"use client";

// components/ClientToggle.tsx
// Toggles `is_client` on a director or company row.
//
// Optimistic: flips UI immediately, reverts and shows an inline
// error banner if the API call fails. Used both inline (row hover)
// and on the detail page (full button + label).

import { useState } from "react";
import { pbToggleClient } from "@/lib/api";

type Collection = "ysterbaard_directors" | "ysterbaard_companies";

interface Props {
  collection: Collection;
  id: string;
  isClient: boolean;
  /** "pill" hides the text label so it can sit inline in a row;
   *  "button" shows the label + on/off state. */
  variant?: "pill" | "button";
  /** Optional className passthrough. */
  className?: string;
  /** Called after a successful server-side toggle. Use to invalidate
   *  the surrounding query so PB truth is reflected. */
  onAfterToggle?: () => void;
}

export default function ClientToggle({
  collection,
  id,
  isClient,
  variant = "pill",
  className = "",
  onAfterToggle
}: Props) {
  const [optimistic, setOptimistic] = useState(isClient);
  const [busy, setBusy] = useState(false);
  const [error, setError] = useState<string | null>(null);

  // When the upstream `isClient` prop changes (e.g. after a refetch),
  // keep optimistic in sync.
  if (!busy && optimistic !== isClient) {
    setOptimistic(isClient);
  }

  async function toggle() {
    const next = !optimistic;
    // Confirm before making the change
    const confirmed = window.confirm(
      next
        ? "Mark this as a client?\n\nClick OK to confirm, Cancel to abort."
        : "Remove client status?\n\nClick OK to confirm, Cancel to abort."
    );
    if (!confirmed) return;

    setOptimistic(next);
    setBusy(true);
    setError(null);
    try {
      await pbToggleClient({
        collection,
        id,
        is_client: next
      });
      onAfterToggle?.();
    } catch (e) {
      // Revert and surface.
      setOptimistic(!next);
      setError(e instanceof Error ? e.message : "Toggle failed");
      // Auto-clear the inline error after a beat.
      setTimeout(() => setError(null), 5000);
    } finally {
      setBusy(false);
    }
  }

  if (variant === "button") {
    return (
      <div className={`flex flex-col gap-2 ${className}`}>
        <button
          type="button"
          role="switch"
          aria-checked={optimistic}
          onClick={toggle}
          disabled={busy}
          className={
            "inline-flex items-center gap-3 px-4 py-2.5 rounded-md border text-sm font-semibold transition-colors disabled:opacity-60 disabled:cursor-not-allowed " +
            (optimistic
              ? "bg-[color-mix(in_oklch,var(--accent)_15%,white)] text-[color:var(--accent)] border-[color:var(--accent)]/45 hover:bg-[color-mix(in_oklch,var(--accent)_22%,white)]"
              : "bg-surface text-fg border-border hover:bg-surface-warm")
          }
        >
          <span
            aria-hidden="true"
            className={
              "w-9 h-5 rounded-pill relative transition-colors " +
              (optimistic ? "bg-[color:var(--accent)]" : "bg-border")
            }
          >
            <span
              className={
                "absolute top-0.5 w-4 h-4 rounded-pill bg-white shadow transition-transform " +
                (optimistic ? "translate-x-[18px]" : "translate-x-0.5")
              }
            />
          </span>
          <span>{optimistic ? "Active client" : "Mark as client"}</span>
        </button>
        {error ? (
          <p className="text-xs text-[color:var(--danger)]" role="alert">
            {error}
          </p>
        ) : null}
      </div>
    );
  }

  // pill (row-inline) variant
  return (
    <span className={`inline-flex items-center gap-2 ${className}`}>
      <button
        type="button"
        role="switch"
        aria-checked={optimistic}
        title={optimistic ? "Active client — click to remove" : "Click to mark as a client"}
        onClick={toggle}
        disabled={busy}
        className={
          "inline-flex items-center gap-1.5 px-2.5 py-1 rounded-pill border text-xs font-semibold whitespace-nowrap transition-colors disabled:opacity-60 disabled:cursor-not-allowed " +
          (optimistic
            ? "bg-[color-mix(in_oklch,var(--accent)_15%,white)] text-[color:var(--accent)] border-[color:var(--accent)]/45 hover:bg-[color-mix(in_oklch,var(--accent)_22%,white)]"
            : "bg-surface-warm text-muted border-border hover:bg-surface hover:text-fg")
        }
      >
        <span
          aria-hidden="true"
          className="w-1.5 h-1.5 rounded-pill"
          style={{ backgroundColor: "currentColor" }}
        />
        {optimistic ? "Client" : "Make client"}
      </button>
      {error ? (
        <span className="text-xs text-[color:var(--danger)]" role="alert">
          ⚠ {error}
        </span>
      ) : null}
    </span>
  );
}