import React, { useState, useEffect, useRef } from 'react';
import { View, Text, Animated, Easing } from 'react-native';
import { useAppTheme } from '@theme';
import { PrimaryButton, LocationRow } from '@components';
import { useAppDispatch, useAppSelector } from '@store';
import {
  respondToOfferThunk,
  clearDeliveryOffer,
} from '@store/commonReducers/delivery';
import { useNavigation } from '@react-navigation/native';
import { NativeStackNavigationProp } from '@react-navigation/native-stack';
import { AppStackParamList } from '@navigation/navigationTypes';
import { RouteNames } from '@utils/constants';
import { formatCurrency } from '@utils/formatters';
import { getStyles } from './newJobRequestScreen.styles';

const TOTAL_SECONDS = 15;

export const NewJobRequestScreen: React.FC = () => {
  const { colors } = useAppTheme();
  const styles = getStyles(colors);
  const dispatch = useAppDispatch();
  const navigation =
    useNavigation<NativeStackNavigationProp<AppStackParamList>>();

  // Read from the socket-driven delivery slice
  const currentOffer = useAppSelector(state => state.delivery.currentOffer);
  const respondLoading = useAppSelector(
    state => state.delivery.respondLoading,
  );

  const [secondsLeft, setSecondsLeft] = useState(TOTAL_SECONDS);

  // Animated values
  const pulseAnim = useRef(new Animated.Value(1)).current;

  // ── Countdown timer ──────────────────────────────────────────────────────
  useEffect(() => {
    if (secondsLeft <= 0) {
      handleReject();
      return;
    }
    const timer = setInterval(() => {
      setSecondsLeft(prev => prev - 1);
    }, 1000);
    return () => clearInterval(timer);
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [secondsLeft]);

  // ── Pulse animation on Accept button when < 5 s remain ──────────────────
  useEffect(() => {
    if (secondsLeft <= 5 && secondsLeft > 0) {
      Animated.loop(
        Animated.sequence([
          Animated.timing(pulseAnim, {
            toValue: 1.06,
            duration: 400,
            easing: Easing.inOut(Easing.ease),
            useNativeDriver: true,
          }),
          Animated.timing(pulseAnim, {
            toValue: 1,
            duration: 400,
            easing: Easing.inOut(Easing.ease),
            useNativeDriver: true,
          }),
        ]),
      ).start();
    } else {
      pulseAnim.setValue(1);
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [secondsLeft <= 5]);

  // ── Handlers ─────────────────────────────────────────────────────────────
  const handleAccept = () => {
    if (!currentOffer) return;
    dispatch(
      respondToOfferThunk({
        deliveryId: currentOffer.deliveryId,
        action: 'ACCEPT',
      }),
    )
      .unwrap()
      .then(() => {
        navigation.navigate(RouteNames.OrderAccepted);
      })
      .catch(() => {
        // stay on screen — respondError will be set in redux
      });
  };

  const handleReject = () => {
    if (currentOffer) {
      dispatch(
        respondToOfferThunk({
          deliveryId: currentOffer.deliveryId,
          action: 'REJECT',
        }),
      );
    }
    dispatch(clearDeliveryOffer());
    navigation.navigate(RouteNames.BottomTabs, {
      screen: RouteNames.Dashboard,
    });
  };

  if (!currentOffer) return null;

  // Timer text color: warning when < 5s
  const timerColor = secondsLeft <= 5 ? colors.error : colors.primary;
  const timerBorderColor =
    secondsLeft <= 5 ? colors.error : colors.primary;

  return (
    <View style={styles.container}>
      <View style={styles.modalContent}>
        {/* ── Header Row ─────────────────────────────────────────────────── */}
        <View style={styles.headerRow}>
          <Text style={styles.modalTitle}>New Delivery Request</Text>

          {/* Circular countdown timer (pure RN — no SVG needed) */}
          <View
            style={[
              styles.timerWrapper,
              { borderColor: timerBorderColor },
            ]}
          >
            <Text style={[styles.timerText, { color: timerColor }]}>
              {secondsLeft}s
            </Text>
          </View>
        </View>

        {/* ── Earnings Badge ─────────────────────────────────────────────── */}
        <View
          style={[
            styles.earningsBadge,
            { backgroundColor: colors.primary },
          ]}
        >
          <Text style={styles.earningsBadgeLabel}>Estimated Earnings</Text>
          <Text style={styles.earningsBadgeValue}>
            {formatCurrency(currentOffer.totalAmount)}
          </Text>
        </View>

        {/* ── Route Details ──────────────────────────────────────────────── */}
        <View style={styles.routeContainer}>
          <LocationRow
            type="pickup"
            name="Pickup Location"
            address={currentOffer.pickupAddress.label}
          />
          <View style={styles.spacer} />
          <LocationRow
            type="drop"
            name="Drop Location"
            address={currentOffer.dropAddress.label}
          />
        </View>

        {/* ── Distance & Order ID ────────────────────────────────────────── */}
        <View style={styles.detailsRow}>
          <View style={styles.detailBox}>
            <Text style={styles.detailLabel}>Distance</Text>
            <Text style={styles.detailValue}>
              {currentOffer.distanceKm} km
            </Text>
          </View>

          <View style={styles.divider} />

          <View style={styles.detailBox}>
            <Text style={styles.detailLabel}>Order</Text>
            <Text style={styles.detailValue}>#{currentOffer.orderId}</Text>
          </View>
        </View>

        {/* ── Action Buttons ─────────────────────────────────────────────── */}
        <View style={styles.btnRow}>
          <PrimaryButton
            title="Reject"
            onPress={handleReject}
            style={styles.rejectBtn}
            textStyle={{ color: colors.text }}
            disabled={respondLoading}
          />
          <Animated.View
            style={[{ flex: 2, transform: [{ scale: pulseAnim }] }]}
          >
            <PrimaryButton
              title={respondLoading ? 'Accepting...' : 'Accept'}
              onPress={handleAccept}
              style={[styles.acceptBtn, { flex: undefined }]}
              disabled={respondLoading}
            />
          </Animated.View>
        </View>
      </View>
    </View>
  );
};

export default NewJobRequestScreen;