import os, sys, datetime
import cv2 as cv
import argparse
import youtube_dl

from lib.data import video


# ------------------------------------parameters------------------------------#
parser = argparse.ArgumentParser(description='Process parameters.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('--start_id', default=2000, type=int, help='starting scene index')
parser.add_argument('--duration', default=120, type=int, help='scene duration')
parser.add_argument('--disk_path', default="/mnt/netdisk/data/video/", help='the path to save the dataset')
parser.add_argument('--summary_dir', default="", help='the path to save the log')
parser.add_argument('--REMOVE', action='store_true', help='whether to remove the original video file after data preparation')
parser.add_argument('--TEST', action='store_true', help='verify video links, save information in log, no real video downloading!')

Flags = parser.parse_args()

if Flags.summary_dir == "":
    Flags.summary_dir = os.path.join(Flags.disk_path, "log/")
os.path.isdir(Flags.disk_path) or os.makedirs(Flags.disk_path)
os.path.isdir(Flags.summary_dir) or os.makedirs(Flags.summary_dir)

link_path = "https://vimeo.com/"
video_data_dict = { 
# Videos and frames are hard-coded. 
# We select frames to make sure that there is no scene switching in the data
# We assume that the Flags.duration is 120
    "121649159" : [0, 310,460,720,860], #1
    "40439273"  : [90,520,700,1760,2920,3120,3450,4750,4950,5220,6500,6900,9420,9750], #2
    "87389090"  : [100,300,500,800,1000,1200,1500,1900,2050,2450,2900], #3
    "335874600" : [287, 308, 621, 1308, 1538, 1768, 2036, 2181, 2544, 2749, 2867, 3404, 3543, 3842, 4318, 4439,
                    4711, 4900, 7784, 8811, 9450],  # new, old #[4,6,13,14,19] 404
    "114053015" : [30,1150,2160,2340,3190,3555], #5 
    "160578133" : [550,940,1229,1460,2220,2900, 3180, 4080, 4340, 4612, 4935, 
                    5142, 5350, 5533, 7068], # new, old #[20,21,27,29,30,35] 404
    "148058982" : [80,730,970,1230,1470,1740], #7
    "150225201" : [0,560,1220,1590,1780], #8
    "145096806" : [0,300,550,800,980,1500], #9
    "125621327" : [240,900,1040,1300,1970,2130,2530,3020,3300,3620,3830,4300,4700,4960], #10
    "162166758" : [120,350,540,750,950,1130,1320,1530,1730,1930], #11
    "115829238" : [140,450,670,910,1100,1380,1520,1720], #12
    "159455925" : [40,340,490,650,850,1180,1500,1800,2000,2300,2500,2800,3200], #15
    "193873193" : [0,280,1720], #16
    "133842385" : [300,430,970,1470,1740,2110,2240,2760,3080,3210,3400,3600], #17
    "97692560"  : [0,210,620,930,1100,1460,1710,2400,2690,3200,3400,3560,3780], #18
    "142480565" : [835,1380,1520,1700,2370,4880], #22
    "174952003" : [480,680,925,1050,1200,1380,1600,1800,2100,2350,2480,2680,3000,3200,3460,4500,4780,
                    5040,5630,5830,6400,6680,7300,7500,7800], #23
    "165643973" : [300,600,1000,1500,1700,1900,2280,2600,2950,3200,3500,3900,4300,4500], #24
    "163736142" : [120,400,700,1000,1300,1500,1750,2150,2390,2550,3100,3400,3800,4100,4400,4800,5100,5500,5800,6300], #25
    "189872577" : [0,170,340,4380,4640,5140,7300,7470,7620,7860,9190,9370], #26
    "181180995" : [30,160,400,660,990,2560,2780,3320,3610,5860,6450,7260,7440,8830,9020,9220,9390,], #28
    "167892347" : [220,1540,2120,2430,5570,6380,6740],  #31
    "146484162" : [1770,2240,3000,4800,4980,5420,6800],  #32
    "204313990" : [110],   #33
    "169958461" : [140,700,1000,1430,1630,1900,2400,2600,2800,3000,3200,3600,3900,4200,4600,5000,5700,
                    6000,6400,6800,7100,7600,7900,8200],   #34
    "198634890" : [200,320,440,1200,1320,1560,1680,1800,1920,3445],   #36
    "89936769"  : [1260,1380,1880], #37
}


# ------------------------------------log------------------------------#
def print_configuration_op(FLAGS):
    print('[Configurations]:')
    for name, value in FLAGS.__dict__.items():
        print('\t%s: %s'%(name, str(value)))
    print('End of configuration')
    
class MyLogger(object):
    def __init__(self):
        self.terminal = sys.stdout
        now_str = datetime.datetime.now().strftime("%m%d%H%M")
        self.log = open(Flags.summary_dir + "logfile_%s.txt"%now_str, "a") 

    def write(self, message):
        self.terminal.write(message)
        self.log.write(message) 

    def flush(self):
        self.log.flush()
        
sys.stdout = MyLogger()
print_configuration_op(Flags)


# ------------------------------------tool------------------------------#
def gen_frames(infile, outdir, width, height, start, duration, savePNG=True):
    print("folder %s: %dx[%d,%d]//2 at frame %d of %s"
        %(outdir, duration, width, height, start,infile,))
    
    if savePNG:
        cam = video.create_capture(infile)
        for i in range(duration):
            colFull = video.getImg(cam, i+start) 
            filename = outdir+'col_high'+("_%04d.png"%(i))
            cv.imwrite( filename, colFull)


# ------------------------------------main------------------------------#
cur_id, valid_video, try_num = Flags.start_id, 0, 0

for keys in video_data_dict:
    try_num += len(video_data_dict[keys])
print("Try loading %dx%d."%(try_num, Flags.duration))
             
ydl = youtube_dl.YoutubeDL( 
    {'format': 'bestvideo/best',
     'outtmpl': os.path.join(Flags.disk_path, '%(id)s.%(ext)s'),})
     
saveframes = not Flags.TEST
for keys in video_data_dict:
    tar_vid_input = link_path + keys
    print(tar_vid_input)
    info_dict = {"width":-1, "height": -1, "ext": "xxx", }
    
    # download video from vimeo
    try:
        info_dict = ydl.extract_info(tar_vid_input, download=saveframes)
        # we only need info_dict["ext"], info_dict["width"], info_dict["height"]
    except KeyboardInterrupt:
        print("KeyboardInterrupt!")
        exit()
    except:
        print("youtube_dl error:" + tar_vid_input)
        pass
    
    # check the downloaded video
    tar_vid_output = os.path.join(Flags.disk_path, keys+'.'+info_dict["ext"])
    if saveframes and (not os.path.exists(tar_vid_output)):
        print("Skipped invalid link or other error:" + tar_vid_input)
        continue
    if info_dict["width"] < 400 or info_dict["height"] < 400:
        print("Skipped videos of small size %dx%d"%(info_dict["width"] , info_dict["height"] ))
        continue
    valid_video = valid_video + 1
    
    # get training frames
    for start_fr in video_data_dict[keys]:
        tar_dir = os.path.join(Flags.disk_path, "scene_%04d/"% cur_id)
        if(saveframes):
            os.path.isdir(tar_dir) or os.makedirs(tar_dir)
        gen_frames(tar_vid_output, tar_dir, info_dict["width"], info_dict["height"], start_fr, Flags.duration, saveframes)
        cur_id = cur_id+1
        
    if saveframes and Flags.REMOVE:
        print("remove ", tar_vid_output)
        os.remove(tar_vid_output)
        
print("Done: get %d valid folders with %d frames from %d videos." % (cur_id - Flags.start_id, Flags.duration, valid_video))