#!/bin/bash
set -ex
set -o pipefail
trap "exit" INT TERM
trap "kill 0" EXIT

script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

mkdir db0 ||:

left_pr=$1
left_sha=$2

right_pr=$3
right_sha=$4

function download
{
    rm -r left ||:
    mkdir left ||:
    rm -r right ||:
    mkdir right ||:

    la="$left_pr-$left_sha.tgz"
    ra="$right_pr-$right_sha.tgz"

    # might have the same version on left and right
    if ! [ "$la" = "$ra" ]
    then
        wget -nv -nd -c "https://clickhouse-builds.s3.yandex.net/$left_pr/$left_sha/performance/performance.tgz" -O "$la" && tar -C left --strip-components=1 -zxvf "$la" &
        wget -nv -nd -c "https://clickhouse-builds.s3.yandex.net/$right_pr/$right_sha/performance/performance.tgz" -O "$ra" && tar -C right --strip-components=1 -zxvf "$ra" &
    else
        wget -nv -nd -c "https://clickhouse-builds.s3.yandex.net/$left_pr/$left_sha/performance/performance.tgz" -O "$la" && { tar -C left --strip-components=1 -zxvf "$la" & tar -C right --strip-components=1 -zxvf "$ra" & } &
    fi

    cd db0 && wget -nv -nd -c "https://s3.mds.yandex.net/clickhouse-private-datasets/hits_10m_single/partitions/hits_10m_single.tar" && tar -xvf hits_10m_single.tar &
    cd db0 && wget -nv -nd -c "https://s3.mds.yandex.net/clickhouse-private-datasets/hits_100m_single/partitions/hits_100m_single.tar" && tar -xvf hits_100m_single.tar &
    cd db0 && wget -nv -nd -c "https://clickhouse-datasets.s3.yandex.net/hits/partitions/hits_v1.tar" && tar -xvf hits_v1.tar &
    wait

}
download

function configure
{
    sed -i 's/<tcp_port>9000/<tcp_port>9001/g' left/config/config.xml
    sed -i 's/<tcp_port>9000/<tcp_port>9002/g' right/config/config.xml

    cat > right/config/config.d/zz-perf-test-tweaks.xml <<EOF
    <yandex>
        <logger>
            <console>true</console>
        </logger>
        <text_log remove="remove">
            <table remove="remove"/>
        </text_log>
        <metric_log remove="remove">
            <table remove="remove"/>
        </metric_log>
    </yandex>
EOF

    cp right/config/config.d/zz-perf-test-tweaks.xml left/config/config.d/zz-perf-test-tweaks.xml

    rm left/config/config.d/metric_log.xml ||:
    rm left/config/config.d/text_log.xml ||:
    rm right/config/config.d/metric_log.xml ||:
    rm right/config/config.d/text_log.xml ||:

    # Start a temporary server to rename the tables
    while killall clickhouse ; do echo . ; sleep 1 ; done
    echo all killed

    set -m # Spawn temporary in its own process groups
    left/clickhouse server --config-file=left/config/config.xml -- --path db0 &> setup-log.txt &
    left_pid=$!
    kill -0 $left_pid
    disown $left_pid
    set +m
    while ! left/clickhouse client --port 9001 --query "select 1" ; do kill -0 $left_pid ; echo . ; sleep 1 ; done
    echo server for setup started

    left/clickhouse client --port 9001 --query "create database test" ||:
    left/clickhouse client --port 9001 --query "rename table datasets.hits_v1 to test.hits" ||:
}
configure

function restart
{
    while killall clickhouse ; do echo . ; sleep 1 ; done
    echo all killed

    # Make copies of the original db for both servers. Use hardlinks instead
    # of copying.
    rm -r left/db ||:
    rm -r right/db ||:
    cp -al db0/ left/db/
    cp -al db0/ right/db/

    set -m # Spawn servers in their own process groups

    left/clickhouse server --config-file=left/config/config.xml -- --path left/db &> left/log.txt &
    left_pid=$!
    kill -0 $left_pid
    disown $left_pid

    right/clickhouse server --config-file=right/config/config.xml -- --path right/db &> right/log.txt &
    right_pid=$!
    kill -0 $right_pid
    disown $right_pid

    set +m

    while ! left/clickhouse client --port 9001 --query "select 1" ; do kill -0 $left_pid ; echo . ; sleep 1 ; done
    echo left ok
    while ! right/clickhouse client --port 9002 --query "select 1" ; do kill -0 $right_pid ; echo . ; sleep 1 ; done
    echo right ok

    left/clickhouse client --port 9001 --query "select * from system.tables where database != 'system'"
    right/clickhouse client --port 9002 --query "select * from system.tables where database != 'system'"
}
restart

function run_tests
{
    # Just check that the script runs at all
    "$script_dir/perf.py" --help > /dev/null

    rm -v test-times.tsv ||:

    # FIXME remove some broken long tests
    rm right/performance/{IPv4,IPv6,modulo,parse_engine_file,number_formatting_formats,select_format}.xml ||:

    # Run the tests
    for test in right/performance/${CHPC_TEST_GLOB:-*.xml}
    do
        test_name=$(basename $test ".xml")
        echo test $test_name
        #TIMEFORMAT=$(printf "time\t$test_name\t%%3R\t%%3U\t%%3S\n")
        TIMEFORMAT=$(printf "$test_name\t%%3R\t%%3U\t%%3S\n")
        #time "$script_dir/perf.py" "$test" > >(tee "$test_name-raw.tsv") 2> >(tee "$test_name-err.log") || continue
        { time "$script_dir/perf.py" "$test" > "$test_name-raw.tsv" 2> "$test_name-err.log" ; } 2>> "test-times.tsv" || continue
        grep ^query "$test_name-raw.tsv" | cut -f2- > "$test_name-queries.tsv"
        grep ^client-time "$test_name-raw.tsv" | cut -f2- > "$test_name-client-time.tsv"
        right/clickhouse local --file "$test_name-queries.tsv" --structure 'query text, run int, version UInt32, time float' --query "$(cat $script_dir/eqmed.sql)" > "$test_name-report.tsv"
    done
}
run_tests

# Analyze results
result_structure="left float, right float, diff float, rd Array(float), query text"
right/clickhouse local --file '*-report.tsv' -S "$result_structure" --query "select * from table where abs(diff) < 0.05 and rd[3] > 0.05 order by rd[3] desc" > unstable.tsv
right/clickhouse local --file '*-report.tsv' -S "$result_structure" --query "select * from table where abs(diff) > 0.05 and abs(diff) > rd[3] order by diff desc" > changed-perf.tsv
right/clickhouse local --file '*-client-time.tsv' -S "query text, client float, server float" -q "select client, server, floor(client/server, 3) p, query from table where p > 1.01 order by p desc" > slow-on-client.tsv
grep Exception:[^:] *-err.log > run-errors.log

$script_dir/report.py > report.html