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

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

COMMON_ENV_FILE="${ROOT_DIR}/environment.client"
CLIENT_ENV_FILE="${ROOT_DIR}/deploy/client/.env"
MODE="${RPKI_RTR_CLIENT_MODE:-tcp}"
COMPOSE_PROJECT="${RPKI_RTR_CLIENT_COMPOSE_PROJECT:-rpki-rtr-client}"

usage() {
  cat <<'EOF'
Usage: scripts/11_start_client.sh [options]

Read root ./environment.client, update deploy/client/.env, then start the RTR debug client.

Options:
  --mode MODE    Client mode: tcp|tls|ssh. Default: tcp
  --env FILE     Client common env file. Default: ./environment.client
  -h, --help     Show this help.
EOF
}

log() {
  printf '[11_start_client] %s\n' "$*" >&2
}

stage() {
  printf '\n====== %s ======\n' "$*" >&2
}

die() {
  printf '[11_start_client] ERROR: %s\n' "$*" >&2
  exit 1
}

set_env_var() {
  local env_file="$1"
  local key="$2"
  local value="$3"
  local tmp_file

  tmp_file="${env_file}.tmp.$$"
  awk -v key="${key}" -v value="${value}" '
    BEGIN { done = 0 }
    $0 ~ "^[[:space:]]*#?[[:space:]]*" key "=" {
      if (!done) {
        print key "=" value
        done = 1
      }
      next
    }
    { print }
    END {
      if (!done) {
        print key "=" value
      }
    }
  ' "${env_file}" >"${tmp_file}"
  mv "${tmp_file}" "${env_file}"
}

compose_file_for_mode() {
  case "$1" in
    tcp) printf '%s\n' "${ROOT_DIR}/deploy/client/docker-compose.tcp.yml" ;;
    tls) printf '%s\n' "${ROOT_DIR}/deploy/client/docker-compose.tls.yml" ;;
    ssh) printf '%s\n' "${ROOT_DIR}/deploy/client/docker-compose.ssh.yml" ;;
    *) die "unsupported mode '$1', expected tcp|tls|ssh" ;;
  esac
}

while [ "$#" -gt 0 ]; do
  case "$1" in
    --mode)
      [ "$#" -ge 2 ] || die "--mode requires a value"
      MODE="$2"
      shift 2
      ;;
    --env)
      [ "$#" -ge 2 ] || die "--env requires a value"
      COMMON_ENV_FILE="$2"
      shift 2
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    *)
      die "unknown option: $1"
      ;;
  esac
done

CLIENT_COMPOSE_FILE="$(compose_file_for_mode "${MODE}")"

stage "Checking Docker"
command -v docker >/dev/null 2>&1 || die "docker command not found"
if docker compose version >/dev/null 2>&1; then
  COMPOSE_BIN=(docker compose)
elif command -v docker-compose >/dev/null 2>&1 && docker-compose version >/dev/null 2>&1; then
  COMPOSE_BIN=(docker-compose)
else
  die "docker compose is not available"
fi

[ -f "${CLIENT_ENV_FILE}" ] || die "deploy client env file not found: ${CLIENT_ENV_FILE}"
[ -f "${CLIENT_COMPOSE_FILE}" ] || die "client compose file not found: ${CLIENT_COMPOSE_FILE}"

stage "Reading Client Environment"
if [ -f "${COMMON_ENV_FILE}" ]; then
  updated_count=0
  while IFS= read -r line || [ -n "${line}" ]; do
    case "${line}" in
      ''|\#*) continue ;;
      *=*)
        key="${line%%=*}"
        value="${line#*=}"
        set_env_var "${CLIENT_ENV_FILE}" "${key}" "${value}"
        updated_count=$((updated_count + 1))
        ;;
    esac
  done <"${COMMON_ENV_FILE}"
  log "updated ${updated_count} client env variable(s)"
else
  log "environment.client file not found, skip env update"
fi

stage "Starting RTR Debug Client"
log "mode: ${MODE}"
"${COMPOSE_BIN[@]}" --env-file "${CLIENT_ENV_FILE}" -p "${COMPOSE_PROJECT}" -f "${CLIENT_COMPOSE_FILE}" up -d --no-build rtr-debug-client

log "checking client compose status"
"${COMPOSE_BIN[@]}" --env-file "${CLIENT_ENV_FILE}" -p "${COMPOSE_PROJECT}" -f "${CLIENT_COMPOSE_FILE}" ps rtr-debug-client

stage "Client Started"