#!/bin/bash
set -xeu
set -o pipefail
trap "exit" INT TERM
trap 'kill $(jobs -pr) ||:' EXIT

# This script is separated into two stages, cloning and everything else, so
# that we can run the "everything else" stage from the cloned source.
stage=${stage:-}

# A variable to pass additional flags to CMake.
# Here we explicitly default it to nothing so that bash doesn't complain about
# it being undefined. Also read it as array so that we can pass an empty list
# of additional variable to cmake properly, and it doesn't generate an extra
# empty parameter.
read -ra FASTTEST_CMAKE_FLAGS <<< "${FASTTEST_CMAKE_FLAGS:-}"

# Run only matching tests.
FASTTEST_FOCUS=${FASTTEST_FOCUS:-""}

FASTTEST_WORKSPACE=$(readlink -f "${FASTTEST_WORKSPACE:-.}")
FASTTEST_SOURCE=$(readlink -f "${FASTTEST_SOURCE:-$FASTTEST_WORKSPACE/ch}")
FASTTEST_BUILD=$(readlink -f "${FASTTEST_BUILD:-${BUILD:-$FASTTEST_WORKSPACE/build}}")
FASTTEST_DATA=$(readlink -f "${FASTTEST_DATA:-$FASTTEST_WORKSPACE/db-fasttest}")
FASTTEST_OUTPUT=$(readlink -f "${FASTTEST_OUTPUT:-$FASTTEST_WORKSPACE}")
PATH="$FASTTEST_BUILD/programs:$FASTTEST_SOURCE/tests:$PATH"

# Export these variables, so that all subsequent invocations of the script
# use them, and not try to guess them anew, which leads to weird effects.
export FASTTEST_WORKSPACE
export FASTTEST_SOURCE
export FASTTEST_BUILD
export FASTTEST_DATA
export FASTTEST_OUT
export PATH

server_pid=none

function stop_server
{
    if ! kill -0 -- "$server_pid"
    then
        echo "ClickHouse server pid '$server_pid' is not running"
        return 0
    fi

    for _ in {1..60}
    do
        if ! pkill -f "clickhouse-server" && ! kill -- "$server_pid" ; then break ; fi
        sleep 1
    done

    if kill -0 -- "$server_pid"
    then
        pstree -apgT
        jobs
        echo "Failed to kill the ClickHouse server pid '$server_pid'"
        return 1
    fi

    server_pid=none
}

function start_server
{
    set -m # Spawn server in its own process groups
    local opts=(
        --config-file "$FASTTEST_DATA/config.xml"
        --
        --path "$FASTTEST_DATA"
        --user_files_path "$FASTTEST_DATA/user_files"
        --top_level_domains_path "$FASTTEST_DATA/top_level_domains"
        --test_keeper_server.log_storage_path "$FASTTEST_DATA/coordination"
    )
    clickhouse-server "${opts[@]}" &>> "$FASTTEST_OUTPUT/server.log" &
    server_pid=$!
    set +m

    if [ "$server_pid" == "0" ]
    then
        echo "Failed to start ClickHouse server"
        # Avoid zero PID because `kill` treats it as our process group PID.
        server_pid="none"
        return 1
    fi

    for _ in {1..60}
    do
        if clickhouse-client --query "select 1" || ! kill -0 -- "$server_pid"
        then
            break
        fi
        sleep 1
    done

    if ! clickhouse-client --query "select 1"
    then
        echo "Failed to wait until ClickHouse server starts."
        server_pid="none"
        return 1
    fi

    if ! kill -0 -- "$server_pid"
    then
        echo "Wrong clickhouse server started: PID '$server_pid' we started is not running, but '$(pgrep -f clickhouse-server)' is running"
        server_pid="none"
        return 1
    fi

    echo "ClickHouse server pid '$server_pid' started and responded"

    echo "
handle all noprint
handle SIGSEGV stop print
handle SIGBUS stop print
handle SIGABRT stop print
continue
thread apply all backtrace
continue
" > script.gdb

    gdb -batch -command script.gdb -p "$server_pid" &
}

function clone_root
{
    git clone https://github.com/ClickHouse/ClickHouse.git -- "$FASTTEST_SOURCE" | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/clone_log.txt"

    (
        cd "$FASTTEST_SOURCE"
        if [ "$PULL_REQUEST_NUMBER" != "0" ]; then
            if git fetch origin "+refs/pull/$PULL_REQUEST_NUMBER/merge"; then
                git checkout FETCH_HEAD
                echo 'Clonned merge head'
            else
                git fetch origin "+refs/pull/$PULL_REQUEST_NUMBER/head"
                git checkout "$COMMIT_SHA"
                echo 'Checked out to commit'
            fi
        else
            if [ -v COMMIT_SHA ]; then
                git checkout "$COMMIT_SHA"
            fi
        fi
    )
}

function clone_submodules
{
    (
        cd "$FASTTEST_SOURCE"

        SUBMODULES_TO_UPDATE=(
            contrib/abseil-cpp
            contrib/antlr4-runtime
            contrib/boost
            contrib/zlib-ng
            contrib/libxml2
            contrib/poco
            contrib/libunwind
            contrib/fmtlib
            contrib/base64
            contrib/cctz
            contrib/libcpuid
            contrib/double-conversion
            contrib/libcxx
            contrib/libcxxabi
            contrib/libc-headers
            contrib/lz4
            contrib/zstd
            contrib/fastops
            contrib/rapidjson
            contrib/re2
            contrib/sparsehash-c11
            contrib/croaring
            contrib/miniselect
            contrib/xz
            contrib/dragonbox
            contrib/fast_float
            contrib/NuRaft
        )

        git submodule sync
        git submodule update --init --recursive "${SUBMODULES_TO_UPDATE[@]}"
        git submodule foreach git reset --hard
        git submodule foreach git checkout @ -f
        git submodule foreach git clean -xfd
    )
}

function run_cmake
{
    CMAKE_LIBS_CONFIG=(
        "-DENABLE_LIBRARIES=0"
        "-DENABLE_TESTS=0"
        "-DENABLE_UTILS=0"
        "-DENABLE_EMBEDDED_COMPILER=0"
        "-DENABLE_THINLTO=0"
        "-DUSE_UNWIND=1"
        "-DENABLE_NURAFT=1"
    )

    # TODO remove this? we don't use ccache anyway. An option would be to download it
    # from S3 simultaneously with cloning.
    export CCACHE_DIR="$FASTTEST_WORKSPACE/ccache"
    export CCACHE_BASEDIR="$FASTTEST_SOURCE"
    export CCACHE_NOHASHDIR=true
    export CCACHE_COMPILERCHECK=content
    export CCACHE_MAXSIZE=15G

    ccache --show-stats ||:
    ccache --zero-stats ||:

    mkdir "$FASTTEST_BUILD" ||:

    (
        cd "$FASTTEST_BUILD"
        cmake "$FASTTEST_SOURCE" -DCMAKE_CXX_COMPILER=clang++-10 -DCMAKE_C_COMPILER=clang-10 "${CMAKE_LIBS_CONFIG[@]}" "${FASTTEST_CMAKE_FLAGS[@]}" | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/cmake_log.txt"
    )
}

function build
{
    (
        cd "$FASTTEST_BUILD"
        time ninja clickhouse-bundle | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/build_log.txt"
        if [ "$COPY_CLICKHOUSE_BINARY_TO_OUTPUT" -eq "1" ]; then
            cp programs/clickhouse "$FASTTEST_OUTPUT/clickhouse"
        fi
        ccache --show-stats ||:
    )
}

function configure
{
    clickhouse-client --version
    clickhouse-test --help

    mkdir -p "$FASTTEST_DATA"{,/client-config}
    cp -a "$FASTTEST_SOURCE/programs/server/"{config,users}.xml "$FASTTEST_DATA"
    "$FASTTEST_SOURCE/tests/config/install.sh" "$FASTTEST_DATA" "$FASTTEST_DATA/client-config"
    cp -a "$FASTTEST_SOURCE/programs/server/config.d/log_to_console.xml" "$FASTTEST_DATA/config.d"
    # doesn't support SSL
    rm -f "$FASTTEST_DATA/config.d/secure_ports.xml"
}

function run_tests
{
    clickhouse-server --version
    clickhouse-test --help

    # Kill the server in case we are running locally and not in docker
    stop_server ||:

    start_server

    TESTS_TO_SKIP=(
        00105_shard_collations
        00109_shard_totals_after_having
        00110_external_sort
        00302_http_compression
        00417_kill_query
        00436_convert_charset
        00490_special_line_separators_and_characters_outside_of_bmp
        00652_replicated_mutations_zookeeper
        00682_empty_parts_merge
        00701_rollup
        00834_cancel_http_readonly_queries_on_client_close
        00911_tautological_compare

        # Hyperscan
        00926_multimatch
        00929_multi_match_edit_distance
        01681_hyperscan_debug_assertion

        01176_mysql_client_interactive          # requires mysql client
        01031_mutations_interpreter_and_context
        01053_ssd_dictionary # this test mistakenly requires acces to /var/lib/clickhouse -- can't run this locally, disabled
        01083_expressions_in_engine_arguments
        01092_memory_profiler
        01098_msgpack_format
        01098_temporary_and_external_tables
        01103_check_cpu_instructions_at_startup # avoid dependency on qemu -- invonvenient when running locally
        01193_metadata_loading
        01238_http_memory_tracking              # max_memory_usage_for_user can interfere another queries running concurrently
        01251_dict_is_in_infinite_loop
        01259_dictionary_custom_settings_ddl
        01268_dictionary_direct_layout
        01280_ssd_complex_key_dictionary
        01281_group_by_limit_memory_tracking    # max_memory_usage_for_user can interfere another queries running concurrently
        01318_encrypt                           # Depends on OpenSSL
        01318_decrypt                           # Depends on OpenSSL
        01663_aes_msan                          # Depends on OpenSSL
        01667_aes_args_check                    # Depends on OpenSSL
        01281_unsucceeded_insert_select_queries_counter
        01292_create_user
        01294_lazy_database_concurrent
        01305_replica_create_drop_zookeeper
        01354_order_by_tuple_collate_const
        01355_ilike
        01411_bayesian_ab_testing
        01532_collate_in_low_cardinality
        01533_collate_in_nullable
        01542_collate_in_array
        01543_collate_in_tuple
        _orc_
        arrow
        avro
        base64
        brotli
        capnproto
        client
        ddl_dictionaries
        h3
        hashing
        hdfs
        java_hash
        json
        limit_memory
        live_view
        memory_leak
        memory_limit
        mysql
        odbc
        parallel_alter
        parquet
        protobuf
        secure
        sha256
        xz

        # Not sure why these two fail even in sequential mode. Disabled for now
        # to make some progress.
        00646_url_engine
        00974_query_profiler

         # In fasttest, ENABLE_LIBRARIES=0, so rocksdb engine is not enabled by default
        01504_rocksdb
        01686_rocksdb

        # Look at DistributedFilesToInsert, so cannot run in parallel.
        01460_DistributedFilesToInsert

        01541_max_memory_usage_for_user_long

        # Require python libraries like scipy, pandas and numpy
        01322_ttest_scipy
        01561_mann_whitney_scipy

        01545_system_errors
        # Checks system.errors
        01563_distributed_query_finish

        # nc - command not found
        01601_proxy_protocol
        01622_defaults_for_url_engine

        # JSON functions
        01666_blns
    )

    (time clickhouse-test --hung-check -j 8 --order=random --use-skip-list --no-long --testname --shard --zookeeper --skip "${TESTS_TO_SKIP[@]}" -- "$FASTTEST_FOCUS" 2>&1 ||:) | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/test_log.txt"

    # substr is to remove semicolon after test name
    readarray -t FAILED_TESTS < <(awk '/\[ FAIL|TIMEOUT|ERROR \]/ { print substr($3, 1, length($3)-1) }' "$FASTTEST_OUTPUT/test_log.txt" | tee "$FASTTEST_OUTPUT/failed-parallel-tests.txt")

    # We will rerun sequentially any tests that have failed during parallel run.
    # They might have failed because there was some interference from other tests
    # running concurrently. If they fail even in seqential mode, we will report them.
    # FIXME All tests that require exclusive access to the server must be
    # explicitly marked as `sequential`, and `clickhouse-test` must detect them and
    # run them in a separate group after all other tests. This is faster and also
    # explicit instead of guessing.
    if [[ -n "${FAILED_TESTS[*]}" ]]
    then
        stop_server ||:

        # Clean the data so that there is no interference from the previous test run.
        rm -rf "$FASTTEST_DATA"/{{meta,}data,user_files,coordination} ||:

        start_server

        echo "Going to run again: ${FAILED_TESTS[*]}"

        clickhouse-test --hung-check --order=random --no-long --testname --shard --zookeeper "${FAILED_TESTS[@]}" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee -a "$FASTTEST_OUTPUT/test_log.txt"
    else
        echo "No failed tests"
    fi
}

case "$stage" in
"")
    ls -la
    ;&
"clone_root")
    clone_root

    # Pass control to the script from cloned sources, unless asked otherwise.
    if ! [ -v FASTTEST_LOCAL_SCRIPT ]
    then
        # 'run' stage is deprecated, used for compatibility with old scripts.
        # Replace with 'clone_submodules' after Nov 1, 2020.
        # cd and CLICKHOUSE_DIR are also a setup for old scripts, remove as well.
        # In modern script we undo it by changing back into workspace dir right
        # away, see below. Remove that as well.
        cd "$FASTTEST_SOURCE"
        CLICKHOUSE_DIR=$(pwd)
        export CLICKHOUSE_DIR
        stage=run "$FASTTEST_SOURCE/docker/test/fasttest/run.sh"
        exit $?
    fi
    ;&
"run")
    # A deprecated stage that is called by old script and equivalent to everything
    # after cloning root, starting with cloning submodules.
    ;&
"clone_submodules")
    # Recover after being called from the old script that changes into source directory.
    # See the compatibility hacks in `clone_root` stage above. Remove at the same time,
    # after Nov 1, 2020.
    cd "$FASTTEST_WORKSPACE"
    clone_submodules | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/submodule_log.txt"
    ;&
"run_cmake")
    run_cmake
    ;&
"build")
    build
    ;&
"configure")
    # The `install_log.txt` is also needed for compatibility with old CI task --
    # if there is no log, it will decide that build failed.
    configure | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/install_log.txt"
    ;&
"run_tests")
    run_tests
    ;;
*)
    echo "Unknown test stage '$stage'"
    exit 1
esac

pstree -apgT
jobs