import type { MigrationContext } from "../types";

export function generateSdkFiles(ctx: MigrationContext): Record<string, string> {
  const files: Record<string, string> = {};

  files["src/sdk/deviceServer.ts"] = generateDeviceServer();
  files["src/sdk/logger.ts"] = generateLogger();

  return files;
}

function generateDeviceServer(): string {
  return `import { createServerFn } from "@tanstack/react-start";
import { getRequestHeader } from "@tanstack/react-start/server";
import { detectDevice } from "@decocms/blocks/sdk/useDevice";

export const getDeviceFromServer = createServerFn({ method: "GET" }).handler(
  async () => {
    const ua = getRequestHeader("user-agent") ?? "";
    return detectDevice(ua);
  },
);
`;
}

function generateLogger(): string {
  return `type LogLevel = "debug" | "info" | "warn" | "error";

const LEVELS: Record<LogLevel, number> = { debug: 0, info: 1, warn: 2, error: 3 };
let minLevel: LogLevel = "info";

export function setLogLevel(level: LogLevel) {
  minLevel = level;
}

function shouldLog(level: LogLevel): boolean {
  return LEVELS[level] >= LEVELS[minLevel];
}

export function debug(...args: unknown[]) {
  if (shouldLog("debug")) console.debug(...args);
}

export function info(...args: unknown[]) {
  if (shouldLog("info")) console.info(...args);
}

export function warn(...args: unknown[]) {
  if (shouldLog("warn")) console.warn(...args);
}

export function error(...args: unknown[]) {
  if (shouldLog("error")) console.error(...args);
}

export const logger = { debug, info, warn, error, setLogLevel };
export default logger;
`;
}