export const PORT = Number(Deno.env.get("GERBEUR_PORT")) || 8000;
export const SMTPS_URL = Deno.env.get("GERBEUR_SMTPS_URL")?.trim() || "";
export const FROM_EMAIL = Deno.env.get("GERBEUR_FROM_EMAIL")?.trim() || "";

const DEFAULT_WELCOME_EMAIL_BODY = `# Welcome to {{site_name}}!

Hi **{{username}}**,

Your account has been created successfully. Welcome aboard!`;

export const WELCOME_EMAIL_BODY =
  Deno.env.get("GERBEUR_WELCOME_EMAIL_BODY")?.trim() ||
  DEFAULT_WELCOME_EMAIL_BODY;
export const JWT_SECRET = Deno.env.get("GERBEUR_JWT_SECRET")?.trim() || "";
// GERBEUR_LISTEN_HOST controls the network interface Oak binds to.
// Defaults to 0.0.0.0 so Docker port-forwarding works out of the box.
// Set to 127.0.0.1 to restrict to loopback only.
export const LISTEN_HOST = Deno.env.get("GERBEUR_LISTEN_HOST") || "0.0.0.0";
// Public-facing URL of the server — used for CORS, WebSocket origin checks,
// email links, and OG image URLs. Behind a reverse proxy, set this to the
// externally-visible URL (e.g. https://example.com). No trailing slash.
// Defaults to http://localhost:PORT for local development.
export const PUBLIC_URL =
  Deno.env.get("GERBEUR_PUBLIC_URL")?.trim().replace(/\/$/, "") ||
  `http://localhost:${PORT}`;
// In single-container deployments the API serves the frontend, so FRONTEND_URL
// equals PUBLIC_URL. Override with GERBEUR_FRONTEND_URL when running the
// frontend on a separate host/port (e.g. Vite dev server or a CDN origin).
export const FRONTEND_URL = Deno.env.get("GERBEUR_FRONTEND_URL")?.trim() ||
  PUBLIC_URL;
export const DB_PATH = "api/sql/gerbeur.db";

// Upload/files
export const UPLOADS_DIR = "api/uploads";
export const DUMPS_DIR = `${UPLOADS_DIR}/dumps`;
export const AVATARS_DIR = `${UPLOADS_DIR}/avatars`;
export const PLAYLIST_IMAGES_DIR = `${UPLOADS_DIR}/playlist-images`;
export const ATTACHMENTS_DIR = `${UPLOADS_DIR}/attachments`;
export const THUMBNAILS_DIR = `${UPLOADS_DIR}/thumbnails`;

export const MAX_IMAGE_SIZE_BYTES = 5 * 1024 * 1024; // 5 MB
export const ALLOWED_IMAGE_MIMES = new Set([
  "image/jpeg",
  "image/png",
  "image/gif",
  "image/webp",
]);

export const DUMP_MAX_FILE_SIZE_BYTES = 50 * 1024 * 1024; // 50 MB
export const DUMP_ALLOWED_MIME_PREFIXES = [
  "text/",
  "image/",
  "video/",
  "audio/",
];
export const DUMP_ALLOWED_MIME_TYPES = new Set([
  "application/pdf",
  "application/json",
  "application/zip",
  "application/x-zip-compressed",
  "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
  "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
  "application/vnd.openxmlformats-officedocument.presentationml.presentation",
  "application/msword",
  "application/vnd.ms-excel",
  "application/vnd.ms-powerpoint",
]);

// Pagination
export const PAGINATION_DEFAULT_LIMIT = 20;
export const PAGINATION_MAX_LIMIT = 100;

// Startup housekeeping
export const ORPHANED_ATTACHMENTS_RETENTION_HOURS = 1;
export const UNUSED_INVITES_RETENTION_DAYS = 7;

// Validation constraints
export const VALIDATION = {
  USERNAME_MIN: 1,
  USERNAME_MAX: 32,
  PASSWORD_MIN: 8,
  PASSWORD_MAX: 128,
  DUMP_TITLE_MAX: 200,
  DUMP_COMMENT_MAX: 5000,
  PLAYLIST_TITLE_MAX: 100,
  PLAYLIST_DESCRIPTION_MAX: 2000,
  COMMENT_BODY_MAX: 5000,
  USER_DESCRIPTION_MAX: 2000,
} as const;

// SEO/OG
export const OG_SITE_NAME = Deno.env.get("GERBEUR_SITE_NAME") || "gerbeur";

const rawOrigins = Deno.env.get("GERBEUR_ALLOWED_ORIGINS") ?? "";
export const ALLOWED_ORIGINS: string[] = Array.from(
  new Set([
    PUBLIC_URL,
    // FRONTEND_URL is auto-included so the separate-frontend case only needs
    // GERBEUR_FRONTEND_URL — no need to repeat it in GERBEUR_ALLOWED_ORIGINS.
    FRONTEND_URL,
    ...rawOrigins.split(",").map((o) => o.trim()).filter(Boolean),
  ]),
);