import LoadingScreen from '@/components/LoadingScreen';
import api from '@/utils/api';
import { useLocalSearchParams, useRouter } from 'expo-router';
import { StatusBar } from 'expo-status-bar';
import { Building2, ChevronLeft, Paperclip, AlertCircle, FileText } from 'lucide-react-native';
import React, { useEffect, useState } from 'react';
import { ScrollView, Text, TouchableOpacity, View } from 'react-native';
import { SafeAreaView } from 'react-native-safe-area-context';

const InfoRow = ({ 
    label, 
    value, 
    isLast = false, 
    isCode = false 
}: { 
    label: string; 
    value?: string | number | null; 
    isLast?: boolean; 
    isCode?: boolean 
}) => (
    <View className={`flex-row justify-between items-start ${!isLast ? 'border-b border-slate-100 pb-3' : ''}`}>
        <Text className="text-slate-500 font-medium">{label}</Text>
        <Text 
            selectable={true} 
            className={`text-primary-dark font-bold text-right flex-1 ${isCode ? 'tracking-widest' : ''}`}
        >
            {value || '-'}
        </Text>
    </View>
);

export default function ConstructionSiteDetailsScreen() {
    const { id } = useLocalSearchParams();
    const router = useRouter();
    const [isLoading, setIsLoading] = useState(true);
    const [siteData, setSiteData] = useState<any>(null);

    const fetchDetails = async () => {
        try {
            const response = await api.get(`/construction-site/get-info?id=${id}`);
            if (response.data?.success) {
                setSiteData(response.data.result);
            }
        } catch (error) {
            console.error('Errore nel recupero dei dettagli del cantiere:', error);
        } finally {
            setIsLoading(false);
        }
    };

    useEffect(() => {
        if (id) {
            fetchDetails();
        }
    }, [id]);

    if (isLoading) {
        return <LoadingScreen />;
    }

    if (!siteData) {
        return (
            <View className="flex-1 bg-slate-50 justify-center items-center">
                <AlertCircle size={48} color="#94a3b8" />
                <Text className="text-slate-500 mt-4 font-medium">Impossibile caricare i dettagli.</Text>
                <TouchableOpacity onPress={() => router.back()} className="mt-4 px-6 py-2 bg-primary-dark rounded-full">
                    <Text className="text-white font-bold">Indietro</Text>
                </TouchableOpacity>
            </View>
        );
    }

    const { constructionSite, client, subactivities } = siteData;

    return (
        <View className="flex-1 bg-primary-dark">
            <StatusBar style="light" />
            <SafeAreaView edges={['top']} className="pt-5">
                {/* Header */}
                <View className="pb-6 px-6 z-10 flex-row items-center justify-between">
                    <TouchableOpacity
                        onPress={() => router.push(`/`)}
                        className="p-2 -ml-2 rounded-full active:bg-white/20 w-12 items-center justify-center"
                    >
                        <ChevronLeft size={28} color="white" pointerEvents="none" />
                    </TouchableOpacity>
                    
                    <View className="flex-1 px-2">
                        <Text className="text-white text-xl font-bold text-center leading-tight" numberOfLines={1}>
                            {constructionSite?.name || 'Dettaglio Cantiere'}
                        </Text>
                    </View>

                    <TouchableOpacity
                        onPress={() => router.push(`/construction-site/${id}/documents?name=${encodeURIComponent(constructionSite?.name || '')}`)}
                        className="p-2 -mr-2 rounded-full active:bg-white/20 w-12 items-center justify-center"
                    >
                        <Paperclip size={22} color="white" pointerEvents="none" />
                    </TouchableOpacity>
                </View>
            </SafeAreaView>

            {/* Content */}
            <View className="flex-1 bg-slate-50 rounded-t-[2.5rem] overflow-hidden">
                <ScrollView 
                    className="flex-1 px-6 pt-8"
                    contentContainerStyle={{ paddingBottom: 100 }}
                    showsVerticalScrollIndicator={false}
                >
                    {/* Info Card */}
                    <View className="bg-white rounded-3xl p-6 shadow-sm border border-slate-100 mb-6">
                        <View className="flex-row items-center mb-6">
                            <View className="bg-primary-50 p-3 rounded-xl mr-4">
                                <Building2 size={24} color="#1071C2" />
                            </View>
                            <Text className="text-xl font-bold text-slate-800 flex-1">Informazioni</Text>
                        </View>

                        <View className="gap-4">
                            <InfoRow label="Cliente" value={client} />
                            <InfoRow label="Indirizzo" value={constructionSite?.address} />
                            <InfoRow label="CIG" value={constructionSite?.cig} isCode={true} />
                            <InfoRow label="CUP" value={constructionSite?.cup} isCode={true} />
                            <InfoRow 
                                label="% Ribasso" 
                                value={constructionSite?.reduction ? `${constructionSite.reduction} %` : undefined} 
                                isLast={true} 
                            />
                        </View>
                    </View>

                    {/* Subactivities */}
                    {subactivities && subactivities.length > 0 && (
                        <View className="mb-6">
                            <Text className="text-slate-800 text-xl font-bold mb-4 px-2">Sottocommesse</Text>
                            
                            <View className="gap-3">
                                {subactivities.map((sub: any, index: number) => {
                                    const hasCodes = sub.cig || sub.cup;
                                    return (
                                        <View key={index} className="bg-white p-5 rounded-2xl shadow-sm border border-slate-100">
                                            <View className={`flex-row items-center ${hasCodes ? 'mb-3 border-b border-slate-50 pb-3' : ''}`}>
                                                <View className="bg-slate-50 p-2 rounded-lg mr-3">
                                                    <FileText size={20} color="#64748b" />
                                                </View>
                                                <Text selectable={true} className="text-slate-800 font-bold text-sm uppercase flex-1 leading-tight">
                                                    {sub.code} - {sub.description}
                                                </Text>
                                            </View>
                                            
                                            {hasCodes && (
                                                <View className="gap-2 px-2">
                                                {sub.cig && (
                                                    <View className="flex-row justify-between items-center">
                                                        <Text className="text-slate-500 text-xs font-medium">CIG</Text>
                                                        <Text selectable={true} className="text-primary-dark font-bold text-sm tracking-widest">{sub.cig}</Text>
                                                    </View>
                                                )}
                                                {sub.cup && (
                                                    <View className="flex-row justify-between items-center">
                                                        <Text className="text-slate-500 text-xs font-medium">CUP</Text>
                                                        <Text selectable={true} className="text-primary-dark font-bold text-sm tracking-widest">{sub.cup}</Text>
                                                    </View>
                                                )}
                                            </View>
                                        )}
                                    </View>
                                    );
                                })}
                            </View>
                        </View>
                    )}
                </ScrollView>
            </View>
        </View>
    );
}