@echo off
setlocal enabledelayedexpansion

rem Install Codex skills from this Playbook snapshot into CODEX_HOME.
rem - Source: <snapshot>\codex\skills\<skill-name>\
rem - Dest:   %CODEX_HOME%\skills\<skill-name>\  (default CODEX_HOME=%USERPROFILE%\.codex)
rem
rem Usage:
rem   install_codex_skills.bat -all
rem   install_codex_skills.bat -skills style-cleanup,commit-message
rem   install_codex_skills.bat -local -all
rem
rem Notes:
rem - Codex loads skills at startup; restart `codex` after installation.
rem - Existing destination skill dirs are backed up with a random suffix.

set "SCRIPT_DIR=%~dp0"
for %%I in ("%SCRIPT_DIR%..") do set "SRC=%%~fI"
set "SKILLS_SRC_ROOT=%SRC%\\codex\\skills"

set "LOCAL_MODE=0"
set "INSTALL_ALL=0"
set "SKILLS="
:parse_opts
if "%~1"=="" goto opts_done
if /I "%~1"=="-help" goto show_help
if /I "%~1"=="-h" goto show_help
if /I "%~1"=="-local" (
  set "LOCAL_MODE=1"
  shift
  goto parse_opts
)
if /I "%~1"=="-l" (
  set "LOCAL_MODE=1"
  shift
  goto parse_opts
)
if /I "%~1"=="-all" (
  set "INSTALL_ALL=1"
  shift
  goto parse_opts
)
if /I "%~1"=="-skills" (
  if "%~2"=="" (
    echo ERROR: -skills requires a value.
    exit /b 1
  )
  set "SKILLS=%~2"
  shift
  shift
  goto parse_opts
)
echo ERROR: Unknown option: %~1
exit /b 1
goto opts_done

:opts_done
set "CODEX_HOME=%CODEX_HOME%"
if "%LOCAL_MODE%"=="1" if "%CODEX_HOME%"=="" set "CODEX_HOME=%CD%\\.codex"
if "%CODEX_HOME%"=="" set "CODEX_HOME=%USERPROFILE%\\.codex"
set "SKILLS_DST_ROOT=%CODEX_HOME%\\skills"

if not exist "%SKILLS_SRC_ROOT%" (
  echo ERROR: skills source dir not found: "%SKILLS_SRC_ROOT%"
  exit /b 1
)

if not exist "%SKILLS_DST_ROOT%" mkdir "%SKILLS_DST_ROOT%"

if "%INSTALL_ALL%"=="1" if not "%SKILLS%"=="" (
  echo ERROR: use either -all or -skills, not both.
  exit /b 1
)
if "%INSTALL_ALL%"=="0" if "%SKILLS%"=="" (
  echo ERROR: -all or -skills is required.
  exit /b 1
)

if "%INSTALL_ALL%"=="1" (
  for /d %%D in ("%SKILLS_SRC_ROOT%\\*") do (
    set "NAME=%%~nD"
    if not "!NAME!"=="" if not "!NAME:~0,1!"=="." call :InstallOne "!NAME!"
  )
) else (
  set "SKILLS=%SKILLS:,= %"
  for %%S in (%SKILLS%) do call :InstallOne "%%~S"
)

:Done
echo Done. Skills installed to: "%SKILLS_DST_ROOT%"
endlocal
exit /b 0

:show_help
echo Usage:
echo   install_codex_skills.bat -all
echo   install_codex_skills.bat -skills style-cleanup,commit-message
echo.
echo Options:
echo   -local, -l    Install to .\\.codex ^(or CODEX_HOME if set^)
echo   -skills LIST  Comma/space-separated skill names
echo   -all          Install all skills
echo   -help, -h     Show this help
echo.
echo Env:
echo   CODEX_HOME    Target Codex home ^(default: %%USERPROFILE%%\\.codex^)
exit /b 0

:InstallOne
set "NAME=%~1"
set "SRC_DIR=%SKILLS_SRC_ROOT%\\%NAME%"
set "DST_DIR=%SKILLS_DST_ROOT%\\%NAME%"

if not exist "%SRC_DIR%" (
  echo ERROR: skill not found: %NAME% "%SRC_DIR%"
  exit /b 1
)

if exist "%DST_DIR%" (
  set "RAND=%RANDOM%"
  pushd "%SKILLS_DST_ROOT%"
  ren "%NAME%" "%NAME%.bak.!RAND!"
  popd
  echo Backed up existing skill: %NAME% -> %NAME%.bak.!RAND!
)

xcopy "%SRC_DIR%\\*" "%DST_DIR%\\" /e /i /y >nul
if errorlevel 1 (
  echo ERROR: failed to copy skill: %NAME%
  exit /b 1
)

echo Installed: %NAME%
exit /b 0