import { join, resolve } from 'path';

// Carga compatible del entorno: en SvelteKit usa $env/dynamic/private;
// en tests/ejecución fuera de SvelteKit cae a process.env.
let env: any;
try {
  const mod = await import('$env/dynamic/private');
  env = (mod as any).env;
} catch {
  env = process.env as any;
}

/**
 * Resuelve la ruta absoluta al archivo de la base de datos SQLite compartida.
 * Prioridad:
 * 1) DB_PATH (ruta completa al archivo)
 * 2) DATA_DIR + filename (en prod por defecto /app/data; en dev por defecto ./tmp)
 */
export function resolveDbAbsolutePath(filename: string = 'tasks.db'): string {
  const dbPathEnv = (env.DB_PATH || '').trim();
  if (dbPathEnv) {
    return resolve(dbPathEnv);
  }
  const isProdEnv = String(env.NODE_ENV || 'development').trim().toLowerCase() === 'production';
  const dataDir = env.DATA_DIR ? String(env.DATA_DIR) : (isProdEnv ? '/app/data' : 'tmp');
  return resolve(join(dataDir, filename));
}

export const WEB_BASE_URL = (env.WEB_BASE_URL || '').trim();
export const COOKIE_SECRET = (env.COOKIE_SECRET || '').trim();

const SESSION_IDLE_TTL_MIN = Number(env.SESSION_IDLE_TTL_MIN || 120);
export const sessionIdleTtlMs = Math.max(1, Math.floor(SESSION_IDLE_TTL_MIN)) * 60 * 1000;

export const NODE_ENV = (env.NODE_ENV || 'development').trim().toLowerCase();
export const isProd = () => NODE_ENV === 'production';
export const isDev = () => NODE_ENV === 'development';

// Flags de desarrollo (solo en entornos no productivos)
const toBool = (v: string) => ['1', 'true', 'yes', 'on'].includes(String(v || '').trim().toLowerCase());
export const DEV_BYPASS_AUTH = toBool(env.DEV_BYPASS_AUTH || '');
export const DEV_DEFAULT_USER = (env.DEV_DEFAULT_USER || 'demo').trim();
export const DEV_AUTOSEED_DB = toBool(env.DEV_AUTOSEED_DB || '');

// ICS: horizonte en meses y rate limit (por minuto, 0 = desactivado)
const ICS_HORIZON_MONTHS = Number(env.ICS_HORIZON_MONTHS || 12);
export const icsHorizonMonths = Math.max(1, Math.floor(ICS_HORIZON_MONTHS));

const ICS_RATE_LIMIT_PER_MIN = Number(env.ICS_RATE_LIMIT_PER_MIN || 0);
export const icsRateLimitPerMin = Math.max(0, Math.floor(ICS_RATE_LIMIT_PER_MIN));

// Uncomplete window (minutos; por defecto 1440 = 24h)
const UNCOMPLETE_WINDOW_MIN_RAW = Number(env.UNCOMPLETE_WINDOW_MIN || 1440);
export const UNCOMPLETE_WINDOW_MIN = Math.max(1, Math.floor(UNCOMPLETE_WINDOW_MIN_RAW));
export const uncompleteWindowMs = UNCOMPLETE_WINDOW_MIN * 60 * 1000;

// Reacciones (flags de característica para la web)
const REACTIONS_TTL_DAYS_RAW = Number(env.REACTIONS_TTL_DAYS || 14);
export const REACTIONS_TTL_DAYS = Math.max(1, Math.floor(REACTIONS_TTL_DAYS_RAW));
export const REACTIONS_ENABLED = toBool(env.REACTIONS_ENABLED || '');
export const REACTIONS_SCOPE = ((env.REACTIONS_SCOPE || 'groups').trim().toLowerCase() === 'all' ? 'all' : 'groups');
export const GROUP_GATING_MODE = (env.GROUP_GATING_MODE || 'off').trim().toLowerCase();