@echo off
setlocal enabledelayedexpansion

:: build.bat -- Compile the sketch using arduino-cli
::
:: Reads all settings from .anvil.toml. No Anvil binary required.
::
:: Usage:
::   build.bat                Compile (verify only)
::   build.bat --board mega   Use a named board
::   build.bat --clean        Delete build cache first
::   build.bat --verbose      Show full compiler output

set "SCRIPT_DIR=%~dp0"
set "SCRIPT_DIR=%SCRIPT_DIR:~0,-1%"
set "CONFIG=%SCRIPT_DIR%\.anvil.toml"

if not exist "%CONFIG%" (
    echo FAIL: No .anvil.toml found in %SCRIPT_DIR%
    exit /b 1
)

:: -- Parse .anvil.toml (flat keys) ----------------------------------------
for /f "usebackq tokens=1,* delims==" %%a in ("%CONFIG%") do (
    set "_K=%%a"
    if not "!_K:~0,1!"=="#" if not "!_K:~0,1!"=="[" (
        set "_K=!_K: =!"
        set "_V=%%b"
        if defined _V (
            set "_V=!_V: =!"
            set "_V=!_V:"=!"
        )
        if "!_K!"=="name" set "SKETCH_NAME=!_V!"
        if "!_K!"=="default" set "DEFAULT_BOARD=!_V!"
        if "!_K!"=="warnings" set "WARNINGS=!_V!"
    )
)

if "%SKETCH_NAME%"=="" (
    echo FAIL: Could not read project name from .anvil.toml
    exit /b 1
)

set "SKETCH_DIR=%SCRIPT_DIR%\%SKETCH_NAME%"
set "BUILD_DIR=%SCRIPT_DIR%\.build"

:: -- Parse arguments ------------------------------------------------------
set "DO_CLEAN=0"
set "VERBOSE="
set "BOARD_NAME="

:parse_args
if "%~1"=="" goto done_args
if "%~1"=="--board" set "BOARD_NAME=%~2" & shift & shift & goto parse_args
if "%~1"=="--clean" set "DO_CLEAN=1" & shift & goto parse_args
if "%~1"=="--verbose" set "VERBOSE=--verbose" & shift & goto parse_args
if "%~1"=="--help" goto show_help
if "%~1"=="-h" goto show_help
echo FAIL: Unknown option: %~1
exit /b 1

:show_help
echo Usage: build.bat [--board NAME] [--clean] [--verbose]
echo   Compiles the sketch. Settings from .anvil.toml.
echo   --board NAME selects a board from [boards.NAME].
exit /b 0

:done_args

:: -- Resolve board --------------------------------------------------------
if "%BOARD_NAME%"=="" set "BOARD_NAME=%DEFAULT_BOARD%"

if "%BOARD_NAME%"=="" (
    echo FAIL: No default board set in .anvil.toml.
    echo.
    echo   Add a default to the [build] section of .anvil.toml:
    echo     default = "uno"
    echo.
    echo   And make sure a matching [boards.uno] section exists:
    echo     [boards.uno]
    echo     fqbn = "arduino:avr:uno"
    echo.
    echo   Or with Anvil:  anvil board --default uno
    echo   List boards:    anvil board --listall
    echo                   arduino-cli board listall
    exit /b 1
)

set "BOARD_SECTION=[boards.%BOARD_NAME%]"
set "IN_SECTION=0"
set "FQBN="
for /f "usebackq tokens=*" %%L in ("%CONFIG%") do (
    set "_LINE=%%L"
    if "!_LINE!"=="!BOARD_SECTION!" (
        set "IN_SECTION=1"
    ) else if "!IN_SECTION!"=="1" (
        if "!_LINE:~0,1!"=="[" (
            set "IN_SECTION=0"
        ) else if not "!_LINE:~0,1!"=="#" (
            for /f "tokens=1,* delims==" %%a in ("!_LINE!") do (
                set "_BK=%%a"
                set "_BK=!_BK: =!"
                set "_BV=%%b"
                if defined _BV (
                    set "_BV=!_BV: =!"
                    set "_BV=!_BV:"=!"
                )
                if "!_BK!"=="fqbn" set "FQBN=!_BV!"
            )
        )
    )
)

if "!FQBN!"=="" (
    echo FAIL: No [boards.%BOARD_NAME%] section in .anvil.toml.
    echo.
    echo   Add it to .anvil.toml:
    echo     [boards.%BOARD_NAME%]
    echo     fqbn = "arduino:avr:uno"    ^(replace with your board^)
    echo.
    echo   Or with Anvil:  anvil board --add %BOARD_NAME%
    echo   List boards:    anvil board --listall
    echo                   arduino-cli board listall
    exit /b 1
)

if not "%BOARD_NAME%"=="%DEFAULT_BOARD%" (
    echo ok   Using board: %BOARD_NAME% -- %FQBN%
)

:: -- Preflight ------------------------------------------------------------
where arduino-cli >nul 2>nul
if errorlevel 1 (
    echo FAIL: arduino-cli not found in PATH.
    exit /b 1
)

if not exist "%SKETCH_DIR%" (
    echo FAIL: Sketch directory not found: %SKETCH_DIR%
    exit /b 1
)

:: -- Clean ----------------------------------------------------------------
if "%DO_CLEAN%"=="1" (
    if exist "%BUILD_DIR%" (
        echo Cleaning build cache...
        rmdir /s /q "%BUILD_DIR%"
    )
)

:: -- Build include flags --------------------------------------------------
set "BUILD_FLAGS="
for %%d in (lib\hal lib\app) do (
    if exist "%SCRIPT_DIR%\%%d" (
        set "BUILD_FLAGS=!BUILD_FLAGS! -I%SCRIPT_DIR%\%%d"
    )
)
set "BUILD_FLAGS=!BUILD_FLAGS! -Werror"

:: -- Compile --------------------------------------------------------------
echo Compiling %SKETCH_NAME%...
echo   Board:  %FQBN%
echo   Sketch: %SKETCH_DIR%
echo.

if not exist "%BUILD_DIR%" mkdir "%BUILD_DIR%"

arduino-cli compile --fqbn %FQBN% --build-path "%BUILD_DIR%" --warnings %WARNINGS% --build-property "compiler.cpp.extra_flags=%BUILD_FLAGS%" --build-property "compiler.c.extra_flags=%BUILD_FLAGS%" %VERBOSE% "%SKETCH_DIR%"
if errorlevel 1 (
    echo.
    echo FAIL: Compilation failed.
    exit /b 1
)

echo.
echo ok   Compile succeeded.
echo.