generate_tests

#!/usr/bin/env bash

# Exit if anything fails.
set -euo pipefail

# see comment in generator-utils/utils.sh
# shellcheck source=bin/generator-utils/utils.sh
# shellcheck source=./generator-utils/utils.sh
source ./bin/generator-utils/utils.sh

if [ ! -e bin/generator-utils/escape_double_quotes ]; then
  message "info" "Building util function"
  cd util/escape_double_quotes && ./build && cd ../..
fi

digest_template() {
  local template
  template=$(bin/generator-utils/escape_double_quotes bin/test_template)
  # Turn every token into a jq command

  echo "$template" | sed 's/${\([^}]*\)\}\$/$(echo $case | jq -r '\''.\1'\'')/g'
}

message "info" "Generating tests.."
canonical_json=$(cat canonical_data.json)

slug=$(echo "$canonical_json" | jq '.exercise')
# Remove double quotes
slug=$(echo "$slug" | sed 's/"//g')
exercise_dir="exercises/practice/$slug"
test_file="$exercise_dir/tests/$slug.rs"

cat <<EOT >"$test_file"
use $(dash_to_underscore "$slug")::*;

EOT

# Flattens canonical json, extracts only the objects with a uuid
cases=$(echo "$canonical_json" | jq '[ .. | objects | with_entries(select(.key | IN("uuid", "description", "input", "expected", "property"))) | select(. != {}) | select(has("uuid")) ]')

# Shellcheck doesn't recognize that `case` is not unused

# shellcheck disable=SC2034
jq -c '.[]' <<<"$cases" | while read -r case; do

  # Evaluate the bash parts and replace them with their return values
  eval_template="$(digest_template | sed -e "s/\$(\(.*\))/\$\(\1\)/g")"
  eval_template="$(eval "echo \"$eval_template\"")"

  # Turn function name into snake_case
  formatted_template=$(echo "$eval_template" | sed -E -e '/^fn/!b' -e 's/[^a-zA-Z0-9_{}()[:space:]-]//g' -e 's/([[:upper:]])/ \L\1/g' -e 's/(fn[[:space:]]+)([a-z0-9_-]+)/\1\L\2/g' -e 's/ /_/g' -e 's/_\{/\{/g' -e 's/-/_/g' | sed 's/fn_/fn /' | sed 's/__\+/_/g')

  # Push to test file
  echo "$formatted_template" >>"$test_file"
  printf "\\n" >>"$test_file"

done

rustfmt "$test_file"

message "success" "Generated tests successfully! Check out ${test_file}"