#!/bin/bash
# =============================================================================
# slides-read — Read a Google Slides deck as text, slide by slide
#
# Backed by GET /api/google/slides/:id.
#
# Usage:
#   bash execute.sh --id <presentationId>
#   bash execute.sh '{"id":"<presentationId>"}'
# =============================================================================
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${SCRIPT_DIR}/../../_common/lib.sh"

print_usage() {
  cat <<'EOF_USAGE'
Usage:
  bash execute.sh --id <presentationId>
  bash execute.sh '{"id":"<presentationId>"}'

Options:
  --id          Presentation id (or its URL)
  --account     Which connected Google account to act as (default: your primary)
  --help | -h   Show this help
EOF_USAGE
}

fail_from() {
  printf '%s' "$1" | jq -c '{success: false, reason: (.details.error // .details // .error // "unknown"), hint: (.details.hint // ""), message: (.details.message // "")}' 2>/dev/null \
    || jq -n --arg r "$1" '{success: false, reason: $r}'
  exit 1
}

uri() { jq -rn --arg v "$1" '$v|@uri'; }

# api_call may print a one-line warning to stderr (no CREWLY_SESSION_NAME);
# the backend answer is always the last line. On failure print the mapped
# failure JSON (fail_from) and return 1.
call() {
  local out
  out=$(api_call "$@" 2>&1) || { fail_from "$(printf '%s
' "$out" | tail -n 1)"; }
  printf '%s
' "$out" | tail -n 1
}

INPUT_JSON=""
if [[ $# -gt 0 && ${1:0:1} == '{' ]]; then
  INPUT_JSON="$1"
  shift || true
fi
ID=""; ACCOUNT=""
while [[ $# -gt 0 ]]; do
  case "$1" in
    --id)      [ $# -ge 2 ] || error_exit "--id requires a value"; ID="$2"; shift 2 ;;
    --account)  [ $# -ge 2 ] || error_exit "--account requires a value"; ACCOUNT="$2"; shift 2 ;;
    --help|-h) print_usage; exit 0 ;;
    *) unknown_arg_exit "$1" ;;
  esac
done
if [ -n "$INPUT_JSON" ]; then
  INPUT=$(read_json_input "$INPUT_JSON")
  [ -z "$ID" ] && ID=$(printf '%s' "$INPUT" | jq -r '.id // .presentationId // empty')
  [ -z "$ACCOUNT" ] && ACCOUNT=$(printf '%s' "$INPUT" | jq -r '.account // empty')
fi
# Route the call at one connected Google account; unset means the default.
[ -n "$ACCOUNT" ] && export CREWLY_GOOGLE_ACCOUNT="$ACCOUNT"
ID=$(printf '%s' "$ID" | sed -E 's#.*/presentation/d/([^/?]+).*#\1#')
require_param "id (--id)" "$ID"
RESPONSE=$(call GET "/google/slides/$(uri "$ID")") || { printf '%s\n' "$RESPONSE"; exit 1; }
if printf '%s' "$RESPONSE" | jq -e '.truncated == true' >/dev/null 2>&1; then printf '%s\n' "$RESPONSE"; exit 0; fi
printf '%s' "$RESPONSE" | jq -c '{id: .data.id, title: .data.title, slideCount: .data.slideCount, webViewLink: .data.webViewLink, slides: [.data.slides[] | {index, lines} + (if .notes then {notes} else {} end)]}'