/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the LICENSE file
 * in the root directory of this source tree.
 */

import org.apache.tools.ant.filters.ReplaceTokens

// !!!
// Increment this when making changes to any of the native
// dependencies.
// !!!
final def CACHE_REVISION = 3

final def externalDir = new File("$projectDir/external")
final def downloadsDir = new File("$externalDir/downloads")
final def revisionFile = new File("$buildDir/external_cache_revision.txt")

final def getDownloadFileName = { final URL src ->
    final def i = src.file.lastIndexOf('/')
    return src.file.substring(i + 1)
}

final def isCacheOutOfDate = { final Integer revision ->
    if (!revisionFile.exists()) {
        return true
    } else {
        final def content = revisionFile.text
        return !content.isInteger() || content as Integer != revision
    }
}

task createNativeDepsDirectories {
    buildDir.mkdirs()
    downloadsDir.mkdirs()
    externalDir.mkdirs()
}

task cleanNative(type: Delete) {
    delete externalDir
}

task downloadGlog(dependsOn: createNativeDepsDirectories, type: Download) {
    src 'https://github.com/google/glog/archive/v0.3.5.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, 'glog-' + getDownloadFileName(src))
}

task prepareGlog(dependsOn: [downloadGlog], type: Copy) {
    onlyIf { isCacheOutOfDate(CACHE_REVISION) }
    from tarTree(downloadGlog.dest)
    from './overrides/glog/'
    include 'glog-0.3.5/src/**/*', 'Android.mk', 'config.h', 'build.gradle', 'CMakeLists.txt', 'ApplicationManifest.xml'
    includeEmptyDirs = false
    filesMatching('**/*.h.in') {
        filter(ReplaceTokens, tokens: [
                ac_cv_have_unistd_h: '1',
                ac_cv_have_stdint_h: '1',
                ac_cv_have_systypes_h: '1',
                ac_cv_have_inttypes_h: '1',
                ac_cv_have_libgflags: '0',
                ac_google_start_namespace: 'namespace google {',
                ac_cv_have_uint16_t: '1',
                ac_cv_have_u_int16_t: '1',
                ac_cv_have___uint16: '0',
                ac_google_end_namespace: '}',
                ac_cv_have___builtin_expect: '1',
                ac_google_namespace: 'google',
                ac_cv___attribute___noinline: '__attribute__ ((noinline))',
                ac_cv___attribute___noreturn: '__attribute__ ((noreturn))',
                ac_cv___attribute___printf_4_5: '__attribute__((__format__ (__printf__, 4, 5)))'
        ])
        it.path = (it.name - '.in')
    }
    into "$externalDir/glog"
}

task finalizeGlog(dependsOn: [prepareGlog], type: Copy) {
    from './overrides/glog/'
    include 'logging.cc'
    includeEmptyDirs = false
    into "$externalDir/glog/glog-0.3.5/src/"
}

task downloadDoubleConversion(dependsOn: createNativeDepsDirectories, type: Download) {
    src 'https://github.com/google/double-conversion/archive/v3.0.0.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, 'double-conversion-' + getDownloadFileName(src))
}

task prepareDoubleConversion(dependsOn: [downloadDoubleConversion], type: Copy) {
    from tarTree(downloadDoubleConversion.dest)
    from './overrides/DoubleConversion/'
    include 'double-conversion-3.0.0/**/*', 'build.gradle', 'CMakeLists.txt', 'ApplicationManifest.xml'
    includeEmptyDirs = false
    into "$externalDir/double-conversion"
}

task downloadBoost(dependsOn: createNativeDepsDirectories, type: Download) {
    src 'https://github.com/react-native-community/boost-for-react-native/releases/download/v1.63.0-0/boost_1_63_0.tar.gz'
    onlyIfNewer true
    overwrite true
    dest new File(downloadsDir, getDownloadFileName(src))
}

task prepareBoost(dependsOn: [downloadBoost], type: Copy) {
    from tarTree(resources.gzip(downloadBoost.dest))
    include 'boost_1_63_0/boost/**/*.hpp', 'boost_1_63_0/boost/**/*.h', 'boost/boost/**/*.hpp', 'boost/boost/**/*.h'
    includeEmptyDirs = false
    into "$externalDir/boost"
    doLast {
        file("$externalDir/boost/boost").renameTo("$externalDir/boost/boost_1_63_0")
    }
}

task downloadFolly(dependsOn: createNativeDepsDirectories, type: Download) {
    src 'https://github.com/facebook/folly/archive/v2018.09.10.00.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, 'folly-' + getDownloadFileName(src))
}

task prepareFolly(dependsOn: [downloadFolly], type: Copy) {
    onlyIf { isCacheOutOfDate(CACHE_REVISION) }
    from tarTree(downloadFolly.dest)
    from './overrides/Folly/'
    include 'folly-2018.09.10.00/folly/**/*', 'build.gradle', 'CMakeLists.txt', 'ApplicationManifest.xml'
    eachFile { it.path = it.path - "folly-2018.09.10.00/" }
    includeEmptyDirs = false
    into "$externalDir/folly"
}

//TODO: Get rid off this hack.
task finalizeFollyWithDemangle(dependsOn: [prepareFolly], type: Copy) {
    from './overrides/Folly/'
    include 'Demangle.h'
    into "$externalDir/folly/folly/detail/"
}

//TODO: Get rid off this hack.
task finalizeFolly(dependsOn: [finalizeFollyWithDemangle], type: Copy) {
    from './overrides/Folly/'
    include 'AsyncServerSocket.cpp'
    into "$externalDir/folly/folly/io/async/"
}

task downloadLibEvent(dependsOn: [], type: Download) {
    src 'https://github.com/priteshrnandgaonkar/libevent/archive/release-2.1.9.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, 'libevent-' + getDownloadFileName(src))
}

task prepareLibEvent(dependsOn: [downloadLibEvent], type: Copy) {
    onlyIf { isCacheOutOfDate(CACHE_REVISION) }
    from tarTree(downloadLibEvent.dest)
    from './overrides/LibEvent/'
    include 'libevent-release-2.1.9/**/*', 'build.gradle', 'ApplicationManifest.xml'
    includeEmptyDirs = false
    into "$externalDir/LibEvent"
}

task finalizeLibEvent(dependsOn: [prepareLibEvent], type: Copy) {
    from './overrides/LibEvent/'
    include 'event-config.h'
    includeEmptyDirs = false
    into "$externalDir/LibEvent/libevent-release-2.1.9/include/event2/"
}

task downloadOpenSSLSource(dependsOn: [], type: Download) {
    src 'https://github.com/passy/openssl-android/releases/download/1.1.0h/openssl-1.1.0h.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, getDownloadFileName(src))
}

task downloadOpenSSLLibs(dependsOn: [], type: Download) {
    src 'https://github.com/passy/openssl-android/releases/download/1.1.0h-r2/openssl-1.1.0h-r2-prebuilt.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, getDownloadFileName(src))
}

task prepareOpenSSL(dependsOn: [downloadOpenSSLSource, downloadOpenSSLLibs], type: Copy) {
    onlyIf { isCacheOutOfDate(CACHE_REVISION) }
    from tarTree(downloadOpenSSLSource.dest)
    from tarTree(downloadOpenSSLLibs.dest)
    from './overrides/OpenSSL/'
    include 'openssl-1.1.0h/**/*'
    include 'libs/**/*'
    includeEmptyDirs = false
    into "$externalDir/OpenSSL/"
}

task configureOpenSSL(dependsOn: [prepareOpenSSL], type: Exec) {
    onlyIf { isCacheOutOfDate(CACHE_REVISION) }
    workingDir "$externalDir/OpenSSL/openssl-1.1.0h/"
    // This is only to generate a buildconfig.h in the next step. I **believe**
    // that the options here don't really matter for that file.
    commandLine './Configure', 'dist'
}

task finalizeOpenSSL(dependsOn: [configureOpenSSL], type: Exec) {
    workingDir "$externalDir/OpenSSL/openssl-1.1.0h/"
    commandLine 'make', 'build_generated'
    onlyIf { !file("$externalDir/OpenSSL/openssl-1.1.0h/include/openssl/opensslconf.h").exists() }
}

task downloadRSocket(dependsOn: [], type: Download) {
    src 'https://github.com/priteshrnandgaonkar/rsocket-cpp/archive/0.10.3.tar.gz'
    onlyIfNewer true
    overwrite false
    dest new File(downloadsDir, 'rsocket-' + getDownloadFileName(src))
}

task prepareRSocket(dependsOn: [downloadRSocket], type: Copy) {
    from tarTree(downloadRSocket.dest)
    from './overrides/RSocket/'
    include 'rsocket-cpp-0.10.3/**/*', 'build.gradle', 'ApplicationManifest.xml', 'CMakeLists.txt'
    includeEmptyDirs = false
    into "$externalDir/RSocket"
}

task writeCacheRevision() {
    doLast {
        revisionFile.text = CACHE_REVISION.toString()
    }
}

def allTasks = [
    finalizeGlog,
    prepareDoubleConversion,
    prepareBoost,
    finalizeFolly,
    finalizeLibEvent,
    finalizeOpenSSL,
    prepareRSocket,
    writeCacheRevision,
]

allTasks.each { i ->
    i.onlyIf { isCacheOutOfDate(CACHE_REVISION) }
}

task prepareAllLibs() {
    onlyIf { isCacheOutOfDate(CACHE_REVISION) }
    dependsOn allTasks
}