"use client";

import { useRef, useState, useTransition } from "react";
import { createContainer, updateContainer } from "../server/actions";
import type { ContainerDto } from "../server/queries";

const CONTAINER_TYPES = [
  { value: "shelf", label: "Shelf" },
  { value: "terrarium", label: "Terrarium" },
  { value: "raised-bed", label: "Raised bed" },
  { value: "window-box", label: "Window box" },
  { value: "single-pot", label: "Single pot" },
  { value: "outdoor", label: "Outdoor" },
  { value: "other", label: "Other" },
];

type Props = {
  existing?: ContainerDto;
  onSuccess?: () => void;
  onCancel?: () => void;
};

export function ContainerForm({ existing, onSuccess, onCancel }: Props) {
  const [error, setError] = useState<string | null>(null);
  const [isPending, startTransition] = useTransition();
  const formRef = useRef<HTMLFormElement>(null);

  function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    const fd = new FormData(e.currentTarget);
    const input = {
      name: fd.get("name") as string,
      type: fd.get("type") as string,
      locationNotes: (fd.get("locationNotes") as string) || null,
    };

    setError(null);
    startTransition(async () => {
      try {
        if (existing) {
          await updateContainer({ id: existing.id, ...input });
        } else {
          await createContainer(input);
        }
        formRef.current?.reset();
        onSuccess?.();
      } catch {
        setError("Something went wrong. Please try again.");
      }
    });
  }

  return (
    <form ref={formRef} onSubmit={handleSubmit} className="flex flex-col gap-4">
      <div className="flex flex-col gap-1">
        <label htmlFor="container-name" className="text-sm font-medium">
          Name
        </label>
        <input
          id="container-name"
          name="name"
          required
          maxLength={120}
          defaultValue={existing?.name}
          placeholder="e.g. Living Room Shelf"
          className="input"
        />
      </div>

      <div className="flex flex-col gap-1">
        <label htmlFor="container-type" className="text-sm font-medium">
          Type
        </label>
        <select id="container-type" name="type" defaultValue={existing?.type ?? "other"}>
          {CONTAINER_TYPES.map((t) => (
            <option key={t.value} value={t.value}>
              {t.label}
            </option>
          ))}
        </select>
      </div>

      <div className="flex flex-col gap-1">
        <label htmlFor="container-notes" className="text-sm font-medium">
          Location notes
        </label>
        <textarea
          id="container-notes"
          name="locationNotes"
          maxLength={500}
          rows={2}
          defaultValue={existing?.locationNotes ?? ""}
          placeholder="Optional — e.g. south-facing window"
          className="input"
        />
      </div>

      {error && <p className="text-sm text-red-500">{error}</p>}

      <div className="flex gap-2 justify-end">
        {onCancel && (
          <button type="button" onClick={onCancel} className="btn btn-ghost" disabled={isPending}>
            Cancel
          </button>
        )}
        <button type="submit" className="btn btn-primary" disabled={isPending}>
          {isPending ? "Saving…" : existing ? "Save" : "Create"}
        </button>
      </div>
    </form>
  );
}