#!/usr/bin/env bash
set -euo pipefail
shopt -s globstar

# A development swiss army knife script. The goals are to:
#
#  - encode some best practices and hard-won knowledge of quirks and corners of
#    our tooling
#  - simplify development; especially for new-comers; instead of writing a huge
#    document describing how to do various dev tasks (or worse yet, not writing
#    one), make it runnable
#
# This makes use of 'cabal.project.dev-sh*' files when building. See
# 'cabal.project.dev-sh.local'.
#
# The configuration for the containers of each backend is stored in
# separate files, see files in 'scripts/containers'

echo_pretty() {
    echo ">>> $(tput setaf 2)$1$(tput sgr0)"
}
echo_error() {
    echo ">>> $(tput setaf 1)$1$(tput sgr0)"
}
echo_warn() {
    echo ">>> $(tput setaf 3)$1$(tput sgr0)"
}

die_usage() {
cat <<EOL
A swiss-army script for local graphql-engine development

Usage:   $0 <COMMAND>

Available COMMANDs:

  graphql-engine
    Launch graphql-engine, connecting to a database launched with
    '$0 postgres'.

  postgres
    Launch a postgres container suitable for use with graphql-engine, watch its
    logs, clean up nicely after

  mssql
    Launch a MSSQL container suitable for use with graphql-engine, watch its
    logs, clean up nicely after

  citus
    Launch a Citus single-node container suitable for use with graphql-engine,
    watch its logs, clean up nicely after

  mysql
    Launch a MySQL container suitable for use with graphql-engine, watch its
    logs, clean up nicely after

  test [--integration [pytest_args...] | --unit | --hlint]
    Run the unit and integration tests, handling spinning up all dependencies.
    This will force a recompile. A combined code coverage report will be
    generated for all test suites.
    Either integration or unit tests can be run individually with their
    respective flags. With '--integration' any arguments that follow will be
    passed to the pytest invocation. Run the hlint code linter individually
    using '--hlint'.

EOL
exit 1
}

# Prettify JSON output, if possible
try_jq() {
  if command -v jq >/dev/null; then
    command jq --unbuffered -R -r '. as $line | try fromjson catch $line'
  else
    cat
  fi
}

# Bump this to:
#  - force a reinstall of python dependencies, etc.
DEVSH_VERSION=1.5

case "${1-}" in
  graphql-engine)
    case "${2-}" in
      --no-rebuild)
      echo_error 'The --no-rebuild option is no longer supported.'
      die_usage
      ;;
      "")
      ;;
      *)
      die_usage
      ;;
    esac
  ;;
  postgres)
  ;;
  mssql)
  ;;
  citus)
  ;;
  mysql)
  ;;
  test)
    case "${2-}" in
      --unit)
      RUN_INTEGRATION_TESTS=false
      RUN_UNIT_TESTS=true
      RUN_HLINT=false
      ;;
      --integration)
      PYTEST_ARGS=( "${@:3}" )
      RUN_INTEGRATION_TESTS=true
      RUN_UNIT_TESTS=false
      RUN_HLINT=false
      source scripts/parse-pytest-backend
      ;;
      --hlint)
      RUN_INTEGRATION_TESTS=false
      RUN_UNIT_TESTS=false
      RUN_HLINT=true
      ;;
      "")
      RUN_INTEGRATION_TESTS=true
      RUN_UNIT_TESTS=true
      RUN_HLINT=true
      BACKEND="postgres"
      ;;
      *)
      die_usage
      ;;
    esac
  ;;
  *)
    die_usage
  ;;
esac

# For now:
MODE="$1"


PROJECT_ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." >/dev/null 2>&1 && pwd )"   # ... https://stackoverflow.com/a/246128/176841
cd "$PROJECT_ROOT"

# Use pyenv if available to set an appropriate python version that will work with pytests etc.
if command -v pyenv >/dev/null; then
  # For now I guess use the greatest python3 >= 3.5
  v=$(pyenv versions --bare | (grep  '^ *3' || true) | awk '{if($1>=3.5)print$1}' | tail -n1)
  if [ -z "$v" ]; then
    echo_error 'Please `pyenv install` a version of python >= 3.5 so we can use it'
    exit 2
  fi
  echo_pretty "Pyenv found. Using python version: $v"
  export PYENV_VERSION=$v
  python3 --version
else
  echo_warn "Pyenv not installed. Proceeding with system python version: $(python3 --version)"
fi


####################################
###       Containers setup       ###
####################################

source scripts/containers/postgres
source scripts/containers/mssql
source scripts/containers/citus
source scripts/containers/mysql.sh
source scripts/data-sources-util.sh

PG_RUNNING=0
MSSQL_RUNNING=0
CITUS_RUNNING=0
MYSQL_RUNNING=0

function cleanup {
  echo

  if [ -n "${GRAPHQL_ENGINE_PID-}" ]; then
    # Kill the cabal new-run and its children. This may already have been killed:
    pkill -P "$GRAPHQL_ENGINE_PID" &>/dev/null || true
  fi

  if [    $PG_RUNNING -eq 1 ]; then    pg_cleanup; fi
  if [ $MSSQL_RUNNING -eq 1 ]; then mssql_cleanup; fi
  if [ $CITUS_RUNNING -eq 1 ]; then citus_cleanup; fi
  if [ $MYSQL_RUNNING -eq 1 ]; then mysql_cleanup; fi

  echo_pretty "Done"
}

trap cleanup EXIT

function pg_start() {
  pg_launch_container
  PG_RUNNING=1
  pg_wait
}

function mssql_start() {
  mssql_launch_container
  MSSQL_RUNNING=1
  mssql_wait
}

function citus_start() {
  citus_launch_container
  CITUS_RUNNING=1
  citus_wait
}

function mysql_start() {
  mysql_launch_container
  MYSQL_RUNNING=1
  mysql_wait
}


function start_dbs() {
  # always launch the postgres container
  pg_start

  case "$BACKEND" in
    citus)
      citus_start
    ;;
    mssql)
      mssql_start
    ;;
    mysql)
      mysql_start
    ;;
    # bigquery deliberately omitted as its test setup is atypical. See:
    # https://github.com/hasura/graphql-engine/blob/master/server/CONTRIBUTING.md#running-the-python-test-suite-on-bigquery
  esac
}


#################################
###     Graphql-engine        ###
#################################

if [ "$MODE" = "graphql-engine" ]; then
  cd "$PROJECT_ROOT"
  # Existing tix files for a different hge binary will cause issues:
  rm -f graphql-engine.tix

  # Attempt to run this after a CTRL-C:
  function cleanup {
    echo
    # Generate coverage, which can be useful for debugging or understanding
    if command -v hpc >/dev/null && command -v jq >/dev/null ; then
      # Get the appropriate mix dir (the newest one). This way this hopefully
      # works when cabal.project.dev-sh.local is edited to turn on optimizations.
      # See also: https://hackage.haskell.org/package/cabal-plan
      distdir=$(cat dist-newstyle/cache/plan.json | jq -r '."install-plan"[] | select(."id" == "graphql-engine-1.0.0-inplace")? | ."dist-dir"')
      hpcdir="$distdir/hpc/dyn/mix/graphql-engine-1.0.0"
      echo_pretty "Generating code coverage report..."
      COVERAGE_DIR="dist-newstyle/dev.sh-coverage"
      hpc_invocation=(hpc markup
        --exclude=Main
        --hpcdir "$hpcdir"
        --reset-hpcdirs graphql-engine.tix
        --fun-entry-count
        --destdir="$COVERAGE_DIR")
      "${hpc_invocation[@]}" >/dev/null

      echo_pretty "To view full coverage report open:"
      echo_pretty "  file://$(pwd)/$COVERAGE_DIR/hpc_index.html"

      tix_archive=dist-newstyle/graphql-engine.tix.$(date "+%Y.%m.%d-%H.%M.%S")
      mv graphql-engine.tix "$tix_archive"
      echo_pretty ""
      echo_pretty "The tix file we used has been archived to: $tix_archive"
      echo_pretty ""
      echo_pretty "You might want to use 'hpc combine' to create a diff of two different tix"
      echo_pretty "files, and then generate a new report with something like:"
      echo_pretty "  $ ${hpc_invocation[*]}"
    else
      echo_warn "Please install 'hpc' and 'jq' to get a code coverage report"
    fi
  }
  trap cleanup EXIT

  export HASURA_GRAPHQL_DATABASE_URL=${HASURA_GRAPHQL_DATABASE_URL-$PG_DB_URL}
  export HASURA_GRAPHQL_SERVER_PORT=${HASURA_GRAPHQL_SERVER_PORT-8181}

  echo_pretty "We will connect to postgres at '$HASURA_GRAPHQL_DATABASE_URL'"
  echo_pretty "If you haven't overridden HASURA_GRAPHQL_DATABASE_URL, you can"
  echo_pretty "launch a fresh postgres container for us to connect to, in a"
  echo_pretty "separate terminal with:"
  echo_pretty "    $ $0 postgres"
  echo_pretty ""

  RUN_INVOCATION=(cabal new-run --project-file=cabal.project.dev-sh --RTS --
    exe:graphql-engine +RTS -N -T -s -RTS serve
    --enable-console --console-assets-dir "$PROJECT_ROOT/console/static/dist"
    )

  echo_pretty 'About to do:'
  echo_pretty '    $ cabal new-build --project-file=cabal.project.dev-sh exe:graphql-engine'
  echo_pretty "    $ ${RUN_INVOCATION[*]}"
  echo_pretty ''

  cabal new-build --project-file=cabal.project.dev-sh exe:graphql-engine

  # We assume a PG is *already running*, and therefore bypass the
  # cleanup mechanism previously set.
  pg_wait

  # Print helpful info after startup logs so it's visible:
  {
    until curl -s "http://127.0.0.1:$HASURA_GRAPHQL_SERVER_PORT/v1/query" &>/dev/null; do
      sleep 0.2
    done
    sleep 1
    echo_pretty "▲▲▲ graphql-engine startup logs above ▲▲▲"
    echo_pretty ""
    echo_pretty "You can set additional environment vars to tailor 'graphql-engine' next time you"
    echo_pretty "invoke this script, e.g.:"
    echo_pretty "    # Keep polling statements out of logs"
    echo_pretty "    HASURA_GRAPHQL_EVENTS_FETCH_INTERVAL=3000000"
    echo_pretty ""
    echo_pretty "The hasura console is available at:"
    echo_pretty "    http://127.0.0.1:$HASURA_GRAPHQL_SERVER_PORT/console"
    echo_pretty ""
    echo_pretty "  If the console was modified since your last build (re)build assets with:"
    echo_pretty "      $ cd \"$PROJECT_ROOT/console\""
    echo_pretty "      $ npm ci && make server-build "
    echo_pretty ""
    echo_pretty "Useful endpoints when compiling with 'graphql-engine:developer' and running with '+RTS -T'"
    echo_pretty "   http://127.0.0.1:$HASURA_GRAPHQL_SERVER_PORT/dev/subscriptions"
    echo_pretty "   http://127.0.0.1:$HASURA_GRAPHQL_SERVER_PORT/dev/plan_cache"
    echo_pretty ""
    echo_pretty "To view realtime GC stats and other info open in your browser:"
    echo_pretty "    file://$PROJECT_ROOT/scripts/ekg/ekg.html#$HASURA_GRAPHQL_SERVER_PORT"
    echo_pretty ""
    echo_pretty "▼▼▼ additional graphql-engine logs will appear below: ▼▼▼"
  } &

  # Logs printed until CTRL-C:
  "${RUN_INVOCATION[@]}" | try_jq
  exit 0
  ### END SCRIPT ###



#################################
###    Postgres container     ###
#################################

elif [ "$MODE" = "postgres" ]; then
  pg_start
  echo_pretty "Postgres logs will start to show up in realtime here. Press CTRL-C to exit and "
  echo_pretty "shutdown this container."
  echo_pretty ""
  echo_pretty "You can use the following to connect to the running instance:"
  echo_pretty "    $ $PG_DOCKER"
  echo_pretty "        or..."
  echo_pretty "    $ PGPASSWORD=$PG_PASSWORD psql -h 127.0.0.1 -p $PG_PORT postgres -U postgres"
  echo_pretty ""
  echo_pretty "Here is the database URL:"
  echo_pretty "    $PG_DB_URL"
  echo_pretty ""
  echo_pretty "If you want to launch a 'graphql-engine' that works with this database:"
  echo_pretty "    $ $0 graphql-engine"
  docker logs -f --tail=0 "$PG_CONTAINER_NAME"


#################################
###      MSSQL Container      ###
#################################

elif [ "$MODE" = "mssql" ]; then
  mssql_start
  echo_pretty "MSSQL logs will start to show up in realtime here. Press CTRL-C to exit and "
  echo_pretty "shutdown this container."
  echo_pretty ""
  echo_pretty "You can use the following to connect to the running instance:"
  echo_pretty "    $ $MSSQL_DOCKER"
  echo_pretty ""
  echo_pretty "If you want to import a SQL file into MSSQL:"
  echo_pretty "    $ $MSSQL_DOCKER -i <import_file>"
  echo_pretty ""
  echo_pretty "Here is the database URL:"
  echo_pretty "    $MSSQL_DB_URL"
  echo_pretty ""
  docker logs -f --tail=0 "$MSSQL_CONTAINER_NAME"


#################################
###      Citus Container      ###
#################################

elif [ "$MODE" = "citus" ]; then
  citus_start
  echo_pretty "CITUS logs will start to show up in realtime here. Press CTRL-C to exit and "
  echo_pretty "shutdown this container."
  echo_pretty ""
  echo_pretty "You can use the following to connect to the running instance:"
  echo_pretty "    $ $CITUS_DOCKER"
  echo_pretty ""
  echo_pretty "Here is the database URL:"
  echo_pretty "    $CITUS_DB_URL"
  echo_pretty ""
  docker logs -f --tail=0 "$CITUS_CONTAINER_NAME"

#################################
###      MySQL Container      ###
#################################

elif [ "$MODE" = "mysql" ]; then
  mysql_start
  echo_pretty "MYSQL logs will start to show up in realtime here. Press CTRL-C to exit and "
  echo_pretty "shutdown this container."
  echo_pretty ""
  echo_pretty "You can use the following to connect to the running instance:"
  echo_pretty "    $ $MYSQL_DOCKER"
  echo_pretty ""
  echo_pretty "If you want to import a SQL file into MYSQL:"
  echo_pretty "    $ $MYSQL_DOCKER -i <import_file>"
  echo_pretty ""
  docker logs -f --tail=0 "$MYSQL_CONTAINER_NAME"


elif [ "$MODE" = "test" ]; then
  ########################################
  ###     Integration / unit tests     ###
  ########################################
  cd "$PROJECT_ROOT"

  # Until we can use a real webserver for TestEventFlood, limit concurrency
  export HASURA_GRAPHQL_EVENTS_HTTP_POOL_SIZE=8

  # We'll get an hpc error if these exist; they will be deleted below too:
  rm -f graphql-engine-tests.tix graphql-engine.tix graphql-engine-combined.tix

  # Various tests take some configuration from the environment; set these up here:
  export EVENT_WEBHOOK_HEADER="MyEnvValue"
  export WEBHOOK_FROM_ENV="http://127.0.0.1:5592"
  export SCHEDULED_TRIGGERS_WEBHOOK_DOMAIN="http://127.0.0.1:5594"
  export REMOTE_SCHEMAS_WEBHOOK_DOMAIN="http://127.0.0.1:5000"

  if [ "$RUN_INTEGRATION_TESTS" = true ]; then
    # It's better UX to build first (possibly failing) before trying to launch
    # PG, but make sure that new-run uses the exact same build plan, else we risk
    # rebuilding twice... ugh
    # Formerly this was a `cabal build` but mixing cabal build and cabal run
    # seems to conflict now, causing re-linking, haddock runs, etc. Instead do a
    # `graphql-engine version` to trigger build
    cabal new-run --project-file=cabal.project.dev-sh -- exe:graphql-engine \
        --metadata-database-url="$PG_DB_URL" version
    start_dbs
  else
    # unit tests just need access to a postgres instance:
    pg_start
  fi

  if [ "$RUN_UNIT_TESTS" = true ]; then
    echo_pretty "Running Haskell test suite"
    HASURA_GRAPHQL_DATABASE_URL="$PG_DB_URL" cabal new-run --project-file=cabal.project.dev-sh -- test:graphql-engine-tests
  fi

  if [ "$RUN_HLINT" = true ]; then
    if command -v hlint >/dev/null; then
      (cd "$PROJECT_ROOT/server" && hlint src-*)
    else
      echo_warn "hlint is not installed: skipping"
    fi
  fi

  if [ "$RUN_INTEGRATION_TESTS" = true ]; then
    GRAPHQL_ENGINE_TEST_LOG=/tmp/hasura-dev-test-engine.log
    echo_pretty "Starting graphql-engine, logging to $GRAPHQL_ENGINE_TEST_LOG"
    export HASURA_GRAPHQL_SERVER_PORT=8088

    # Extra sources for multi-source tests. Uses the default postgres DB if no extra sources
    # are defined.
    export HASURA_GRAPHQL_PG_SOURCE_URL_1=${HASURA_GRAPHQL_PG_SOURCE_URL_1-$PG_DB_URL}
    export HASURA_GRAPHQL_PG_SOURCE_URL_2=${HASURA_GRAPHQL_PG_SOURCE_URL_2-$PG_DB_URL}

    # Using --metadata-database-url flag to test multiple backends
    #       HASURA_GRAPHQL_PG_SOURCE_URL_* For a couple multi-source pytests:
    cabal new-run --project-file=cabal.project.dev-sh -- exe:graphql-engine \
      --metadata-database-url="$PG_DB_URL" serve \
      --stringify-numeric-types \
      --enable-console \
      --console-assets-dir ../console/static/dist \
      &> "$GRAPHQL_ENGINE_TEST_LOG" & GRAPHQL_ENGINE_PID=$!

    echo -n "Waiting for graphql-engine"
    until curl -s "http://127.0.0.1:$HASURA_GRAPHQL_SERVER_PORT/v1/query" &>/dev/null; do
      echo -n '.' && sleep 0.2
      # If the server stopped abort immediately
      if ! kill -0 $GRAPHQL_ENGINE_PID ; then
        echo_error "The server crashed or failed to start!!"
        exit 42
      fi
    done

    echo ""
    echo " Ok"

    add_sources $HASURA_GRAPHQL_SERVER_PORT

    cd "$PROJECT_ROOT/server/tests-py"

    ## Install misc test dependencies:
    if [ ! -d "node_modules" ]; then
      npm_config_loglevel=error npm install remote_schemas/nodejs/
    else
      echo_pretty "It looks like node dependencies have been installed already. Skipping."
      echo_pretty "If things fail please run this and try again"
      echo_pretty "  $ rm -r \"$PROJECT_ROOT/server/tests-py/node_modules\""
    fi

    ### Check for and install dependencies in venv
    PY_VENV=.hasura-dev-python-venv
    DEVSH_VERSION_FILE=.devsh_version
    # Do we need to force reinstall?
    if [ "$DEVSH_VERSION" = "$(cat $DEVSH_VERSION_FILE 2>/dev/null || true)" ]; then
      true # ok
    else
      echo_warn 'dev.sh version was bumped or fresh install. Forcing reinstallation of dependencies.'
      rm -rf "$PY_VENV"
      echo "$DEVSH_VERSION" > "$DEVSH_VERSION_FILE"
    fi
    # cryptography 3.4.7 version requires Rust dependencies by default. But we don't need them for our tests, hence disabling them via the following env var => https://stackoverflow.com/a/66334084
    export CRYPTOGRAPHY_DONT_BUILD_RUST=1
    set +u  # for venv activate
    if [ ! -d "$PY_VENV" ]; then
      python3 -m venv "$PY_VENV"
      source "$PY_VENV/bin/activate"
      pip3 install wheel
      # If the maintainer of this script or pytests needs to change dependencies:
      #  - alter requirements-top-level.txt as needed
      #  - delete requirements.txt
      #  - run this script, then check in the new frozen requirements.txt
      if [ -f requirements.txt ]; then
        pip3 install -r requirements.txt
      else
        pip3 install -r requirements-top-level.txt
        pip3 freeze > requirements.txt
      fi
    else
      echo_pretty "It looks like python dependencies have been installed already. Skipping."
      echo_pretty "If things fail please run this and try again"
      echo_pretty "  $ rm -r \"$PROJECT_ROOT/server/tests-py/$PY_VENV\""

      source "$PY_VENV/bin/activate"
    fi

    # TODO MAYBE: fix deprecation warnings, make them an error
    if ! pytest -W ignore::DeprecationWarning --hge-urls http://127.0.0.1:$HASURA_GRAPHQL_SERVER_PORT --pg-urls "$PG_DB_URL" --durations=20 "${PYTEST_ARGS[@]}"; then
      echo_error "^^^ graphql-engine logs from failed test run can be inspected at: $GRAPHQL_ENGINE_TEST_LOG"
    fi
    deactivate  # python venv
    set -u

    cd "$PROJECT_ROOT/server"
    # Kill the cabal new-run and its children. INT so we get hpc report:
    pkill -INT -P "$GRAPHQL_ENGINE_PID"
    wait "$GRAPHQL_ENGINE_PID" || true
    echo
  fi  # RUN_INTEGRATION_TESTS

  # If hpc available, combine any tix from haskell/unit tests:
  if command -v hpc >/dev/null; then
    if [ "$RUN_UNIT_TESTS" = true ] && [ "$RUN_INTEGRATION_TESTS" = true ]; then
      # As below, it seems we variously get errors related to having two Main
      # modules, so exclude:
      hpc combine --exclude=Main graphql-engine-tests.tix graphql-engine.tix --union > graphql-engine-combined.tix
    else
      # One of these should exist
      cp graphql-engine-tests.tix graphql-engine-combined.tix 2>/dev/null || true
      cp graphql-engine.tix       graphql-engine-combined.tix 2>/dev/null || true
    fi
    # Generate a report including the test code itself (see cabal.project.dev-sh.local):
    # NOTE: we have to omit the .mix directory for the executable, since it
    # seems hpc can't cope with two modules of the same name; '--exclude'
    # didn't help.
    echo_pretty "Generating code coverage report..."
    COVERAGE_DIR="dist-newstyle/dev.sh-coverage"
    hpc markup \
      --exclude=Main \
      --hpcdir dist-newstyle/build/*/ghc-*/graphql-engine-*/noopt/hpc/dyn/mix/graphql-engine-* \
      --hpcdir dist-newstyle/build/*/ghc-*/graphql-engine-*/t/graphql-engine-tests/noopt/hpc/dyn/mix/graphql-engine-tests \
      --reset-hpcdirs graphql-engine-combined.tix \
      --fun-entry-count \
      --destdir="$COVERAGE_DIR" >/dev/null
    hpc report \
      --exclude=Main \
      --hpcdir dist-newstyle/build/*/ghc-*/graphql-engine-*/noopt/hpc/dyn/mix/graphql-engine-* \
      --hpcdir dist-newstyle/build/*/ghc-*/graphql-engine-*/t/graphql-engine-tests/noopt/hpc/dyn/mix/graphql-engine-tests \
      --reset-hpcdirs graphql-engine-combined.tix
    echo_pretty "To view full coverage report open:"
    echo_pretty "  file://$(pwd)/$COVERAGE_DIR/hpc_index.html"

  else
    echo_warn "Please install hpc to get a combined code coverage report for tests"
  fi
  rm -f graphql-engine-tests.tix graphql-engine.tix graphql-engine-combined.tix

else
  echo "impossible; fix script."
fi