from Application.Layer import Layer
from Application.Config import Config
from Application.VideoReader import VideoReader
from Application.Exporter import Exporter
from multiprocessing.pool import ThreadPool
import cv2
import numpy as np

class LayerFactory:
    def __init__(self, config, data=None):
        self.data = {}
        self.layers = []
        self.tolerance = config["tolerance"]
        self.ttolerance = config["ttolerance"]
        self.minLayerLength = config["minLayerLength"]
        self.maxLayerLength = config["maxLayerLength"]
        self.resizeWidth = config["resizeWidth"]
        self.footagePath = config["inputPath"]
        self.config = config
        print("LayerFactory constructed")
        self.data = data
        if data is not None:
            self.extractLayers(data)

    def extractLayers(self, data = None):
        '''Bundle given contours together into Layer Objects'''
        if self.data is None:
            if data is None or len(data) == 0 :
                print("LayerFactory data was none")
                return None
            else:
                self.data = data

        frameNumber = min(data)
        contours = data[frameNumber]
        for contour in contours:
            self.layers.append(Layer(frameNumber, contour, self.config))
  
        self.oldLayerIDs = []
        
        with ThreadPool(16) as pool:
            for frameNumber in sorted(data.keys()):
                contours = data[frameNumber]
                if frameNumber%5000 == 0:
                    print(f"{int(round(frameNumber/max(data.keys()), 2)*100)}% done with Layer extraction")

                tmp = [[frameNumber, contour] for contour in contours]
                pool.map(self.getLayers, tmp)
                #for x in tmp:
                    #self.getLayers(x)

        return self.layers

    def getLayers(self, data):
        frameNumber = data[0]
        bounds = data[1]
        (x,y,w,h) = bounds
        tol = self.tolerance
        foundLayer = 0

        for i in range(0, len(self.layers)):
            if i in self.oldLayerIDs:
                continue
            if frameNumber - self.layers[i].lastFrame > self.ttolerance:
                self.oldLayerIDs.append(i)
                continue

            for bounds in self.layers[i].bounds[-1]:
                if bounds is None or foundLayer >= self.config["LayersPerContour"]:
                    break
                (x2,y2,w2,h2) = bounds
                if self.contoursOverlay((x-tol,y+h+tol), (x+w+tol,y-tol), (x2,y2+h2), (x2+w2,y2)):
                    self.layers[i].add(frameNumber, (x,y,w,h))
                    foundLayer += 1
                    #break

        if foundLayer == 0:
            self.layers.append(Layer(frameNumber, (x,y,w,h), self.config))

    def contoursOverlay(self, l1, r1, l2, r2): 
        # If one rectangle is on left side of other 
        if(l1[0] >= r2[0] or l2[0] >= r1[0]): 
            return False
        # If one rectangle is above other 
        if(l1[1] <= r2[1] or l2[1] <= r1[1]): 
            return False
        return True