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 { useData } from '../contexts/DataContext';
import { getAgendas } from '../services/apiService';
import { UserRole, AssignmentStatus } from '../types';
import EventScheduler from '../components/EventScheduler';
import EventLogistics from '../components/EventLogistics';

const EventDetails: React.FC = () => {
    const { id } = useParams<{ id: string }>();
    const navigate = useNavigate();
    const { user } = useAuth();
    const { events, loading } = useData();
    const [calculatedStats, setCalculatedStats] = useState({ studios: 0 });

    const event = events.find(e => e.id === id);

    // No local loading state needed if events are loaded globally, or check if events.length === 0 && loading
    if (!event) return <div className="p-8 text-center text-red-500">Evento não encontrado ou carregando...</div>;

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

    // Check if user can view logistics
    const isCoordinator = event?.assignments?.some(a => a.professionalId === (user?.professionalId || user?.id) && a.is_coordinator);
    const canViewLogistics = isCoordinator || user?.role === UserRole.SUPERADMIN || user?.role === UserRole.EVENT_OWNER || user?.role === UserRole.BUSINESS_OWNER;

    // Use event.date which is already YYYY-MM-DD from DataContext
    const formattedDate = new Date(event.date + "T00:00:00").toLocaleDateString();

    return (
        <div className="min-h-screen bg-gray-50 p-6 pt-24">
            <div className="max-w-7xl mx-auto space-y-6">
                {/* Header */}
                <div className="flex items-center gap-4">
                    <button onClick={() => window.location.href = `/painel?eventId=${id}`} className="flex items-center gap-2 px-3 py-2 hover:bg-gray-200 rounded-lg transition-colors text-gray-600">
                        <ArrowLeft className="w-5 h-5" />
                        <span className="font-medium">Voltar</span>
                    </button>
                    <div className="w-px h-8 bg-gray-300 mx-2 hidden sm:block"></div>
                    <div>
                        <h1 className="text-2xl font-bold text-gray-800 flex items-center gap-2">
                            {(() => {
                                const name = event.empresa_nome || event.name;
                                const type = event.tipo_evento_nome || event.type;
                                return name === type ? name : `${name} - ${type}`;
                            })()}
                            <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>
                        {(event.fot_id || event.fot || event.id) && (
                            <p className="text-sm text-gray-500">ID: {event.fot_id || event.fot || event.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 || event.time || "Não definido"}</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 ${canViewLogistics ? 'lg:grid-cols-2' : ''} gap-6`}>
                    <EventScheduler
                        agendaId={id!}
                        dataEvento={event.date}
                        allowedProfessionals={event.assignments}
                        onUpdateStats={setCalculatedStats}
                        defaultTime={event.time}
                    />

                    {/* Right: Logistics (Carros) - Only visible if user has permission */}
                    {canViewLogistics && (
                        <div className="space-y-6">
                            <EventLogistics
                                agendaId={id!}
                                assignedProfessionals={event.assignments
                                    ?.filter((a: any) => a.status === AssignmentStatus.ACCEPTED)
                                    .map((a: any) => a.professionalId)}
                            />

                            {/* 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;