/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package runtime.actionContainers

import java.io.File
import java.util.Base64

import org.apache.commons.io.FileUtils
import org.junit.runner.RunWith
import org.scalatest.junit.JUnitRunner

import actionContainers.{ActionContainer, BasicActionRunnerTests}
import actionContainers.ActionContainer.withContainer
import common.TestUtils
import common.WskActorSystem
import spray.json._

object CodeSamples {
  val codeNotReturningJson = """
                               |#!/bin/sh
                               |echo not a json object
                             """.stripMargin.trim

  /** Standard code samples, should print 'hello' to stdout and echo the input args. */
  val stdCodeSamples = {
    val bash = """
                 |#!/bin/bash
                 |echo 'hello stdout'
                 |echo 'hello stderr' 1>&2
                 |if [[ -z $1 || $1 == '{}' ]]; then
                 |   echo '{ "msg": "Hello from bash script!" }'
                 |else
                 |   echo $1 # echo the arguments back as the result
                 |fi
               """.stripMargin.trim

    val python = """
                   |#!/usr/bin/env python
                   |from __future__ import print_function
                   |import sys
                   |print('hello stdout')
                   |print('hello stderr', file=sys.stderr)
                   |print(sys.argv[1])
                 """.stripMargin.trim

    val perl = """
                 |#!/usr/bin/env perl
                 |print STDOUT "hello stdout\n";
                 |print STDERR "hello stderr\n";
                 |print $ARGV[0];
               """.stripMargin.trim

    Seq(("bash", bash), ("python", python), ("perl", perl))
  }

  val stdUnicodeSamples = {
    // python 3 in base image
    val python = """
                   |#!/usr/bin/env python
                   |import json, sys
                   |j = json.loads(sys.argv[1])
                   |sep = j["delimiter"]
                   |s = sep + " ☃ " + sep
                   |print(s)
                   |print(json.dumps({"winter": s}))
                 """.stripMargin.trim

    Seq(("python", python))
  }

  /** Standard code samples, should print 'hello' to stdout and echo the input args. */
  val stdEnvSamples = {
    val bash = """
                 |#!/bin/bash
                 |echo "{ \
                 |\"api_host\": \"$__OW_API_HOST\", \"api_key\": \"$__OW_API_KEY\", \
                 |\"namespace\": \"$__OW_NAMESPACE\", \"action_name\": \"$__OW_ACTION_NAME\", \
                 |\"activation_id\": \"$__OW_ACTIVATION_ID\", \"deadline\": \"$__OW_DEADLINE\" }"
               """.stripMargin.trim

    val python =
      """
        |#!/usr/bin/env python
        |import os
        |
        |print('{ "api_host": "%s", "api_key": "%s", "namespace": "%s", "action_name" : "%s", "activation_id": "%s", "deadline": "%s" }' % (
        |  os.environ['__OW_API_HOST'], os.environ['__OW_API_KEY'],
        |  os.environ['__OW_NAMESPACE'], os.environ['__OW_ACTION_NAME'],
        |  os.environ['__OW_ACTIVATION_ID'], os.environ['__OW_DEADLINE']))
      """.stripMargin.trim

    val perl =
      """
        |#!/usr/bin/env perl
        |$a = $ENV{'__OW_API_HOST'};
        |$b = $ENV{'__OW_API_KEY'};
        |$c = $ENV{'__OW_NAMESPACE'};
        |$d = $ENV{'__OW_ACTION_NAME'};
        |$e = $ENV{'__OW_ACTIVATION_ID'};
        |$f = $ENV{'__OW_DEADLINE'};
        |print "{ \"api_host\": \"$a\", \"api_key\": \"$b\", \"namespace\": \"$c\", \"action_name\": \"$d\", \"activation_id\": \"$e\", \"deadline\": \"$f\" }";
      """.stripMargin.trim

    Seq(("bash", bash), ("python", python), ("perl", perl))
  }

  /** Large param samples, echo the input args with input larger than 128K and using STDIN */
  val stdLargeInputSamples = {
    val bash = """
                 |#!/bin/bash
                 |  read inputstring
                 |  echo $inputstring
               """.stripMargin.trim

    val python = """
                   |#!/usr/bin/env python
                   |import sys, json
                   |params = sys.stdin.readline()
                   |j = json.loads(params)
                   |print(json.dumps(j))
                 """.stripMargin.trim

    val perl = """
                 |#!/usr/bin/env perl
                 |$params=<STDIN>;
                 |print $params;
               """.stripMargin.trim

    Seq(("bash", bash), ("python", python), ("perl", perl))
  }
}

@RunWith(classOf[JUnitRunner])
class ActionProxyContainerTests extends BasicActionRunnerTests with WskActorSystem {

  override def withActionContainer(env: Map[String, String] = Map.empty)(code: ActionContainer => Unit) = {
    withContainer("dockerskeleton", env)(code)
  }

  override val testNoSourceOrExec = TestConfig("", hasCodeStub = true)
  override val testNotReturningJson = TestConfig(CodeSamples.codeNotReturningJson, enforceEmptyOutputStream = false)
  override val testInitCannotBeCalledMoreThanOnce = TestConfig(CodeSamples.codeNotReturningJson)
  // the skeleton requires the executable to be called /action/exec, this test will pass with any "main"
  override val testEntryPointOtherThanMain =
    TestConfig(CodeSamples.stdLargeInputSamples(0)._2, main = "exec", false, true)
  override val testEcho = TestConfig(CodeSamples.stdCodeSamples(0)._2)
  override val testUnicode = TestConfig(CodeSamples.stdUnicodeSamples(0)._2)
  override val testEnv = TestConfig(CodeSamples.stdEnvSamples(0)._2)
  override val testLargeInput = TestConfig(CodeSamples.stdLargeInputSamples(0)._2)

  behavior of "openwhisk/dockerskeleton"

  it should "run sample without init" in {
    val (out, err) = withActionContainer() { c =>
      val (runCode, out) = c.run(JsObject())
      runCode should be(200)
      out should be(Some(JsObject("error" -> JsString("This is a stub action. Replace it with custom logic."))))
    }

    checkStreams(out, err, {
      case (o, _) => o should include("This is a stub action")
    })
  }

  it should "run sample with 'null' init" in {
    val (out, err) = withActionContainer() { c =>
      val (initCode, _) = c.init(initPayload(null))
      initCode should be(200)

      val (runCode, out) = c.run(JsObject())
      runCode should be(200)
      out should be(Some(JsObject("error" -> JsString("This is a stub action. Replace it with custom logic."))))
    }

    checkStreams(out, err, {
      case (o, _) => o should include("This is a stub action")
    })
  }

  it should "run sample with init that does nothing" in {
    val (out, err) = withActionContainer() { c =>
      val (initCode, _) = c.init(JsObject())
      initCode should be(200)
      val (runCode, out) = c.run(JsObject())
      runCode should be(200)
      out should be(Some(JsObject("error" -> JsString("This is a stub action. Replace it with custom logic."))))
    }

    checkStreams(out, err, {
      case (o, _) => o should include("This is a stub action")
    })
  }

  it should "respond with 404 for bad run argument" in {
    val (out, err) = withActionContainer() { c =>
      val (runCode, out) = c.run(runPayload(JsString("A")))
      runCode should be(404)
    }

    checkStreams(out, err, {
      case (o, e) =>
        o shouldBe empty
        e shouldBe empty
    })
  }

  it should "fail to run a bad script" in {
    val (out, err) = withActionContainer() { c =>
      val (initCode, _) = c.init(initPayload(""))
      initCode should be(200)
      val (runCode, out) = c.run(JsNull)
      runCode should be(502)
      out should be(Some(JsObject("error" -> JsString("The action did not return a dictionary."))))
    }

    checkStreams(out, err, {
      case (o, _) => o should include("error")
    })
  }

  it should "extract and run a compatible zip exec" in {
    val zip = FileUtils.readFileToByteArray(new File(TestUtils.getTestActionFilename("blackbox.zip")))
    val contents = Base64.getEncoder.encodeToString(zip)

    val (out, err) = withActionContainer() { c =>
      val (initCode, err) =
        c.init(JsObject("value" -> JsObject("code" -> JsString(contents), "binary" -> JsBoolean(true))))
      initCode should be(200)
      val (runCode, out) = c.run(JsObject())
      runCode should be(200)
      out.get should be(JsObject("msg" -> JsString("hello zip")))
    }

    checkStreams(out, err, {
      case (o, e) =>
        o shouldBe "This is an example zip used with the docker skeleton action."
        e shouldBe empty
    })
  }
}