/**
 *
 * Remove OSD from existing cluster
 *
 * Requred parameters:
 *  SALT_MASTER_URL             URL of Salt master
 *  SALT_MASTER_CREDENTIALS     Credentials to the Salt API
 *
 *  HOST                        Host (minion id) to be removed
 *  OSD                         Comma separated list of osd ids to be removed
 *  ADMIN_HOST                  Host (minion id) with admin keyring
 *  CLUSTER_FLAGS               Comma separated list of tags to apply to cluster
 *  WAIT_FOR_HEALTHY            Wait for cluster rebalance before stoping daemons
 *
 */

def common = new com.mirantis.mk.Common()
def salt = new com.mirantis.mk.Salt()
def ceph = new com.mirantis.mk.Ceph()
def python = new com.mirantis.mk.Python()

def pepperEnv = "pepperEnv"
def flags = CLUSTER_FLAGS.tokenize(',')
def osds = OSD.tokenize(',')
def cleanDisk = CLEANDISK

timeout(time: 12, unit: 'HOURS') {
    node("python") {

        // create connection to salt master
        python.setupPepperVirtualenv(pepperEnv, SALT_MASTER_URL, SALT_MASTER_CREDENTIALS)

        def osd_ids = []

        def checknode = salt.runSaltProcessStep(pepperEnv, HOST, 'test.ping')
        if (checknode['return'][0].values().isEmpty()) {
            common.errorMsg("Host not found")
            throw new InterruptedException()
        }

        // get list of osd disks of the host
        salt.runSaltProcessStep(pepperEnv, HOST, 'saltutil.sync_grains', [], null, true, 5)
        def cephGrain = salt.getGrain(pepperEnv, HOST, 'ceph')
        def ceph_disks = cephGrain['return'][0].values()[0].values()[0]['ceph_disk']

        if (cephGrain['return'].isEmpty()) {
            throw new Exception("Ceph salt grain cannot be found!")
        }

        if (flags.size() > 0) {
            stage('Set cluster flags') {
                for (flag in flags) {
                    salt.cmdRun(pepperEnv, ADMIN_HOST, 'ceph osd set ' + flag)
                }
            }
        }

        try {
            for (i in ceph_disks) {
                def osd_id = i.getKey().toString()
                if (osd_id in osds || OSD == '*') {
                    osd_ids.add('osd.' + osd_id)
                    print("Will delete " + osd_id)
                } else {
                    print("Skipping " + osd_id)
                }
            }

            if ( osd_ids == [] )
            {
              currentBuild.result = 'SUCCESS'
              return
            }

            // `ceph osd out <id> <id>`
            stage('Set OSDs out') {
                salt.cmdRun(pepperEnv, ADMIN_HOST, 'ceph osd out ' + osd_ids.join(' '))
            }

            // wait for healthy cluster
            if (WAIT_FOR_HEALTHY.toBoolean()) {
                sleep(5)
                ceph.waitForHealthy(pepperEnv, ADMIN_HOST)
            }

            // stop osd daemons
            stage('Stop OSD daemons') {
                for (i in osd_ids) {
                    salt.runSaltProcessStep(pepperEnv, HOST, 'service.stop', ['ceph-osd@' + i.replaceAll('osd.', '')], null, true)
                }
            }

            // `ceph osd crush remove osd.2`
            stage('Remove OSDs from CRUSH') {
                for (i in osd_ids) {
                    salt.cmdRun(pepperEnv, ADMIN_HOST, 'ceph osd crush remove ' + i)
                }
            }

            // remove keyring `ceph auth del osd.3`
            stage('Remove OSD keyrings from auth') {
                for (i in osd_ids) {
                    salt.cmdRun(pepperEnv, ADMIN_HOST, 'ceph auth del ' + i)
                }
            }

            // remove osd `ceph osd rm osd.3`
            stage('Remove OSDs') {
                for (i in osd_ids) {
                    salt.cmdRun(pepperEnv, ADMIN_HOST, 'ceph osd rm ' + i)
                }
            }

            for (osd_id in osd_ids) {
                id = osd_id.replaceAll('osd.', '')

                // remove journal, block_db, block_wal partition `parted /dev/sdj rm 3`
                stage('Remove journal / block_db / block_wal partition') {
                    def partition_uuid = ""
                    def journal_partition_uuid = ""
                    def block_db_partition_uuid = ""
                    def block_wal_partition_uuid = ""
                    try {
                        journal_partition_uuid = salt.cmdRun(pepperEnv, HOST, "cat /var/lib/ceph/osd/ceph-${id}/journal_uuid")['return'][0].values()[0].split("\n")[0]
                    }
                     catch (Exception e) {
                        common.infoMsg(e)
                    }
                    try {
                        block_db_partition_uuid = salt.cmdRun(pepperEnv, HOST, "cat /var/lib/ceph/osd/ceph-${id}/block.db_uuid")['return'][0].values()[0].split("\n")[0]
                    }
                    catch (Exception e) {
                        common.infoMsg(e)
                    }

                    try {
                        block_wal_partition_uuid = salt.cmdRun(pepperEnv, HOST, "cat /var/lib/ceph/osd/ceph-${id}/block.wal_uuid")['return'][0].values()[0].split("\n")[0]
                    }
                    catch (Exception e) {
                        common.infoMsg(e)
                    }

                    // remove partition_uuid = 2c76f144-f412-481e-b150-4046212ca932
                    if (journal_partition_uuid?.trim()) {
                        ceph.removePartition(pepperEnv, HOST, journal_partition_uuid)
                    }
                    if (block_db_partition_uuid?.trim()) {
                        ceph.removePartition(pepperEnv, HOST, block_db_partition_uuid)
                    }
                    if (block_wal_partition_uuid?.trim()) {
                        ceph.removePartition(pepperEnv, HOST, block_wal_partition_uuid)
                    }

                    try {
                        salt.cmdRun(pepperEnv, HOST, "partprobe")
                    }
                    catch (Exception e) {
                        common.warningMsg(e)
                    }
                }
                if (cleanDisk) {
                    // remove data / block / lockbox partition `parted /dev/sdj rm 3`
                    stage('Remove data / block / lockbox partition') {
                        def data_partition_uuid = ""
                        def block_partition_uuid = ""
                        def osd_fsid = ""
                        def lvm = ""
                        def lvm_enabled= salt.getPillar(pepperEnv,"I@ceph:osd","ceph:osd:lvm_enabled")['return'].first().containsValue(true)
                        try {
                            osd_fsid = salt.cmdRun(pepperEnv, HOST, "cat /var/lib/ceph/osd/ceph-${id}/fsid")['return'][0].values()[0].split("\n")[0]
                            if (lvm_enabled) {
                                lvm = salt.runSaltCommand(pepperEnv, 'local', ['expression': HOST, 'type': 'compound'], 'cmd.run', null, "salt-call lvm.lvdisplay --output json -l quiet")['return'][0].values()[0]
                                lvm = new groovy.json.JsonSlurperClassic().parseText(lvm)
                                lvm["local"].each { lv, params ->
                                    if (params["Logical Volume Name"].contains(osd_fsid)) {
                                        data_partition_uuid = params["Logical Volume Name"].minus("/dev/")
                                    }
                                }
                            }
                        }
                        catch (Exception e) {
                            common.infoMsg(e)
                        }
                        try {
                            block_partition_uuid = salt.cmdRun(pepperEnv, HOST, "cat /var/lib/ceph/osd/ceph-${id}/block_uuid")['return'][0].values()[0].split("\n")[0]
                        }
                        catch (Exception e) {
                            common.infoMsg(e)
                        }

                        // remove partition_uuid = 2c76f144-f412-481e-b150-4046212ca932
                        if (block_partition_uuid?.trim()) {
                            ceph.removePartition(pepperEnv, HOST, block_partition_uuid)
                            try{
                                salt.cmdRun(pepperEnv, HOST, "ceph-volume lvm zap `readlink /var/lib/ceph/osd/ceph-${id}/block` --destroy")
                            }
                            catch (Exception e) {
                                common.infoMsg(e)
                            }
                        }
                        if (data_partition_uuid?.trim()) {
                            ceph.removePartition(pepperEnv, HOST, data_partition_uuid, 'data', id)
                        }
                    }
                }
            }
        }
        finally {
            // remove cluster flags
            if (flags.size() > 0) {
                stage('Unset cluster flags') {
                    for (flag in flags) {
                        common.infoMsg('Removing flag ' + flag)
                        salt.cmdRun(pepperEnv, ADMIN_HOST, 'ceph osd unset ' + flag)
                    }
                }
            }
        }
    }
}