#!/usr/bin/env bash
# Inspect / fetch image attachments (download only for vision agents).
# Emits step outputs: has_images (count) and files (opencode -f flags for downloaded images).
#
# Required env (provided by the workflow step): GT NUM VISION GITHUB_SERVER_URL GITHUB_REPOSITORY GITHUB_OUTPUT
set -eu

API="${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}"
mkdir -p /tmp/att
curl -sS -H "Authorization: token $GT" "$API/issues/$NUM/assets" > /tmp/att/list.json || echo '[]' > /tmp/att/list.json
imgcount=$(jq '[.[]? | select(.name|test("\\.(png|jpe?g|gif|webp)$";"i"))] | length' /tmp/att/list.json 2>/dev/null || echo 0)
echo "has_images=$imgcount" >> "$GITHUB_OUTPUT"
files=""
if [ "$VISION" = "true" ] && [ "${imgcount:-0}" -gt 0 ]; then
  i=0
  while IFS=$'\t' read -r url name; do
    [ -z "$url" ] && continue
    ext="${name##*.}"
    case "$ext" in
      png|jpg|jpeg|gif|webp|PNG|JPG|JPEG|GIF|WEBP)
        i=$((i+1)); out="/tmp/att/img_$i.${ext,,}"
        if curl -sSL -H "Authorization: token $GT" -o "$out" "$url" && [ -s "$out" ]; then
          files="$files -f $out"; echo "saved '$name' -> $out"
        fi ;;
    esac
  done < <(jq -r '.[]? | "\(.browser_download_url)\t\(.name)"' /tmp/att/list.json 2>/dev/null)
fi
echo "files=$files" >> "$GITHUB_OUTPUT"