import { Ionicons } from '@expo/vector-icons';
import { useRouter } from 'expo-router';
import {
  ActivityIndicator,
  Pressable,
  ScrollView,
  StyleSheet,
  Switch,
  Text,
  TextInput,
  View,
} from 'react-native';
import { SafeAreaView } from 'react-native-safe-area-context';
import { useDndSetting } from '../../../src/hooks';
import { colors } from '../../../src/theme';

/* ===================== 子组件：顶部导航 ===================== */

function Header({ onBack }: { onBack: () => void }) {
  return (
    <View style={styles.header}>
      <Pressable style={styles.headerBtn} onPress={onBack} hitSlop={8}>
        <Ionicons name="chevron-back" size={24} color={colors.textPrimary} />
      </Pressable>
      <Text style={styles.headerTitle}>勿扰模式</Text>
      <View style={styles.headerBtn} />
    </View>
  );
}

/* ===================== 子组件：时间输入行 ===================== */

function TimeRow({
  label,
  value,
  onChange,
}: {
  label: string;
  value: string;
  onChange: (text: string) => void;
}) {
  return (
    <View style={styles.row}>
      <Text style={styles.rowTitle}>{label}</Text>
      <TextInput
        style={styles.timeInput}
        value={value}
        onChangeText={onChange}
        placeholder="00:00"
        placeholderTextColor={colors.textHint}
        keyboardType="numbers-and-punctuation"
      />
    </View>
  );
}

/* ===================== 页面 ===================== */

export default function DndSettingScreen() {
  const router = useRouter();
  const { setting, loading, error, refresh, update } = useDndSetting();

  if (loading) {
    return (
      <SafeAreaView style={styles.safeArea} edges={['top']}>
        <Header onBack={() => router.back()} />
        <View style={styles.stateBox}>
          <ActivityIndicator size="large" color={colors.primary} />
        </View>
      </SafeAreaView>
    );
  }

  if (error || !setting) {
    return (
      <SafeAreaView style={styles.safeArea} edges={['top']}>
        <Header onBack={() => router.back()} />
        <View style={styles.stateBox}>
          <Ionicons name="alert-circle-outline" size={40} color={colors.danger} />
          <Text style={styles.stateText}>加载失败，请重试</Text>
          <Pressable style={styles.retryBtn} onPress={refresh}>
            <Text style={styles.retryText}>重试</Text>
          </Pressable>
        </View>
      </SafeAreaView>
    );
  }

  return (
    <SafeAreaView style={styles.safeArea} edges={['top', 'bottom']}>
      <Header onBack={() => router.back()} />
      <ScrollView
        style={styles.scroll}
        contentContainerStyle={styles.content}
        showsVerticalScrollIndicator={false}
      >
        <View style={[styles.statCard, { backgroundColor: colors.primaryLight }]}>
          <Text style={[styles.statValue, { color: colors.primary }]}>{setting.blockedCount}</Text>
          <Text style={styles.statLabel}>累计拦截的通知条数</Text>
        </View>

        <View style={styles.section}>
          <Text style={styles.sectionTitle}>基础设置</Text>
          <View style={styles.card}>
            <View style={[styles.row, styles.rowBorder]}>
              <View style={styles.rowBody}>
                <Text style={styles.rowTitle}>开启勿扰模式</Text>
              </View>
              <Switch
                value={setting.enabled}
                onValueChange={(next) => update({ enabled: next })}
                trackColor={{ false: colors.border, true: colors.primaryBorder }}
                thumbColor={setting.enabled ? colors.primary : colors.white}
              />
            </View>
            <TimeRow
              label="开始时间"
              value={setting.startTime}
              onChange={(text) => update({ startTime: text })}
            />
            <View style={styles.rowBorder} />
            <TimeRow
              label="结束时间"
              value={setting.endTime}
              onChange={(text) => update({ endTime: text })}
            />
          </View>
        </View>

        <View style={styles.section}>
          <Text style={styles.sectionTitle}>高级设置</Text>
          <View style={styles.card}>
            <View style={styles.row}>
              <View style={styles.rowBody}>
                <Text style={styles.rowTitle}>允许重要通知穿透</Text>
                <Text style={styles.rowDesc}>面试邀约等与企业的重要沟通仍会提醒你</Text>
              </View>
              <Switch
                value={setting.allowUrgent}
                onValueChange={(next) => update({ allowUrgent: next })}
                trackColor={{ false: colors.border, true: colors.primaryBorder }}
                thumbColor={setting.allowUrgent ? colors.primary : colors.white}
              />
            </View>
          </View>
        </View>

        <View style={styles.noteCard}>
          <Ionicons name="information-circle-outline" size={18} color={colors.info} />
          <Text style={styles.noteText}>
            开启勿扰模式后，{setting.startTime} 至 {setting.endTime} 期间的非重要通知将被静音。你仍可在「企业沟通」中查看错过的消息。
          </Text>
        </View>
      </ScrollView>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  safeArea: {
    flex: 1,
    backgroundColor: colors.pageBg,
  },
  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingHorizontal: 8,
    height: 48,
    backgroundColor: colors.white,
    borderBottomWidth: 1,
    borderBottomColor: colors.borderLight,
  },
  headerBtn: {
    width: 40,
    height: 40,
    alignItems: 'center',
    justifyContent: 'center',
  },
  headerTitle: {
    flex: 1,
    textAlign: 'center',
    fontSize: 17,
    fontWeight: '700',
    color: colors.textPrimary,
  },
  scroll: {
    flex: 1,
  },
  content: {
    padding: 12,
    paddingBottom: 24,
  },
  stateBox: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    gap: 12,
  },
  stateText: {
    marginTop: 12,
    fontSize: 14,
    color: colors.textSecondary,
  },
  retryBtn: {
    marginTop: 16,
    paddingHorizontal: 24,
    paddingVertical: 8,
    borderRadius: 18,
    backgroundColor: colors.primaryBtn,
  },
  retryText: {
    fontSize: 13,
    fontWeight: '600',
    color: colors.white,
  },
  statCard: {
    borderRadius: 12,
    padding: 20,
    alignItems: 'center',
    marginBottom: 16,
  },
  statValue: {
    fontSize: 32,
    fontWeight: '800',
  },
  statLabel: {
    marginTop: 4,
    fontSize: 13,
    color: colors.textSecondary,
  },
  section: {
    marginBottom: 16,
  },
  sectionTitle: {
    fontSize: 14,
    fontWeight: '700',
    color: colors.textPrimary,
    marginBottom: 10,
  },
  card: {
    backgroundColor: colors.white,
    borderRadius: 12,
    overflow: 'hidden',
  },
  row: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingHorizontal: 14,
    paddingVertical: 14,
  },
  rowBorder: {
    borderBottomWidth: 1,
    borderBottomColor: colors.borderLight,
  },
  rowBody: {
    flex: 1,
    marginRight: 12,
  },
  rowTitle: {
    fontSize: 15,
    fontWeight: '600',
    color: colors.textPrimary,
  },
  rowDesc: {
    marginTop: 3,
    fontSize: 12,
    lineHeight: 16,
    color: colors.textSecondary,
  },
  timeInput: {
    minWidth: 64,
    textAlign: 'right',
    fontSize: 15,
    fontWeight: '600',
    color: colors.primary,
    paddingVertical: 4,
    paddingHorizontal: 8,
  },
  noteCard: {
    flexDirection: 'row',
    alignItems: 'flex-start',
    backgroundColor: colors.white,
    borderRadius: 12,
    padding: 14,
    gap: 8,
  },
  noteText: {
    flex: 1,
    fontSize: 12,
    lineHeight: 18,
    color: colors.textSecondary,
  },
});