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

ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
ENV_FILE="${1:-$ROOT_DIR/.env}"
DATA_DIR="$ROOT_DIR/data"
COMPOSE_FILE="$ROOT_DIR/docker-compose.yml"
AGENT_TEMPLATES_FILE="$DATA_DIR/templates/agent_md_templates.json"
TOPIC_PRESETS_FILE="$DATA_DIR/templates/topic_presets.json"
SKILLS_DIR="$DATA_DIR/skills"

if [[ ! -f "$ENV_FILE" && -f "$ROOT_DIR/.env.prod" ]]; then
  ENV_FILE="$ROOT_DIR/.env.prod"
fi

if [[ ! -f "$COMPOSE_FILE" && -f "$ROOT_DIR/docker-compose.prod.yml" ]]; then
  COMPOSE_FILE="$ROOT_DIR/docker-compose.prod.yml"
fi

require_file() {
  local path="$1"
  local hint="${2:-}"
  if [[ -f "$path" ]]; then
    return 0
  fi
  echo "Missing file: $path"
  [[ -n "$hint" ]] && echo "$hint"
  exit 1
}

require_dir() {
  local path="$1"
  local hint="${2:-}"
  if [[ -d "$path" ]]; then
    return 0
  fi
  echo "Missing directory: $path"
  [[ -n "$hint" ]] && echo "$hint"
  exit 1
}

require_env() {
  local name="$1"
  [[ -n "${!name:-}" ]] || { echo "Missing required env: $name"; exit 1; }
}

read_env_value() {
  local key="$1"
  local line=""
  local value=""

  while IFS= read -r line || [[ -n "$line" ]]; do
    line="${line%$'\r'}"
    [[ -z "${line//[[:space:]]/}" ]] && continue
    [[ "${line#\#}" != "$line" ]] && continue
    [[ "${line#export }" != "$line" ]] && line="${line#export }"
    [[ "$line" == "$key="* ]] || continue
    value="${line#*=}"
    if [[ "$value" =~ ^\"(.*)\"$ ]]; then
      value="${BASH_REMATCH[1]}"
    elif [[ "$value" =~ ^\'(.*)\'$ ]]; then
      value="${BASH_REMATCH[1]}"
    fi
    printf '%s' "$value"
    return 0
  done < "$ENV_FILE"

  return 1
}

load_env_var() {
  local name="$1"
  local default_value="${2:-}"
  local value=""
  value="$(read_env_value "$name" || true)"
  if [[ -z "$value" ]]; then
    value="$default_value"
  fi
  printf -v "$name" '%s' "$value"
}

is_truthy() {
  local value="${1:-}"
  value="$(printf '%s' "$value" | tr '[:upper:]' '[:lower:]')"
  [[ "$value" =~ ^(1|true|yes|on)$ ]]
}

require_file "$ENV_FILE" "Expected bundle config file such as .env"
require_file "$COMPOSE_FILE"
require_file "$AGENT_TEMPLATES_FILE"
require_file "$TOPIC_PRESETS_FILE"
require_dir "$SKILLS_DIR"

load_env_var HOST_BOTS_WORKSPACE_ROOT
load_env_var DATABASE_URL
load_env_var NGINX_PORT 8080
load_env_var REDIS_ENABLED false
load_env_var REDIS_URL
load_env_var PUBLIC_HOST ""

require_env HOST_BOTS_WORKSPACE_ROOT
require_env DATABASE_URL
require_env NGINX_PORT

case "$HOST_BOTS_WORKSPACE_ROOT" in
  /*) ;;
  *)
    echo "HOST_BOTS_WORKSPACE_ROOT must be an absolute host path: $HOST_BOTS_WORKSPACE_ROOT"
    exit 1
    ;;
esac

if [[ ! -S /var/run/docker.sock ]]; then
  echo "Missing required mount source: /var/run/docker.sock"
  exit 1
fi

if [[ "$DATABASE_URL" != postgresql* ]]; then
  echo "Unsupported DATABASE_URL for deploy-prod-offline.sh: $DATABASE_URL"
  exit 1
fi

if is_truthy "$REDIS_ENABLED" && [[ -z "$REDIS_URL" ]]; then
  echo "Missing required env: REDIS_URL"
  exit 1
fi

echo "[deploy-prod-offline] using env: $ENV_FILE"
mkdir -p "$DATA_DIR" "$DATA_DIR/model" "$HOST_BOTS_WORKSPACE_ROOT"

echo "[deploy-prod-offline] expecting external PostgreSQL to be pre-initialized with sql/create-tables.sql and sql/init-data.sql, or by running ./init-db.sh"
docker compose --env-file "$ENV_FILE" -f "$COMPOSE_FILE" config -q
docker compose --env-file "$ENV_FILE" -f "$COMPOSE_FILE" up -d

echo "[deploy-prod-offline] service status"
docker compose --env-file "$ENV_FILE" -f "$COMPOSE_FILE" ps

if [[ -n "$PUBLIC_HOST" ]]; then
  echo "[deploy-prod-offline] open: http://${PUBLIC_HOST}:${NGINX_PORT}"
fi

echo "[deploy-prod-offline] done"