import React, { useState, useEffect } from 'react';
import { useAuth } from '../context/AuthContext';
import { useMockStore } from '../data/mockStore';
import { SpotlightCard } from '../components/SpotlightCard';
import { User, Calendar, Clock, DollarSign, Save, Loader2, CheckCircle, History, Home, ShieldCheck } from 'lucide-react';
import { toast } from 'sonner';

const CustomerProfile = () => {
    const { user, updateProfile } = useAuth();
    const { meetings, properties } = useMockStore();
    const [activeTab, setActiveTab] = useState('details');
    const [isLoading, setIsLoading] = useState(false);

    // Form State
    const [formData, setFormData] = useState({
        name: '',
        email: '',
        phone: '',
        address: ''
    });

    useEffect(() => {
        if (user) {
            setFormData({
                name: user.name || '',
                email: user.username || '', // Assuming username is email for customers
                phone: user.phone || '555-0123', // Mock default if missing
                address: user.address || '123 Maple Ave, Plano, TX' // Mock default
            });
        }
    }, [user]);

    const handleSaveProfile = async (e) => {
        e.preventDefault();
        setIsLoading(true);
        try {
            // Simulate API delay
            await new Promise(resolve => setTimeout(resolve, 800));

            updateProfile({
                name: formData.name,
                username: formData.email,
                phone: formData.phone,
                address: formData.address
            });

            toast.success("Profile updated successfully!");
        } catch (error) {
            toast.error("Failed to update profile.");
        } finally {
            setIsLoading(false);
        }
    };

    // Filter Meetings
    const myMeetings = meetings.filter(m =>
        (m.customerId === user?.id) ||
        (m.customerName === user?.name) // Fallback for legacy data
    );

    // Get My Property
    const myProperty = properties.find(p => p.propertyData.propertyId === user?.propertyId);

    const upcomingVisits = myMeetings.filter(m => {
        const meetingDate = new Date(m.date);
        const today = new Date();
        today.setHours(0, 0, 0, 0);
        return meetingDate >= today && m.status !== 'Completed' && m.status !== 'Cancelled';
    }).sort((a, b) => new Date(a.date) - new Date(b.date));

    const pastVisits = myMeetings.filter(m => {
        const meetingDate = new Date(m.date);
        const today = new Date();
        today.setHours(0, 0, 0, 0);
        return meetingDate < today || m.status === 'Completed';
    }).sort((a, b) => new Date(b.date) - new Date(a.date));


    return (
        <div className="min-h-screen bg-zinc-50 dark:bg-[#09090b] text-zinc-900 dark:text-white p-8 pt-24 transition-colors duration-300">
            <div className="max-w-4xl mx-auto space-y-8">

                {/* Header */}
                <div className="flex items-center space-x-4 mb-8">
                    <div className="w-16 h-16 rounded-full bg-gradient-to-br from-blue-500 to-purple-600 flex items-center justify-center text-2xl font-bold text-white shadow-lg">
                        {user?.name?.charAt(0) || 'C'}
                    </div>
                    <div>
                        <h1 className="text-3xl font-black text-transparent bg-clip-text bg-gradient-to-r from-zinc-900 to-zinc-600 dark:from-white dark:to-white/60">
                            My Profile
                        </h1>
                        <p className="text-zinc-500 dark:text-zinc-400">Manage your account and view visit history.</p>
                    </div>
                </div>

                {/* Tabs */}
                <div className="flex space-x-1 border-b border-zinc-200 dark:border-zinc-800 mb-6 overflow-x-auto scrollbar-hide">
                    <button
                        onClick={() => setActiveTab('details')}
                        className={`px-4 md:px-6 py-3 text-xs md:text-sm font-bold uppercase tracking-wider border-b-2 transition-all whitespace-nowrap ${activeTab === 'details'
                            ? 'border-blue-500 text-blue-600 dark:text-blue-400'
                            : 'border-transparent text-zinc-500 hover:text-zinc-700 dark:hover:text-zinc-300'
                            }`}
                    >
                        Personal Details
                    </button>
                    <button
                        onClick={() => setActiveTab('property')}
                        className={`px-4 md:px-6 py-3 text-xs md:text-sm font-bold uppercase tracking-wider border-b-2 transition-all whitespace-nowrap ${activeTab === 'property'
                            ? 'border-blue-500 text-blue-600 dark:text-blue-400'
                            : 'border-transparent text-zinc-500 hover:text-zinc-700 dark:hover:text-zinc-300'
                            }`}
                    >
                        My Property
                    </button>
                    <button
                        onClick={() => setActiveTab('visits')}
                        className={`px-4 md:px-6 py-3 text-xs md:text-sm font-bold uppercase tracking-wider border-b-2 transition-all whitespace-nowrap ${activeTab === 'visits'
                            ? 'border-blue-500 text-blue-600 dark:text-blue-400'
                            : 'border-transparent text-zinc-500 hover:text-zinc-700 dark:hover:text-zinc-300'
                            }`}
                    >
                        Visit Management
                    </button>
                </div>

                {/* Content */}
                <div className="animate-in fade-in slide-in-from-bottom-4 duration-500">
                    {activeTab === 'details' ? (
                        <SpotlightCard>
                            <form onSubmit={handleSaveProfile} className="p-8 space-y-6">
                                <FormInput label="Full Name" icon={User} value={formData.name} onChange={v => setFormData({ ...formData, name: v })} required />
                                <FormInput label="Email Address" icon={null} prefix="@" type="email" value={formData.email} onChange={v => setFormData({ ...formData, email: v })} required />
                                <FormInput label="Phone Number" value={formData.phone} onChange={v => setFormData({ ...formData, phone: v })} required />
                                <div className="space-y-2 md:col-span-2">
                                    <label className="text-xs font-bold uppercase text-zinc-500">Address</label>
                                    <textarea
                                        value={formData.address}
                                        onChange={(e) => setFormData({ ...formData, address: e.target.value })}
                                        className="w-full px-4 py-2 bg-zinc-100 dark:bg-zinc-800/50 border border-zinc-200 dark:border-zinc-700 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent outline-none transition-all h-24 resize-none"
                                        placeholder="1234 Main St..."
                                    />
                                </div>

                                <div className="pt-4 border-t border-zinc-200 dark:border-zinc-800 flex justify-end">
                                    <button
                                        type="submit"
                                        disabled={isLoading}
                                        className="flex items-center px-6 py-2 bg-blue-600 hover:bg-blue-700 text-white rounded-lg font-bold shadow-lg shadow-blue-500/20 transition-all disabled:opacity-50 disabled:cursor-not-allowed"
                                    >
                                        {isLoading ? (
                                            <><Loader2 className="animate-spin mr-2" size={18} /> Saving...</>
                                        ) : (
                                            <><Save className="mr-2" size={18} /> Save Changes</>
                                        )}
                                    </button>
                                </div>
                            </form>
                        </SpotlightCard>
                    ) : activeTab === 'property' ? (
                        <SpotlightCard>
                            <form onSubmit={(e) => { e.preventDefault(); toast.success("Property details updated!"); }} className="p-8 space-y-8">

                                {/* Property Basics */}
                                <div className="space-y-6">
                                    <div className="flex items-center gap-2 pb-4 border-b border-zinc-200 dark:border-white/5 text-blue-600 dark:text-blue-400">
                                        <Home size={20} /> <h3 className="text-sm font-black uppercase tracking-widest">Property Basics</h3>
                                    </div>
                                    <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                                        <div className="md:col-span-2">
                                            <FormInput label="Address" value="2612 Dunwick Dr, Plano, TX 75023" onChange={() => { }} />
                                        </div>
                                        <FormInput label="Type" value="Residential" onChange={() => { }} />
                                        <FormInput label="Year Built" value="1971" onChange={() => { }} />
                                        <FormInput label="Built-Up Area (sqft)" value="2450" onChange={() => { }} />
                                        <FormInput label="Lot Size (sqft)" value="8500" onChange={() => { }} />
                                        <div className="grid grid-cols-3 gap-4 md:col-span-2">
                                            <FormInput label="Beds" value="4" onChange={() => { }} />
                                            <FormInput label="Baths" value="3" onChange={() => { }} />
                                            <FormInput label="Parking" value="2" onChange={() => { }} />
                                        </div>
                                    </div>
                                </div>

                                {/* Insurance Information */}
                                <div className="space-y-6">
                                    <div className="flex items-center gap-2 pb-4 border-b border-zinc-200 dark:border-white/5 text-purple-600 dark:text-purple-400">
                                        <ShieldCheck size={20} /> <h3 className="text-sm font-black uppercase tracking-widest">Insurance Information</h3>
                                    </div>
                                    <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                                        <FormInput label="Insurance Company" value="Farmers" onChange={() => { }} />
                                        <FormInput label="Policy Number" value="POL-987654321" onChange={() => { }} />
                                        <FormInput label="Claim Filed?" value="No" onChange={() => { }} />
                                        <FormInput label="Adjuster Name" value="" placeholder="N/A" onChange={() => { }} />
                                    </div>
                                </div>

                                <div className="pt-4 border-t border-zinc-200 dark:border-zinc-800 flex justify-end">
                                    <button
                                        type="submit"
                                        className="flex items-center px-6 py-2 bg-blue-600 hover:bg-blue-700 text-white rounded-lg font-bold shadow-lg shadow-blue-500/20 transition-all"
                                    >
                                        <Save className="mr-2" size={18} /> Save Details
                                    </button>
                                </div>
                            </form>
                        </SpotlightCard>
                    ) : (
                        <div className="space-y-8">
                            {/* Upcoming Visits */}
                            <section>
                                <h3 className="text-lg font-bold mb-4 flex items-center text-zinc-800 dark:text-zinc-200">
                                    <Calendar className="mr-2 text-blue-500" size={20} /> Upcoming Visits
                                </h3>
                                {upcomingVisits.length > 0 ? (
                                    <div className="grid gap-4">
                                        {upcomingVisits.map(visit => (
                                            <SpotlightCard key={visit.id} className="p-6">
                                                <div className="flex justify-between items-center">
                                                    <div className="flex items-center space-x-4">
                                                        <div className="w-12 h-12 rounded-xl bg-blue-50 dark:bg-blue-900/20 flex flex-col items-center justify-center text-blue-600 dark:text-blue-400 border border-blue-100 dark:border-blue-500/20">
                                                            <span className="text-[10px] uppercase font-bold">{new Date(visit.date).toLocaleString('default', { month: 'short' })}</span>
                                                            <span className="text-lg font-bold leading-none">{new Date(visit.date).getDate()}</span>
                                                        </div>
                                                        <div>
                                                            <h4 className="font-bold text-lg">{visit.agentName || 'Assigned Agent'}</h4>
                                                            <div className="flex items-center text-sm text-zinc-500 dark:text-zinc-400">
                                                                <Clock size={14} className="mr-1" /> {visit.time}
                                                            </div>
                                                        </div>
                                                    </div>
                                                    <div className="text-right">
                                                        <span className="px-3 py-1 bg-blue-100 dark:bg-blue-500/20 text-blue-700 dark:text-blue-300 text-xs font-bold uppercase rounded-full">
                                                            {visit.status}
                                                        </span>
                                                    </div>
                                                </div>
                                            </SpotlightCard>
                                        ))}
                                    </div>
                                ) : (
                                    <div className="p-8 text-center border border-dashed border-zinc-300 dark:border-zinc-700 rounded-xl text-zinc-500">
                                        No upcoming visits scheduled.
                                    </div>
                                )}
                            </section>

                            {/* Visit History */}
                            <section>
                                <h3 className="text-lg font-bold mb-4 flex items-center text-zinc-800 dark:text-zinc-200">
                                    <History className="mr-2 text-zinc-500" size={20} /> Visit History
                                </h3>
                                {pastVisits.length > 0 ? (
                                    <div className="grid gap-4">
                                        {pastVisits.map(visit => (
                                            <SpotlightCard key={visit.id} className="p-6 opacity-80 hover:opacity-100 transition-opacity">
                                                <div className="flex flex-col md:flex-row md:items-center justify-between gap-4">
                                                    <div className="flex items-center space-x-4">
                                                        <div className="w-10 h-10 rounded-full bg-zinc-100 dark:bg-zinc-800 flex items-center justify-center text-zinc-500">
                                                            <CheckCircle size={20} />
                                                        </div>
                                                        <div>
                                                            <div className="flex items-center gap-2">
                                                                <h4 className="font-bold">{visit.agentName || 'Agent'}</h4>
                                                                <span className="text-xs text-zinc-400">• {new Date(visit.date).toLocaleDateString()}</span>
                                                            </div>
                                                            <p className="text-sm text-zinc-600 dark:text-zinc-400 mt-1">
                                                                {visit.notes || 'No notes available.'}
                                                            </p>
                                                        </div>
                                                    </div>

                                                    {visit.dealValue !== undefined && (
                                                        <div className="flex items-center space-x-2 bg-emerald-50 dark:bg-emerald-900/10 px-4 py-2 rounded-lg border border-emerald-100 dark:border-emerald-500/20">
                                                            <DollarSign size={16} className="text-emerald-600 dark:text-emerald-400" />
                                                            <span className="font-bold text-emerald-700 dark:text-emerald-300">
                                                                ${visit.dealValue.toLocaleString()}
                                                            </span>
                                                        </div>
                                                    )}
                                                </div>
                                            </SpotlightCard>
                                        ))}
                                    </div>
                                ) : (
                                    <div className="p-8 text-center border border-dashed border-zinc-300 dark:border-zinc-700 rounded-xl text-zinc-500">
                                        No history available.
                                    </div>
                                )}
                            </section>
                        </div>
                    )}
                </div>

            </div>
        </div>
    );
};

// Helper Components
const ReadOnlyField = ({ label, value }) => (
    <div className="space-y-1">
        <label className="text-[10px] font-bold uppercase text-zinc-500 tracking-wider">{label}</label>
        <div className="text-sm font-medium text-zinc-900 dark:text-zinc-200 border-b border-zinc-200 dark:border-white/10 pb-1">
            {value}
        </div>
    </div>
);

const FormInput = ({ label, icon: Icon, prefix, value, onChange, type = "text", required }) => (
    <div className="space-y-2">
        <label className="text-xs font-bold uppercase text-zinc-500">{label} {required && <span className="text-red-500">*</span>}</label>
        <div className="relative">
            {Icon && <Icon className="absolute left-3 top-3 text-zinc-400" size={16} />}
            {prefix && <span className="absolute left-3 top-3 text-zinc-400 text-xs">{prefix}</span>}
            <input
                type={type}
                required={required}
                value={value}
                onChange={(e) => onChange(e.target.value)}
                className={`w-full ${Icon || prefix ? 'pl-10' : 'px-4'} pr-4 py-2 bg-zinc-100 dark:bg-zinc-800/50 border border-zinc-200 dark:border-zinc-700 rounded-lg focus:ring-2 focus:ring-blue-500 focus:border-transparent outline-none transition-all`}
            />
        </div>
    </div>
);

export default CustomerProfile;
