#!/usr/bin/env groovy
// -----------------------------------------------------------------------
// Copyright 2021-2023 Open Networking Foundation (ONF) and the ONF Contributors
//
// Licensed 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.
// -----------------------------------------------------------------------
// Install the voltctl command by branch name "voltha-xx"
// -----------------------------------------------------------------------

// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
String getIam(String func) {
    // Cannot rely on a stack trace due to jenkins manipulation
    String src = 'vars/installVoltctl.groovy'
    String iam = [src, func].join('::')
    return iam
}

// -----------------------------------------------------------------------
// Intent: Log progress message
// -----------------------------------------------------------------------
void enter(String name) {
    // Announce ourselves for log usability
    String iam = getIam(name)
    println("${iam}: ENTER")
    return
}

// -----------------------------------------------------------------------
// Intent: Log progress message
// -----------------------------------------------------------------------
void leave(String name) {
    // Announce ourselves for log usability
    String iam = getIam(name)
    println("${iam}: LEAVE")
    return
}

// -----------------------------------------------------------------------
// Intent: Add host entries to /etc/hosts to allow resolving the virtual hosts
// used to expose the voltha api (voltha.voltha.local) and etcd
// (voltha-infra.local) inside of k8s via ingress to localhost
// -----------------------------------------------------------------------
void setHostEntries() {
    enter('setHostEntries')

    sh(
       label  : 'setHostEntries',
       script: """#!/usr/bin/env bash
for hostname in voltha.voltha.local voltha-infra.local; do
  if grep \$hostname /etc/hosts; then
    echo "host entry for \$hostname already exists"
  else
    echo "adding host entry for \$hostname"
    sed -i "s/127.0.0.1 localhost/& \$hostname/" /etc/hosts
  fi
done
""")

    leave('setHostEntries')
    return
}

// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
Boolean process(String branch) {
    Boolean ans = true
    enter('process')

    // This logic seems odd given we branch & tag repositories
    // for release so hilight non-frozen until we know for sure.
    def released = [
        // v1.9.1 - https://github.com/opencord/voltctl/releases/tag/untagged-cd611c39178f25b95a87
        'voltha-2.12' : '1.8.45',
        'voltha-2.11' : '1.8.45',
        // https://github.com/opencord/voltctl/releases/tag/v1.7.6
        'voltha-2.10' : '1.7.6',
        'voltha-2.9'  : '1.7.4',
        'voltha-2.8'  : '1.6.11',
    ]

    boolean have_released = released.containsKey(branch)
    boolean is_release  = false
    // TODO: Enable with parameter: RELEASE_VOLTHA=
    boolean has_binding = binding.hasVariable('WORKSPACE')

    // WIP: Probe to find out what is available
    print("""
** have_released: ${have_released}
**   has_binding: ${has_binding}
""")

    // ---------------------------------------------
    // Sanity check: released version must be frozen
    // ---------------------------------------------
    if (is_release && ! released.containsKey(branch)) {
        // Fingers crossed: jenkins may rewrite the callstack.
        String myname = this.class.getName()

        String url = [
            'https://docs.voltha.org/master',
            'howto/release/installVoltctl.html',
        ].join('/')

        String error = [
            myname, 'ERROR:',
            "Detected release version=[$branch]",
            'but voltctl is not frozen.',
            '',
            'See Also:', url,
        ].join(' ')
        throw new Exception(error) // groovylint-disable-line ThrowException
    }

    // --------------------------------
    // General answer: latest available
    // --------------------------------
    if (! have_released) {
        url = 'https://api.github.com/repos/opencord/voltctl/releases/latest'
        get_version = [
            "curl -sSL ${url}",
            'jq -r .tag_name',
            "sed -e 's/^v//g'",
        ].join(' | ')

        print(" ** RUNNING: ${get_version}")
        released[branch] = sh(
            script: get_version,
            returnStdout: true
        ).trim()
    }

    voltctlVersion = released[branch]
    println "Installing voltctl version ${voltctlVersion} on branch ${branch}"

    // -----------------------------------------------------------------------
    // groovy expansion: ${var}
    // shell  expansion: \${var}
    // -----------------------------------------------------------------------
    sh(
        label : 'Install Voltctl',
        returnStdout: false,
        script: """#!/bin/bash

    # set -eu -o pipefail

    bin_voltctl="$WORKSPACE/bin/voltctl"

    mkdir -p "$WORKSPACE/bin"
    cd "$WORKSPACE" || { echo "ERROR: cd $WORKSPACE failed"; exit 1; }

    HOSTOS="\$(uname -s   | tr '[:upper:]' '[:lower:]')"
    HOSTARCH="\$(uname -m | tr '[:upper:]' '[:lower:]')"
    if [ "\$HOSTARCH" == "x86_64" ]; then
       HOSTARCH="amd64"
    fi

    # Retrieve versioned voltctl binary
    download_url="https://github.com/opencord/voltctl/releases/download"
    vol_ver="v${voltctlVersion}"
    vol_name="voltctl-${voltctlVersion}-\${HOSTOS}-\${HOSTARCH}"
    curl -o "\$bin_voltctl" -sSL "\${download_url}/\${vol_ver}/\${vol_name}"

    chmod u=rwx,go=rx "\$bin_voltctl"

    # ---------------------------------------------------------
    # /usr/local/bin/voltctl --version != bin/voltctl --version
    # Problem when default searchpath has not been modified.
    # ---------------------------------------------------------
    "\${bin_voltctl}" version --clientonly
    voltctl version --clientonly
""")

    leave('process')
    return(ans)
}

// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
def call(String branch) {
    try {
        enter('main')
        setHostEntries()
        process(branch)
    }
    catch (Exception err) {  // groovylint-disable-line CatchException
        String iam = getIam('main')
        println("** ${iam}: EXCEPTION ${err}")
        throw err
    }
    finally {
        leave('main')
    }
    return
}

// [EOF]