// components/ResolutionActions.tsx
// Phase 2B — action bar for the resolution detail page.
//
// Status-aware actions:
//   - draft             → Send for signature (disabled — Phase 6)
//   - draft             → Cancel (re-enables)
//   - pending_signatures → Cancel
//   - pending_signatures → Resend (uses existing /api/resolutions/[id]/resend)
//   - signed            → (no destructive actions; status is final)
//   - cancelled         → (locked — status is final)
//
// Cancel + Resend are wired to the existing endpoints (Phase 2A).
// "Send for signature" is disabled until Phase 6 lands.

"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import type { NewResolutionStatus } from "@/lib/types";

interface Props {
  resolutionId: string;
  status: NewResolutionStatus;
}

export default function ResolutionActions({ resolutionId, status }: Props) {
  const router = useRouter();
  const [acting, setActing] = useState<string | null>(null);
  const [feedback, setFeedback] = useState<{ kind: "ok" | "err"; msg: string } | null>(null);

  const canSendForSignature = status === "draft";
  const canCancel = status === "draft" || status === "pending_signatures";
  const canResend = status === "pending_signatures";

  const handleCancel = async () => {
    if (!confirm("Cancel this resolution? Pending signers will be marked expired.")) return;
    setActing("cancel");
    setFeedback(null);
    try {
      const res = await fetch(`/api/resolutions/${resolutionId}/cancel`, { method: "POST" });
      if (!res.ok) {
        const j = await res.json().catch(() => ({}));
        throw new Error(j.error || `HTTP ${res.status}`);
      }
      setFeedback({ kind: "ok", msg: "Resolution cancelled." });
      router.refresh();
    } catch (err) {
      setFeedback({ kind: "err", msg: err instanceof Error ? err.message : "Cancel failed" });
    } finally {
      setActing(null);
    }
  };

  const handleResend = async () => {
    setActing("resend");
    setFeedback(null);
    try {
      const res = await fetch(`/api/resolutions/${resolutionId}/resend`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({}),
      });
      if (!res.ok) {
        const j = await res.json().catch(() => ({}));
        throw new Error(j.error || `HTTP ${res.status}`);
      }
      const j = await res.json();
      setFeedback({ kind: "ok", msg: `Re-sent to ${j.resent} pending signer(s).` });
      router.refresh();
    } catch (err) {
      setFeedback({ kind: "err", msg: err instanceof Error ? err.message : "Resend failed" });
    } finally {
      setActing(null);
    }
  };

  const handleSendForSignature = async () => {
    setActing("send");
    setFeedback(null);
    try {
      const res = await fetch(`/api/resolutions/${resolutionId}/attendees`, {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ send_for_signature: true }),
      });
      const j = await res.json().catch(() => ({}));
      if (!res.ok) {
        throw new Error(j.error || `HTTP ${res.status}`);
      }
      const sentCount =
        j.emails_sent?.filter((e: { ok: boolean }) => e.ok).length ?? 0;
      const failCount =
        j.emails_sent?.filter((e: { ok: boolean }) => !e.ok).length ?? 0;
      const msg =
        `Sent for signature — ${j.signers_created} signers created` +
        (sentCount > 0 ? `, ${sentCount} emails sent` : "") +
        (failCount > 0 ? `, ${failCount} email(s) failed (see server logs)` : "");
      setFeedback({ kind: failCount > 0 ? "err" : "ok", msg });
      router.refresh();
    } catch (err) {
      setFeedback({
        kind: "err",
        msg: err instanceof Error ? err.message : "Send failed",
      });
    } finally {
      setActing(null);
    }
  };

  // No actions for terminal states
  if (status === "signed" || status === "cancelled") {
    return (
      <div className="bg-surface border border-border rounded-lg p-4 text-sm text-muted">
        Status is final — no actions available.
      </div>
    );
  }

  return (
    <div className="bg-surface border border-border rounded-lg p-4 space-y-3">
      <div className="flex flex-wrap items-center gap-3">
        {canSendForSignature && (
          <button
            onClick={handleSendForSignature}
            disabled={acting !== null}
            className="px-4 py-2 bg-accent text-accent-on rounded font-semibold text-sm hover:opacity-90 transition-opacity disabled:opacity-50 disabled:cursor-not-allowed"
          >
            {acting === "send" ? "Sending…" : "Send for signature"}
          </button>
        )}
        {canResend && (
          <button
            onClick={handleResend}
            disabled={acting !== null}
            className="px-4 py-2 bg-surface border border-border text-fg rounded font-semibold text-sm hover:bg-surface-warm transition-colors disabled:opacity-50"
          >
            {acting === "resend" ? "Resending…" : "Resend to signers"}
          </button>
        )}
        {canCancel && (
          <button
            onClick={handleCancel}
            disabled={acting !== null}
            className="px-4 py-2 bg-surface border border-danger/40 text-danger rounded font-semibold text-sm hover:bg-danger/5 transition-colors disabled:opacity-50"
          >
            {acting === "cancel" ? "Cancelling…" : "Cancel resolution"}
          </button>
        )}
      </div>

      {feedback && (
        <p className={`text-sm font-semibold ${feedback.kind === "ok" ? "text-success" : "text-danger"}`}>
          {feedback.msg}
        </p>
      )}
    </div>
  );
}