import subprocess
import os
import shutil
import datetime
import time

import numpy as np
from sortedcontainers import SortedDict
import tqdm

path_to_images = r"..\composite\goes16"
temp_path = r"..\vid"
output_file = r"..\goes16.mp4"
starttime = time.mktime(datetime.datetime(2024, 1, 1).timetuple())
stoptime = time.mktime(datetime.datetime(2099, 1, 1).timetuple())
min_file_size = 200000 # Detect and remove corrupted files by filtering by file size
max_file_size = 500000

os.makedirs(temp_path, exist_ok = True)

files_by_time = SortedDict()
for root, dirs, files in tqdm.tqdm(os.walk(path_to_images), desc="Finding and filtering files."):
    for f in files:
        if f.endswith('.jpg'):
            fpath = os.path.join(root, f)
            fsize = os.path.getsize(fpath)
            ftime = int(f.replace('-', '.').split('.')[-2])
            if (fsize > min_file_size) and (fsize < max_file_size) and (ftime > starttime) and (ftime < stoptime):
                files_by_time[ftime] = fpath

difftimes = np.diff(files_by_time.keys())
unique, counts = np.unique(difftimes, return_counts=True)
interval = unique[0]
assert np.sum((unique % interval) > 0) == 0 # Ensure all our timestamps align perfectly with our interval

prevtime = files_by_time.peekitem(0)[0] - interval
index = 0
newfpath = ""
for t, f in tqdm.tqdm(files_by_time.items(), desc="Copying files to transcode dir", total = len(files_by_time)):
    framejump = (t - prevtime) // interval
    if framejump < 60:
        for i in range(framejump - 1): # Repeat old frame to fill gaps
            shutil.copy(newfpath, f"{os.path.join(temp_path, f"{index+1:06d}.jpg")}")
            index += 1
    else: # Skip past intervals that are too large to fill reasonably
        print(f"Detected a frame gap of: {framejump}!")
    newfpath = f"{os.path.join(temp_path, f"{index+1:06d}.jpg")}"
    shutil.copy(f, newfpath)
    prevtime = t
    index += 1

command_line = f'ffmpeg -framerate 60 -pattern_type sequence -i "{os.path.join(temp_path, r"%06d.jpg")}" -c:v libx264 -crf 18 -preset veryfast {output_file}'
print(command_line)

pipe = subprocess.Popen(command_line, shell=True, stdout=subprocess.PIPE).stdout
output = pipe.read().decode()
pipe.close()

shutil.rmtree(temp_path)