', 'tr', 'ug', 'uk', 'ur', 'uz', 'vi', 'zh'}


def sanityze_ocr_languages(languages, ocr_languages=None):
    langs = set()
    if not ocr_languages:
        ocr_languages = get_ocr_languages()
    for lang in languages:
        if lang in ocr_languages:
            if lang == 'zh':
                langs.add('ch_sim')
            elif lang == 'sr':
                langs.add('rs_latin')
            else:
                langs.add(lang)
    return langs

class Ocrs(AbstractDaterangeObjects):
    """
        OCR Objects
    """
    def __init__(self):
        super().__init__('ocr', Ocr)

    def get_name(self):
        return 'Ocrs'

    def get_icon(self):
        return {'fas': 'far', 'icon': 'expand'}

    def get_link(self, flask_context=False):
        if flask_context:
            url = url_for('objects_ocr.objects_ocrs')
        else:
            url = f'{baseurl}/objects/ocrs'
        return url

    def sanitize_id_to_search(self, name_to_search):
        return name_to_search  # TODO


#### API ####
def api_get_ocr(obj_id, translation_target=None):
    ocr = Ocr(obj_id)
    if not ocr.exists():
        return {"status": "error", "reason": "Unknown ocr"}, 404
    meta = ocr.get_meta({'content', 'icon', 'img', 'language', 'link', 'map', 'translation'}, translation_target=translation_target)
    return meta, 200