"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import LinkEntityModal from "@/components/LinkEntityModal";
import { text } from "@/lib/format";
import type { YsterbaardDirector } from "@/lib/types";

interface JunctionEntry {
  id: string;
  director_id: string;
  director: YsterbaardDirector;
}

interface Props {
  companyId: string;
  companyName: string;
  initial: JunctionEntry[];
}

export default function LinkedDirectorsList({ companyId, companyName, initial }: Props) {
  const router = useRouter();
  const [showLinkModal, setShowLinkModal] = useState(false);
  const [unlinking, setUnlinking] = useState<string | null>(null);
  const [linked, setLinked] = useState<JunctionEntry[]>(initial);
  const [error, setError] = useState<string | null>(null);

  const alreadyLinkedIds = linked.map((j) => j.director_id);

  async function handleUnlink(junctionId: string, directorName: string) {
    if (!confirm(`Remove link to "${directorName}"? The director will remain in PocketBase.`)) return;
    setUnlinking(junctionId);
    setError(null);
    try {
      const res = await fetch("/api/pb/records/link", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          action: "unlink",
          company: companyId,
          director: linked.find((j) => j.id === junctionId)?.director_id,
        }),
      });
      if (!res.ok) {
        const err = await res.json();
        throw new Error(err.error ?? "Unlink failed");
      }
      setLinked((prev) => prev.filter((j) => j.id !== junctionId));
      window.location.reload();
    } catch (e: unknown) {
      setError(e instanceof Error ? e.message : "Unlink failed");
    } finally {
      setUnlinking(null);
    }
  }

  return (
    <>
      <div className="flex flex-col gap-3 min-w-0">
        <div className="flex items-baseline justify-between gap-3 flex-wrap">
          <h2 className="text-xl font-semibold text-fg">Linked directors</h2>
          <div className="flex items-center gap-3">
            <p className="text-sm text-muted">
              {linked.length} director{linked.length === 1 ? "" : "s"}
            </p>
            <button
              onClick={() => setShowLinkModal(true)}
              className="px-3 py-1.5 rounded-md bg-accent text-accent-on text-xs font-bold hover:bg-accent-hover transition-colors"
            >
              + Link director
            </button>
          </div>
        </div>

        {error && (
          <div className="px-4 py-2.5 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-sm">
            {error}
          </div>
        )}

        {linked.length === 0 ? (
          <div className="bg-surface border border-border rounded-lg p-10 text-center text-muted">
            No directors linked to this company.
          </div>
        ) : (
          <div className="flex flex-col gap-3">
            {linked.map((j) => {
              const d = j.director;
              const name = `${text(d.first_names)} ${text(d.surname)}`.trim();
              return (
                <div
                  key={j.id}
                  className="bg-surface border border-border rounded-lg p-6 md:p-8 flex flex-col gap-3 hover:bg-surface-warm transition-colors"
                >
                  <div className="flex flex-col sm:flex-row sm:items-start sm:justify-between gap-3">
                    <div className="min-w-0">
                      <p className="text-2xl font-bold text-fg leading-tight">{name || "—"}</p>
                      <p className="text-base text-muted font-mono mt-1">
                        ID {text(d.id_no)}
                      </p>
                    </div>
                    <button
                      onClick={() => handleUnlink(j.id, name)}
                      disabled={unlinking !== null}
                      title="Unlink director"
                      className="text-xs px-2.5 py-1 rounded border border-red-500/30 bg-red-500/10 text-red-400 hover:bg-red-500/20 transition-colors disabled:opacity-40 shrink-0"
                    >
                      {unlinking === j.id ? "…" : "Unlink"}
                    </button>
                  </div>
                  <Link
                    href={`/directors/${d.id}`}
                    className="text-xs font-semibold text-accent hover:underline self-start"
                  >
                    View director profile →
                  </Link>
                </div>
              );
            })}
          </div>
        )}
      </div>

      <LinkEntityModal
        mode="link-company"
        parentId={companyId}
        parentName={companyName}
        alreadyLinkedIds={alreadyLinkedIds}
        open={showLinkModal}
        onClose={() => setShowLinkModal(false)}
        onLinked={() => router.refresh()}
      />
    </>
  );
}