# -*- coding: utf-8 -*-

from __future__ import absolute_import, print_function, division

import numpy as np

from PIL import Image, ImageDraw, ImageFont
import cv2

from libs.configs import cfgs
from libs.label_name_dict.label_dict import LABEl_NAME_MAP
NOT_DRAW_BOXES = 0
ONLY_DRAW_BOXES = -1
ONLY_DRAW_BOXES_WITH_SCORES = -2

STANDARD_COLORS = [
    'AliceBlue', 'Chartreuse', 'Aqua', 'Aquamarine', 'Azure', 'Beige', 'Bisque',
    'BlanchedAlmond', 'BlueViolet', 'BurlyWood', 'CadetBlue', 'AntiqueWhite',
    'Chocolate', 'Coral', 'CornflowerBlue', 'Cornsilk', 'Crimson', 'Cyan',
    'DarkCyan', 'DarkGoldenRod', 'DarkGrey', 'DarkKhaki', 'DarkOrange',
    'DarkOrchid', 'DarkSalmon', 'DarkSeaGreen', 'DarkTurquoise', 'DarkViolet',
    'DeepPink', 'DeepSkyBlue', 'DodgerBlue', 'FireBrick', 'FloralWhite',
    'ForestGreen', 'Fuchsia', 'Gainsboro', 'GhostWhite', 'Gold', 'GoldenRod',
    'Salmon', 'Tan', 'HoneyDew', 'HotPink', 'IndianRed', 'Ivory', 'Khaki',
    'Lavender', 'LavenderBlush', 'LawnGreen', 'LemonChiffon', 'LightBlue',
    'LightCoral', 'LightCyan', 'LightGoldenRodYellow', 'LightGray', 'LightGrey',
    'LightGreen', 'LightPink', 'LightSalmon', 'LightSeaGreen', 'LightSkyBlue',
    'LightSlateGray', 'LightSlateGrey', 'LightSteelBlue', 'LightYellow', 'Lime',
    'LimeGreen', 'Linen', 'Magenta', 'MediumAquaMarine', 'MediumOrchid',
    'MediumPurple', 'MediumSeaGreen', 'MediumSlateBlue', 'MediumSpringGreen',
    'MediumTurquoise', 'MediumVioletRed', 'MintCream', 'MistyRose', 'Moccasin',
    'NavajoWhite', 'OldLace', 'Olive', 'OliveDrab', 'Orange', 'OrangeRed',
    'Orchid', 'PaleGoldenRod', 'PaleGreen', 'PaleTurquoise', 'PaleVioletRed',
    'PapayaWhip', 'PeachPuff', 'Peru', 'Pink', 'Plum', 'PowderBlue', 'Purple',
    'Red', 'RosyBrown', 'RoyalBlue', 'SaddleBrown', 'Green', 'SandyBrown',
    'SeaGreen', 'SeaShell', 'Sienna', 'Silver', 'SkyBlue', 'SlateBlue',
    'SlateGray', 'SlateGrey', 'Snow', 'SpringGreen', 'SteelBlue', 'GreenYellow',
    'Teal', 'Thistle', 'Tomato', 'Turquoise', 'Violet', 'Wheat', 'White',
    'WhiteSmoke', 'Yellow', 'YellowGreen', 'LightBlue', 'LightGreen'
]
FONT = ImageFont.load_default()


def draw_a_rectangel_in_img(draw_obj, box, color, width):
    '''
    use draw lines to draw rectangle. since the draw_rectangle func can not modify the width of rectangle
    :param draw_obj:
    :param box: [x1, y1, x2, y2]
    :return:
    '''
    x1, y1, x2, y2 = box[0], box[1], box[2], box[3]
    top_left, top_right = (x1, y1), (x2, y1)
    bottom_left, bottom_right = (x1, y2), (x2, y2)

    draw_obj.line(xy=[top_left, top_right],
                  fill=color,
                  width=width)
    draw_obj.line(xy=[top_left, bottom_left],
                  fill=color,
                  width=width)
    draw_obj.line(xy=[bottom_left, bottom_right],
                  fill=color,
                  width=width)
    draw_obj.line(xy=[top_right, bottom_right],
                  fill=color,
                  width=width)


def only_draw_scores(draw_obj, box, score, color):

    x, y = box[0], box[1]
    draw_obj.rectangle(xy=[x, y-10, x+100, y],
                       fill=color)
    draw_obj.text(xy=(x, y-10),
                  text="obj:" +str(round(score, 2)),
                  fill='white',
                  font=FONT)


def draw_label_with_scores(draw_obj, box, label, score, color):
    x, y = box[0], box[1]
    draw_obj.rectangle(xy=[x, y-10, x+100, y],
                       fill=color)

    txt = LABEl_NAME_MAP[label] + ':' + str(round(score, 2))
    draw_obj.text(xy=(x, y-10),
                  text=txt,
                  fill='white',
                  font=FONT)


def draw_boxes_with_label_and_scores(img_array, boxes, labels, scores):

    img_array = img_array + np.array(cfgs.PIXEL_MEAN)
    img_array.astype(np.float32)
    boxes = boxes.astype(np.int64)
    labels = labels.astype(np.int32)
    img_array = np.array(img_array * 255 / np.max(img_array), dtype=np.uint8)

    img_obj = Image.fromarray(img_array)
    raw_img_obj = img_obj.copy()

    draw_obj = ImageDraw.Draw(img_obj)
    num_of_objs = 0
    for box, a_label, a_score in zip(boxes, labels, scores):

        if a_label != NOT_DRAW_BOXES:
            num_of_objs += 1
            #draw_a_rectangel_in_img(draw_obj, box, color=STANDARD_COLORS[a_label], width=3)
            draw_a_rectangel_in_img(draw_obj, box, color='Red', width=3)
            if a_label == ONLY_DRAW_BOXES:  # -1
                continue
            elif a_label == ONLY_DRAW_BOXES_WITH_SCORES:  # -2
                 only_draw_scores(draw_obj, box, a_score, color='Yellow')
                 continue
            else:
                draw_label_with_scores(draw_obj, box, a_label, a_score, color='DeepSkyBlue')

    out_img_obj = Image.blend(raw_img_obj, img_obj, alpha=0.7)

    return np.array(out_img_obj)


if __name__ == '__main__':
    img_array = cv2.imread("/home/yjr/PycharmProjects/FPN_TF/tools/inference_image/2.jpg")
    img_array = np.array(img_array, np.float32) - np.array(cfgs.PIXEL_MEAN)
    boxes = np.array(
        [[200, 200, 500, 500],
         [300, 300, 400, 400],
         [200, 200, 400, 400]]
    )

    # test only draw boxes
    labes = np.ones(shape=[len(boxes), ], dtype=np.float32) * ONLY_DRAW_BOXES
    scores = np.zeros_like(labes)
    imm = draw_boxes_with_label_and_scores(img_array, boxes, labes ,scores)
    # imm = np.array(imm)

    cv2.imshow("te", imm)

    # test only draw scores
    labes = np.ones(shape=[len(boxes), ], dtype=np.float32) * ONLY_DRAW_BOXES_WITH_SCORES
    scores = np.random.rand((len(boxes))) * 10
    imm2 = draw_boxes_with_label_and_scores(img_array, boxes, labes, scores)

    cv2.imshow("te2", imm2)
    # test draw label and scores

    labels = np.arange(1, 4)
    imm3 = draw_boxes_with_label_and_scores(img_array, boxes, labels, scores)
    cv2.imshow("te3", imm3)

    cv2.waitKey(0)