#!/usr/bin/env python2

#script to launch Wine with the correct environment

import filecmp
import json
import os
import shutil
import subprocess
import sys
import tarfile

PFX="Proton: "

def log(msg):
    sys.stdout.write(PFX + msg + os.linesep)

def run_wine(args):
    if lfile == None:
        subprocess.call(args, env=env)
    else:
        subprocess.call(args, env=env, stdout=lfile, stderr=subprocess.STDOUT)

def makedirs(path):
    try:
        os.makedirs(path)
    except:
        #already exists
        pass

if not ("STEAM_COMPAT_DATA_PATH" in os.environ):
    log("No compat data path?")
    sys.exit(1)

if "STEAM_COMPAT_CONFIG" in os.environ:
    config = os.environ["STEAM_COMPAT_CONFIG"]

basedir = os.path.dirname(sys.argv[0])
bindir = basedir + "/dist/bin/"
libdir = basedir + "/dist/lib64:" + basedir + "/dist/lib"
wine_path = bindir + "/wine64"

#extract if needed
if not os.path.exists(basedir + "/dist") or \
        not os.path.exists(basedir + "/dist/version") or \
        not filecmp.cmp(basedir + "/version", basedir + "/dist/version"):
    if os.path.exists(basedir + "/dist"):
        shutil.rmtree(basedir + "/dist")
    tar = tarfile.open(basedir + "/proton_dist.tar.gz", mode="r:gz")
    tar.extractall(path=basedir + "/dist")
    tar.close()
    shutil.copy(basedir + "/version", basedir + "/dist/")

env = dict(os.environ)

env["WINEDEBUG"] = "-all"
lfile_path = None

#env["WINEDEBUG"] = "+tid,+seh,+steamclient"
#lfile_path = env["HOME"] + "/steam-" + env["SteamGameId"] + ".log"

if not lfile_path is None:
    if os.path.exists(lfile_path):
        os.remove(lfile_path)
    lfile = open(lfile_path, "w")
else:
    lfile = None

if "LD_LIBRARY_PATH" in os.environ:
    env["LD_LIBRARY_PATH"] = libdir + ":" + env["LD_LIBRARY_PATH"]
else:
    env["LD_LIBRARY_PATH"] = libdir

if not os.path.isdir(basedir + "/dist/share/default_pfx"):
    #make default prefix
    env["WINEPREFIX"] = basedir + "/dist/share/default_pfx"
    run_wine([wine_path, "wineboot"])
    run_wine([bindir + "/wineserver", "-w"])

prefix = os.environ["STEAM_COMPAT_DATA_PATH"] + "/pfx/"
env["WINEPREFIX"] = prefix

if not os.path.isdir(prefix):
    #copy default prefix into place
    shutil.copytree(basedir + "/dist/share/default_pfx", prefix, symlinks=True)

#copy steam files into place
steamdir = env["HOME"] + "/.steam/steam/legacycompat/"
dst = prefix + "/drive_c/Program Files (x86)/"
makedirs(dst + "Steam")
filestocopy = ["steamclient.dll",
        "steamclient64.dll",
        "Steam.dll"]
for f in filestocopy:
    if os.path.isfile(steamdir + f):
        shutil.copy(steamdir + f, dst + "Steam/" + f)

#copy openvr files into place
dst = prefix + "/drive_c/vrclient/bin/"
makedirs(dst)
shutil.copy(basedir + "/dist/lib/wine/fakedlls/vrclient.dll", dst)
shutil.copy(basedir + "/dist/lib64/wine/fakedlls/vrclient_x64.dll", dst)

#parse linux openvr config and present it in win32 format to the app.
#logic from openvr's CVRPathRegistry_Public::GetPaths

#check environment for overrides
vr_runtime = None
if "VR_OVERRIDE" in env:
    vr_runtime = env["VR_OVERRIDE"]
    env.pop("VR_OVERRIDE")

vr_config = None
if "VR_CONFIG_PATH" in env:
    vr_config = env["VR_CONFIG_PATH"]
    env.pop("VR_CONFIG_PATH")

vr_log = None
if "VR_LOG_PATH" in env:
    vr_log = env["VR_LOG_PATH"]
    env.pop("VR_LOG_PATH")

#load from json if needed
if vr_runtime is None or \
        vr_config is None or \
        vr_log is None:
    try:
        if "XDG_CONFIG_HOME" in env:
            path = env["XDG_CONFIG_HOME"]
        else:
            path = env["HOME"] + "/.config"
        path = path + "/openvr/openvrpaths.vrpath"

        j = json.load(open(path, "r"))

        if vr_runtime is None:
            vr_runtime = j["runtime"][0]

        if vr_config is None:
            vr_config = j["config"][0]

        if vr_log is None:
            vr_log = j["log"][0]
    except:
        pass

makedirs(prefix + "/drive_c/users/steamuser/Local Settings/Application Data/openvr")

#remove existing file
vrpaths_name = prefix + "/drive_c/users/steamuser/Local Settings/Application Data/openvr/openvrpaths.vrpath"
if os.path.exists(vrpaths_name):
    os.remove(vrpaths_name)

#dump new file
if not vr_runtime is None:
    try:
        env["PROTON_VR_RUNTIME"] = vr_runtime

        j = { "runtime": [ "C:\\vrclient\\", "C:\\vrclient" ] }

        if not vr_config is None:
            win_vr_config = subprocess.check_output([wine_path, "winepath", "-w", vr_config], env=env, stderr=open("/dev/null", "w"))
            j["config"] = [ win_vr_config.strip() ]

        if not vr_log is None:
            win_vr_log = subprocess.check_output([wine_path, "winepath", "-w", vr_log], env=env, stderr=open("/dev/null", "w"))
            j["log"] = [ win_vr_log.strip() ]

        j["version"] = 1
        j["jsonid"] = "vrpathreg"

        json.dump(j, open(vrpaths_name, "w"), indent=2)
    except:
        pass

#start target app
run_wine([wine_path] + sys.argv[1:])

sys.exit(0)