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

API="${TRADEIN_API_URL:-http://localhost:8000}"
BATCH="${BATCH_SIZE:-100}"
MAX_ITERS="${MAX_ITERS:-1000}"
DO_LISTINGS="${DO_LISTINGS:-true}"
DO_VALUATIONS="${DO_VALUATIONS:-true}"
DO_HOUSES="${DO_HOUSES:-false}"  # houses stubbed until cian_zhk_url migration

usage() {
  cat <<EOF
Cian backfill runner — drains offer_price_history + external_valuations backlog.

Usage:
  $0 [--dry-run]

Env vars:
  TRADEIN_API_URL  default: http://localhost:8000
  BATCH_SIZE       default: 100   (max 200 per endpoint cap)
  MAX_ITERS        default: 1000  (safety stop)
  DO_LISTINGS      default: true
  DO_VALUATIONS    default: true
  DO_HOUSES        default: false (no cian_zhk_url col yet)

Examples:
  $0 --dry-run                       # count what would be processed
  BATCH_SIZE=50 $0                   # drain at half pace
  DO_VALUATIONS=false $0             # only history
  TRADEIN_API_URL=https://gendsgn.ru/api $0
EOF
}

DRY=""
if [[ "${1:-}" == "--dry-run" ]]; then DRY="&dry_run=true"; fi
if [[ "${1:-}" == "-h" || "${1:-}" == "--help" ]]; then usage; exit 0; fi

echo "Cian backfill: API=$API BATCH=$BATCH listings=$DO_LISTINGS valuations=$DO_VALUATIONS houses=$DO_HOUSES dry=${DRY:-no}"

cum_listings=0
cum_valuations=0
i=0
while (( i < MAX_ITERS )); do
  i=$((i+1))
  url="$API/api/v1/admin/scrape/cian-backfill-history?batch_size=$BATCH&do_listings=$DO_LISTINGS&do_valuations=$DO_VALUATIONS&do_houses=$DO_HOUSES${DRY}"
  resp=$(curl -fsS -X POST "$url")
  lt=$(echo "$resp" | jq -r '.listings_total // 0')
  vt=$(echo "$resp" | jq -r '.valuations_total // 0')
  ls=$(echo "$resp" | jq -r '.listings_succeeded // 0')
  vs=$(echo "$resp" | jq -r '.valuations_succeeded // 0')
  dur=$(echo "$resp" | jq -r '.duration_sec // 0')
  cum_listings=$((cum_listings + ls))
  cum_valuations=$((cum_valuations + vs))
  echo "[$i] listings=$lt (ok=$ls) valuations=$vt (ok=$vs) ${dur}s  cum: hist=$cum_listings val=$cum_valuations"
  if (( lt == 0 && vt == 0 )); then
    echo "Drained — stopping."
    break
  fi
  if [[ -n "$DRY" ]]; then
    echo "Dry-run — no DB writes; stopping after first probe."
    break
  fi
done
echo "Done. Total: history=$cum_listings valuations=$cum_valuations iterations=$i"