/**
 * ════════════════════════════════════════════════════════════
 * مُصادَق (Musadaq) — Staff Management Page (Premium Dark)
 * ════════════════════════════════════════════════════════════
 */

import { useState, useEffect } from 'react';
import { Users, UserPlus, Search, Shield, Mail, Phone, MoreVertical, Trash2, Loader2, X } from 'lucide-react';
import { motion, AnimatePresence } from 'framer-motion';
import apiClient from '../../api/client';

export const StaffPage = () => {
    const [staff, setStaff] = useState<any[]>([]);
    const [isLoading, setIsLoading] = useState(true);
    const [searchTerm, setSearchTerm] = useState('');
    const [isAddModalOpen, setIsAddModalOpen] = useState(false);

    // Form State
    const [name, setName] = useState('');
    const [email, setEmail] = useState('');
    const [password, setPassword] = useState('');
    const [role, setRole] = useState('manager');
    const [isSubmitting, setIsSubmitting] = useState(false);

    const fetchStaff = async () => {
        try {
            const { data } = await apiClient.get('/staff');
            setStaff(data);
        } catch (error) {
            console.error('Failed to fetch staff', error);
        } finally {
            setIsLoading(false);
        }
    };

    useEffect(() => {
        fetchStaff();
    }, []);

    const handleCreateStaff = async (e: React.FormEvent) => {
        e.preventDefault();
        setIsSubmitting(true);
        try {
            await apiClient.post('/staff', { name, email, password, role });
            setIsAddModalOpen(false);
            setName('');
            setEmail('');
            setPassword('');
            fetchStaff();
        } catch (error) {
            console.error('Failed to create staff', error);
            alert('حدث خطأ أثناء إضافة الموظف');
        } finally {
            setIsSubmitting(false);
        }
    };

    const handleDelete = async (id: string) => {
        if (!confirm('هل أنت متأكد من حذف هذا الموظف؟')) return;
        try {
            await apiClient.post(`/staff/${id}/delete`);
            fetchStaff();
        } catch (error) {
            alert('فشل حذف الموظف');
        }
    };

    const filteredStaff = staff.filter(s => 
        s.name.toLowerCase().includes(searchTerm.toLowerCase()) || 
        s.email.toLowerCase().includes(searchTerm.toLowerCase())
    );

    return (
        <div className="space-y-8 animate-in fade-in duration-700">
            <header className="flex items-center justify-between">
                <div>
                    <h2 className="text-3xl font-black text-white">إدارة الموظفين</h2>
                    <p className="text-slate-400 mt-1">إدارة فريق العمل المالي لمكتب المحاسبة الخاص بك.</p>
                </div>
                <button 
                    onClick={() => setIsAddModalOpen(true)}
                    className="bg-emerald-500 hover:bg-emerald-600 text-slate-950 font-bold py-3 px-8 rounded-xl flex items-center gap-2 shadow-lg shadow-emerald-500/20 transition-all active:scale-95"
                >
                    <UserPlus className="w-5 h-5" />
                    إضافة موظف جديد
                </button>
            </header>

            {/* ── Search Bar ──────────────────────────────── */}
            <div className="bg-slate-900/50 backdrop-blur-xl border border-slate-800/60 rounded-xl px-4 py-3 flex items-center gap-3">
                <Search className="w-5 h-5 text-slate-500" />
                <input 
                    type="text" 
                    placeholder="ابحث بالاسم أو البريد الإلكتروني..." 
                    className="bg-transparent border-none outline-none flex-1 text-slate-200 text-sm placeholder-slate-500"
                    value={searchTerm}
                    onChange={(e) => setSearchTerm(e.target.value)}
                />
            </div>

            {/* ── Staff List ───────────────────────────────────── */}
            <div className="bg-slate-900/50 backdrop-blur-xl border border-slate-800/60 rounded-2xl overflow-hidden min-h-[400px] flex flex-col">
                {isLoading ? (
                    <div className="flex-1 flex flex-col justify-center items-center">
                        <Loader2 className="w-8 h-8 text-emerald-500 animate-spin mb-4" />
                        <p className="text-slate-500">جاري جلب بيانات الفريق...</p>
                    </div>
                ) : filteredStaff.length === 0 ? (
                    <div className="flex-1 flex flex-col items-center justify-center p-20 text-center">
                        <div className="w-20 h-20 bg-slate-800 rounded-2xl flex items-center justify-center mb-6 border border-slate-700">
                            <Users className="w-10 h-10 text-slate-600" />
                        </div>
                        <h3 className="text-xl font-bold text-white mb-2">لا يوجد موظفون مضافون</h3>
                        <p className="text-slate-500 max-w-sm mb-8">يمكنك إضافة موظفين لمساعدتك في إدارة ومعالجة فواتير الشركات.</p>
                        <button onClick={() => setIsAddModalOpen(true)} className="bg-emerald-500 hover:bg-emerald-600 text-slate-950 font-bold py-3 px-8 rounded-xl transition-all">
                             إضافة أول موظف
                        </button>
                    </div>
                ) : (
                    <div className="overflow-x-auto">
                        <table className="w-full text-right">
                            <thead className="bg-slate-800/50 border-b border-slate-800/60">
                                <tr>
                                    <th className="px-6 py-4 text-xs font-bold text-slate-400">الاسم الكامل</th>
                                    <th className="px-6 py-4 text-xs font-bold text-slate-400">البريد الإلكتروني</th>
                                    <th className="px-6 py-4 text-xs font-bold text-slate-400">الدور الوظيفي</th>
                                    <th className="px-6 py-4 text-xs font-bold text-slate-400 text-center">إجراءات</th>
                                </tr>
                            </thead>
                            <tbody className="divide-y divide-slate-800/50">
                                {filteredStaff.map((s, idx) => (
                                    <motion.tr 
                                        key={s.id}
                                        initial={{ opacity: 0, x: 20 }}
                                        animate={{ opacity: 1, x: 0 }}
                                        transition={{ delay: idx * 0.05 }}
                                        className="hover:bg-slate-800/30 transition-colors"
                                    >
                                        <td className="px-6 py-4 font-bold text-white">
                                            <div className="flex items-center gap-3">
                                                <div className="w-10 h-10 rounded-full bg-gradient-to-br from-slate-700 to-slate-800 flex items-center justify-center text-slate-300 font-black border border-slate-700">
                                                    {s.name[0]}
                                                </div>
                                                {s.name}
                                            </div>
                                        </td>
                                        <td className="px-6 py-4 text-slate-400">
                                            <div className="flex items-center gap-2">
                                                <Mail className="w-4 h-4 text-slate-600" />
                                                {s.email}
                                            </div>
                                        </td>
                                        <td className="px-6 py-4">
                                            <span className={`inline-flex items-center gap-1.5 px-3 py-1 rounded-md text-[10px] font-bold border ${
                                                s.role === 'admin' 
                                                ? 'text-emerald-400 bg-emerald-400/5 border-emerald-400/20' 
                                                : 'text-blue-400 bg-blue-400/5 border-blue-400/20'
                                            } uppercase tracking-widest`}>
                                                <Shield className="w-3 h-3" />
                                                {s.role === 'admin' ? 'مدير نظام' : 'محاسب'}
                                            </span>
                                        </td>
                                        <td className="px-6 py-4 text-center">
                                            <div className="flex items-center justify-center gap-2">
                                                <button className="p-2 text-slate-500 hover:text-white transition-colors">
                                                    <MoreVertical className="w-4 h-4" />
                                                </button>
                                                <button 
                                                    onClick={() => handleDelete(s.id)}
                                                    className="p-2 text-slate-500 hover:text-red-400 hover:bg-red-500/10 rounded-lg transition-all"
                                                >
                                                    <Trash2 className="w-4 h-4" />
                                                </button>
                                            </div>
                                        </td>
                                    </motion.tr>
                                ))}
                            </tbody>
                        </table>
                    </div>
                )}
            </div>

            {/* ── Add Staff Modal ─────────────────────────────────── */}
            <AnimatePresence>
                {isAddModalOpen && (
                    <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-slate-950/80 backdrop-blur-md">
                        <motion.div 
                            initial={{ scale: 0.9, opacity: 0 }}
                            animate={{ scale: 1, opacity: 1 }}
                            exit={{ scale: 0.9, opacity: 0 }}
                            className="bg-slate-900 border border-slate-800 p-8 w-full max-w-md rounded-3xl shadow-2xl relative"
                        >
                            <button onClick={() => setIsAddModalOpen(false)} className="absolute top-6 left-6 text-slate-500 hover:text-white transition-colors">
                                <X className="w-6 h-6" />
                            </button>

                            <h3 className="text-2xl font-bold text-white mb-6">إضافة موظف جديد</h3>
                            <form onSubmit={handleCreateStaff} className="space-y-5">
                                <div>
                                    <label className="block text-sm font-bold text-slate-400 mb-2">الاسم الكامل</label>
                                    <input 
                                        type="text" 
                                        required
                                        value={name}
                                        onChange={e => setName(e.target.value)}
                                        className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 outline-none focus:border-emerald-500/50 transition-all text-white placeholder-slate-600"
                                        placeholder="مثال: أحمد محمد"
                                    />
                                </div>
                                <div>
                                    <label className="block text-sm font-bold text-slate-400 mb-2">البريد الإلكتروني</label>
                                    <input 
                                        type="email" 
                                        required
                                        value={email}
                                        onChange={e => setEmail(e.target.value)}
                                        className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 outline-none focus:border-emerald-500/50 transition-all text-white placeholder-slate-600"
                                        placeholder="ahmed@office.com"
                                    />
                                </div>
                                <div>
                                    <label className="block text-sm font-bold text-slate-400 mb-2">كلمة المرور المؤقتة</label>
                                    <input 
                                        type="password" 
                                        required
                                        value={password}
                                        onChange={e => setPassword(e.target.value)}
                                        className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 outline-none focus:border-emerald-500/50 transition-all text-white placeholder-slate-600"
                                        placeholder="••••••••"
                                    />
                                </div>
                                <div>
                                    <label className="block text-sm font-bold text-slate-400 mb-2">الدور الوظيفي</label>
                                    <select 
                                        value={role}
                                        onChange={e => setRole(e.target.value)}
                                        className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 outline-none focus:border-emerald-500/50 transition-all text-white appearance-none cursor-pointer"
                                    >
                                        <option value="manager">محاسب (عرض ومعالجة)</option>
                                        <option value="admin">مدير نظام (صلاحيات كاملة)</option>
                                    </select>
                                </div>
                                <div className="flex gap-4 pt-4">
                                    <button 
                                        type="button" 
                                        onClick={() => setIsAddModalOpen(false)}
                                        className="flex-1 bg-slate-800 text-slate-400 font-bold py-3 rounded-xl hover:bg-slate-700 transition-all"
                                    >
                                        إلغاء
                                    </button>
                                    <button 
                                        type="submit" 
                                        disabled={isSubmitting}
                                        className="flex-1 bg-emerald-500 text-slate-950 font-bold py-3 rounded-xl shadow-lg shadow-emerald-500/20 flex items-center justify-center gap-2 transition-all"
                                    >
                                        {isSubmitting && <Loader2 className="w-4 h-4 animate-spin" />}
                                        حفظ البيانات
                                    </button>
                                </div>
                            </form>
                        </motion.div>
                    </div>
                )}
            </AnimatePresence>
        </div>
    );
};