import { useEffect, useState } from 'react';
import { toast } from './ui/sonner';
import { isFavorite } from '../utils/favorites';
import { handleKeyboardActivate } from '../utils/a11y';
import { ContactAvatar } from './ContactAvatar';
import { ContactStatusInfo } from './ContactStatusInfo';
import type { Channel, Contact, Conversation, Favorite, RadioConfig } from '../types';

interface ChatHeaderProps {
  conversation: Conversation;
  contacts: Contact[];
  channels: Channel[];
  config: RadioConfig | null;
  favorites: Favorite[];
  onTrace: () => void;
  onToggleFavorite: (type: 'channel' | 'contact', id: string) => void;
  onSetChannelFloodScopeOverride?: (key: string, floodScopeOverride: string) => void;
  onDeleteChannel: (key: string) => void;
  onDeleteContact: (publicKey: string) => void;
  onOpenContactInfo?: (publicKey: string) => void;
  onOpenChannelInfo?: (channelKey: string) => void;
}

export function ChatHeader({
  conversation,
  contacts,
  channels,
  config,
  favorites,
  onTrace,
  onToggleFavorite,
  onSetChannelFloodScopeOverride,
  onDeleteChannel,
  onDeleteContact,
  onOpenContactInfo,
  onOpenChannelInfo,
}: ChatHeaderProps) {
  const [showKey, setShowKey] = useState(false);

  useEffect(() => {
    setShowKey(false);
  }, [conversation.id]);

  const activeChannel =
    conversation.type === 'channel'
      ? channels.find((channel) => channel.key === conversation.id)
      : undefined;
  const isPrivateChannel = conversation.type === 'channel' && !activeChannel?.is_hashtag;

  const titleClickable =
    (conversation.type === 'contact' && onOpenContactInfo) ||
    (conversation.type === 'channel' && onOpenChannelInfo);

  const handleEditFloodScopeOverride = () => {
    if (conversation.type !== 'channel' || !onSetChannelFloodScopeOverride) return;
    const nextValue = window.prompt(
      'Enter regional override flood scope for this room. This temporarily changes the radio flood scope before send and restores it after, which significantly slows room sends. Leave blank to clear.',
      activeChannel?.flood_scope_override ?? ''
    );
    if (nextValue === null) return;
    onSetChannelFloodScopeOverride(conversation.id, nextValue);
  };

  return (
    <header className="flex justify-between items-center px-4 py-2.5 border-b border-border gap-2">
      <span className="flex flex-wrap items-baseline gap-x-2 min-w-0 flex-1">
        {conversation.type === 'contact' && onOpenContactInfo && (
          <span
            className="flex-shrink-0 cursor-pointer"
            role="button"
            tabIndex={0}
            onKeyDown={handleKeyboardActivate}
            onClick={() => onOpenContactInfo(conversation.id)}
            title="View contact info"
            aria-label={`View info for ${conversation.name}`}
          >
            <ContactAvatar
              name={conversation.name}
              publicKey={conversation.id}
              size={28}
              contactType={contacts.find((c) => c.public_key === conversation.id)?.type}
              clickable
            />
          </span>
        )}
        <h2
          className={`flex-shrink-0 font-semibold text-base ${titleClickable ? 'cursor-pointer hover:text-primary transition-colors' : ''}`}
          role={titleClickable ? 'button' : undefined}
          tabIndex={titleClickable ? 0 : undefined}
          aria-label={titleClickable ? `View info for ${conversation.name}` : undefined}
          onKeyDown={titleClickable ? handleKeyboardActivate : undefined}
          onClick={
            titleClickable
              ? () => {
                  if (conversation.type === 'contact' && onOpenContactInfo) {
                    onOpenContactInfo(conversation.id);
                  } else if (conversation.type === 'channel' && onOpenChannelInfo) {
                    onOpenChannelInfo(conversation.id);
                  }
                }
              : undefined
          }
        >
          {conversation.type === 'channel' &&
          !conversation.name.startsWith('#') &&
          activeChannel?.is_hashtag
            ? '#'
            : ''}
          {conversation.name}
        </h2>
        {isPrivateChannel && !showKey ? (
          <button
            className="font-normal text-[11px] text-muted-foreground font-mono hover:text-primary transition-colors"
            onClick={(e) => {
              e.stopPropagation();
              setShowKey(true);
            }}
            title="Reveal channel key"
          >
            Show Key
          </button>
        ) : (
          <span
            className="font-normal text-[11px] text-muted-foreground font-mono truncate cursor-pointer hover:text-primary transition-colors"
            role="button"
            tabIndex={0}
            onKeyDown={handleKeyboardActivate}
            onClick={(e) => {
              e.stopPropagation();
              navigator.clipboard.writeText(conversation.id);
              toast.success(
                conversation.type === 'channel' ? 'Room key copied!' : 'Contact key copied!'
              );
            }}
            title="Click to copy"
            aria-label={conversation.type === 'channel' ? 'Copy channel key' : 'Copy contact key'}
          >
            {conversation.type === 'channel' ? conversation.id.toLowerCase() : conversation.id}
          </span>
        )}
          {conversation.type === 'channel' && activeChannel?.flood_scope_override && (
            <span className="basis-full sm:basis-auto text-[11px] text-amber-700 dark:text-amber-300 truncate">
              Regional override active: {activeChannel.flood_scope_override}
            </span>
          )}
        {conversation.type === 'contact' &&
          (() => {
            const contact = contacts.find((c) => c.public_key === conversation.id);
            if (!contact) return null;
            return (
              <ContactStatusInfo
                contact={contact}
                ourLat={config?.lat ?? null}
                ourLon={config?.lon ?? null}
              />
            );
          })()}
      </span>
      <div className="flex items-center gap-0.5 flex-shrink-0">
        {conversation.type === 'contact' && (
          <button
            className="p-1.5 rounded hover:bg-accent text-lg leading-none transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
            onClick={onTrace}
            title="Direct Trace"
            aria-label="Direct Trace"
          >
            <span aria-hidden="true">&#x1F6CE;</span>
          </button>
        )}
        {conversation.type === 'channel' && onSetChannelFloodScopeOverride && (
          <button
            className="p-1.5 rounded hover:bg-accent text-lg leading-none transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
            onClick={handleEditFloodScopeOverride}
            title="Set regional override"
            aria-label="Set regional override"
          >
            <span aria-hidden="true">&#127758;</span>
          </button>
        )}
        {(conversation.type === 'channel' || conversation.type === 'contact') && (
          <button
            className="p-1.5 rounded hover:bg-accent text-lg leading-none transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
            onClick={() =>
              onToggleFavorite(conversation.type as 'channel' | 'contact', conversation.id)
            }
            title={
              isFavorite(favorites, conversation.type as 'channel' | 'contact', conversation.id)
                ? 'Remove from favorites'
                : 'Add to favorites'
            }
            aria-label={
              isFavorite(favorites, conversation.type as 'channel' | 'contact', conversation.id)
                ? 'Remove from favorites'
                : 'Add to favorites'
            }
          >
            {isFavorite(favorites, conversation.type as 'channel' | 'contact', conversation.id) ? (
              <span className="text-favorite">&#9733;</span>
            ) : (
              <span className="text-muted-foreground">&#9734;</span>
            )}
          </button>
        )}
        {!(conversation.type === 'channel' && conversation.name === 'Public') && (
          <button
            className="p-1.5 rounded hover:bg-destructive/10 text-muted-foreground hover:text-destructive text-lg leading-none transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
            onClick={() => {
              if (conversation.type === 'channel') {
                onDeleteChannel(conversation.id);
              } else {
                onDeleteContact(conversation.id);
              }
            }}
            title="Delete"
            aria-label="Delete"
          >
            <span aria-hidden="true">&#128465;</span>
          </button>
        )}
      </div>
    </header>
  );
}