#!/bin/bash
Fail()
{
    echo "ERROR($0): $1"
    exit 1
}

./patch_version_numbers.py || Fail "Error updating version numbers."

echo "Trimming trailing whitespace in source code."
for file in template/astronomy.{c,cs,ts,py} ../source/c/astronomy.h; do
    node trimspace.js ${file} || Fail "Cannot trim whitespace from template file: ${file}"
done

echo "Generating target code."
./generate source || Fail "Problem generating target code."

echo "Trimming trailing whitespace in target code."
for file in ../source/c/astronomy.c ../source/js/astronomy.ts ../source/python/astronomy/astronomy.py ../source/csharp/astronomy.cs; do
    node trimspace.js ${file} || Fail "Cannot trim whitespace from target file: ${file}"
done

# C# is a special case: we have to compile the code to get its documentation.
echo "Building C# code to get documentation XML."
cd dotnet/csharp_test || "Cannot change to directory dotnet/csharp_test"
dotnet build --property:OutputPath=${PWD}/exe || Fail "Error building C# source code"
cd ../../csdown || Fail "Error changing to csdown directory"
./build || exit 1

exe/csdown \
    csharp_prefix.md \
    ../dotnet/csharp_test/exe/astronomy.dll \
    ../dotnet/csharp_test/exe/astronomy.xml \
    ../../source/csharp/README.md \
    || Fail "Error generating C# documentation."

cd .. || Fail "Error changing back to generate directory"
./check_internal_links.py ../source/csharp/README.md || exit 1

if [[ ! -d node_modules ]]; then
    # On Intel x64 architecture, we can use the
    # native binary in google-closure-compiler-linux.
    # But in other architectures, we have to fall back to
    # the Java version in google-closure-compiler-java.
    ARCH=$(uname -m) || Fail "Cannot determine machine architecture."
    echo "Install NodeJS dev dependencies for architecture ${ARCH}"
    if [[ "${ARCH}" == "x86_64" ]]; then
        npm ci || Fail "Error installing npm dev dependencies."
    else
        # Fail early if java is not installed.
        # This will save the user grief trying to figure out what's wrong.
        java -version || Fail "Must install java/openjdk before building Astronomy Engine on non-Intel platforms."

        # Work around bug in 'npm ci' by explicitly disabling optional dependencies.
        # This prevents 'npm ci' from installing google-closure-compiler-linux,
        # which contains the incorrect binary that works only on Intel x64.
        npm ci --no-optional || Fail "Error installing npm dev dependencies (optional packages disabled)."
    fi
fi

echo "Compiling TypeScript to JavaScript."
npm run build || Fail "Error in typescript compiler"

echo "Bundling JavaScript code for Browser."
npm run build:browser || Fail "Error building browser bundle"

echo "Minifying JavaScript code."
npm run minify || Fail "Error minifying astronomy.js"
npm run minify:browser || Fail "Error minifying astronomy.browser.js"
./patch_readme.py ../README.md ../source/js/astronomy.browser.min.js || Fail "Error patching README.md."

# Making this step optional because the website is not ready for prime time.
if [[ -d ../website ]]; then
    echo "Generating JS documentation in JSON format."
    npm run docs:json || Fail "Error generating JSON documentation."
    node jsdoc_strip_path.js || Fail "Error stripping absolute paths."
fi

echo "Generating JS documentation in Markdown format."
npm run docs:md || Fail "Error generating JS documentation."
./check_internal_links.py ../source/js/README.md || exit 1
./sort_js_functions.py ../source/js/README.md || exit 1

if [[ -d ../tutorials ]]; then
    if [[ -d html ]]; then
        echo "Generating JS documentation in HTML format for local viewing."
        rm -rf html
        npm run docs:html || Fail "Error generating HTML preview"
    else
        echo "(Skipping local HTML generation because html directory does not exist.)"
    fi
fi

if [[ -f disable_generate_c_docs ]]; then
    echo "Generation of C documentation is disabled."
else
    echo "Generating C documentation."
    cd ../source/c || Fail "Error changing directory to ../source/c"
    rm -rf xml
    doxygen Doxyfile > doxygen.log || Fail "Error in doxygen"
    cd xml || Fail "Error changinge to xml directory"
    echo "Merging doxygen XML files."
    xsltproc combine.xslt index.xml > all.xml || Fail "Error merging doxygen xml"
    cd .. || Fail "Error changing to parent directory"
    if [[ ! -d ../../generate/hydrogen/node_modules/xml2js ]]; then
        pushd ../../generate/hydrogen > /dev/null || Fail "Cannot pushd hydrogen"
        npm ci || Fail "Error installing Node modules for hydrogen"
        popd
    fi
    echo "Translating doxygen XML to Markdown."
    node ../../generate/hydrogen/hydrogen.js ../../generate/hydrogen/c_prefix.md ./xml/all.xml || Fail "Error in hydrogen.js"
    cd ../../generate || Fail "Error changing directory back"
    ./check_internal_links.py ../source/c/README.md || exit 1
fi

echo "Generating Python documentation."
python3 pydown/pydown.py pydown/py_prefix.md ../source/python/astronomy/astronomy.py ../source/python/README.md || Fail "Error generating Markdown from Python source."
./check_internal_links.py ../source/python/README.md || exit 1

echo "Making redundant copies of source in demo folders."
cp -v ../source/js/astronomy.browser.js ../demo/browser/ || exit $?
cp -v ../source/js/astronomy.js ../demo/nodejs/  || exit $?
cp -v ../source/python/astronomy/astronomy.py ../demo/python/  || exit $?

exit 0