"use client";

/**
 * The relationship block on a chat profile: how long you've been connected,
 * which way the follow runs, mute, and blocking.
 *
 * One-way follows are stated plainly rather than collapsed into "friends" —
 * "they follow you" and "you follow each other" are different facts, and the
 * profile is where someone goes to check exactly that.
 *
 * Centred, to sit under the avatar and name above it — which are centred too.
 */

import { useState } from "react";
import { BellOff, Bell, ShieldBan, ShieldCheck } from "lucide-react";
import { toast } from "sonner";
import { Button } from "@/components/ui/button";
import { relationships } from "@/lib/social";
import {
  chat,
  followSummary,
  isMuted,
  type ConversationDetail,
  type MuteDuration,
} from "@/lib/chat";

function friendsSinceLabel(iso?: string | null): string | null {
  if (!iso) return null;
  const d = new Date(iso);
  if (Number.isNaN(d.getTime())) return null;
  return `Connected since ${d.toLocaleDateString(undefined, {
    month: "long",
    year: "numeric",
  })}`;
}

export function ChatProfileHeader({
  conversationId,
  detail,
  onChanged,
}: {
  conversationId: string;
  detail: ConversationDetail;
  onChanged: () => void;
}) {
  const [busy, setBusy] = useState(false);
  const rel = detail.relationship;
  const peer = detail.peer;
  const muted = isMuted(detail);

  const setMute = async (duration: MuteDuration) => {
    setBusy(true);
    try {
      await chat.setMute(conversationId, duration);
      toast.success(duration === "off" ? "Chat unmuted" : "Chat muted");
      onChanged();
    } catch {
      toast.error("Could not change mute settings");
    } finally {
      setBusy(false);
    }
  };

  const toggleBlock = async () => {
    if (!peer) return;
    const blocking = !rel?.blocked;
    if (blocking && !window.confirm(`Block ${peer.name}? They won't be able to message you.`)) {
      return;
    }
    setBusy(true);
    try {
      if (blocking) await relationships.block(peer.handle);
      else await relationships.unblock(peer.handle);
      toast.success(blocking ? `Blocked ${peer.name}` : `Unblocked ${peer.name}`);
      onChanged();
    } catch {
      toast.error("Could not update block settings");
    } finally {
      setBusy(false);
    }
  };

  return (
    <div className="space-y-4 p-4">
      {peer && rel && (
        <div className="space-y-1 text-center text-sm">
          <p className="text-foreground">{followSummary(rel, peer.name)}</p>
          {friendsSinceLabel(rel.friends_since) && (
            <p className="text-muted-foreground">
              {friendsSinceLabel(rel.friends_since)}
            </p>
          )}
          {rel.blocked_by && (
            <p className="text-muted-foreground">
              {peer.name} has blocked you.
            </p>
          )}
        </div>
      )}

      <div className="flex flex-wrap justify-center gap-2">
        {muted ? (
          <Button
            variant="outline"
            size="sm"
            disabled={busy}
            onClick={() => setMute("off")}
          >
            <Bell className="size-4" /> Unmute
          </Button>
        ) : (
          <>
            <Button
              variant="outline"
              size="sm"
              disabled={busy}
              onClick={() => setMute("8h")}
            >
              <BellOff className="size-4" /> Mute 8h
            </Button>
            <Button
              variant="outline"
              size="sm"
              disabled={busy}
              onClick={() => setMute("always")}
            >
              Mute always
            </Button>
          </>
        )}

        {peer && (
          <Button
            variant={rel?.blocked ? "outline" : "destructive"}
            size="sm"
            disabled={busy}
            onClick={toggleBlock}
          >
            {rel?.blocked ? (
              <>
                <ShieldCheck className="size-4" /> Unblock
              </>
            ) : (
              <>
                <ShieldBan className="size-4" /> Block
              </>
            )}
          </Button>
        )}
      </div>
    </div>
  );
}