#!/usr/bin/env bash
# Validate XDC Zero relayer env/default example files for key presence and drift.
# Usage: bash scripts/validation/validate-xdc-zero-relayer-env.sh

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"

DOTENV_FILE="$PROJECT_ROOT/config/xdc-zero/xdc-relayer.dotenv.example"
PAIR_ENV_FILE="$PROJECT_ROOT/config/xdc-zero/xdc-zero-chain138-pair.example.env"
DEFAULTS_FILE="$PROJECT_ROOT/config/xdc-zero/xdc-zero-relayer-138-pair.example.defaults"
SERVICE_FILE="$PROJECT_ROOT/config/systemd/xdc-zero-relayer-138-pair.example.service"

for f in "$DOTENV_FILE" "$PAIR_ENV_FILE" "$DEFAULTS_FILE" "$SERVICE_FILE"; do
  [[ -f "$f" ]] || { echo "ERROR: missing file: $f" >&2; exit 1; }
done

require_key() {
  local file="$1"
  local key="$2"
  if ! grep -qE "^${key}=" "$file"; then
    echo "ERROR: missing ${key}= in $file" >&2
    exit 1
  fi
}

value_for() {
  local file="$1"
  local key="$2"
  sed -n "s/^${key}=//p" "$file" | head -n 1
}

for key in RELAYER_PORT NODE_ENV SUBNET_URL PARENTNET_URL CHECKPOINT_CONTRACT MAX_FETCH_BLOCK_SIZE; do
  require_key "$DOTENV_FILE" "$key"
  require_key "$DEFAULTS_FILE" "$key"
done

for key in XDC_PARENTNET_URL RPC_URL_138 PARENTNET_URL SUBNET_URL CHECKPOINT_CONTRACT_138_ON_PARENT REVERSE_CHECKPOINT_CONTRACT_PARENT_ON_138; do
  require_key "$PAIR_ENV_FILE" "$key"
done

for key in RELAYER_PORT NODE_ENV PARENTNET_URL SUBNET_URL MAX_FETCH_BLOCK_SIZE; do
  v1="$(value_for "$DOTENV_FILE" "$key")"
  v2="$(value_for "$DEFAULTS_FILE" "$key")"
  if [[ "$v1" != "$v2" ]]; then
    echo "ERROR: drift for $key between $(basename "$DOTENV_FILE") and $(basename "$DEFAULTS_FILE"): '$v1' != '$v2'" >&2
    exit 1
  fi
done

if ! grep -qF 'xdc-zero-relayer-138-pair.example.defaults' "$SERVICE_FILE"; then
  echo "ERROR: systemd example should reference xdc-zero-relayer-138-pair.example.defaults" >&2
  exit 1
fi

if ! grep -qE 'xdc-relayer\.dotenv\.example.*clone-local' "$PROJECT_ROOT/config/xdc-zero/README.md"; then
  echo "ERROR: config/xdc-zero/README.md should describe clone-local use of xdc-relayer.dotenv.example" >&2
  exit 1
fi

echo "[OK] XDC Zero relayer env/default examples are aligned"