#!/usr/bin/env bash

set -xe

[ $# -eq 4 ]

SCRIPT_DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
SRC_PATH="$1"
BUILD_PATH="$2"
TARGET_CPU="$3"
BUILD="$4"
BUILD_DIR="${SCRIPT_DIR}/build-${TARGET_CPU}"

if [ -z "${N2S_ANGLE_PATH}" ]; then
    mkdir -p "${BUILD_PATH}"
    cp -r "${BUILD_DIR}/"* "${BUILD_PATH}"
    exit 0
fi

cd "${SRC_PATH}"

gn gen "${BUILD_PATH}"
gn args "${BUILD_PATH}" \
    --list \
    --overrides-only \
    --short \
    --args="target_cpu=\"${TARGET_CPU}\" target_os=\"android\" \
    is_component_build=false \
    is_debug=false \
    dcheck_always_on=false \
    symbol_level=0 \
    angle_standalone=false \
    angle_build_all=false \
    angle_expose_non_conformant_extensions_and_versions=true \
    android32_ndk_api_level=26 \
    android64_ndk_api_level=26 \
    angle_enable_vulkan=true \
    angle_enable_gl=false \
    angle_enable_d3d9=false \
    angle_enable_d3d11=false \
    angle_enable_null=false \
    angle_enable_metal=false \
    angle_enable_wgpu=false \
    angle_enable_swiftshader=false \
    angle_enable_essl=false \
    angle_enable_glsl=false \
    angle_enable_hlsl=false \
    angle_enable_commit_id=false \
    angle_has_histograms=false \
    use_custom_libcxx=false \
    angle_has_rapidjson=false \
    build_angle_end2end_tests_aosp=true \
    build_angle_trace_tests=false \
    angle_test_enable_system_egl=true"
gn gen "${BUILD_PATH}"

if [[ "${BUILD}" == "build" ]]; then
    REAL_SRC_PATH="$(grep -e '--root=' ${BUILD_PATH}/build.ninja | sed 's|^.*--root=\([^ ]*\) .*$|\1|')"
    shopt -s globstar
    rm -rf "${BUILD_DIR}"
    for file in ${BUILD_PATH}/**/*.ninja
    do
        new_name=$(echo "${file}" | sed "s|${BUILD_PATH}|${BUILD_DIR}|")
        mkdir -p "$(dirname ${new_name})"
        sed "s|${REAL_SRC_PATH}|/ninja-to-soong-angle|g" "${file}" > "${new_name}"
    done
fi