'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="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. Train LoRAs at $0.042/minute if you are a PRO user.'
                : 'Authenticate with Hugging Face or add a personal access token to create jobs, upload datasets, and launch training. Train LoRAs at $0.042/minute if you are a PRO user.'}
              {!isAuthenticated && (
                <>
                  {' '}
                  <a
                    href="https://huggingface.co/subscribe/pro"
                    target="_blank"
                    rel="noopener noreferrer"
                    className="text-blue-400 underline hover:text-blue-300"
                  >
                    Subscribe to PRO
                  </a>
                </>
              )}
            </p>
          </div>
          {isAuthenticated ? (
            <div className="flex flex-col gap-4 text-sm">
              <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">
              <div>
                <HFLoginButton size="md" />
              </div>
              <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>
    </>
  );
}