'use client';

import { useEffect, useState } from 'react';

export interface AiModelInfo {
  id: string;
  name: string;
  description: string;
  model: string;
  path: string;
  trigger: string;
  access: string;
}

const STORAGE_KEY = 'mistral_api_key_meta';

interface KeyMeta {
  createdAt: string;
  validityMonths: string;
}

interface Props {
  keyHint: string;
  hasKey: boolean;
  aiFunctions: AiModelInfo[];
}

export default function AiAdminClient({ keyHint, hasKey, aiFunctions }: Props) {
  const [meta, setMeta] = useState<KeyMeta>({ createdAt: '', validityMonths: '' });

  useEffect(() => {
    try {
      const stored = localStorage.getItem(STORAGE_KEY);
      if (stored) setMeta(JSON.parse(stored));
    } catch {
      // ignore
    }
  }, []);

  const saveMeta = (patch: Partial<KeyMeta>) => {
    const updated = { ...meta, ...patch };
    setMeta(updated);
    try {
      localStorage.setItem(STORAGE_KEY, JSON.stringify(updated));
    } catch {
      // ignore
    }
  };

  const { daysLeft, expiryDate } = computeExpiry(meta.createdAt, meta.validityMonths);

  const modelChip = (model: string) => {
    const color = model.includes('tiny') ? '#6366f1' : '#0ea5e9';
    return (
      <span style={{ fontSize: '0.78rem', background: color, color: '#fff', borderRadius: '4px', padding: '2px 7px', fontFamily: 'monospace', whiteSpace: 'nowrap' }}>
        {model}
      </span>
    );
  };

  const accessChip = (access: string) => {
    const isAdmin = access === 'Admin';
    const isPremium = access.includes('Premium');
    const bg = isAdmin ? '#7c3aed' : isPremium ? '#f59e0b' : '#10b981';
    return (
      <span style={{ fontSize: '0.75rem', background: bg, color: '#fff', borderRadius: '4px', padding: '2px 7px', whiteSpace: 'nowrap' }}>
        {access}
      </span>
    );
  };

  return (
    <div>
      {/* API-nyckel */}
      <section style={{ background: '#fff', border: '1px solid #e5e7eb', borderRadius: '10px', padding: '1.5rem', marginBottom: '2rem' }}>
        <h2 style={{ fontSize: '1.05rem', marginBottom: '1rem', display: 'flex', alignItems: 'center', gap: '0.5rem' }}>
          🔑 Mistral API-nyckel
        </h2>
        {!hasKey && (
          <div style={{ background: '#fef2f2', border: '1px solid #fecaca', borderRadius: '8px', padding: '0.75rem 1rem', marginBottom: '1rem', fontSize: '0.9rem', color: '#991b1b' }}>
            ⚠️ <strong>MISTRAL_API_KEY är inte konfigurerad</strong> — alla AI-funktioner är inaktiva tills nyckeln sätts i miljövariablerna.
          </div>
        )}
        {hasKey && (
          <div style={{ background: '#fffbeb', border: '1px solid #fde68a', borderRadius: '8px', padding: '0.75rem 1rem', marginBottom: '1rem', fontSize: '0.85rem', color: '#92400e' }}>
            ℹ️ Status <strong>Konfigurerad</strong> innebär att API-nyckeln är satt. Om Mistral svarar med 503 är det ett tillfälligt serverfel hos Mistral — inte ett konfigurationsproblem.
          </div>
        )}
        <div style={{ display: 'grid', gridTemplateColumns: 'auto 1fr', gap: '0.5rem 1.5rem', alignItems: 'center', marginBottom: '1.25rem' }}>
          <span style={{ color: '#555', fontSize: '0.9rem' }}>Status</span>
          <span>
            {hasKey
              ? <span style={{ color: '#10b981', fontWeight: 600 }}>✓ Konfigurerad</span>
              : <span style={{ color: '#ef4444', fontWeight: 600 }}>✗ Saknas (MISTRAL_API_KEY ej satt)</span>}
          </span>
          <span style={{ color: '#555', fontSize: '0.9rem' }}>Nyckel (sista 4)</span>
          <code style={{ fontFamily: 'monospace', fontSize: '1rem', letterSpacing: '0.15em', background: '#f3f4f6', padding: '2px 8px', borderRadius: '4px' }}>
            ****{keyHint}
          </code>
        </div>

        <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr 1fr', gap: '1rem', alignItems: 'end' }}>
          <label style={{ display: 'flex', flexDirection: 'column', gap: '0.3rem', fontSize: '0.85rem', color: '#374151' }}>
            Skapad datum
            <input
              type="date"
              value={meta.createdAt}
              onChange={(e) => saveMeta({ createdAt: e.target.value })}
              style={{ padding: '0.4rem 0.6rem', border: '1px solid #d1d5db', borderRadius: '6px', fontSize: '0.9rem' }}
            />
          </label>
          <label style={{ display: 'flex', flexDirection: 'column', gap: '0.3rem', fontSize: '0.85rem', color: '#374151' }}>
            Giltighet (månader)
            <input
              type="number"
              min="1"
              max="120"
              value={meta.validityMonths}
              onChange={(e) => saveMeta({ validityMonths: e.target.value })}
              placeholder="t.ex. 12"
              style={{ padding: '0.4rem 0.6rem', border: '1px solid #d1d5db', borderRadius: '6px', fontSize: '0.9rem' }}
            />
          </label>
          <div style={{ paddingBottom: '2px' }}>
            {expiryDate && daysLeft !== null ? (
              <div style={{ background: daysLeft <= 14 ? '#fef2f2' : daysLeft <= 30 ? '#fffbeb' : '#f0fdf4', border: `1px solid ${daysLeft <= 14 ? '#fecaca' : daysLeft <= 30 ? '#fde68a' : '#bbf7d0'}`, borderRadius: '8px', padding: '0.6rem 0.9rem' }}>
                <div style={{ fontSize: '0.75rem', color: '#6b7280', marginBottom: '2px' }}>Förfaller {expiryDate}</div>
                <div style={{ fontWeight: 700, fontSize: '1.1rem', color: daysLeft <= 14 ? '#dc2626' : daysLeft <= 30 ? '#d97706' : '#16a34a' }}>
                  {daysLeft <= 0 ? '⚠️ Nyckel har förfallit!' : `${daysLeft} dagar kvar`}
                </div>
              </div>
            ) : (
              <div style={{ color: '#9ca3af', fontSize: '0.85rem', padding: '0.6rem 0' }}>
                Fyll i datum och giltighet för att se återstående tid
              </div>
            )}
          </div>
        </div>
      </section>

      {/* AI-funktioner */}
      <section style={{ background: '#fff', border: '1px solid #e5e7eb', borderRadius: '10px', padding: '1.5rem' }}>
        <h2 style={{ fontSize: '1.05rem', marginBottom: '1rem' }}>✨ Implementerade AI-funktioner</h2>
        <div style={{ overflowX: 'auto' }}>
          <table style={{ width: '100%', borderCollapse: 'collapse', fontSize: '0.88rem' }}>
            <thead>
              <tr style={{ borderBottom: '2px solid #e5e7eb', textAlign: 'left' }}>
                <th style={{ padding: '0.5rem 0.75rem', color: '#374151', fontWeight: 600 }}>Status</th>
                <th style={{ padding: '0.5rem 0.75rem', color: '#374151', fontWeight: 600 }}>Funktion</th>
                <th style={{ padding: '0.5rem 0.75rem', color: '#374151', fontWeight: 600 }}>Modell</th>
                <th style={{ padding: '0.5rem 0.75rem', color: '#374151', fontWeight: 600 }}>Åtkomst</th>
                <th style={{ padding: '0.5rem 0.75rem', color: '#374151', fontWeight: 600 }}>Utlösare</th>
                <th style={{ padding: '0.5rem 0.75rem', color: '#374151', fontWeight: 600 }}>Sida</th>
              </tr>
            </thead>
            <tbody>
              {aiFunctions.map((fn, i) => (
                <tr key={i} style={{ borderBottom: '1px solid #f3f4f6', verticalAlign: 'top', opacity: hasKey ? 1 : 0.55 }}>
                  <td style={{ padding: '0.65rem 0.75rem', whiteSpace: 'nowrap' }}>
                    {hasKey ? (
                      <span title="API-nyckel konfigurerad" style={{ display: 'inline-flex', alignItems: 'center', gap: '0.3rem', fontSize: '0.78rem', background: '#dcfce7', color: '#166534', border: '1px solid #bbf7d0', borderRadius: '4px', padding: '2px 7px' }}>
                        ✓ Konfigurerad
                      </span>
                    ) : (
                      <span title="MISTRAL_API_KEY saknas" style={{ display: 'inline-flex', alignItems: 'center', gap: '0.3rem', fontSize: '0.78rem', background: '#fef2f2', color: '#991b1b', border: '1px solid #fecaca', borderRadius: '4px', padding: '2px 7px' }}>
                        ✗ Inaktiv
                      </span>
                    )}
                  </td>
                  <td style={{ padding: '0.65rem 0.75rem' }}>
                    <div style={{ fontWeight: 500, marginBottom: '0.2rem' }}>{fn.name}</div>
                    <div style={{ color: '#6b7280', fontSize: '0.8rem', lineHeight: 1.4 }}>{fn.description}</div>
                  </td>
                  <td style={{ padding: '0.65rem 0.75rem' }}>{modelChip(fn.model)}</td>
                  <td style={{ padding: '0.65rem 0.75rem' }}>{accessChip(fn.access)}</td>
                  <td style={{ padding: '0.65rem 0.75rem', color: '#4b5563', fontSize: '0.82rem' }}>{fn.trigger}</td>
                  <td style={{ padding: '0.65rem 0.75rem' }}>
                    <a href={fn.path} style={{ color: '#0070f3', textDecoration: 'none', fontFamily: 'monospace', fontSize: '0.82rem' }}>{fn.path}</a>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
        <div style={{ marginTop: '1rem', display: 'flex', gap: '1rem', flexWrap: 'wrap' }}>
          <div style={{ display: 'flex', alignItems: 'center', gap: '0.4rem', fontSize: '0.8rem', color: '#6b7280' }}>
            <span style={{ background: '#6366f1', color: '#fff', borderRadius: '4px', padding: '1px 6px', fontFamily: 'monospace', fontSize: '0.75rem' }}>tiny</span>
            Snabb och kostnadseffektiv — text- och bildtolkning
          </div>
          <div style={{ display: 'flex', alignItems: 'center', gap: '0.4rem', fontSize: '0.8rem', color: '#6b7280' }}>
            <span style={{ background: '#0ea5e9', color: '#fff', borderRadius: '4px', padding: '1px 6px', fontFamily: 'monospace', fontSize: '0.75rem' }}>small</span>
            Bättre resoneringsförmåga — kategorisering och matchning
          </div>
        </div>
      </section>
    </div>
  );
}

function computeExpiry(createdAt: string, validityMonths: string): { daysLeft: number | null; expiryDate: string | null } {
  if (!createdAt || !validityMonths) return { daysLeft: null, expiryDate: null };
  const months = parseInt(validityMonths, 10);
  if (isNaN(months) || months <= 0) return { daysLeft: null, expiryDate: null };

  const created = new Date(createdAt);
  if (isNaN(created.getTime())) return { daysLeft: null, expiryDate: null };

  const expiry = new Date(created);
  expiry.setMonth(expiry.getMonth() + months);

  const today = new Date();
  today.setHours(0, 0, 0, 0);
  expiry.setHours(0, 0, 0, 0);

  const daysLeft = Math.round((expiry.getTime() - today.getTime()) / (1000 * 60 * 60 * 24));
  const expiryDate = expiry.toLocaleDateString('sv-SE');

  return { daysLeft, expiryDate };
}