import json
import random
from copy import deepcopy
from itertools import chain

import fpdf
import pytest
from funcy import juxt, merge, rpartial

from image_prediction.formatter.formatters.enum import EnumFormatter
from image_prediction.image_extractor.extractor import ImageMetadataPair
from image_prediction.info import Info
from test.conftest import get_base_position_metadata, add_image, random_single_color_image_from_metadata


def test_image_stitcher(partial_image_metadata_pairs):
    pass


@pytest.mark.parametrize("width", [160])
@pytest.mark.parametrize("height", [90])
@pytest.mark.parametrize("page_width", [int(160 * 1.1)])
@pytest.mark.parametrize("page_height", [int(90 * 1.1)])
def test_partial_image_metadata_pairs(patches_metadata, page_width, page_height):

    pdf = fpdf.FPDF(unit="pt", format=(page_width, page_height))

    for patch in patches_metadata:
        image = random_single_color_image_from_metadata(patch)
        add_image(pdf, ImageMetadataPair(image, patch))

    pdf.output("/tmp/bla.pdf")


def split_box(box, max_step=3):
    def split_recursively(box, step):
        def split_horizontal():
            return split(Info.WIDTH, Info.X1, Info.X2)

        def split_vertical():
            return split(Info.HEIGHT, Info.Y1, Info.Y2)

        def split(dim, coord1, coord2):

            if box[dim] >= 10:
                split_len = random.randint(5, box[dim] - 5)
                split_point = box[coord1] + split_len

                box_left, box_right = juxt(deepcopy, deepcopy)(box)

                box_left[dim] = split_len
                box_right[dim] = box[dim] - split_len

                box_left[coord2] = split_point
                box_right[coord1] = split_point

                return box_left, box_right
            else:
                return [box]

        if step < max_step:
            new_boxes = random.choice([split_horizontal, split_vertical])()

            return chain.from_iterable(map(rpartial(split_recursively, step + 1), new_boxes))
        else:
            return [box]

    return split_recursively(box, 0)


@pytest.fixture()
def patches_metadata(width, height, page_width, page_height):
    box = get_base_position_metadata(width, height, page_width, page_height)
    box = merge(box, {Info.X1: 0, Info.Y1: 0, Info.X2: width, Info.Y2: height})
    boxes = split_box(box)
    return boxes