"use client";

import { useState, useEffect } from "react";
import { useDictionary } from "@/components/DictionaryContext";
import { useSession } from "next-auth/react";

export default function SettingsPage() {
  const { data: session } = useSession();
  const [profile, setProfile] = useState<any>(null);
  const [waStatus, setWaStatus] = useState<any>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [saving, setSaving] = useState(false);
  const [fetchingQr, setFetchingQr] = useState(false);
  const dict = useDictionary();

  useEffect(() => {
    fetchProfile();
    fetchWaStatus();
    
    const interval = setInterval(() => {
      fetchWaStatus();
    }, 5000);

    return () => clearInterval(interval);
  }, []);

  const fetchProfile = async () => {
    try {
      const res = await fetch("/api/users/profile");
      const data = await res.json();
      if (data && data.error) setError(data.error);
      else if (!data) setError("Kullanıcı profili bulunamadı.");
      else setProfile(data);
    } catch (e: any) {
      setError(e.message);
    } finally {
      setLoading(false);
    }
  };

  const fetchWaStatus = async () => {
    try {
      const res = await fetch("/api/whatsapp/status");
      const data = await res.json();
      setWaStatus(data);
    } catch (e) {
      console.error(e);
    }
  };

  const handleConnectWa = async () => {
    setFetchingQr(true);
    try {
      const res = await fetch("/api/whatsapp/qr");
      const data = await res.json();
      setWaStatus(data);
    } catch (e) {
      console.error(e);
    } finally {
      setFetchingQr(false);
    }
  };

  const handleSave = async (e: React.FormEvent) => {
    e.preventDefault();
    setSaving(true);
    try {
      const res = await fetch("/api/users/profile", {
        method: "PATCH",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(profile)
      });
      if (res.ok) alert("Ayarlar kaydedildi!");
      else {
        const data = await res.json();
        alert("Hata: " + (data?.error || "Bilinmeyen bir hata oluştu."));
      }
    } catch (e: any) {
      alert("Hata: " + e.message);
    } finally {
      setSaving(false);
    }
  };

  if (loading) return <div className="page-body"><span className="spinner" /></div>;
  if (error) return <div className="page-body"><div className="card" style={{ color: "var(--error)" }}>Hata: {error}</div></div>;
  if (!profile) return <div className="page-body">Profil yüklenemedi.</div>;

  return (
    <>
      <div className="page-header">
        <div>
          <h1 className="page-title">Bildirim Ayarları</h1>
          <p className="page-subtitle">Telegram ve WhatsApp bildirimlerinizi buradan yönetin.</p>
        </div>
      </div>

      <div className="page-body" style={{ maxWidth: 800 }}>
        <form onSubmit={handleSave} className="form-group">
          <div className="card">
            <h3 style={{ marginBottom: 20, display: "flex", alignItems: "center", gap: 10 }}>
              <TelegramIcon /> Telegram Bildirimleri
            </h3>
            <div style={{ display: "flex", alignItems: "center", gap: 10, marginBottom: 20 }}>
              <input 
                type="checkbox" 
                id="tg-enabled"
                checked={profile.telegramEnabled}
                onChange={e => setProfile({...profile, telegramEnabled: e.target.checked})}
              />
              <label htmlFor="tg-enabled">Telegram bildirimlerini aktif et</label>
            </div>
            <div>
              <label className="label">Telegram ID</label>
              <input 
                className="input" 
                value={profile.telegramId || ""} 
                onChange={e => setProfile({...profile, telegramId: e.target.value})}
                placeholder="Örn: 5009005027"
              />
            </div>
          </div>

          <div className="card" style={{ marginTop: 24 }}>
            <h3 style={{ marginBottom: 20, display: "flex", alignItems: "center", gap: 10 }}>
              <WhatsAppIcon /> WhatsApp Bildirimleri
            </h3>
            <div style={{ display: "flex", alignItems: "center", gap: 10, marginBottom: 20 }}>
              <input 
                type="checkbox" 
                id="wa-enabled"
                checked={profile.whatsappEnabled}
                onChange={e => setProfile({...profile, whatsappEnabled: e.target.checked})}
              />
              <label htmlFor="wa-enabled">WhatsApp bildirimlerini aktif et</label>
            </div>
            
            <div style={{ display: "grid", gridTemplateColumns: "1fr 1fr", gap: 24 }}>
              <div>
                <label className="label">Telefon Numarası</label>
                <input 
                  className="input" 
                  value={profile.whatsappNumber || ""} 
                  onChange={e => setProfile({...profile, whatsappNumber: e.target.value})}
                  placeholder="90554XXXXXXX"
                />
              </div>
              
              <div style={{ borderLeft: "1px solid var(--border)", paddingLeft: 24 }}>
                <label className="label">Bağlantı Durumu</label>
                {waStatus?.status === 'connected' ? (
                  <div style={{ color: "#10b981", fontWeight: 600, display: "flex", alignItems: "center", gap: 8 }}>
                    <div style={{ width: 8, height: 8, borderRadius: "50%", background: "#10b981" }} />
                    Bağlı ✅
                  </div>
                ) : (
                  <div>
                    <div style={{ color: "#ef4444", fontWeight: 600, display: "flex", alignItems: "center", gap: 8, marginBottom: 12 }}>
                      <div style={{ width: 8, height: 8, borderRadius: "50%", background: "#ef4444" }} />
                      Bağlı Değil
                    </div>
                    {waStatus?.qr ? (
                      <div style={{ background: "#fff", padding: 10, borderRadius: 8, width: "fit-content" }}>
                        <img src={waStatus.qr} alt="QR Code" style={{ width: 150, height: 150 }} />
                        <p style={{ fontSize: 11, color: "#000", textAlign: "center", marginTop: 5 }}>WhatsApp'tan okutun</p>
                      </div>
                    ) : (
                      <button 
                        type="button" 
                        className="btn btn-secondary btn-sm"
                        onClick={handleConnectWa}
                        disabled={fetchingQr}
                      >
                        {fetchingQr ? "QR Oluşturuluyor..." : "Bağlantı Kur (QR)"}
                      </button>
                    )}
                  </div>
                )}
              </div>
            </div>
          </div>

          <div style={{ marginTop: 24, display: "flex", justifyContent: "flex-end" }}>
            <button type="submit" className="btn btn-primary" disabled={saving}>
              {saving ? <span className="spinner" /> : "Değişiklikleri Kaydet"}
            </button>
          </div>
        </form>
      </div>
    </>
  );
}

function TelegramIcon() { return <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="m22 2-7 20-4-9-9-4Z"/><path d="M22 2 11 13"/></svg>; }
function WhatsAppIcon() { return <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5Z"/></svg>; }