#!/usr/bin/env bash

export CURRENT_VERSION=${CURRENT_VERSION:-develop};

if [ "$NODE_ENV" = "production" ];  then
    export BUILD_MODE="release";
else
    export BUILD_MODE=${1:-debug};
fi

export BUILD_NAME="${BUILD_NAME:-render-wasm}"
export CARGO_BUILD_TARGET=${CARGO_BUILD_TARGET:-"wasm32-unknown-emscripten"};
export SKIA_BINARIES_URL=${SKIA_BINARIES_URL:-"https://github.com/penpot/skia-binaries/releases/download/0.87.0/skia-binaries-e551f334ad5cbdf43abf-wasm32-unknown-emscripten-gl-svg-textlayout-binary-cache-webp.tar.gz"}

# 256 MB of initial heap to perform less
# initial calls to memory grow.
export EM_INITIAL_HEAP=$((256 * 1024 * 1024))

# 1.0 doubles the heap on every growth.
export EM_MEMORY_GROWTH_GEOMETRIC_STEP="0.8"

# Malloc implementation to use.
# - dlmalloc: a powerful general-purpose malloc.
# - emmalloc: a simple and compact malloc designed for emscripten.
# - emmalloc-debug: use emmalloc and add extra assertion checks.
# - emmalloc-memvalidate: use emmalloc with assertions+heap consistency checking.
# - emmalloc-verbose: use emmalloc with assertions + verbose logging.
# - emmalloc-memvalidate-verbose: use emmalloc with assertions + heap consistency checking + verbose logging.
# Default: dlmalloc
export EM_MALLOC="dlmalloc"

export EMCC_CFLAGS="--no-entry \
    --js-library src/js/wapi.js \
    -sASSERTIONS=1 \
    -sALLOW_TABLE_GROWTH=1 \
    -sALLOW_MEMORY_GROWTH=1 \
    -sINITIAL_HEAP=$EM_INITIAL_HEAP \
    -sMEMORY_GROWTH_GEOMETRIC_STEP=$EM_MEMORY_GROWTH_GEOMETRIC_STEP \
    -sERROR_ON_UNDEFINED_SYMBOLS=0 \
    -sMAX_WEBGL_VERSION=2 \
    -sEXPORT_NAME=createRustSkiaModule \
    -sEXPORTED_RUNTIME_METHODS=GL,stringToUTF8,HEAPU8,HEAP32,HEAPU32,HEAPF32 \
    -sENVIRONMENT=web \
    -sMODULARIZE=1 \
    -sEXPORT_ES6=1";

export EM_CACHE="/tmp/emsdk_cache";

export CARGO_PARAMS="${@:2}";

if [ "$BUILD_MODE" = "release" ]; then
    export CARGO_PARAMS="--release $CARGO_PARAMS"
    export EMCC_CFLAGS="-Os $EMCC_CFLAGS"
else
    # TODO: Extra parameters that could be good to look into:
    #        -gseparate-dwarf
    #        -gsplit-dwarf
    #        -gsource-map
    export EMCC_CFLAGS="-g $EMCC_CFLAGS -sVERBOSE=1 -sMALLOC=$EM_MALLOC"
fi

function clean {
    cargo clean;
}

function build {
    cargo build $CARGO_PARAMS;
}

function copy_artifacts {
    DEST=$1;

    cp target/wasm32-unknown-emscripten/$BUILD_MODE/render_wasm.js $DEST/$BUILD_NAME.js;
    cp target/wasm32-unknown-emscripten/$BUILD_MODE/render_wasm.wasm $DEST/$BUILD_NAME.wasm;

    sed -i "s/render_wasm.wasm/$BUILD_NAME.wasm?version=$CURRENT_VERSION/g" $DEST/$BUILD_NAME.js;

    npx esbuild target/wasm32-unknown-emscripten/$BUILD_MODE/render_wasm.js \
        --log-level=error \
        --outfile=$DEST/worker/render.js \
        --platform=neutral \
        --format=iife \
        --global-name=WasmModule;
}

function copy_shared_artifact {
    SHARED_FILE=$(find target/wasm32-unknown-emscripten -name render_wasm_shared.js | head -n 1);
    cp $SHARED_FILE ../frontend/src/app/render_wasm/api/shared.js;
}