"use client";

import { useState } from "react";
import type { ToolCallMessagePartComponent } from "@assistant-ui/react";
import { CalendarIcon, CheckCircle2Icon } from "lucide-react";

type DatePickerArgs = {
  prompt: string;
  minDate?: string;
  maxDate?: string;
};

type DatePickerResult = {
  date: string;
};

export const DatePickerToolUI: ToolCallMessagePartComponent<
  DatePickerArgs,
  DatePickerResult
> = function DatePickerUI({ args, result, addResult }) {
  const [value, setValue] = useState("");

  if (result) {
    return (
      <div className="my-2 flex items-center gap-2 rounded-lg border border-green-200 bg-green-50 p-3">
        <CheckCircle2Icon className="size-4 text-green-600" />
        <span className="text-sm text-green-800">
          Selected: {new Date(result.date).toLocaleDateString()}
        </span>
      </div>
    );
  }

  return (
    <div className="my-2 rounded-lg border p-4">
      <div className="mb-3 flex items-center gap-2">
        <CalendarIcon className="text-muted-foreground size-4" />
        <span className="text-sm font-medium">{args.prompt}</span>
      </div>
      <div className="flex items-center gap-2">
        <input
          type="date"
          value={value}
          min={args.minDate}
          max={args.maxDate}
          onChange={(e) => setValue(e.target.value)}
          className="bg-background rounded-md border px-3 py-2 text-sm"
        />
        <button
          type="button"
          disabled={!value}
          onClick={() => addResult({ date: new Date(value).toISOString() })}
          className="bg-primary text-primary-foreground rounded-md px-4 py-2 text-sm font-medium disabled:opacity-50"
        >
          Confirm
        </button>
      </div>
    </div>
  );
};