/*
 * QR 풀스크린 뷰어(SCR-M15 3) — 대형 QR + 이름·유형 + 밝기 부스트 안내.
 * 하단 스와이프 인디케이터로 다른 티켓 전환(좌우 버튼). 예매번호 마스킹 노출.
 * ※ 자동 밝기 상승은 expo-brightness 미설치 → 안내 문구 + 갭 기록(placeholder).
 */
import { Ionicons } from '@expo/vector-icons';
import React from 'react';
import { Modal, Pressable, ScrollView, StyleSheet, Text, View } from 'react-native';
import { colors, radius, spacing, touch, type } from '../../theme';
import { QrPlaceholder } from './QrPlaceholder';
import type { SampleTicket } from './sampleTickets';

export function QrViewerModal({
  visible,
  tickets,
  index,
  onChangeIndex,
  onClose,
}: {
  visible: boolean;
  tickets: SampleTicket[];
  index: number;
  onChangeIndex: (i: number) => void;
  onClose: () => void;
}) {
  const ticket = tickets[index];
  if (!ticket) return null;

  const canPrev = index > 0;
  const canNext = index < tickets.length - 1;

  return (
    <Modal visible={visible} transparent animationType="fade" onRequestClose={onClose}>
      <View style={styles.backdrop}>
        <View style={styles.sheet}>
          {/* 헤더 (그라디언트 대체: 브랜드 딥블루 단색) */}
          <View style={styles.header}>
            <Pressable
              accessibilityRole="button"
              accessibilityLabel="닫기"
              style={styles.closeBtn}
              onPress={onClose}
            >
              <Ionicons name="close" size={24} color={colors.white} />
            </Pressable>
            <Text style={styles.headerTitle}>입장 QR 코드</Text>
            <Text style={styles.headerSub} numberOfLines={1}>
              {ticket.eventName}
            </Text>
          </View>

          <ScrollView contentContainerStyle={styles.content}>
            <QrPlaceholder seed={ticket.qrSeed} size={200} />

            <View style={styles.nameRow}>
              <Text style={styles.holderName}>{ticket.holderName}</Text>
              <Text style={styles.holderType}> {ticket.ticketType}</Text>
            </View>
            <View style={styles.bookingChip}>
              <Text style={styles.bookingText}>{ticket.bookingNoMasked}</Text>
            </View>

            {/* 밝기 부스트 안내 */}
            <View style={styles.hint}>
              <Ionicons name="bulb-outline" size={20} color={colors.primary600} />
              <Text style={styles.hintText}>
                입장 시 화면을 <Text style={styles.hintBold}>최대 밝기</Text>로 유지하세요
              </Text>
            </View>

            {/* 스와이프(버튼) 전환 */}
            {tickets.length > 1 ? (
              <View style={styles.swipeRow}>
                <Pressable
                  accessibilityLabel="이전 티켓"
                  disabled={!canPrev}
                  onPress={() => onChangeIndex(index - 1)}
                  style={[styles.navBtn, !canPrev && styles.navBtnOff]}
                >
                  <Ionicons name="chevron-back" size={22} color={canPrev ? colors.primary600 : colors.neutral200} />
                </Pressable>
                <View style={styles.dots}>
                  {tickets.map((t, i) => (
                    <View
                      key={t.id}
                      style={[styles.dot, i === index ? styles.dotOn : null]}
                    />
                  ))}
                </View>
                <Pressable
                  accessibilityLabel="다음 티켓"
                  disabled={!canNext}
                  onPress={() => onChangeIndex(index + 1)}
                  style={[styles.navBtn, !canNext && styles.navBtnOff]}
                >
                  <Ionicons name="chevron-forward" size={22} color={canNext ? colors.primary600 : colors.neutral200} />
                </Pressable>
              </View>
            ) : null}
            <Text style={styles.swipeHint}>다른 티켓 보기</Text>
          </ScrollView>
        </View>
      </View>
    </Modal>
  );
}

const styles = StyleSheet.create({
  backdrop: {
    flex: 1,
    backgroundColor: 'rgba(16,24,40,0.6)',
    alignItems: 'center',
    justifyContent: 'center',
    padding: spacing.lg,
  },
  sheet: {
    width: '100%',
    maxWidth: 360,
    backgroundColor: colors.white,
    borderRadius: radius.md,
    overflow: 'hidden',
  },
  header: {
    backgroundColor: colors.primary700,
    paddingVertical: spacing.lg,
    alignItems: 'center',
    gap: 4,
  },
  closeBtn: {
    position: 'absolute',
    top: 8,
    right: 8,
    width: touch.min,
    height: touch.min,
    alignItems: 'center',
    justifyContent: 'center',
  },
  headerTitle: { color: colors.white, fontSize: type.h2.fontSize, fontWeight: '700' },
  headerSub: { color: 'rgba(255,255,255,0.85)', fontSize: type.caption.fontSize, maxWidth: 260 },
  content: { alignItems: 'center', padding: spacing.lg, gap: spacing.md },
  nameRow: { flexDirection: 'row', alignItems: 'baseline' },
  holderName: { fontSize: type.h1.fontSize, fontWeight: '700', color: colors.neutral900 },
  holderType: { fontSize: type.body.fontSize, fontWeight: '500', color: colors.neutral500 },
  bookingChip: {
    backgroundColor: colors.primary050,
    borderRadius: radius.pill,
    paddingHorizontal: 12,
    paddingVertical: 4,
  },
  bookingText: { color: colors.primary700, fontSize: type.caption.fontSize, fontVariant: ['tabular-nums'] },
  hint: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: 8,
    backgroundColor: colors.neutral050,
    borderRadius: radius.md,
    padding: spacing.md,
    width: '100%',
  },
  hintText: { flex: 1, fontSize: type.caption.fontSize, color: colors.neutral700 },
  hintBold: { fontWeight: '700', color: colors.neutral900 },
  swipeRow: { flexDirection: 'row', alignItems: 'center', gap: 12, marginTop: 4 },
  navBtn: {
    width: touch.min,
    height: touch.min,
    borderRadius: radius.sm,
    borderWidth: 1,
    borderColor: colors.neutral200,
    alignItems: 'center',
    justifyContent: 'center',
  },
  navBtnOff: { opacity: 0.5 },
  dots: { flexDirection: 'row', alignItems: 'center', gap: 6 },
  dot: { width: 6, height: 6, borderRadius: 3, backgroundColor: colors.neutral200 },
  dotOn: { width: 20, backgroundColor: colors.primary600 },
  swipeHint: { fontSize: 11, color: colors.neutral500, letterSpacing: 1 },
});