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!/usr/bin/env python

–– coding: utf-8 ––

import os
import subprocess
import shutil

def main():

sdk_path = os.getenv('ANDROID_HOME')
ndk_path = os.getenv('NDK_HOME')
standalone_path = os.getenv('NDK_STANDALONE')
directory = build_directory(sdk_path, args.output.filestem_str , native_shared_libs)

# // Copy the additional native libs into the libs directory.
for name, path in native_shared_libs.items():
    shutil.copy(path,  os.path.join( directory, "libs/", "armeabi/",name)

# compile android_native_app_glue.c
cmd = os.path.join(standalone_path , "bin/" , "arm-linux-androideabi-gcc")
arg1 = os.path.join(ndk_path, "sources/" , "android/" ,"native_app_glue/", "android_native_app_glue.c")
arg2 = "-c"
arg3 = "-o"
arg4 = directory + "android_native_app_glue.o"

os.system(cmd + arg1 + arg2 + arg3 + arg4)

"""calling gcc to link a shared object"""
cmd = os.path.join(standalone_path , "bin/", "arm-linux-androideabi-gcc")
arg1 = passthrough
arg2 = os.path.join(directory , "android_native_app_glue.o")
arg3 = "-o" + os.path.join(directory ,"libs", "armeabi", "libmain.so")
arg4 = "-shared"
arg5 = "-Wl,-E"
os.system(cmd + arg1 + arg2 + arg3 + arg4 + arg5)

"""call ant debug"""

ant_command = "ant debug"
os.system(ant_command)

#copy apk file to required dest
shutil.copy(os.path.join( directory, "bin/", "rust-android-debug.apk"), output)

def find_native_libs(args: &Args) -> HashMap<String, Path> {

"""args  HashMap"""
base_path = os.path.join(args, "native");
native_shared_libs = {}
#for dirpath, dirname, filenames in os.walk(base_path):

for dirs in os.listdir(base_path):
    if os.path.isdir(dirs):
        for dir in dirs:
            path = os.path.join(base_path, dirs,dir)
            for file in os.listdir(path):
                if file.starts_with("lib") and file.endwith(".so"):
                    native_shared_libs.update(file, path)

return native_shared_libs

def build_directory(sdk_dir, crate_name, libs):

"""
sdk_dir : Path
crate_name : str
libs: HashMap<String, Path>

return: Tempdir

"""temp_dir ="android-rs-glue-rust-to-apk"
build_directory = os.mkdir(temp_dir)

if len(libs) > 0:
    src_path = os.path.join(temp_dir ,"src/rust/glutin");
    os.mkdirs(src_path)
    java_file = open(os.path.join( src_path, "MainActivity.java") ,"rw")
    java_file.write((java_src(libs) )
    activity_name = "rust.glutin.MainActivity"
    java_file.flush()
    java_file.close()
else:
    activity_name = "android.app.NativeActivity"

    manifest_file=os.path.join(build_directory, "AndroidManifest.xml")
    manifest_file = open(manifest_file, "rw")
    manifest_file.write(build_manifest(crate_name, activity_name))
    manifest_file.close()

    build_xml = os.path.join(build_directory, "build.xml")
    build_xml = open(build.xml, "rw")
    build_xml.write(build_build_xml() )
    build_xml.close()

    local_pro = os.path.join(build_directory, "local.properties")
    local_pro  = open(local_pro, "rw")
    local_pro.write(build_local_properties())
    local_pro.close()

    project_pro = os.path.join(build_directory, "project.properties")
    project_pro = open(project_pro, "rw")
    project_pro.write(build_project_properties())
    project_pro.close()

    libs_path = os.path.join(build_directory, "libs/", "armeabi")
    os.makedirs(libs_path)

    return build_directory

def java_src(libs) {

"""
libs: HashMap,
returns string
"""libs_string =""

for  name, _ in libs.items():
    """// Strip off the'lib'prefix and".so" suffix. This is safe since libs only get added
    // to the hash map if they start with lib.
    """line ="        System.loadLibrary(\"{}\");\n".format(name[3:len(name)-3]);
    libs_string = libs_string + line;

ret = """package rust.glutin;

public class MainActivity extends android.app.NativeActivity {{
    static {{{0}
    }}
}}""".format(libs_string)
return ret

def build_manifest(crate_name , activity_name):

    return """<?xml version="1.0"encoding="utf-8"?>

<!– BEGIN_INCLUDE(manifest) –>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android”

    package="com.example.native_activity"
    android:versionCode="1"
    android:versionName="1.0">

<uses-sdk android:minSdkVersion="9" />

<uses-feature android:glEsVersion="0x00020000" android:required="true"></uses-feature>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<application android:label="{0}">
    <activity android:name="{1}"
            android:label="{0}"
            android:configChanges="orientation|keyboardHidden">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>
<!– END_INCLUDE(manifest) –>
“””.format(crate_name, activity_name)

def build_build_xml():

    return """<?xml version="1.0"encoding="UTF-8"?>

<project name=”rust-android” default=”help”>

<property file="local.properties" />
<loadproperties srcFile="project.properties" />
<import file="custom_rules.xml" optional="true" />
<import file="${{sdk.dir}}/tools/ant/build.xml" />

</project>
“””

def build_local_properties(sdk_dir):

return "sdk.dir={0}".format(os.path.abspath(sdk_dir))

def build_project_properties():

return "target=android-19"

main()