from Application.Config import Config
from Application.Layer import Layer
from Application.VideoReader import VideoReader
from datetime import datetime
import imageio
import imutils
import numpy as np
import cv2
import pickle
import time 


class Exporter:
    fps = 30

    def __init__(self, config):
        self.footagePath = config["inputPath"]
        self.outputPath = config["outputPath"]
        self.resizeWidth = config["resizeWidth"]
        self.config = config
        print("Exporter initiated")

    def export(self, layers, contours, masks, raw=True, overlayed=True):
        if raw:
            self.exportRawData(layers, contours, masks)
        if overlayed:
            self.exportOverlayed(layers)
        else:
            self.exportLayers(layers)

    def exportLayers(self, layers):
        # TODO: fix videoreader instanciation
        listOfFrames = self.makeListOfFrames(layers)
        videoReader = VideoReader(self.config, listOfFrames)
        videoReader.fillBuffer()
        maxLength = self.getMaxLengthOfLayers(layers)
        underlay = cv2.VideoCapture(self.footagePath).read()[1]
        underlay = cv2.cvtColor(underlay, cv2.COLOR_BGR2RGB)
        exportFrame = 0

        self.fps = videoReader.getFPS()
        writer = imageio.get_writer(self.outputPath, fps=self.fps)

        start = time.time()
        for i, layer in enumerate(layers):
            print(
                f"\r {i}/{len(layers)} {round(i/len(layers)*100,2)}% {round((time.time() - start), 2)}s", end='\r')
            if len(layer.bounds[0]) == 0:
                continue
            videoReader = VideoReader(self.config)
            listOfFrames = self.makeListOfFrames([layer])
            videoReader.fillBuffer(listOfFrames)
            while not videoReader.videoEnded():
                frameCount, frame = videoReader.pop()
                frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
                frame2 = np.copy(underlay)
                for (x, y, w, h) in layer.bounds[frameCount - layer.startFrame]:
                    if x is None:
                        continue
                    factor = videoReader.w / self.resizeWidth
                    x, y, w, h = (int(x * factor), int(y * factor),
                                  int(w * factor), int(h * factor))

                    frame2[y:y+h, x:x+w] = np.copy(frame[y:y+h, x:x+w])

                    timestr = datetime.fromtimestamp(
                        int(frameCount/self.fps) + videoReader.getStartTime())
                    cv2.putText(frame2, str(i) + "  " + f"{timestr.hour}:{timestr.minute}:{timestr.second}", (int(
                        x+w/2), int(y+h/2)), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 255), 2)
                #cv2.putText(frame2, str(layer.stats["avg"]) + "  " + str(layer.stats["var"]) + "  " + str(layer.stats["dev"]), (int(500), int(500)), cv2.FONT_HERSHEY_SIMPLEX, 1,(255,0,255), 2)
                writer.append_data(frame2)
            videoReader.vc.release()
            videoReader.thread.join()
        videoReader.vc.release()
        videoReader.thread.join()
        writer.close()

    def exportOverlayed(self, layers):

        listOfFrames = self.makeListOfFrames(layers)
        videoReader = VideoReader(self.config, listOfFrames)
        videoReader.fillBuffer()
        maxLength = self.getMaxLengthOfLayers(layers)
        underlay = cv2.VideoCapture(self.footagePath).read()[1]
        underlay = cv2.cvtColor(underlay, cv2.COLOR_BGR2RGB)
        #underlay = np.zeros(shape=[videoReader.h, videoReader.w, 3], dtype=np.uint8)
        frames = []
        for i in range(maxLength):
            frames.append(np.copy(underlay))
        exportFrame = 0

        while not videoReader.videoEnded():
            frameCount, frame = videoReader.pop()
            if frameCount % (60*self.fps) == 0:
                print("Minutes processed: ", frameCount/(60*self.fps), end="\r")
            if frame is None:
                print("ContourExtractor: frame was None")
                continue

            frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
            for layer in layers:
                if layer.startFrame <= frameCount and layer.startFrame + len(layer.bounds) > frameCount:
                    for i in range(0, len(layer.bounds[frameCount - layer.startFrame])):
                        try:
                            underlay1 = underlay
                            (x, y, w,
                            h) = layer.bounds[frameCount - layer.startFrame][i]
                            mask = layer.masks[frameCount - layer.startFrame][i]
                            if x is None:
                                break
                            factor = videoReader.w / self.resizeWidth
                            x, y, w, h = (int(x * factor), int(y * factor),
                                        int(w * factor), int(h * factor))

                            mask = imutils.resize(mask, width=w, height=h+1)
                            mask = np.resize(mask, (h, w))
                            mask = cv2.erode(mask, None, iterations=10)
                            mask *= 255
                            frame2 = frames[frameCount - layer.startFrame]
                            xx = np.copy(cv2.bitwise_and(
                                frame2[y:y+h, x:x+w], frame2[y:y+h, x:x+w], mask=cv2.bitwise_not(mask)))
                            frame2[y:y+h, x:x+w] = cv2.addWeighted(xx, 1, np.copy(
                                cv2.bitwise_and(frame[y:y+h, x:x+w], frame[y:y+h, x:x+w], mask=mask)), 1, 0)
                            frames[frameCount - layer.startFrame] = np.copy(frame2)
                            #cv2.imshow("changes x", frame2)
                            #cv2.waitKey(10) & 0XFF
                            time = datetime.fromtimestamp(
                                int(frameCount/self.fps) + videoReader.getStartTime())
                            cv2.putText(frames[frameCount - layer.startFrame], f"{time.hour}:{time.minute}:{time.second}", (int(
                                x+w/2), int(y+h/2)), cv2.FONT_HERSHEY_SIMPLEX, 1, (255, 255, 255), 2)
                        except:
                            continue
        videoReader.thread.join()
        videoReader.vc.release()

        self.fps = videoReader.getFPS()
        fps = self.fps
        writer = imageio.get_writer(self.outputPath, fps=fps)
        for frame in frames:
            writer.append_data(frame)

        writer.close()

    def exportRawData(self, layers, contours, masks):
        with open(self.config["importPath"], "wb+") as file:
            pickle.dump((layers, contours, masks), file)

    def getMaxLengthOfLayers(self, layers):
        maxLength = 0
        for layer in layers:
            if layer.getLength() > maxLength:
                maxLength = layer.getLength()
        return maxLength

    def makeListOfFrames(self, layers):
        '''Returns set of all Frames which are relavant to the Layers'''
        frameNumbers = set()
        for layer in layers:
            frameNumbers.update(
                list(range(layer.startFrame, layer.startFrame + len(layer))))

        return sorted(list(frameNumbers))