#!/usr/bin/python3
# SPDX-License-Identifier: LicenseRef-EliasSteurerTachiom OR AGPL-3.0-only
from fileinput import filename
from zipfile import ZipFile
import platform
from urllib.request import urlopen
import os
import defines
from shutil import move, rmtree
from util import cd_repo_root_path
from sys import stdout

stdout.reconfigure(encoding='utf-8')

def download(
        download_server_base_url,
        extraction_path,
        name) -> str:

    url = download_server_base_url + name
    print(f"Downloading {name} from: {url}")
    filedata = urlopen(url)
    datatowrite = filedata.read()
    path_and_filename = os.path.join(extraction_path, name)

    print("Save tmp file: ", path_and_filename)
    with open(path_and_filename, 'wb') as f:
        f.write(datatowrite)

    return path_and_filename


def extract_zip(extraction_path, path_and_filename):
    print(f"Extract {path_and_filename} to {extraction_path}")

    with ZipFile(path_and_filename, "r") as zip_ref:
        zip_ref.extractall(extraction_path)

    print(f"Delete tmp file: {path_and_filename}")
    os.remove(path_and_filename)


def extract_zip_executables(extraction_path, path_and_filename):
    files = []
    listOfFileNames = []
    with ZipFile(path_and_filename, 'r') as zipObj:
        # Get a list of all archived file names from the zip
        listOfFileNames = zipObj.namelist()
        # Iterate over the file names
        for fileName in listOfFileNames:
            # Check filename endswith csv
            if fileName.endswith('.exe'):
                # Extract a single file from zip
                zipObj.extract(fileName, extraction_path)
                print(f"Extract {fileName} to {extraction_path}")
                files.append(fileName)

    for file in files:
        abs_file_path = os.path.join(extraction_path, file)
        move(abs_file_path, extraction_path)
        print(f"Move {abs_file_path} to {extraction_path}")

    print(f"Delete tmp zip file: {path_and_filename}")
    os.remove(path_and_filename)
    # We need the first folder name of a file:
    # ffmpeg-5.0.1-essentials_build/bin/ffmpeg.exe 
    empty_ffmpeg_folder = os.path.join(extraction_path,os.path.dirname(os.path.dirname(files[0])))
    ffplay = os.path.join(extraction_path,"ffplay.exe")
    print(f"Delete not needed {ffplay}")
    os.remove(ffplay)
    print(f"Delete empty folder: {empty_ffmpeg_folder}")
    rmtree(empty_ffmpeg_folder)


def download_prebuild_ffmpeg_mac(extraction_path: str):

    print("Setup ffmpeg mac")
    ffmpeg_zip_name = f'ffmpeg-{defines.FFMPEG_VERSION}.zip'
    ffprobe_zip_name = f'ffprobe-{defines.FFMPEG_VERSION}.zip'
    download_server_base_url = 'https://evermeet.cx/ffmpeg/'

    ffmpeg_path_and_filename = download(
        download_server_base_url, extraction_path, ffmpeg_zip_name)
    extract_zip(extraction_path, ffmpeg_path_and_filename)

    ffprobe_path_and_filename = download(
        download_server_base_url, extraction_path, ffprobe_zip_name)
    extract_zip(extraction_path, ffprobe_path_and_filename)


def download_prebuild_ffmpeg_windows(extraction_path: str):

    print("Setup ffmpeg Windows")
    ffmpeg_shared_7zip_name = "ffmpeg-release-essentials.zip"
    download_server_base_url = 'https://www.gyan.dev/ffmpeg/builds/'

    ffmpeg_path_and_filename = download(
        download_server_base_url, extraction_path, ffmpeg_shared_7zip_name)

    extract_zip_executables(extraction_path, ffmpeg_path_and_filename)

def execute():
    # Make sure the script is always started from the same folder
    root_path = cd_repo_root_path()
    extraction_path = os.path.join(root_path, "Common/ffmpeg")

    if os.path.exists(extraction_path):
        rmtree(extraction_path)
        
    os.makedirs(extraction_path)
    
    if platform.system() == "Windows":
        download_prebuild_ffmpeg_windows(extraction_path)
    elif platform.system() == "Darwin":
        download_prebuild_ffmpeg_mac(extraction_path)


if __name__ == "__main__":
    execute()