"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { AdminDialog } from "@/components/ui/admin-dialog";
import { createVessel, updateVessel, toggleVesselActive } from "./actions";

type VesselRow = {
  id: string;
  name: string;
  code: string;
  isActive: boolean;
};

const INPUT = "w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20";

function VesselFormFields({ vessel, suggestedCode }: { vessel?: VesselRow; suggestedCode?: string }) {
  return (
    <div className="space-y-3">
      <div>
        <label className="block text-xs font-medium text-neutral-700 mb-1">Code *</label>
        {vessel ? (
          <p className="font-mono text-sm text-neutral-700 px-3 py-2 bg-neutral-50 rounded-lg border border-neutral-200">
            {vessel.code}
          </p>
        ) : (
          <input
            name="code"
            required
            defaultValue={suggestedCode}
            placeholder="e.g. SITE-001"
            className={`${INPUT} font-mono`}
          />
        )}
      </div>
      <div>
        <label className="block text-xs font-medium text-neutral-700 mb-1">Cost Centre Name *</label>
        <input name="name" defaultValue={vessel?.name} required className={INPUT} />
      </div>
    </div>
  );
}

export function AddVesselButton({ suggestedCode }: { suggestedCode?: string }) {
  const router = useRouter();
  const [open, setOpen] = useState(false);
  const [pending, setPending] = useState(false);
  const [error, setError] = useState("");

  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setPending(true);
    setError("");
    const result = await createVessel(new FormData(e.currentTarget));
    if ("error" in result) { setError(result.error); setPending(false); }
    else { setPending(false); setOpen(false); router.refresh(); }
  }

  return (
    <>
      <button onClick={() => setOpen(true)}
        className="rounded-lg bg-primary-600 px-4 py-2.5 text-sm font-semibold text-white hover:bg-primary-700 transition-colors">
        + Add Cost Centre
      </button>
      <AdminDialog title="Add Cost Centre" open={open} onClose={() => setOpen(false)}>
        <form onSubmit={handleSubmit} className="space-y-4">
          <VesselFormFields suggestedCode={suggestedCode} />
          {error && <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">{error}</p>}
          <div className="flex justify-end gap-3 pt-1">
            <button type="button" onClick={() => setOpen(false)}
              className="rounded-lg border border-neutral-300 px-4 py-2 text-sm font-medium text-neutral-700 hover:bg-neutral-50">
              Cancel
            </button>
            <button type="submit" disabled={pending}
              className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60">
              {pending ? "Creating…" : "Create Cost Centre"}
            </button>
          </div>
        </form>
      </AdminDialog>
    </>
  );
}

export function EditVesselButton({
  vessel,
  open: controlledOpen,
  onOpenChange,
}: {
  vessel: VesselRow;
  open?: boolean;
  onOpenChange?: (v: boolean) => void;
}) {
  const router = useRouter();
  const [internalOpen, setInternalOpen] = useState(false);
  const [pending, setPending] = useState(false);
  const [error, setError] = useState("");

  const isControlled = controlledOpen !== undefined;
  const open = isControlled ? controlledOpen : internalOpen;
  const setOpen = isControlled ? (onOpenChange ?? (() => {})) : setInternalOpen;

  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
    e.preventDefault();
    setPending(true);
    setError("");
    const fd = new FormData(e.currentTarget);
    fd.set("id", vessel.id);
    const result = await updateVessel(fd);
    if ("error" in result) { setError(result.error); setPending(false); }
    else { setPending(false); setOpen(false); router.refresh(); }
  }

  return (
    <>
      {!isControlled && (
        <button onClick={() => setOpen(true)}
          className="rounded border border-primary-200 bg-primary-50 px-2.5 py-1 text-xs font-medium text-primary-700 hover:bg-primary-100 transition-colors">
          Edit
        </button>
      )}
      <AdminDialog title="Edit Cost Centre" open={open} onClose={() => setOpen(false)}>
        <form onSubmit={handleSubmit} className="space-y-4">
          <VesselFormFields vessel={vessel} />
          {error && <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">{error}</p>}
          <div className="flex justify-end gap-3 pt-1">
            <button type="button" onClick={() => setOpen(false)}
              className="rounded-lg border border-neutral-300 px-4 py-2 text-sm font-medium text-neutral-700 hover:bg-neutral-50">
              Cancel
            </button>
            <button type="submit" disabled={pending}
              className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60">
              {pending ? "Saving…" : "Save Changes"}
            </button>
          </div>
        </form>
      </AdminDialog>
    </>
  );
}