#!/usr/bin/python3 -u

import logging
import pathlib
import subprocess
import sys
import time


win_root = pathlib.Path(r"C:\Users\louis\GitKraken\dottes")
lin_root = pathlib.Path("~/dottes")
file_update_times = {}


def run_continuous():
    logging.info("Run continous")
    
    pwd = pathlib.Path()

    while True:
        for obj_path in pwd.rglob("*"):
            obj_path_str = str(obj_path)
            if not obj_path.is_file():
                continue
            if not obj_path_str.lower().endswith(".abc"):
                continue
            
            if obj_path_str not in file_update_times:
                file_update_times[obj_path_str] = obj_path.lstat().st_mtime
            else:
                if obj_path.lstat().st_mtime > file_update_times[obj_path_str]:
                    file_update_times[obj_path_str] = obj_path.lstat().st_mtime
                    convert_single(lin_path=obj_path_str)



def convert_single(win_path: str = None, lin_path: str = None):
    if win_path:
        input_path = win_path
        win_abc_file_path = pathlib.Path(win_path)
        lin_abc_file_path = lin_root / win_abc_file_path.relative_to(win_root)
    elif lin_path:
        input_path = lin_path
        lin_abc_file_path = pathlib.Path(lin_path)
    else:
        raise Exception("Argument win_path or lin_path must be given")
    
    
    logging.info(f"Converting {input_path}")

    out_file_name = lin_abc_file_path.name.rsplit(".", 1)[0] + ".mid"
    output_path = lin_abc_file_path.parent / out_file_name

    if output_path.exists():
        output_path.unlink()

    r = subprocess.run(
        [
            "abc2midi",
            lin_abc_file_path.as_posix(),
            "-o", output_path.as_posix()
        ]
    )

    if r.returncode != 0:
        logging.error(f"Error whilst convering {lin_abc_file_path}")
    else:
        logging.info(f"Converted {input_path} > {output_path}")


if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO)
    if len(sys.argv) > 1:
        if sys.platform == "win32":
            convert_single(win_path=sys.argv[1])
        elif sys.platform == "linux":
            convert_single(lin_path=sys.argv[1])
        else:
            raise Exception(f"Unknown platform '{sys.platform}', don't know how to interpret path")
    else:
        run_continuous()