"use client";

import { useState } from "react";
import Link from "next/link";
import { UserAvatar } from "@/components/user-avatar";
import { ThoughtList } from "@/components/thought-list";
import { Card } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { ExternalLink, UserPlus, UserMinus } from "lucide-react";
import { followUser, unfollowUser, RemoteActor, Thought, Me } from "@/lib/api";
import { toast } from "sonner";
import { useAuth } from "@/hooks/use-auth";

interface RemoteUserProfileProps {
  actor: RemoteActor;
  initialPosts: Thought[];
  me: Me | null;
}

export function RemoteUserProfile({
  actor,
  initialPosts,
  me,
}: RemoteUserProfileProps) {
  const [followed, setFollowed] = useState(false);
  const [loading, setLoading] = useState(false);
  const { token } = useAuth();

  const handleFollow = async () => {
    if (!token) {
      toast.error("You must be logged in to follow users.");
      return;
    }
    setLoading(true);
    try {
      if (followed) {
        await unfollowUser(actor.handle, token);
        setFollowed(false);
      } else {
        await followUser(actor.handle, token);
        setFollowed(true);
        toast.success(`Follow request sent to ${actor.handle}`);
      }
    } catch {
      toast.error(
        followed ? "Failed to unfollow." : "Failed to send follow request.",
      );
    } finally {
      setLoading(false);
    }
  };

  const isOwnProfile = me?.username === actor.handle;

  const authorDetails = new Map<string, { avatarUrl?: string | null }>();
  initialPosts.forEach((t) => {
    authorDetails.set(t.author.username, { avatarUrl: actor.avatarUrl });
  });

  return (
    <div>
      <div
        className="h-48 bg-muted bg-cover bg-center"
        style={{
          backgroundImage: actor.bannerUrl ? `url(${actor.bannerUrl})` : "none",
        }}
      />

      <main className="container mx-auto max-w-6xl p-4 -mt-16 grid grid-cols-1 lg:grid-cols-4 gap-8">
        <aside className="col-span-1 space-y-6">
          <div className="sticky top-20 space-y-6">
            <Card className="p-6 bg-card/80 backdrop-blur-lg">
              <div className="flex justify-between items-start">
                <div className="w-24 h-24 rounded-full border-4 border-background shrink-0">
                  <UserAvatar
                    src={actor.avatarUrl}
                    alt={actor.displayName}
                    className="w-full h-full"
                  />
                </div>
                {!isOwnProfile && token && (
                  <Button
                    onClick={handleFollow}
                    disabled={loading}
                    variant={followed ? "secondary" : "default"}
                    size="sm"
                  >
                    {followed ? (
                      <>
                        <UserMinus className="mr-2 h-4 w-4" /> Unfollow
                      </>
                    ) : (
                      <>
                        <UserPlus className="mr-2 h-4 w-4" /> Follow
                      </>
                    )}
                  </Button>
                )}
              </div>

              <div className="mt-4 min-w-0">
                <h1 className="text-2xl font-bold truncate">
                  {actor.displayName ?? actor.handle}
                </h1>
                <p className="text-sm text-muted-foreground truncate">
                  {actor.handle}
                </p>
              </div>

              {actor.bio && (
                <div
                  className="mt-4 text-sm [&_a]:underline [&_a]:text-primary [&_p]:mb-2"
                  dangerouslySetInnerHTML={{ __html: actor.bio }}
                />
              )}

              <Button
                asChild
                variant="outline"
                size="sm"
                className="mt-4 w-full"
              >
                <Link
                  href={actor.url}
                  target="_blank"
                  rel="noopener noreferrer"
                  className="flex items-center overflow-hidden"
                >
                  <ExternalLink className="mr-2 h-4 w-4 shrink-0" />
                  <span className="truncate">
                    {new URL(actor.url).hostname}
                  </span>
                </Link>
              </Button>

              {(actor.followersUrl || actor.followingUrl) && (
                <div className="mt-3 flex gap-3 text-sm">
                  {actor.followersUrl && (
                    <Link
                      href={actor.followersUrl}
                      target="_blank"
                      rel="noopener noreferrer"
                      className="text-muted-foreground hover:text-foreground hover:underline"
                    >
                      Followers
                    </Link>
                  )}
                  {actor.followingUrl && (
                    <Link
                      href={actor.followingUrl}
                      target="_blank"
                      rel="noopener noreferrer"
                      className="text-muted-foreground hover:text-foreground hover:underline"
                    >
                      Following
                    </Link>
                  )}
                </div>
              )}

              {actor.alsoKnownAs && (
                <p className="mt-2 text-xs text-muted-foreground">
                  Also known as:{" "}
                  <Link
                    href={actor.alsoKnownAs}
                    target="_blank"
                    rel="noopener noreferrer"
                    className="underline"
                  >
                    {actor.alsoKnownAs}
                  </Link>
                </p>
              )}

              {actor.attachment.length > 0 && (
                <div className="mt-4 space-y-0 text-sm">
                  {actor.attachment.map((field) => (
                    <div
                      key={field.name}
                      className="grid grid-cols-[minmax(0,5rem)_1fr] gap-2 border-t py-1"
                    >
                      <span className="font-medium text-muted-foreground truncate" title={field.name}>
                        {field.name}
                      </span>
                      <span
                        className="break-all min-w-0 [&_a]:underline [&_a]:text-primary"
                        dangerouslySetInnerHTML={{ __html: field.value }}
                      />
                    </div>
                  ))}
                </div>
              )}
            </Card>
          </div>
        </aside>

        <div className="col-span-1 lg:col-span-3 space-y-4">
          {initialPosts.length > 0 ? (
            <ThoughtList
              thoughts={initialPosts}
              authorDetails={authorDetails}
              currentUser={me}
            />
          ) : (
            <Card className="flex items-center justify-center h-48">
              <p className="text-center text-muted-foreground">
                Posts are being fetched — check back soon.
              </p>
            </Card>
          )}
        </div>
      </main>
    </div>
  );
}