"use client";

import { useState, useEffect } from "react";
import { motion, AnimatePresence } from "framer-motion";
import {
  User,
  Shield,
  CreditCard,
  Bell,
  Save,
  Eye,
  EyeOff,
  Loader2,
  CheckCircle,
} from "lucide-react";
import {
  useCurrentUser,
  useUpdateProfile,
  useChangePassword,
  useCreditBalance,
  useCreditHistory,
  useSubscription,
} from "@/hooks/use-api";
import { useToast } from "@/components/ui/toast";

const tabs = [
  { id: "profile", label: "Profil", icon: User },
  { id: "security", label: "Güvenlik", icon: Shield },
  { id: "billing", label: "Abonelik", icon: CreditCard },
  { id: "notifications", label: "Bildirimler", icon: Bell },
] as const;

type TabId = (typeof tabs)[number]["id"];

export default function SettingsPage() {
  const [activeTab, setActiveTab] = useState<TabId>("profile");

  return (
    <div className="max-w-4xl mx-auto space-y-6">
      {/* Header */}
      <div>
        <h1 className="text-2xl md:text-3xl font-[family-name:var(--font-display)] font-bold text-[var(--color-text-primary)]">
          Ayarlar
        </h1>
        <p className="text-sm text-[var(--color-text-muted)] mt-1">
          Hesap ayarlarınızı ve tercihlerinizi yönetin
        </p>
      </div>

      {/* Tab Navigation */}
      <div className="flex gap-1 p-1 rounded-xl bg-[var(--color-bg-surface)] border border-[var(--color-border-faint)] overflow-x-auto">
        {tabs.map((tab) => {
          const Icon = tab.icon;
          const isActive = activeTab === tab.id;
          return (
            <button
              key={tab.id}
              onClick={() => setActiveTab(tab.id)}
              className={`relative flex items-center gap-2 px-4 py-2.5 rounded-lg text-sm font-medium transition-colors whitespace-nowrap ${
                isActive
                  ? "text-white"
                  : "text-[var(--color-text-muted)] hover:text-[var(--color-text-secondary)]"
              }`}
            >
              {isActive && (
                <motion.div
                  layoutId="settings-tab"
                  className="absolute inset-0 rounded-lg bg-violet-500/15 border border-violet-500/20"
                  transition={{ type: "spring", bounce: 0.2, duration: 0.5 }}
                />
              )}
              <Icon size={16} className="relative z-10" />
              <span className="relative z-10">{tab.label}</span>
            </button>
          );
        })}
      </div>

      {/* Tab Content */}
      <AnimatePresence mode="wait">
        <motion.div
          key={activeTab}
          initial={{ opacity: 0, y: 8 }}
          animate={{ opacity: 1, y: 0 }}
          exit={{ opacity: 0, y: -8 }}
          transition={{ duration: 0.2 }}
        >
          {activeTab === "profile" && <ProfileTab />}
          {activeTab === "security" && <SecurityTab />}
          {activeTab === "billing" && <BillingTab />}
          {activeTab === "notifications" && <NotificationsTab />}
        </motion.div>
      </AnimatePresence>
    </div>
  );
}

/* ─── PROFILE TAB ─── */
function ProfileTab() {
  const { data: userData, isLoading } = useCurrentUser();
  const updateProfile = useUpdateProfile();
  const toast = useToast();

  const user = userData?.data ?? userData;

  const [firstName, setFirstName] = useState("");
  const [lastName, setLastName] = useState("");

  useEffect(() => {
    if (user) {
      setFirstName(user.firstName ?? "");
      setLastName(user.lastName ?? "");
    }
  }, [user]);

  const handleSave = async () => {
    try {
      await updateProfile.mutateAsync({ firstName, lastName });
      toast.success("Profil başarıyla güncellendi");
    } catch {
      toast.error("Profil güncellenirken bir hata oluştu");
    }
  };

  if (isLoading) {
    return (
      <div className="card p-12 flex items-center justify-center">
        <Loader2 className="animate-spin text-violet-400" size={24} />
      </div>
    );
  }

  return (
    <div className="card p-6 space-y-6">
      <h2 className="text-lg font-semibold text-[var(--color-text-primary)]">
        Profil Bilgileri
      </h2>

      <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
        <div>
          <label className="block text-xs font-medium text-[var(--color-text-muted)] mb-1.5">
            Ad
          </label>
          <input
            type="text"
            value={firstName}
            onChange={(e) => setFirstName(e.target.value)}
            className="w-full px-4 py-2.5 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)] text-[var(--color-text-primary)] text-sm focus:outline-none focus:border-violet-500/50 focus:ring-1 focus:ring-violet-500/25 transition-all"
            placeholder="Adınız"
          />
        </div>
        <div>
          <label className="block text-xs font-medium text-[var(--color-text-muted)] mb-1.5">
            Soyad
          </label>
          <input
            type="text"
            value={lastName}
            onChange={(e) => setLastName(e.target.value)}
            className="w-full px-4 py-2.5 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)] text-[var(--color-text-primary)] text-sm focus:outline-none focus:border-violet-500/50 focus:ring-1 focus:ring-violet-500/25 transition-all"
            placeholder="Soyadınız"
          />
        </div>
      </div>

      <div>
        <label className="block text-xs font-medium text-[var(--color-text-muted)] mb-1.5">
          E-posta
        </label>
        <input
          type="email"
          value={user?.email ?? ""}
          disabled
          className="w-full px-4 py-2.5 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)] text-[var(--color-text-ghost)] text-sm cursor-not-allowed"
        />
        <p className="text-[10px] text-[var(--color-text-ghost)] mt-1">
          E-posta adresi değiştirilemez
        </p>
      </div>

      <div className="flex justify-end pt-2">
        <button
          onClick={handleSave}
          disabled={updateProfile.isPending}
          className="btn-primary flex items-center gap-2 px-6 py-2.5 text-sm"
        >
          {updateProfile.isPending ? (
            <Loader2 size={16} className="animate-spin" />
          ) : (
            <Save size={16} />
          )}
          Kaydet
        </button>
      </div>
    </div>
  );
}

/* ─── SECURITY TAB ─── */
function SecurityTab() {
  const changePassword = useChangePassword();
  const toast = useToast();

  const [current, setCurrent] = useState("");
  const [newPw, setNewPw] = useState("");
  const [confirm, setConfirm] = useState("");
  const [showCurrent, setShowCurrent] = useState(false);
  const [showNew, setShowNew] = useState(false);

  const handleChange = async () => {
    if (newPw !== confirm) {
      toast.warning("Yeni şifre ve onay eşleşmiyor");
      return;
    }
    if (newPw.length < 8) {
      toast.warning("Yeni şifre en az 8 karakter olmalı");
      return;
    }

    try {
      await changePassword.mutateAsync({
        currentPassword: current,
        newPassword: newPw,
      });
      toast.success("Şifre başarıyla güncellendi");
      setCurrent("");
      setNewPw("");
      setConfirm("");
    } catch {
      toast.error("Mevcut şifre hatalı veya bir sorun oluştu");
    }
  };

  return (
    <div className="card p-6 space-y-6">
      <h2 className="text-lg font-semibold text-[var(--color-text-primary)]">
        Şifre Değiştir
      </h2>

      <div className="space-y-4 max-w-md">
        {/* Current */}
        <div>
          <label className="block text-xs font-medium text-[var(--color-text-muted)] mb-1.5">
            Mevcut Şifre
          </label>
          <div className="relative">
            <input
              type={showCurrent ? "text" : "password"}
              value={current}
              onChange={(e) => setCurrent(e.target.value)}
              className="w-full px-4 py-2.5 pr-10 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)] text-[var(--color-text-primary)] text-sm focus:outline-none focus:border-violet-500/50 focus:ring-1 focus:ring-violet-500/25 transition-all"
            />
            <button
              onClick={() => setShowCurrent(!showCurrent)}
              className="absolute right-3 top-1/2 -translate-y-1/2 text-[var(--color-text-ghost)]"
              type="button"
            >
              {showCurrent ? <EyeOff size={16} /> : <Eye size={16} />}
            </button>
          </div>
        </div>

        {/* New */}
        <div>
          <label className="block text-xs font-medium text-[var(--color-text-muted)] mb-1.5">
            Yeni Şifre
          </label>
          <div className="relative">
            <input
              type={showNew ? "text" : "password"}
              value={newPw}
              onChange={(e) => setNewPw(e.target.value)}
              className="w-full px-4 py-2.5 pr-10 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)] text-[var(--color-text-primary)] text-sm focus:outline-none focus:border-violet-500/50 focus:ring-1 focus:ring-violet-500/25 transition-all"
            />
            <button
              onClick={() => setShowNew(!showNew)}
              className="absolute right-3 top-1/2 -translate-y-1/2 text-[var(--color-text-ghost)]"
              type="button"
            >
              {showNew ? <EyeOff size={16} /> : <Eye size={16} />}
            </button>
          </div>
        </div>

        {/* Confirm */}
        <div>
          <label className="block text-xs font-medium text-[var(--color-text-muted)] mb-1.5">
            Yeni Şifre (Tekrar)
          </label>
          <input
            type="password"
            value={confirm}
            onChange={(e) => setConfirm(e.target.value)}
            className="w-full px-4 py-2.5 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)] text-[var(--color-text-primary)] text-sm focus:outline-none focus:border-violet-500/50 focus:ring-1 focus:ring-violet-500/25 transition-all"
          />
          {newPw && confirm && newPw !== confirm && (
            <p className="text-[10px] text-red-400 mt-1">Şifreler eşleşmiyor</p>
          )}
        </div>
      </div>

      <div className="flex justify-end pt-2">
        <button
          onClick={handleChange}
          disabled={changePassword.isPending || !current || !newPw || !confirm}
          className="btn-primary flex items-center gap-2 px-6 py-2.5 text-sm disabled:opacity-40"
        >
          {changePassword.isPending ? (
            <Loader2 size={16} className="animate-spin" />
          ) : (
            <Shield size={16} />
          )}
          Şifreyi Güncelle
        </button>
      </div>
    </div>
  );
}

/* ─── BILLING TAB ─── */
function BillingTab() {
  const { data: creditData } = useCreditBalance();
  const { data: subData } = useSubscription();
  const { data: historyData } = useCreditHistory();

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  const credits = (creditData as any)?.data ?? creditData;
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  const subscription = (subData as any)?.data ?? subData;
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  const transactions = (historyData as any)?.data?.transactions ?? (historyData as any)?.transactions ?? [];

  return (
    <div className="space-y-6">
      {/* Abonelik Kartı */}
      <div className="card p-6">
        <h2 className="text-lg font-semibold text-[var(--color-text-primary)] mb-4">
          Abonelik Durumu
        </h2>
        <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
          <div className="p-4 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)]">
            <p className="text-xs text-[var(--color-text-muted)] mb-1">Plan</p>
            <p className="text-lg font-bold text-[var(--color-text-primary)]">
              {subscription?.plan ?? "Free"}
            </p>
          </div>
          <div className="p-4 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)]">
            <p className="text-xs text-[var(--color-text-muted)] mb-1">Kalan Kredi</p>
            <p className="text-lg font-bold text-emerald-400">
              {credits?.remaining ?? credits?.balance ?? 0}
            </p>
          </div>
          <div className="p-4 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)]">
            <p className="text-xs text-[var(--color-text-muted)] mb-1">Aylık Limit</p>
            <p className="text-lg font-bold text-[var(--color-text-primary)]">
              {subscription?.monthlyCredits ?? credits?.total ?? 3}
            </p>
          </div>
        </div>
      </div>

      {/* Kredi Geçmişi */}
      <div className="card p-6">
        <h2 className="text-lg font-semibold text-[var(--color-text-primary)] mb-4">
          Kredi İşlem Geçmişi
        </h2>
        {transactions.length === 0 ? (
          <p className="text-sm text-[var(--color-text-muted)] text-center py-8">
            Henüz işlem geçmişi bulunmuyor
          </p>
        ) : (
          <div className="space-y-2">
            {transactions.slice(0, 10).map((tx: { id: string; amount: number; type: string; description: string; createdAt: string }) => (
              <div
                key={tx.id}
                className="flex items-center justify-between p-3 rounded-lg bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)]"
              >
                <div>
                  <p className="text-sm font-medium text-[var(--color-text-primary)]">
                    {tx.description || tx.type}
                  </p>
                  <p className="text-[10px] text-[var(--color-text-ghost)]">
                    {new Date(tx.createdAt).toLocaleDateString("tr-TR")}
                  </p>
                </div>
                <span
                  className={`text-sm font-bold ${
                    tx.amount > 0 ? "text-emerald-400" : "text-red-400"
                  }`}
                >
                  {tx.amount > 0 ? `+${tx.amount}` : tx.amount}
                </span>
              </div>
            ))}
          </div>
        )}
      </div>
    </div>
  );
}

/* ─── NOTIFICATIONS TAB ─── */
function NotificationsTab() {
  const toast = useToast();
  const [prefs, setPrefs] = useState({
    projectComplete: true,
    creditLow: true,
    weeklyReport: false,
    marketingEmails: false,
  });

  const toggle = (key: keyof typeof prefs) => {
    setPrefs((p) => ({ ...p, [key]: !p[key] }));
  };

  const handleSave = () => {
    toast.success("Bildirim tercihleri kaydedildi");
  };

  const notifItems = [
    {
      key: "projectComplete" as const,
      label: "Proje Tamamlandı",
      desc: "Video render işlemi tamamlandığında bildirim al",
    },
    {
      key: "creditLow" as const,
      label: "Düşük Kredi Uyarısı",
      desc: "Kredileriniz %20'nin altına düştüğünde uyarı al",
    },
    {
      key: "weeklyReport" as const,
      label: "Haftalık Rapor",
      desc: "Haftalık kullanım raporunu e-posta ile al",
    },
    {
      key: "marketingEmails" as const,
      label: "Pazarlama E-postaları",
      desc: "Yeni özellikler ve kampanyalar hakkında bilgi al",
    },
  ];

  return (
    <div className="card p-6 space-y-6">
      <h2 className="text-lg font-semibold text-[var(--color-text-primary)]">
        Bildirim Tercihleri
      </h2>

      <div className="space-y-3">
        {notifItems.map((item) => (
          <div
            key={item.key}
            className="flex items-center justify-between p-4 rounded-xl bg-[var(--color-bg-deep)] border border-[var(--color-border-faint)]"
          >
            <div>
              <p className="text-sm font-medium text-[var(--color-text-primary)]">
                {item.label}
              </p>
              <p className="text-[11px] text-[var(--color-text-ghost)] mt-0.5">
                {item.desc}
              </p>
            </div>
            <button
              onClick={() => toggle(item.key)}
              className={`relative w-11 h-6 rounded-full transition-colors ${
                prefs[item.key] ? "bg-violet-500" : "bg-[var(--color-bg-elevated)]"
              }`}
            >
              <motion.div
                className="absolute top-0.5 left-0.5 w-5 h-5 rounded-full bg-white shadow-md"
                animate={{ x: prefs[item.key] ? 20 : 0 }}
                transition={{ type: "spring", bounce: 0.25, duration: 0.3 }}
              />
            </button>
          </div>
        ))}
      </div>

      <div className="flex justify-end pt-2">
        <button
          onClick={handleSave}
          className="btn-primary flex items-center gap-2 px-6 py-2.5 text-sm"
        >
          <CheckCircle size={16} />
          Tercihleri Kaydet
        </button>
      </div>
    </div>
  );
}