#!python
import os, subprocess


# Local dependency paths, adapt them to your setup
godot_headers_path = "../../godot_headers/"
godot_bin_path = "../../godot_fork/bin/"
godot_lib_path = "../../godot_fork/bin/"


env = Environment()

if ARGUMENTS.get("use_llvm", "no") == "yes":
    env["CXX"] = "clang++"

target = ARGUMENTS.get("target", "core")
platform = ARGUMENTS.get("p", "linux")


godot_name = "godot." + ("x11" if platform == "linux" else platform) + ".tools.64"


def add_sources(sources, directory):
    for file in os.listdir(directory):
        if file.endswith('.cpp'):
            sources.append(directory + '/' + file)


if target == "core":
    if platform == "linux":
        env.Append(CCFLAGS = ['-g','-O3', '-std=c++14'])
    
    env.Append(CPPPATH=['.', godot_headers_path])

    if platform == "windows":
        env.Append(LIBS=[godot_name + '.lib'])
        env.Append(LIBPATH=[godot_lib_path])

    env.Append(CPPFLAGS=['-D_GD_CPP_CORE_API_IMPL'])

    sources = []
    add_sources(sources, "godot_cpp/core")

    library = env.SharedLibrary(target='godot_cpp_core', source=sources)
    Default(library)


elif target == "bindings":

    if ARGUMENTS.get("generate_bindings", "no") == "yes":
        godot_executable = godot_bin_path + godot_name

        if env["CXX"] == "clang++":
            godot_executable += ".llvm"

        if platform == "windows":
            godot_executable += ".exe"
        
        # TODO Generating the API should be done only if the Godot build is more recent than the JSON file
        json_api_file = 'godot_api.json'

        subprocess.call([godot_executable, '--gdnative-generate-json-api', json_api_file])

        binding_generator_executable = '../binding_generator/target/debug/binding_generator'
        if platform == "windows":
            binding_generator_executable += ".exe"

        # TODO Should that be the job of the generator?
        if not os.path.isdir('godot_cpp/impl'):
            os.mkdir('godot_cpp/impl')

        # Note: the binding generator should have been built before
        subprocess.call([binding_generator_executable, json_api_file, 'godot_cpp/'])

    if platform == "linux":
        if env["CXX"] == "clang++":
            env.Append(CCFLAGS = ['-Wno-writable-strings'])
        else:
            env.Append(CCFLAGS = ['-Wno-write-strings', '-Wno-return-local-addr'])
        
        env.Append(CCFLAGS = ['-g','-O3', '-std=c++14'])
        env.Append(LINKFLAGS = ['-Wl,-R,\'$$ORIGIN\''])
    env.Append(CPPPATH=['.', godot_headers_path, './godot_cpp'])

    if platform == "windows":
        env.Append(LIBS=[godot_name])
        env.Append(LIBPATH=[godot_lib_path])

    env.Append(LIBS=['godot_cpp_core'])
    env.Append(LIBPATH=['.'])

    env.Append(CPPFLAGS=['-D_GD_CPP_BINDING_IMPL'])

    sources = []
    add_sources(sources, "godot_cpp/impl/")

    library = env.SharedLibrary(target='godot_cpp_bindings', source=sources)
    Default(library)