import os
import sys

g_pp = None
def program_path() -> str:
    global g_pp

    if g_pp == None:
        g_pp = os.path.abspath(os.path.split(sys.argv[0])[0])
    
    return g_pp

def exists(vault: str, path: str) -> bool:
    fp = os.path.join(program_path(), vault, path)
    return os.path.exists(fp)

def fd_open(vault: str, path: str) -> object:
    fp = os.path.join(program_path(), vault, path)
    return open(fp, 'r')

def fd_write(vault: str, path: str) -> object:
    fp = os.path.join(program_path(), vault, path)
    os.makedirs(os.path.join(program_path(), vault), exist_ok=True)
    return open(fp, 'w')

g_data = {}

class ModInfo(object):
    def __init__(self: object, modname: str):
        self.name = modname
        self.modinfo = None

class ModInfoDir(ModInfo):
    def __init__(self: object, modname: str):
        super().__init__(modname)

    def path(self: object, path: str) -> str:
        return os.path.join(self.name, path)

    def exists(self: object, path: str) -> object:
        return exists('data', self.path(path))

    def fd_open(self: object, path: str) -> object:
        return fd_open('data', self.path(path))

    def has_modinfo(self: object) -> bool:
        return exists('data', self.path('modinfo.json'))

    def read_modinfo(self: object) -> None:
        inffile = self.fd_open('data', self.path('modinfo.json'))
        self.modinfo = json.load(inffile)


def load_mods() -> None:
    global g_data
    g_data = {}

    full_modlist = {}
    for mod in os.listdir(os.path.join(program_path(), 'data')):
        mn, me = os.path.splitext(mod)
        if not mn in full_modlist:
            full_modlist[mn] = {}
        if me.lower() == 'zip':
            # handle zip mods here somehow
            # full_modlist[mn][me] = mod
            pass
        elif me == '' or os.path.isdir(os.path.join(program_path(), 'data', mn)):
            moddata = ModInfoDir()
            if moddata.has_modinfo():
                full_modlist[mn][me] = moddata

    modlist = {}
    for mn in full_modlist.keys():
        if '' in full_modlist[mn]:
            modlist[mn] = full_modlist[mn]['']