import os
import sys
import subprocess
from PIL import Image
from pdf2image import convert_from_path
from utils import download


def add_path():
    # """
    # 将指定目录添加到 LD_LIBRARY_PATH 环境变量中，并在当前 Python 进程中生效。

    # Parameters:
    # - directory_path (str): 要添加的目录路径。
    # """
    # dir_path = os.path.join(os.getcwd(), 'lib')
    # # 获取当前环境变量的值
    # current_path = os.environ.get("LD_LIBRARY_PATH", "")

    # # 将目录路径添加到 LD_LIBRARY_PATH 中
    # new_path = f"{current_path}:{dir_path}"

    # # 设置 LD_LIBRARY_PATH 环境变量，以便在当前 Python 进程中生效
    # os.environ["LD_LIBRARY_PATH"] = new_path
    os.environ['QT_QPA_PLATFORM'] = 'offscreen'


if sys.platform.startswith('linux'):
    apkname = 'MuseScore.AppImage'
    extra_dir = 'squashfs-root'
    download(
        filename=apkname,
        url='https://cdn.jsdelivr.net/musescore/v4.2.0/MuseScore-4.2.0.233521125-x86_64.AppImage'
    )
    if not os.path.exists(extra_dir):
        subprocess.run(['chmod', '+x', f'./{apkname}'])
        subprocess.run([f'./{apkname}', '--appimage-extract'])

    mscore = f'./{extra_dir}/AppRun'

else:
    mscore = "D:/Program Files/MuseScore 3/bin/MuseScore3.exe"


def midi2wav(mid_file: str):
    wav_file = mid_file.replace('.mid', '.wav')
    command = [mscore, "-o", wav_file, mid_file]
    result = subprocess.run(command)
    print(result)
    return wav_file


def pdf_to_img(pdf_path: str):
    output_path = pdf_path.replace('.pdf', '.jpg')
    images = convert_from_path(pdf_path)
    combined_image = Image.new(
        'RGB', (images[0].width, sum(image.height for image in images))
    )
    y_offset = 0
    for image in images:
        combined_image.paste(image, (0, y_offset))
        y_offset += image.height

    combined_image.save(output_path)
    return output_path


def midi2png(mid_file: str):
    pdf_score = mid_file.replace('.mid', '.pdf')
    command = [mscore, "-o", pdf_score, mid_file]
    result = subprocess.run(command)
    print(result)
    return pdf_to_img(pdf_score)