#!/usr/bin/env bash
# Pure helpers for drill/drill.sh's generated release-record draft (#152).

drill_default_run_id() {
  local version="$1" run_date="$2"
  printf 'drill-%s-%s-01\n' "$version" "${run_date//-/}"
}

drill_resolve_ref_sha() {
  local repo="$1" ref="$2" remote refs sha
  case "$ref" in
    [0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
      printf '%s\n' "$ref"
      return
      ;;
  esac
  case "$repo" in
    /*|./*|../*|http://*|https://*|git@*) remote="$repo" ;;
    *) remote="https://github.com/$repo.git" ;;
  esac
  refs="$(git ls-remote "$remote" \
    "refs/heads/$ref" "refs/tags/$ref" "refs/tags/$ref^{}" 2>/dev/null)" || return 1
  sha="$(printf '%s\n' "$refs" | awk -v ref="$ref" '
    $2 == "refs/tags/" ref "^{}" { peeled=$1 }
    $2 == "refs/heads/" ref { head=$1 }
    $2 == "refs/tags/" ref { tag=$1 }
    END { if (peeled) print peeled; else if (tag) print tag; else if (head) print head }
  ')"
  [ -n "$sha" ] || return 1
  printf '%s\n' "$sha"
}

drill_write_record() {
  local path="$1" version="$2" run_id="$3" host="$4" run_date="$5"
  local box_repo="$6" box_ref="$7" box_sha="$8" rig_repo="$9"
  shift 9
  local rig_ref="$1" rig_sha="$2" invocation="$3" passed="$4" failed="$5"
  local elapsed="$6" findings_name="$7" tmp finding plain total minutes
  local -n record_findings="$findings_name"

  if [ -e "$path" ]; then
    echo "drill: record path already exists; refusing to overwrite evidence: $path" >&2
    return 1
  fi
  [ -d "$(dirname "$path")" ] || {
    echo "drill: record directory does not exist: $(dirname "$path")" >&2
    return 1
  }

  total=$((passed + failed))
  minutes=$((elapsed / 60))
  tmp="$(mktemp "$path.tmp.XXXXXX")" || return 1
  {
    printf '# Release drill — %s\n\n' "$version"
    printf '> Generated draft: verify the facts and add operator judgement before commit.\n\n'
    printf -- "- **Run ID:** \`%s\`\n" "$run_id"
    printf -- '- **Host:** %s\n' "$host"
    printf -- '- **Date:** %s\n' "$run_date"
    printf -- '- **Candidate refs:**\n'
    printf "  - box \`%s\` @ \`%s\` (\`%s\`)\n" "$box_ref" "$box_sha" "$box_repo"
    printf "  - rig \`%s\` @ \`%s\` (\`%s\`)\n" "$rig_ref" "$rig_sha" "$rig_repo"
    printf '\n## What ran\n\n'
    printf "\`%s\` — phases A, B, C, E, D, M.\n" "$invocation"
    printf '\n## Result\n\n'
    printf '**%s/%s passed, %s failed.** %s minutes wall clock.\n\n' \
      "$passed" "$total" "$failed" "$minutes"
    if [ "${#record_findings[@]}" -eq 0 ]; then
      printf -- '- No failures or notes recorded by the harness.\n'
    else
      for finding in "${record_findings[@]}"; do
        plain="$(printf '%s' "$finding" | sed $'s/\033\\[[0-9;]*m//g')"
        printf -- '- %s\n' "$plain"
      done
    fi
  } > "$tmp" || { rm -f "$tmp"; return 1; }
  mv "$tmp" "$path"
}