import { View, Text, StyleSheet, FlatList, TouchableOpacity, ActivityIndicator } from "react-native";
import { useLocalSearchParams, useRouter } from "expo-router";
import { useEffect, useState } from "react";
import { supabase } from "../../src/lib/supabase";
import { usePacksStore } from "../../src/store";
import { Ionicons } from "@expo/vector-icons";
import { Question } from "../../src/types";

export default function PackDetailsScreen() {
    const { id } = useLocalSearchParams();
    const router = useRouter();
    const { packs, fetchPacks } = usePacksStore();
    const [questions, setQuestions] = useState<Question[]>([]);
    const [isLoading, setIsLoading] = useState(true);

    const pack = packs.find((p) => p.id === id);

    useEffect(() => {
        if (packs.length === 0) {
            fetchPacks();
        }
        fetchPackDetails();
    }, [id]);

    const fetchPackDetails = async () => {
        try {
            const { data, error } = await supabase
                .from("questions")
                .select("*")
                .eq("pack_id", id)
                .order("created_at");

            if (error) throw error;
            setQuestions(data || []);
        } catch (error) {
            console.error("Error fetching questions:", error);
        } finally {
            setIsLoading(false);
        }
    };

    const renderItem = ({ item }: { item: Question }) => (
        <View style={styles.card}>
            <Text style={styles.questionText}>{item.text}</Text>
            {item.partner_text && (
                <Text style={styles.partnerText}>Partner role: {item.partner_text}</Text>
            )}
            <View style={styles.intensityContainer}>
                {[...Array(5)].map((_, index) => (
                    <Ionicons
                        key={index}
                        name="flame"
                        size={12}
                        color={index < item.intensity ? "#e94560" : "#333"}
                        style={{ marginRight: 2 }}
                    />
                ))}
            </View>
        </View>
    );

    if (isLoading) {
        return (
            <View style={styles.loadingContainer}>
                <ActivityIndicator size="large" color="#e94560" />
            </View>
        );
    }

    return (
        <View style={styles.container}>
            <View style={styles.header}>
                <TouchableOpacity onPress={() => router.back()} style={styles.backButton}>
                    <Ionicons name="arrow-back" size={24} color="#fff" />
                </TouchableOpacity>
                <Text style={styles.title}>{pack?.name || "Pack Details"}</Text>
                <View style={{ width: 24 }} />
            </View>

            {pack && (
                <View style={styles.packInfo}>
                    <View style={styles.iconContainer}>
                        <Text style={styles.emoji}>{pack.icon || "📦"}</Text>
                    </View>
                    <Text style={styles.description}>{pack.description}</Text>
                </View>
            )}

            <View style={styles.sectionHeader}>
                <Text style={styles.sectionTitle}>Questions ({questions.length})</Text>
            </View>

            <FlatList
                data={questions}
                renderItem={renderItem}
                keyExtractor={(item) => item.id}
                contentContainerStyle={styles.list}
            />
        </View>
    );
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        backgroundColor: "#1a1a2e",
    },
    loadingContainer: {
        flex: 1,
        justifyContent: "center",
        alignItems: "center",
        backgroundColor: "#1a1a2e",
    },
    header: {
        paddingTop: 60,
        paddingHorizontal: 24,
        paddingBottom: 24,
        flexDirection: "row",
        alignItems: "center",
        justifyContent: "space-between",
        borderBottomWidth: 1,
        borderBottomColor: "#16213e",
    },
    backButton: {
        padding: 4,
    },
    title: {
        fontSize: 20,
        fontWeight: "bold",
        color: "#fff",
    },
    packInfo: {
        padding: 24,
        alignItems: "center",
        borderBottomWidth: 1,
        borderBottomColor: "#16213e",
    },
    iconContainer: {
        width: 64,
        height: 64,
        borderRadius: 32,
        backgroundColor: "rgba(255, 255, 255, 0.05)",
        justifyContent: "center",
        alignItems: "center",
        marginBottom: 16,
    },
    emoji: {
        fontSize: 32,
    },
    description: {
        fontSize: 16,
        color: "#ccc",
        textAlign: "center",
        lineHeight: 24,
    },
    sectionHeader: {
        padding: 24,
        paddingBottom: 8,
    },
    sectionTitle: {
        fontSize: 18,
        fontWeight: "bold",
        color: "#e94560",
    },
    list: {
        padding: 24,
    },
    card: {
        backgroundColor: "#16213e",
        borderRadius: 12,
        padding: 16,
        marginBottom: 12,
        borderWidth: 1,
        borderColor: "#0f3460",
    },
    questionText: {
        fontSize: 16,
        color: "#fff",
        marginBottom: 8,
        lineHeight: 22,
    },
    intensityContainer: {
        flexDirection: "row",
    },
    partnerText: {
        fontSize: 14,
        color: "#aaa",
        fontStyle: "italic",
        marginBottom: 8,
    },
});