'use client';

import { useEffect, useMemo, useState } from 'react';
import JobsTable from '@/components/JobsTable';
import { TopBar, MainContent } from '@/components/layout';
import Link from 'next/link';
import { useAuth } from '@/contexts/AuthContext';
import HFLoginButton from '@/components/HFLoginButton';
import useSettings from '@/hooks/useSettings';
import { apiClient } from '@/utils/api';

export default function Dashboard() {
  const { status: authStatus, namespace, token: authToken } = useAuth();
  const { settings } = useSettings();
  const isAuthenticated = authStatus === 'authenticated';
  const effectiveToken = useMemo(() => authToken || settings.HF_TOKEN, [authToken, settings.HF_TOKEN]);

  type OrgStatus = 'idle' | 'checking' | 'member' | 'missing' | 'error';
  const [orgStatus, setOrgStatus] = useState<OrgStatus>('idle');

  useEffect(() => {
    if (!isAuthenticated) {
      setOrgStatus('idle');
      return;
    }

    if (!effectiveToken) {
      setOrgStatus('idle');
      return;
    }

    let cancelled = false;
    setOrgStatus('checking');

    apiClient
      .post('/api/hf-hub', {
        action: 'whoami',
        token: effectiveToken,
      })
      .then(response => {
        if (cancelled) return;
        const orgsRaw = response.data?.user?.orgs ?? response.data?.user?.organizations ?? [];
        const REQUIRED_ORG = 'lora-training-frenzi';
        const isMember = Array.isArray(orgsRaw)
          ? orgsRaw.some((org: any) => {
              if (!org) return false;
              if (typeof org === 'string') {
                return org === REQUIRED_ORG;
              }
              const nameMatch = org?.name || org?.organization || org?.namespace || org?.id;
              return nameMatch === REQUIRED_ORG;
            })
          : false;
        setOrgStatus(isMember ? 'member' : 'missing');
      })
      .catch(() => {
        if (!cancelled) {
          setOrgStatus('error');
        }
      });

    return () => {
      cancelled = true;
    };
  }, [effectiveToken, isAuthenticated]);

  return (
    <>
      <TopBar>
        <div>
          <h1 className="text-lg">Dashboard</h1>
        </div>
        <div className="flex-1" />
      </TopBar>
      <MainContent>
        <div className="mb-6">
          <img
            src="https://huggingface.co/spaces/multimodalart/ai-toolkit/resolve/main/lora_frenzi.png"
            alt="LoRA Frenzi event banner"
            className="w-full rounded-lg border border-gray-800"
          />
        </div>
        <div className="border border-gray-800 rounded-xl bg-gray-900 p-6 flex flex-col gap-4">
          <div>
            <h2 className="text-xl font-semibold text-gray-100">
              {isAuthenticated ? `Welcome back, ${namespace || 'creator'}!` : 'Welcome to Ostris AI Toolkit'}
            </h2>
            <p className="text-sm text-gray-400 mt-2">
              {isAuthenticated
                ? 'You are signed in with Hugging Face and can manage jobs, datasets, and submissions.'
                : 'Authenticate with Hugging Face or add a personal access token to create jobs, upload datasets, and launch training.'}
            </p>
          </div>
          {isAuthenticated ? (
            <div className="flex flex-col gap-4 text-sm">
              {orgStatus === 'checking' && (
                <div className="text-xs text-gray-400">Checking your LoRA Frenzi membership…</div>
              )}
              {orgStatus === 'missing' && (
                <div className="border border-yellow-700 bg-yellow-900/20 text-yellow-100 rounded-lg p-4 space-y-2">
                  <p className="font-semibold">LoRA Frenzi reminder</p>
                  <p>
                    Your didn't authorize the <code className="bg-yellow-800/50 px-1 rounded">lora-training-frenzi</code> organization in your login.
                    To participate:
                  </p>
                  <ol className="list-decimal list-inside space-y-1 text-sm">
                    <li>
                      Join the{' '}
                      <a
                        href="https://huggingface.co/organizations/lora-training-frenzi/share/kEyyVNQXBPWqmARdwHFVdIiFqqONHZPOtz"
                        target="_blank"
                        rel="noopener noreferrer"
                        className="text-blue-200 underline"
                      >
                        LoRA Frenzi organization
                      </a>
                      . (if you haven't already)
                    </li>
                    <li>
                      Remove the “Ostris AI Toolkit” app from{' '}
                      <a
                        href="https://huggingface.co/settings/connected-applications"
                        target="_blank"
                        rel="noopener noreferrer"
                        className="text-blue-200 underline"
                      >
                        Hugging Face &gt; Connected Applications
                      </a>
                      .
                    </li>
                    <li>Come back here and sign in again authorizing the lora-training-frenzi organization so we can refresh your permissions.</li>
                  </ol>
                </div>
              )}
              {orgStatus === 'error' && (
                <div className="border border-red-700 bg-red-900/20 text-red-100 rounded-lg p-4 text-sm">
                  We couldn&apos;t verify your organization membership right now. You can retry later or ensure your token is valid.
                </div>
              )}
              <div className="flex flex-wrap items-center gap-3">
                <Link
                  href="/jobs/new"
                  className="px-4 py-2 rounded-md bg-blue-600 hover:bg-blue-500 text-white transition-colors"
                >
                  Create a Training Job
                </Link>
                <Link
                  href="/datasets"
                  className="px-4 py-2 rounded-md bg-gray-800 hover:bg-gray-700 text-gray-200 transition-colors"
                >
                  Manage Datasets
                </Link>
                <Link
                  href="/settings"
                  className="px-4 py-2 rounded-md border border-gray-700 text-gray-300 hover:border-gray-600 transition-colors"
                >
                  Settings
                </Link>
              </div>
            </div>
          ) : (
            <div className="flex flex-col gap-4 text-sm text-gray-300">
              <ol className="list-decimal list-inside space-y-4">
                <li>
                  Join the{' '}
                  <a
                    href="https://huggingface.co/organizations/lora-training-frenzi/share/kEyyVNQXBPWqmARdwHFVdIiFqqONHZPOtz"
                    target="_blank"
                    rel="noopener noreferrer"
                    className="text-blue-400 underline"
                  >
                    LoRA Frenzi organization
                  </a>{' '}
                  first, then authorize the <code className="bg-gray-800 px-1 rounded">lorafrenzi</code> org when prompted.
                  <img
                    src="https://huggingface.co/spaces/multimodalart/ai-toolkit/resolve/main/add_org_to_oauth.png"
                    alt="Authorize lorafrenzi organization"
                    className="mt-3 max-w-sm rounded border border-gray-800"
                  />
                </li>
                <li>
                  <HFLoginButton size="md" />
                </li>
              </ol>
              <Link
                href="/settings"
                className="text-xs text-blue-400 hover:text-blue-300"
              >
                Or manage tokens in Settings
              </Link>
            </div>
          )}
        </div>

        <div className="w-full mt-6">
          <div className="flex justify-between items-center mb-2">
            <h1 className="text-md">Active Jobs</h1>
            <div className="text-xs text-gray-500">
              <Link href="/jobs">View All</Link>
            </div>
          </div>
          {isAuthenticated ? (
            <JobsTable onlyActive />
          ) : (
            <div className="border border-gray-800 rounded-lg p-6 bg-gray-900 text-gray-400 text-sm">
              Sign in with Hugging Face or add an access token in Settings to view and manage jobs.
            </div>
          )}
        </div>
      </MainContent>
    </>
  );
}
