import React, { useEffect, useState } from 'react';
import { useParams, useNavigate } from 'react-router-dom';
import { ArrowLeft, MapPin, Calendar, Clock, DollarSign } from 'lucide-react';
import { useAuth } from '../contexts/AuthContext';
import { getAgendas } from '../services/apiService';
import EventScheduler from '../components/EventScheduler';
import EventLogistics from '../components/EventLogistics';

const EventDetails: React.FC = () => {
    const { id } = useParams<{ id: string }>();
    const navigate = useNavigate();
    const { token } = useAuth();
    const [event, setEvent] = useState<any | null>(null);
    const [loading, setLoading] = useState(true);
    const [calculatedStats, setCalculatedStats] = useState({ studios: 0 });

    useEffect(() => {
        if (id && token) {
            loadEvent();
        }
    }, [id, token]);

    const loadEvent = async () => {
        // Since we don't have a getEventById, we list and filter for now (MVP). 
        // Ideally backend should have GET /agenda/:id
        const res = await getAgendas(token!);
        if (res.data) {
            const found = res.data.find((e: any) => e.id === id);
            setEvent(found);
        }
        setLoading(false);
    };

    if (loading) return <div className="p-8 text-center">Carregando detalhes do evento...</div>;
    if (!event) return <div className="p-8 text-center text-red-500">Evento não encontrado.</div>;

    const formattedDate = new Date(event.data_evento).toLocaleDateString();

    return (
        <div className="min-h-screen bg-gray-50 p-6">
            <div className="max-w-7xl mx-auto space-y-6">
                {/* Header */}
                <div className="flex items-center gap-4">
                    <button onClick={() => navigate('/eventos')} className="p-2 hover:bg-gray-200 rounded-full transition-colors">
                        <ArrowLeft className="w-6 h-6 text-gray-600" />
                    </button>
                    <div>
                        <h1 className="text-2xl font-bold text-gray-800 flex items-center gap-2">
                            {event.empresa_nome} - {event.tipo_evento_nome}
                            <span className={`text-xs px-2 py-1 rounded-full ${event.status === 'Confirmado' ? 'bg-green-100 text-green-800' : 'bg-yellow-100 text-yellow-800'}`}>
                                {event.status}
                            </span>
                        </h1>
                        <p className="text-sm text-gray-500">ID: {event.fot_id}</p>
                    </div>
                </div>

                {/* Event Info Card (Spreadsheet Header Style) */}
                <div className="bg-white rounded-lg shadow p-4 grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4 border-l-4 border-brand-purple">
                    <div className="flex items-start gap-3">
                        <Calendar className="w-5 h-5 text-brand-purple mt-1" />
                        <div>
                            <p className="text-xs text-gray-500 uppercase font-bold">Data</p>
                            <p className="font-medium text-gray-800">{formattedDate}</p>
                        </div>
                    </div>
                    <div className="flex items-start gap-3">
                        <MapPin className="w-5 h-5 text-brand-purple mt-1" />
                        <div>
                            <p className="text-xs text-gray-500 uppercase font-bold">Local:</p>
                            {(() => {
                                const localVal = event['local_evento'] || event.local || event.local_evento;
                                const isUrl = localVal && String(localVal).startsWith('http');

                                if (isUrl) {
                                    return (
                                        <a
                                            href={localVal}
                                            target="_blank"
                                            rel="noopener noreferrer"
                                            className="font-medium text-brand-purple hover:underline truncate block"
                                            title="Abrir no Mapa"
                                        >
                                            {event.locationName || "Ver Localização no Mapa"}
                                        </a>
                                    );
                                }
                                return <p className="font-medium text-gray-800">{localVal || "Não informado"}</p>;
                            })()}
                            <p className="text-xs text-gray-500">{event.endereco}</p>
                        </div>
                    </div>
                    <div className="flex items-start gap-3">
                        <Clock className="w-5 h-5 text-brand-purple mt-1" />
                        <div>
                            <p className="text-xs text-gray-500 uppercase font-bold">Horário</p>
                            <p className="font-medium text-gray-800">{event.horario}</p>
                        </div>
                    </div>
                    <div className="flex items-start gap-3">
                        <div className="w-5 h-5 text-brand-purple mt-1 font-bold text-xs border border-brand-purple rounded flex items-center justify-center">?</div>
                        <div>
                            <p className="text-xs text-gray-500 uppercase font-bold">Observações</p>
                            <p className="text-xs text-gray-600 line-clamp-2">{event.observacoes_evento || "Nenhuma observação."}</p>
                        </div>
                    </div>
                </div>

                {/* Main Content: Scheduling & Logistics */}
                <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
                    {/* Left: Scheduling (Escala) */}
                    <EventScheduler
                        agendaId={id!}
                        dataEvento={event.data_evento.split('T')[0]}
                        allowedProfessionals={(event as any).assigned_professionals?.map((p: any) => p.professional_id)}
                        onUpdateStats={setCalculatedStats}
                        defaultTime={event.horario}
                    />

                    {/* Right: Logistics (Carros) */}
                    <div className="space-y-6">
                        <EventLogistics
                            agendaId={id!}
                            assignedProfessionals={(event as any).assigned_professionals?.map((p: any) => p.professional_id)}
                        />

                        {/* Equipment / Studios Section (Placeholder for now based on spreadsheet) */}
                        <div className="bg-white p-4 rounded-lg shadow">
                            <h3 className="text-lg font-semibold text-gray-800 mb-2 flex items-center">
                                <DollarSign className="w-5 h-5 mr-2 text-green-600" /> {/* Using DollarSign as generic icon for assets/inventory for now, map to Camera later */}
                                Equipamentos & Estúdios
                            </h3>
                            <div className="bg-gray-50 p-3 rounded text-sm space-y-2">
                                <div className="flex justify-between border-b pb-2">
                                    <span className="text-gray-600">Qtd. Estúdios (Automático):</span>
                                    <span className="font-bold text-indigo-600">{calculatedStats.studios}</span>
                                </div>
                                <div className="flex justify-between border-b pb-2">
                                    <span className="text-gray-600">Ponto de Foto:</span>
                                    <span className="font-bold">{event.qtd_ponto_foto || 0}</span>
                                </div>
                                <div className="mt-2">
                                    <p className="text-xs text-gray-500 font-bold mb-1">Notas de Equipamento:</p>
                                    <textarea
                                        className="w-full text-xs p-2 rounded border bg-white"
                                        placeholder="Ex: Levar 2 tripés extras..."
                                        rows={3}
                                    />
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    );
};

export default EventDetails;