#!/usr/bin/env bash
set -euo pipefail

usage() {
  printf '%s\n' \
    'usage:' \
    '  finalize-task-policy.sh pair <build-base-lane> <true|false> <build-scope> <build-state> <build-blast> <build-evidence> <build-verification> <review-base-lane> <review-scope> <review-state> <review-blast> <review-evidence> <review-verification>' \
    '  finalize-task-policy.sh build <base-lane> <true|false> <scope> <state> <blast> <evidence> <verification>' \
    '  finalize-task-policy.sh review <base-lane> <scope> <state> <blast> <evidence> <verification>' >&2
  exit 2
}

script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
formatter="$script_dir/finalize-task-route.sh"

field() {
  local output=$1
  local key=$2
  local value
  value=$(sed -n "s/^${key}=//p" <<<"$output")
  if [[ -z "$value" ]]; then
    printf 'missing formatter field: %s\n' "$key" >&2
    exit 3
  fi
  printf '%s\n' "$value"
}

finalize_build() {
  local base_lane=$1
  local risk_triggered=$2
  shift 2
  local scores=("$@")
  local base
  local final

  case "$risk_triggered" in
    true|false)
      ;;
    *)
      usage
      ;;
  esac

  base=$("$formatter" build "$base_lane" "${scores[@]}")
  BUILD_BASE_LANE=$(field "$base" lane)
  BUILD_BASE_GRADE=$(field "$base" grade)
  BUILD_RISK_TRIGGERED=$risk_triggered

  if [[ "$risk_triggered" == true ]]; then
    BUILD_FLOOR=G07
    final=$("$formatter" build cloud "${scores[@]}" 7)
  else
    BUILD_FLOOR=none
    final=$base
  fi

  BUILD_LANE=$(field "$final" lane)
  BUILD_GRADE=$(field "$final" grade)
  BUILD_FILENAME=$(field "$final" filename)
}

finalize_review() {
  local base_lane=$1
  local floor_number=$2
  shift 2
  local scores=("$@")
  local base
  local final

  base=$("$formatter" review "$base_lane" "${scores[@]}")
  REVIEW_BASE_LANE=$(field "$base" lane)
  REVIEW_BASE_GRADE=$(field "$base" grade)
  REVIEW_FLOOR=$(printf 'G%02d' "$floor_number")
  final=$("$formatter" review cloud "${scores[@]}" "$floor_number")
  REVIEW_LANE=$(field "$final" lane)
  REVIEW_GRADE=$(field "$final" grade)
  REVIEW_FILENAME=$(field "$final" filename)
}

emit_build() {
  printf 'build_base_lane=%s\n' "$BUILD_BASE_LANE"
  printf 'build_base_grade=%s\n' "$BUILD_BASE_GRADE"
  printf 'build_risk_triggered=%s\n' "$BUILD_RISK_TRIGGERED"
  printf 'build_floor=%s\n' "$BUILD_FLOOR"
  printf 'build_lane=%s\n' "$BUILD_LANE"
  printf 'build_grade=%s\n' "$BUILD_GRADE"
  printf 'build_filename=%s\n' "$BUILD_FILENAME"
}

emit_review() {
  printf 'review_base_lane=%s\n' "$REVIEW_BASE_LANE"
  printf 'review_base_grade=%s\n' "$REVIEW_BASE_GRADE"
  printf 'review_floor=%s\n' "$REVIEW_FLOOR"
  printf 'review_lane=%s\n' "$REVIEW_LANE"
  printf 'review_grade=%s\n' "$REVIEW_GRADE"
  printf 'review_filename=%s\n' "$REVIEW_FILENAME"
}

mode=${1:-}
case "$mode" in
  pair)
    [[ $# -eq 14 ]] || usage
    finalize_build "$2" "$3" "${@:4:5}"
    if [[ "$BUILD_GRADE" == G09 || "$BUILD_GRADE" == G10 ]]; then
      review_floor=10
    else
      review_floor=9
    fi
    finalize_review "$9" "$review_floor" "${@:10:5}"
    ;;
  build)
    [[ $# -eq 8 ]] || usage
    finalize_build "$2" "$3" "${@:4:5}"
    ;;
  review)
    [[ $# -eq 7 ]] || usage
    finalize_review "$2" 9 "${@:3:5}"
    ;;
  *)
    usage
    ;;
esac

printf 'finalizer=finalize-task-policy.sh\n'
printf 'finalizer_mode=%s\n' "$mode"
case "$mode" in
  pair)
    emit_build
    emit_review
    ;;
  build)
    emit_build
    ;;
  review)
    emit_review
    ;;
esac