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

# 一次性安装 shunfeng 无源码运行目录。本脚本只复制运行配置，不重启服务。

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEPLOY_HOME="${DEPLOY_HOME:-/home/emp-shunfeng}"
RUNTIME_DIR="${RUNTIME_DIR:-$DEPLOY_HOME/runtime}"
EXISTING_ENV_FILE="${EXISTING_ENV_FILE:-}"

log() {
  echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*"
}

die() {
  echo "ERROR: $*" >&2
  exit 1
}

validate_runtime() {
  local compose_cmd=()
  if docker compose version >/dev/null 2>&1; then
    compose_cmd=(docker compose)
  elif command -v docker-compose >/dev/null 2>&1; then
    compose_cmd=(docker-compose)
  else
    die "missing docker compose"
  fi

  (
    set -a
    # shellcheck disable=SC1090
    . "$RUNTIME_DIR/release.env"
    set +a

    [[ "${RUNTIME_DIR:-}" == "/home/emp-shunfeng/runtime" ]] \
      || die "RUNTIME_DIR must be /home/emp-shunfeng/runtime"
    [[ "${BACKEND_COMPOSE_FILE:-}" == "$RUNTIME_DIR/docker-compose.yml" ]] \
      || die "BACKEND_COMPOSE_FILE does not match RUNTIME_DIR"
    [[ "${BACKEND_ENV_FILE:-}" == "$RUNTIME_DIR/.env" ]] \
      || die "BACKEND_ENV_FILE does not match RUNTIME_DIR"
    [[ "${REMOTE_DEPLOY_HOME:-}" == "/home/emp-shunfeng" ]] \
      || die "REMOTE_DEPLOY_HOME must be /home/emp-shunfeng"
    [[ "${REMOTE_RUNTIME_DIR:-}" == "/home/emp-shunfeng/runtime" ]] \
      || die "REMOTE_RUNTIME_DIR must be /home/emp-shunfeng/runtime"
    [[ -n "${PRIMARY_HOST:-}" && -n "${REMOTE_HOST:-}" ]] \
      || die "PRIMARY_HOST and REMOTE_HOST are required"

    BACKEND_ENV_FILE="$RUNTIME_DIR/.env" IMAGE_TAG=latest "${compose_cmd[@]}" \
      --env-file "$RUNTIME_DIR/.env" \
      -f "$RUNTIME_DIR/docker-compose.yml" \
      -p "${BACKEND_PROJECT_NAME:-emp_server}" \
      config >/dev/null
  )
  log "Runtime configuration validation passed"
}

[[ -f "$SCRIPT_DIR/docker-compose.yml" ]] || die "missing docker-compose.yml"
[[ -f "$SCRIPT_DIR/deploy-from-url.sh" ]] || die "missing deploy-from-url.sh"
[[ -f "$SCRIPT_DIR/release.env.example" ]] || die "missing release.env.example"

mkdir -p "$RUNTIME_DIR"
cp "$SCRIPT_DIR/docker-compose.yml" "$RUNTIME_DIR/docker-compose.yml"
cp "$SCRIPT_DIR/deploy-from-url.sh" "$RUNTIME_DIR/deploy-from-url.sh"
chmod +x "$RUNTIME_DIR/deploy-from-url.sh"

if [[ ! -f "$RUNTIME_DIR/.env" ]]; then
  if [[ -n "$EXISTING_ENV_FILE" ]]; then
    [[ -f "$EXISTING_ENV_FILE" ]] || die "existing env file not found: $EXISTING_ENV_FILE"
    cp "$EXISTING_ENV_FILE" "$RUNTIME_DIR/.env"
    chmod 600 "$RUNTIME_DIR/.env"
    log "Existing backend env copied to $RUNTIME_DIR/.env"
  elif [[ -f "$SCRIPT_DIR/.env.example" ]]; then
    cp "$SCRIPT_DIR/.env.example" "$RUNTIME_DIR/.env"
    chmod 600 "$RUNTIME_DIR/.env"
    log "Created $RUNTIME_DIR/.env from example; replace all placeholders before deployment"
  else
    die "no existing env file supplied and .env.example is missing"
  fi
else
  log "Keep existing runtime env: $RUNTIME_DIR/.env"
fi

if [[ ! -f "$RUNTIME_DIR/release.env" ]]; then
  cp "$SCRIPT_DIR/release.env.example" "$RUNTIME_DIR/release.env"
  chmod 600 "$RUNTIME_DIR/release.env"
  log "Created $RUNTIME_DIR/release.env; verify Compose project name and master/sub addresses"
else
  log "Keep existing release config: $RUNTIME_DIR/release.env"
fi

validate_runtime

log "Runtime files installed without restarting containers: $RUNTIME_DIR"
log "Next: deploy one image package and verify the services before deleting source"