import { BlurView } from "expo-blur";
import { useEffect, useMemo, useRef, useState } from "react";
import {
  Animated,
  Easing,
  ScrollView,
  StyleSheet,
  TVFocusGuideView,
  View,
} from "react-native";
import { Text } from "@/components/common/Text";
import { useScaledTVTypography } from "@/constants/TVTypography";
import { TVCancelButton } from "./TVCancelButton";
import { TVOptionCard } from "./TVOptionCard";

export type TVOptionItem<T> = {
  label: string;
  sublabel?: string;
  value: T;
  selected: boolean;
};

export interface TVOptionSelectorProps<T> {
  visible: boolean;
  title: string;
  options: TVOptionItem<T>[];
  onSelect: (value: T) => void;
  onClose: () => void;
  cancelLabel?: string;
  cardWidth?: number;
  cardHeight?: number;
}

export const TVOptionSelector = <T,>({
  visible,
  title,
  options,
  onSelect,
  onClose,
  cancelLabel = "Cancel",
  cardWidth = 160,
  cardHeight = 75,
}: TVOptionSelectorProps<T>) => {
  const typography = useScaledTVTypography();
  const [isReady, setIsReady] = useState(false);
  const firstCardRef = useRef<View>(null);

  const overlayOpacity = useRef(new Animated.Value(0)).current;
  const sheetTranslateY = useRef(new Animated.Value(200)).current;

  const initialSelectedIndex = useMemo(() => {
    const idx = options.findIndex((o) => o.selected);
    return idx >= 0 ? idx : 0;
  }, [options]);

  useEffect(() => {
    if (visible) {
      overlayOpacity.setValue(0);
      sheetTranslateY.setValue(200);

      Animated.parallel([
        Animated.timing(overlayOpacity, {
          toValue: 1,
          duration: 250,
          easing: Easing.out(Easing.quad),
          useNativeDriver: true,
        }),
        Animated.timing(sheetTranslateY, {
          toValue: 0,
          duration: 300,
          easing: Easing.out(Easing.cubic),
          useNativeDriver: true,
        }),
      ]).start();
    }
  }, [visible, overlayOpacity, sheetTranslateY]);

  useEffect(() => {
    if (visible) {
      const timer = setTimeout(() => setIsReady(true), 100);
      return () => clearTimeout(timer);
    }
    setIsReady(false);
  }, [visible]);

  useEffect(() => {
    if (isReady && firstCardRef.current) {
      const timer = setTimeout(() => {
        (firstCardRef.current as any)?.requestTVFocus?.();
      }, 50);
      return () => clearTimeout(timer);
    }
  }, [isReady]);

  const styles = useMemo(() => createStyles(typography), [typography]);

  if (!visible) return null;

  return (
    <Animated.View style={[styles.overlay, { opacity: overlayOpacity }]}>
      <Animated.View
        style={[
          styles.sheetContainer,
          { transform: [{ translateY: sheetTranslateY }] },
        ]}
      >
        <BlurView intensity={80} tint='dark' style={styles.blurContainer}>
          <TVFocusGuideView
            autoFocus
            trapFocusUp
            trapFocusDown
            trapFocusLeft
            trapFocusRight
            style={styles.content}
          >
            <Text style={styles.title}>{title}</Text>
            {isReady && (
              <ScrollView
                horizontal
                showsHorizontalScrollIndicator={false}
                style={styles.scrollView}
                contentContainerStyle={styles.scrollContent}
              >
                {options.map((option, index) => (
                  <TVOptionCard
                    key={index}
                    ref={
                      index === initialSelectedIndex ? firstCardRef : undefined
                    }
                    label={option.label}
                    sublabel={option.sublabel}
                    selected={option.selected}
                    hasTVPreferredFocus={index === initialSelectedIndex}
                    onPress={() => {
                      onSelect(option.value);
                      onClose();
                    }}
                    width={cardWidth}
                    height={cardHeight}
                  />
                ))}
              </ScrollView>
            )}

            {isReady && (
              <View style={styles.cancelButtonContainer}>
                <TVCancelButton onPress={onClose} label={cancelLabel} />
              </View>
            )}
          </TVFocusGuideView>
        </BlurView>
      </Animated.View>
    </Animated.View>
  );
};

const createStyles = (typography: ReturnType<typeof useScaledTVTypography>) =>
  StyleSheet.create({
    overlay: {
      position: "absolute",
      top: 0,
      left: 0,
      right: 0,
      bottom: 0,
      backgroundColor: "rgba(0, 0, 0, 0.5)",
      justifyContent: "flex-end",
      zIndex: 1000,
    },
    sheetContainer: {
      width: "100%",
    },
    blurContainer: {
      borderTopLeftRadius: 24,
      borderTopRightRadius: 24,
      overflow: "hidden",
    },
    content: {
      paddingTop: 24,
      paddingBottom: 50,
      overflow: "visible",
    },
    title: {
      fontSize: typography.callout,
      fontWeight: "500",
      color: "rgba(255,255,255,0.6)",
      marginBottom: 16,
      paddingHorizontal: 48,
      textTransform: "uppercase",
      letterSpacing: 1,
    },
    scrollView: {
      overflow: "visible",
    },
    scrollContent: {
      paddingHorizontal: 48,
      paddingVertical: 20,
      gap: 12,
    },
    cancelButtonContainer: {
      marginTop: 16,
      paddingHorizontal: 48,
      alignItems: "flex-start",
    },
  });