@ECHO OFF
REM Copyright 2015 Ben Vanik. All Rights Reserved.

SET DIR=%~dp0

REM ============================================================================
REM Environment Validation
REM ============================================================================

CALL :check_python
IF %_RESULT% NEQ 0 (
  ECHO.
  ECHO Python 3.4+ must be installed and on PATH:
  ECHO https://www.python.org/
  GOTO :eof
)


REM ============================================================================
REM Trampoline into xenia-build
REM ============================================================================

"%PYTHON_EXE%" xenia-build %*
EXIT /b %ERRORLEVEL%


REM ============================================================================
REM Utilities
REM ============================================================================

:check_python
SETLOCAL ENABLEDELAYEDEXPANSION

SET FOUND_PATH=""

SET CANDIDATE_PATHS[0]=C:\python37\python.exe
SET CANDIDATE_PATHS[1]=C:\python36\python.exe
SET CANDIDATE_PATHS[2]=C:\python35\python.exe
SET CANDIDATE_PATHS[3]=C:\python34\python.exe
SET OUTPUT_INDEX=4

FOR /F "usebackq" %%l IN (`2^>NUL where python3`) DO (
  SET CANDIDATE_PATHS[!OUTPUT_INDEX!]=%%l
  SET /A OUTPUT_INDEX+=1
)
FOR /F "usebackq" %%l IN (`2^>NUL where python`) DO (
  SET CANDIDATE_PATHS[!OUTPUT_INDEX!]=%%l
  SET /A OUTPUT_INDEX+=1
)

SET CANDIDATE_INDEX=0
:check_candidate_loop
IF NOT DEFINED CANDIDATE_PATHS[%CANDIDATE_INDEX%] (
  GOTO :found_python
)
CALL SET CANDIDATE_PATH=%%CANDIDATE_PATHS[%CANDIDATE_INDEX%]%%
IF NOT EXIST %CANDIDATE_PATH% (
  SET /A CANDIDATE_INDEX+=1
  GOTO :check_candidate_loop
)
CALL :get_size %CANDIDATE_PATH%
IF %_SIZE% NEQ 0 (
  SET FOUND_PATH=%CANDIDATE_PATH%
  GOTO :found_python
)
SET /A CANDIDATE_INDEX+=1
GOTO :check_candidate_loop

:found_python
IF %FOUND_PATH%=="" (
  ECHO ERROR: no Python executable found on PATH.
  ECHO Make sure you can run 'python' or 'python3' in a Command Prompt.
  ENDLOCAL & SET _RESULT=1
  GOTO :eof
)

CMD /C %FOUND_PATH% -c "import sys; sys.exit(1 if not sys.version_info[:2] >= (3, 4) else 0)"
IF %ERRORLEVEL% NEQ 0 (
  ECHO ERROR: Python version mismatch - not 3.4+
  ECHO Found Python executable was '%FOUND_PATH%'.
  ENDLOCAL & SET _RESULT=1
  GOTO :eof
)

ENDLOCAL & (
  SET _RESULT=0
  SET PYTHON_EXE=%FOUND_PATH%
)
GOTO :eof

:get_size
SET _SIZE=%~z1
goto :eof