#!/usr/bin/env bash
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SKILL_ROOT="$(dirname "$SCRIPT_DIR")"
source "$SCRIPT_DIR/_common.sh"

: "${ETH_RPC_URL:=}"
: "${CHAIN_ID:=1}"
: "${TO_ADDRESS:=0x0000000000000000000000000000000000000000}"
: "${GAS_LIMIT:=60000}"
: "${VALUE_WEI:=0}"
: "${ETH_PRIVATE_KEY:=}"
: "${LABEL:=eth-anchor}"

main() {
  confirm_gate
  [[ -n "$ETH_RPC_URL" ]] || die "ETH_RPC_URL required."
  [[ -n "$ETH_PRIVATE_KEY" ]] || die "ETH_PRIVATE_KEY required."

  mkdir -p "$SKILL_ROOT/outputs/runs"
  ts="$(date -Iseconds | tr ':' '-')"
  run_dir="$SKILL_ROOT/outputs/runs/${LABEL}_${ts}"
  mkdir -p "$run_dir"

  root_hex="$(read_root_hex)"
  payload="$(pad_to_32_bytes_hex "$root_hex")"
  echo "$root_hex" > "$run_dir/root_hex.txt"

  # send tx
  log_info "Sending calldata tx..."
  tx_hash="$(cast send --rpc-url "$ETH_RPC_URL" --private-key "$ETH_PRIVATE_KEY" \
    --gas-limit "$GAS_LIMIT" --value "$VALUE_WEI" \
    "$TO_ADDRESS" "0x$payload" | awk '/transactionHash/ {print $2}' | tr -d '\r' || true)"

  # cast output format varies; fallback: take last 0x... in output
  if [[ -z "$tx_hash" ]]; then
    tx_hash="$(cast send --rpc-url "$ETH_RPC_URL" --private-key "$ETH_PRIVATE_KEY" \
      --gas-limit "$GAS_LIMIT" --value "$VALUE_WEI" \
      "$TO_ADDRESS" "0x$payload" 2>/dev/null | grep -Eo '0x[a-fA-F0-9]{64}' | tail -n1 || true)"
  fi
  [[ -n "$tx_hash" ]] || die "Unable to parse tx hash from cast output."

  echo "$tx_hash" > "$run_dir/tx_hash.txt"

  log_info "Fetching receipt..."
  cast receipt --rpc-url "$ETH_RPC_URL" "$tx_hash" --json > "$run_dir/tx_receipt.json" || true

  cat > "$run_dir/PROOF.json" <<EOF
{
  "skill": "eth-anchor",
  "version": "1.0.0",
  "timestamp": "$(date -Iseconds)",
  "chain_id": "$(cast chain-id --rpc-url "$ETH_RPC_URL")",
  "to": "$TO_ADDRESS",
  "value_wei": "$VALUE_WEI",
  "gas_limit": "$GAS_LIMIT",
  "root_hex": "$(json_escape "$root_hex")",
  "calldata": "0x$payload",
  "tx_hash": "$(json_escape "$tx_hash")",
  "artifacts": {
    "root_hex_file": "root_hex.txt",
    "tx_hash_file": "tx_hash.txt",
    "tx_receipt": "tx_receipt.json"
  }
}
EOF

  echo "$run_dir" > "$SKILL_ROOT/outputs/last_run_dir.txt"
  log_info "Anchored on ETH. tx=$tx_hash"
  log_info "Run dir: $run_dir"
}
main "$@"