#!/bin/bash
set -euo pipefail

# For each files in tests/queries/*, mount that parquet file, run the query, and compare
# its output.

run_query() {
  file=${1:?must provide testcase file}
  query=${2:?must provide query to run}
  basename=$(basename "$file")
  cat <<EOF
.load parquet/libparquet
.testcase $basename
.bail on
CREATE VIRTUAL TABLE nulls USING parquet('$root/parquet-generator/100-rows-nulls.parquet');
CREATE VIRTUAL TABLE no_nulls1 USING parquet('$root/parquet-generator/100-rows-1.parquet');
CREATE VIRTUAL TABLE no_nulls2 USING parquet('$root/parquet-generator/100-rows-10.parquet');
$query
EOF
}

main() {
  root=$(dirname "${BASH_SOURCE[0]}")/..
  root=$(readlink -f "$root")
  cd "$root"

  find_cmd=(find tests/queries -type f -name '*.sql')
  debug=0
  if [ -n "${1:-""}" ]; then
    find_cmd+=(-regex ".*$1.*")
    debug=1
  fi

  "${find_cmd[@]}" | sort > testcases.txt

  if [ ! -s testcases.txt ]; then
    echo "no matching testcases found"
    exit 1
  fi

  if [ "$(cat testcases.txt | wc -l)" == "1" ]; then
    gdb -ex run --args "$root"/sqlite/sqlite3 -init testcase-cmds.txt
  else
    while read -r file; do
      echo "Testing: $file"
      query=$(head -n1 "$file" | tail -n1)
      tail -n+2 "$file" > testcase-expected.txt

      run_query "$file" "$query" > testcase-cmds.txt
      if ! "$root"/sqlite/sqlite3 -init testcase-cmds.txt < /dev/null > testcase-stdout.txt 2> testcase-stderr.txt; then
        echo "...FAILED; check testcase-{out,err}.txt" >&2
        exit 1
      fi
      diff testcase-out.txt testcase-expected.txt
    done < testcases.txt
  fi
}

main "$@"