datetime

import { tool, type ToolsProviderController } from "@lmstudio/sdk";

export async function toolsProvider(ctl: ToolsProviderController) {
  const resolvedOptions = Intl.DateTimeFormat().resolvedOptions();
  const timezone = resolvedOptions.timeZone;

  function getTimezoneOffset(): string {
    const tz = resolvedOptions.timeZone;
    const date = new Date();
    const utcDate = new Date(date.toLocaleString("en-US", { timeZone: "UTC" }));
    const tzDate = new Date(date.toLocaleString("en-US", { timeZone: tz }));
    const diffMs = tzDate.getTime() - utcDate.getTime();
    const diffHours = Math.floor(Math.abs(diffMs) / 3600000);
    const diffMins = Math.floor((Math.abs(diffMs) % 3600000) / 60000);
    const sign = diffMs >= 0 ? "+" : "-";
    return `${sign}${diffHours.toString().padStart(2, "0")}:${diffMins.toString().padStart(2, "0")}`;
  }

  const getDatetimeTool = tool({
    name: "get_current_datetime",
    description:
      "Get the current system date and time. Use this tool whenever the user asks about the current date, time, day of the week, or any time-sensitive information.",
    parameters: {},
    implementation: async () => {
      const currentDate = new Date();
      const locale = undefined as unknown as string;

      return {
        datetime: currentDate.toISOString(),
        local_datetime: new Intl.DateTimeFormat(locale, {
          year: "numeric",
          month: "numeric",
          day: "numeric",
          hour: "numeric",
          minute: "numeric",
          second: "numeric",
        }).format(currentDate),
        local_date: new Intl.DateTimeFormat(locale, {
          year: "numeric",
          month: "numeric",
          day: "numeric",
        }).format(currentDate),
        local_time: new Intl.DateTimeFormat(locale, {
          hour: "numeric",
          minute: "numeric",
          second: "numeric",
        }).format(currentDate),
        day_of_week: new Intl.DateTimeFormat(locale, { weekday: "long" }).format(currentDate),
        timezone: timezone,
        timezone_offset: getTimezoneOffset(),
        unix_timestamp: Math.floor(currentDate.getTime() / 1000),
      };
    },
  });

  return [getDatetimeTool];
}