#!/usr/bin/bash
set -e

for arg in "$@"; do declare "$arg"='1'; done
if [ ! -v release ]; then debug=1; fi
if [ -v debug ];   then echo "[web debug build]"; fi
if [ -v release ]; then echo "[web release build]"; fi

# If emsdk is installed but not sourced in this shell, try the common location.
if ! command -v emcc >/dev/null 2>&1; then
    if [ -f "$HOME/emsdk/emsdk_env.sh" ]; then
        # shellcheck disable=SC1091
        source "$HOME/emsdk/emsdk_env.sh" >/dev/null
    fi
fi

if ! command -v emcc >/dev/null 2>&1; then
    echo "error: emcc not found. Source emsdk_env.sh or add emcc to PATH." >&2
    exit 1
fi

mkdir -p build_web

incs="-Isrc -Isrc/external/glad"
flags="-Wall -Wextra -Werror -Wno-error=experimental -Wno-error=unused-parameter -Wformat=2 -Wundef -Wshadow -Wno-missing-field-initializers -Wno-missing-braces -Wno-writable-strings \
    -fdiagnostics-absolute-paths \
    -nostdlib++ -fno-exceptions"
wasmflags="-sALLOW_MEMORY_GROWTH=0 -sTOTAL_STACK=5MB -sINITIAL_MEMORY=256MB \
    -sUSE_SDL=3 -sUSE_WEBGL2=1 -sMIN_WEBGL_VERSION=2 -sMAX_WEBGL_VERSION=2 -sFULL_ES3=1 \
    -sASYNCIFY=1 -sASSERTIONS=2 \
    -sEXIT_RUNTIME=0 \
    -msimd128"

if [ -v debug ]; then
    flags="$flags -g -gsource-map -DDEBUG_BUILD=1"
else
    flags="$flags -O3 -DDEBUG_BUILD=0"
fi

emcc -o build_web/text_editor.html \
    --shell-file data/shell.html \
    $flags $incs $wasmflags \
    src/text_editor.cpp \
    -lm

echo "Wrote build_web/text_editor.html"