#!/bin/bash

# ---

port-used() {
    (cat </dev/null >/dev/tcp/127.0.0.1/$1) 2>/dev/null
}
export -f port-used

# ---

get-port() {
    local port=0
    while
        port=$((10000 + RANDOM % 50000))
        port-used $port
    do continue; done
    echo $port
}
export -f get-port

# ---

fetch-kubeconfig() {(
    set -e -o pipefail
    local num=${1:-1}
    local name=$(cat $TEST_DIR/servers/$num/metadata/name)
    local port=$(cat $TEST_DIR/servers/$num/metadata/port)
    docker cp $name:/etc/rancher/k3s/k3s.yaml - 2>/dev/null | tar -xO 2>/dev/null | sed -e "s/:6443/:$port/g" >$TEST_DIR/servers/$num/kubeconfig.yaml
)}
export -f fetch-kubeconfig

# ---

wait-for-kubeconfig() {
    while ! fetch-kubeconfig $1; do
        echo 'Waiting for kubeconfig to become available...' >&2
        sleep 5
    done
}
export -f wait-for-kubeconfig

# ---

count-ready-nodes() {
    kubectl get nodes -o json \
        | jq '.items[].status.conditions[] | select(.type == "Ready" and .status == "True") | .type' \
        | wc -l \
        | tr -d '[:space:]'
}
export -f count-ready-nodes

# ---

wait-for-nodes() {
    while [[ $(count-ready-nodes) -ne $1 ]]; do
        echo 'Waiting for nodes to be ready...' >&2
        sleep 5
    done
}
export -f wait-for-nodes

# ---

pod-ready() {
    kubectl get pods -n kube-system -o json \
        | jq ".items[].status.containerStatuses[] | select(.name == \"$1\") | .ready" 2>/dev/null
}
export -f pod-ready

# ---

wait-for-services() {
    for service in $@; do
        while [[ "$(pod-ready $service)" != 'true' ]]; do
            echo "Waiting for service $service to be ready..." >&2
            sleep 5
        done
        echo "Service $service is ready"
    done
}
export -f wait-for-services

# ---

wait-for-db-connection() {
    if [ -z "$DB_CONNECTION_TEST" ]; then
      echo 'DB_CONNECTION_TEST is not defined' >&2
      return 1
    fi
    while ! $DB_CONNECTION_TEST 2>/dev/null; do
        echo 'Waiting for database to become available...' >&2
        sleep 5
    done
}
export -f wait-for-db-connection

# ---

verify-valid-version() {
    docker exec $@ 2>&1 | tee .version.tmp
    # check for bad strings in the version output, including '.' in the build metadata
    if grep -oiE '.*(dev|head|unknown|fail|refuse|\+[^"]*\.).*' .version.tmp; then
        return 1
    fi
}
export -f verify-valid-version

# ---

verify-valid-versions() {
    verify-valid-version $1 kubectl version
    verify-valid-version $1 ctr version
    verify-valid-version $1 crictl version
}
export -f verify-valid-versions

# ---

dump-logs() {
    local testID=$(basename $TEST_DIR)
    echo "#---------------------------------"
    echo "#- Begin: logs for run ($testID)"
    echo
    for node in $TEST_DIR/*/*; do
        [ -d "$node" ] || continue
        local name=$(cat $node/metadata/name 2>/dev/null)
        [ "$name" ] || continue
        mkdir -p $node/logs
        docker cp $name:/var/lib/rancher/k3s/agent/containerd/containerd.log $node/logs/containerd.log 2>/dev/null
        docker logs $name >$node/logs/system.log 2>&1
        for log in $node/logs/*.log; do
            echo
            echo "#- Tail: $log"
            tail -5 $log
            echo "#- Done: $log"
            echo
        done
    done
    echo
    echo "#- Finish: logs for run ($testID)"
    echo "#---------------------------------"
    echo
    ./scripts/log-upload $TEST_DIR
}
export -f dump-logs

# ---

retrieve-sonobuoy-logs() {
    sonobuoy status || true

    local status=passed
    local code=0

    if ! sonobuoy status | grep -q -E ' +e2e +complete +passed +'; then
        status=failed
        code=1
    fi

    mkdir -p $TEST_DIR/sonobuoy
    sonobuoy retrieve $TEST_DIR/sonobuoy 2>/dev/null || true
    local logTarball=$TEST_DIR/sonobuoy/*_sonobuoy_*.tar.gz

    if [ -f $logTarball ]; then
        tar -xz -f $logTarball -C $TEST_DIR/sonobuoy
        rm $logTarball
    else
        rm -rf $TEST_DIR/sonobuoy
    fi

    local e2eLog=$TEST_DIR/sonobuoy/plugins/e2e/results/global/e2e.log
    if [ ! -s $e2eLog ]; then
        return 1
    fi
    if [ -n "$LOG_OUTPUT" ]; then
        cp $e2eLog $(sed -e "s/-STATUS-/-$status-/g" <<< "$LOG_OUTPUT")
    fi
    awk '/^Summarizing .* Failures?:$/,0' $e2eLog
    return $code
}
export -f retrieve-sonobuoy-logs

# ---

sonobuoy-test() {
    if [ "$ARCH" = 'arm' ]; then
        echo "Aborting sonobuoy tests, images not available for $ARCH"
        return 0
    fi
    echo 'Starting sonobuoy tests'
    local VERSION_CONFORMANCE=$(sed -e 's/[-+].*$//g' <<< "$VERSION_K8S")

    sonobuoy run \
        --config=scripts/sonobuoy-config.json \
        --plugin-env=e2e.E2E_USE_GO_RUNNER=true \
        --kube-conformance-image-version=${VERSION_CONFORMANCE} \
        --wait=30 \
        $@ &

    local sonobuoyPID=$!
    local code=0
    time wait $sonobuoyPID || code=$?

    retrieve-sonobuoy-logs
    return $code
}
export -f sonobuoy-test

# ---

test-cleanup() {
    local code=$?
    set +e +x
    echo 'Cleaning up...'
    trap - EXIT INT TERM
    if [[ $code -ne 0 ]]; then
        dump-logs
    fi
    for name in $TEST_DIR/*/*/metadata/name; do
        [ -f "$name" ] || continue
        local container=$(cat $name)
        docker rm -f -v $container >/dev/null 2>&1 &
    done
    if [ "$TEST_CLEANUP" = true ]; then
        echo "Removing $TEST_DIR"
        rm -rf $TEST_DIR >/dev/null 2>&1 &
    fi
    [ -f "$PROVISION_LOCK" ] && rm $PROVISION_LOCK >/dev/null 2>&1 &
    echo
    echo -n "Test $(basename $TEST_DIR) "
    if [ $code -eq 0 ]; then
        echo "passed."
    else
        echo "failed."
    fi
    echo
    exit $code
}
export -f test-cleanup

# ---

test-setup() {
    export TEST_DIR=$(mktemp -d '/tmp/XXXXXX')
    trap test-cleanup EXIT INT TERM

    mkdir -p $TEST_DIR/metadata
    if [ "$LABEL" ]; then
        exec > >(awk "{ printf \"[\033[36m${LABEL}\033[m] %s\n\", \$0 }") \
            2> >(awk "{ printf \"[\033[35m${LABEL}\033[m] %s\n\", \$0 }" >&2)
        echo "$LABEL" >$TEST_DIR/metadata/label
    fi

    mkdir -p $TEST_DIR/logs
    exec > >(tee -a $TEST_DIR/logs/test.log) \
        2> >(tee -a $TEST_DIR/logs/test.log >&2)

    if [ -z "$K3S_IMAGE" ]; then
        . ./scripts/version.sh
        TAG=${TAG:-${VERSION_TAG}${SUFFIX}}
        REPO=${REPO:-rancher}
        IMAGE_NAME=${IMAGE_NAME:-k3s}
        export K3S_IMAGE=${REPO}/${IMAGE_NAME}:${TAG}
    fi

    if [ -z "$K3S_IMAGE" ]; then
        echo 'K3S_IMAGE environment variable should be defined'
        return 1
    fi

    local setupFile=./scripts/test-setup-${TEST_TYPE}
    [ -f $setupFile ] && source $setupFile

    echo ${RANDOM}${RANDOM}${RANDOM} >$TEST_DIR/metadata/secret
}
export -f test-setup

# ---

gen-certs() {(
    set -e -x
    #umask 077

    local opensslConfig=$(pwd)/scripts/test-certs-openssl.cnf
    local subject="/C=US/ST=AZ/L=Tempe/O=Rancher/OU=DevOps/DC=com/DC=rancher"
    local caDir=$TEST_DIR/db-ca
    [ -d $caDir ] && rm -rf $caDir
    mkdir -p $caDir

    cd $caDir
    mkdir -p private certs newcerts crl
    touch index.txt
    echo '01' > serial

    openssl req \
        -config $opensslConfig \
        -new -x509 \
        -nodes \
        -subj $subject \
        -extensions v3_ca \
        -keyout private/ca.key \
        -out certs/ca.crt

    openssl req \
        -config $opensslConfig \
        -new \
        -nodes \
        -subj $subject"/CN=server" \
        -keyout private/db.key \
        -out db.csr

    openssl ca \
        -config $opensslConfig \
        -batch \
        -extensions db_server \
        -keyfile private/ca.key \
        -cert certs/ca.crt \
        -out certs/db.crt \
        -infiles db.csr

    openssl req \
        -config $opensslConfig \
        -new \
        -nodes \
        -subj $subject"/CN=client" \
        -keyout private/client.key \
        -out client.csr

    openssl ca \
        -config $opensslConfig \
        -batch \
        -extensions db_client \
        -keyfile private/ca.key \
        -cert certs/ca.crt \
        -out certs/client.crt \
        -infiles client.csr
)}
export -f gen-certs

# ---

inc-count() {(
    shopt -s extglob
    local count=$(exec 2>/dev/null; ls -1d $TEST_DIR/$1/+([0-9]) | xargs -n1 basename | sort -n -r | head -1)
    count=$((count+1))
    mkdir -p $TEST_DIR/$1/$count/metadata
    echo $count
)}
export -f inc-count

# ---

run-function() {
    declare -f $1 >/dev/null 2>&1 || return 0
    $@
}
export -f run-function

# ---

provision-server() {
    local count=$(inc-count servers)
    local testID=$(basename $TEST_DIR)
    local name=$(echo "k3s-server-$count-$testID" | tee $TEST_DIR/servers/$count/metadata/name)
    #local args=$(cat $TEST_DIR/args $TEST_DIR/servers/args $TEST_DIR/servers/$count/args 2>/dev/null)
    local port=$(timeout --foreground 5s bash -c get-port | tee $TEST_DIR/servers/$count/metadata/port)
    local SERVER_INSTANCE_ARGS="SERVER_${count}_ARGS"

    run-function server-pre-hook $count

    docker run \
        -d --name $name \
        --privileged \
        -v $TEST_DIR/db-ca/:/db-ca \
        -p 127.0.0.1:$port:6443 \
        -p 6443 \
        -e K3S_TOKEN=$(cat $TEST_DIR/metadata/secret) \
        -e K3S_DEBUG=true \
        $K3S_IMAGE server $ARGS $SERVER_ARGS ${!SERVER_INSTANCE_ARGS}

    local ip=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' $name | tee $TEST_DIR/servers/$count/metadata/ip)
    local url=$(echo "https://$ip:6443" | tee $TEST_DIR/servers/$count/metadata/url)

    echo "Started $name @ $url"
    run-function server-post-hook $count
}
export -f provision-server

# ---

provision-agent() {
    local K3S_URL=${K3S_URL:-"$(cat $TEST_DIR/servers/1/metadata/url)"}
    local count=$(inc-count agents)
    local testID=$(basename $TEST_DIR)
    local name=$(echo "k3s-agent-$count-$testID" | tee $TEST_DIR/agents/$count/metadata/name)
    #local args=$(cat $TEST_DIR/args $TEST_DIR/agents/args $TEST_DIR/agents/$count/args 2>/dev/null)
    local AGENT_INSTANCE_ARGS="AGENT_${count}_ARGS"

    run-function agent-pre-hook $count
    docker run \
        -d --name $name \
        --privileged \
        -e K3S_TOKEN=$(cat $TEST_DIR/metadata/secret) \
        -e K3S_URL=$K3S_URL \
        $K3S_IMAGE agent $ARGS $AGENT_ARGS ${!AGENT_INSTANCE_ARGS}

    echo "Started $name"
    run-function agent-post-hook $count
}
export -f provision-agent

# ---

provision-cluster() {
    run-function cluster-pre-hook

    for i in $(seq 1 $NUM_SERVERS); do
        provision-server
        timeout --foreground 30s bash -c "wait-for-kubeconfig $i"
    done
    export KUBECONFIG=$TEST_DIR/servers/1/kubeconfig.yaml

    if [ $NUM_AGENTS -gt 0 ]; then
        for _ in $(seq 1 $NUM_AGENTS); do
            provision-agent
        done
    fi

    timeout --foreground 1m bash -c "wait-for-nodes $(( NUM_SERVERS + NUM_AGENTS ))"
    timeout --foreground 3m bash -c "wait-for-services $WAIT_SERVICES"

    run-function cluster-post-hook

    [ -f "$PROVISION_LOCK" ] && rm $PROVISION_LOCK
}
export -f provision-cluster

# ---

run-test() {
    export PROVISION_LOCK=$(mktemp)
    ./scripts/test-runner $@ &
    pids+=($!)
    (
        set +x
        while [ -f "$PROVISION_LOCK" ]; do
            sleep 1
        done
        sleep 5
    )
}
export -f run-test

# ---

e2e-test() {
  local label=$label
  if [ -n "$LABEL_SUFFIX" ]; then
    label="$label-$LABEL_SUFFIX"
  fi
  local logOutput=
  if [ -n "$E2E_OUTPUT" ]; then
    logOutput=$E2E_OUTPUT/$logname
  fi
  LABEL=$label LOG_OUTPUT=$logOutput run-test $@
}

# ---

run-e2e-tests() {
  label=PARALLEL \
      logName=e2e-STATUS-${ARCH}-parallel.log \
      e2e-test ${sonobuoyParallelArgs[@]}

  label=SERIAL \
      logName=e2e-STATUS-${ARCH}-serial.log \
      e2e-test ${sonobuoySerialArgs[@]}
}
export -f run-e2e-tests

# ---

test-run-sonobuoy() {
    local suffix
    if [ "$1" ]; then
        suffix="-$1"
        export LABEL_SUFFIX=$1
    fi

    . ./scripts/test-setup-sonobuoy$suffix
    run-e2e-tests
}
export -f test-run-sonobuoy

# ---

pid-cleanup() {
    local code=$?
    set +e
    local failCount=0
    if [ $code -ne 0 ]; then
        for pid in ${pids[@]}; do
            pkill -P $pid
            wait $pid || failCount=$((failCount+1))
        done
    fi
    wait
    trap - EXIT INT TERM
    set +x
    echo
    if [ $failCount -eq 0 ]; then
        printf '\033[32mAll tests passed.\033[m\n'
        if [ $code -ne 0 ]; then
            printf "\033[31mExit code is $code.\033[m\n"
        fi
    else
        printf "\033[31m$failCount tests failed.\033[m\n"
    fi
    if [ "$DRONE_BUILD_EVENT" = 'tag' ]; then
        code=0
    fi
    echo
    exit $code
}
export -f pid-cleanup

# ---

wait-pids() {
    trap - EXIT
    set +e
    local code=0
    for pid in "${pids[@]}"; do
        wait $pid || code=$?
    done
    pid-cleanup
    if [ "$DRONE_BUILD_EVENT" = 'tag' ]; then
        code=0
    fi
    exit $code
}
export -f wait-pids

# ---

pids=()
trap pid-cleanup INT TERM
trap wait-pids EXIT