"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { AdminDialog } from "@/components/ui/admin-dialog";
import { createRank, updateRank } from "./actions";
import type { RankRow } from "./ranks-manager";

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 RankFormFields({ rank, allRanks }: { rank?: RankRow; allRanks: RankRow[] }) {
  const parentOptions = allRanks.filter((r) => !rank || r.id !== rank.id);

  return (
    <div className="space-y-3">
      <div className="grid grid-cols-2 gap-3">
        <div>
          <label className="block text-xs font-medium text-neutral-700 mb-1">Code *</label>
          <input name="code" defaultValue={rank?.code} required maxLength={16} placeholder="e.g. SDO" className={INPUT} />
        </div>
        <div>
          <label className="block text-xs font-medium text-neutral-700 mb-1">Name *</label>
          <input name="name" defaultValue={rank?.name} required placeholder="e.g. Sr. Dredge Operator" className={INPUT} />
        </div>
      </div>

      <div className="grid grid-cols-2 gap-3">
        <div>
          <label className="block text-xs font-medium text-neutral-700 mb-1">Reports to</label>
          <select name="parentId" defaultValue={rank?.parentId ?? ""} className={INPUT}>
            <option value="">— Top of the org —</option>
            {parentOptions.map((r) => (
              <option key={r.id} value={r.id}>
                {r.code} — {r.name}
              </option>
            ))}
          </select>
        </div>
        <div>
          <label className="block text-xs font-medium text-neutral-700 mb-1">Category</label>
          <select name="category" defaultValue={rank?.category ?? "OPERATIONAL"} className={INPUT}>
            <option value="OPERATIONAL">Operational</option>
            <option value="SUPPORT">Support</option>
          </select>
        </div>
      </div>

      <div className="flex items-center gap-6 pt-1">
        <label className="flex items-center gap-2 text-sm text-neutral-700">
          <input type="checkbox" name="isSeafarer" defaultChecked={rank?.isSeafarer ?? false} className="h-4 w-4" />
          Seafarer (holds STCW / CDC etc.)
        </label>
        <label className="flex items-center gap-2 text-sm text-neutral-700">
          <input type="checkbox" name="grantsLogin" defaultChecked={rank?.grantsLogin ?? false} className="h-4 w-4" />
          Grants portal login
        </label>
      </div>

      <div>
        <label className="block text-xs font-medium text-neutral-700 mb-1">Description</label>
        <input name="description" defaultValue={rank?.description ?? ""} className={INPUT} placeholder="Optional" />
      </div>
    </div>
  );
}

export function AddRankButton({ allRanks }: { allRanks: RankRow[] }) {
  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 createRank(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 Rank
      </button>
      <AdminDialog title="Add Rank" open={open} onClose={() => setOpen(false)}>
        <form onSubmit={handleSubmit} className="space-y-4">
          <RankFormFields allRanks={allRanks} />
          {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 Rank"}
            </button>
          </div>
        </form>
      </AdminDialog>
    </>
  );
}

export function EditRankButton({
  rank,
  allRanks,
  open: controlledOpen,
  onOpenChange,
}: {
  rank: RankRow;
  allRanks: RankRow[];
  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", rank.id);
    const result = await updateRank(fd);
    if ("error" in result) {
      setError(result.error);
      setPending(false);
    } else {
      setPending(false);
      setOpen(false);
      router.refresh();
    }
  }

  return (
    <AdminDialog title="Edit Rank" open={open} onClose={() => setOpen(false)}>
      <form onSubmit={handleSubmit} className="space-y-4">
        <RankFormFields rank={rank} allRanks={allRanks} />
        {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>
  );
}