/**
 * TabataFit Privacy Policy Screen
 * Required for App Store submission
 */

import React from 'react'
import { View, ScrollView, StyleSheet, Text, Pressable } from 'react-native'
import { useSafeAreaInsets } from 'react-native-safe-area-context'
import { useRouter } from 'expo-router'
import { Icon } from '@/src/shared/components/Icon'

import { useTranslation } from 'react-i18next'
import { useHaptics } from '@/src/shared/hooks'
import { darkColors, BRAND } from '@/src/shared/theme'
import { SPACING } from '@/src/shared/constants/spacing'
import { TYPOGRAPHY } from '@/src/shared/constants/typography'

export default function PrivacyPolicyScreen() {
  const { t } = useTranslation('screens')
  const router = useRouter()
  const insets = useSafeAreaInsets()
  const haptics = useHaptics()

  const handleClose = () => {
    haptics.selection()
    router.back()
  }

  return (
    <View style={[styles.container, { paddingTop: insets.top }]}>
      {/* Header */}
      <View style={styles.header}>
        <Pressable style={styles.backButton} onPress={handleClose}>
          <Icon name="chevron.left" size={28} color={darkColors.text.primary} />
        </Pressable>
        <Text style={styles.headerTitle}>{t('privacy.title')}</Text>
        <View style={{ width: 44 }} />
      </View>

      <ScrollView
        style={styles.scrollView}
        contentContainerStyle={[
          styles.content,
          { paddingBottom: insets.bottom + 40 },
        ]}
        showsVerticalScrollIndicator={false}
      >
        <Section title={t('privacy.lastUpdated')} />

        <Section title={t('privacy.intro.title')}>
          <Paragraph>{t('privacy.intro.content')}</Paragraph>
        </Section>

        <Section title={t('privacy.dataCollection.title')}>
          <Paragraph>{t('privacy.dataCollection.content')}</Paragraph>
          <BulletList
            items={[
              t('privacy.dataCollection.items.workouts'),
              t('privacy.dataCollection.items.settings'),
              t('privacy.dataCollection.items.device'),
            ]}
          />
        </Section>

        <Section title={t('privacy.usage.title')}>
          <Paragraph>{t('privacy.usage.content')}</Paragraph>
        </Section>

        <Section title={t('privacy.sharing.title')}>
          <Paragraph>{t('privacy.sharing.content')}</Paragraph>
        </Section>

        <Section title={t('privacy.security.title')}>
          <Paragraph>{t('privacy.security.content')}</Paragraph>
        </Section>

        <Section title={t('privacy.rights.title')}>
          <Paragraph>{t('privacy.rights.content')}</Paragraph>
        </Section>

        <Section title={t('privacy.contact.title')}>
          <Paragraph>{t('privacy.contact.content')}</Paragraph>
          <Text style={styles.email}>privacy@tabatafit.app</Text>
        </Section>

        <View style={styles.footer}>
          <Text style={styles.footerText}>
            TabataFit v1.0.0
          </Text>
        </View>
      </ScrollView>
    </View>
  )
}

// ═══════════════════════════════════════════════════════════════════════════
// HELPER COMPONENTS
// ═══════════════════════════════════════════════════════════════════════════

function Section({
  title,
  children,
}: {
  title: string
  children?: React.ReactNode
}) {
  return (
    <View style={styles.section}>
      <Text style={styles.sectionTitle}>{title}</Text>
      {children}
    </View>
  )
}

function Paragraph({ children }: { children: string }) {
  return <Text style={styles.paragraph}>{children}</Text>
}

function BulletList({ items }: { items: string[] }) {
  return (
    <View style={styles.bulletList}>
      {items.map((item, index) => (
        <View key={index} style={styles.bulletItem}>
          <Text style={styles.bullet}>•</Text>
          <Text style={styles.bulletText}>{item}</Text>
        </View>
      ))}
    </View>
  )
}

// ═══════════════════════════════════════════════════════════════════════════
// STYLES
// ═══════════════════════════════════════════════════════════════════════════

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: darkColors.bg.base,
  },
  header: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    paddingHorizontal: SPACING[4],
    paddingVertical: SPACING[3],
    borderBottomWidth: 1,
    borderBottomColor: darkColors.border.dim,
  },
  backButton: {
    width: 44,
    height: 44,
    alignItems: 'center',
    justifyContent: 'center',
  },
  headerTitle: {
    ...TYPOGRAPHY.HEADLINE,
    color: darkColors.text.primary,
  },
  scrollView: {
    flex: 1,
  },
  content: {
    paddingHorizontal: SPACING[5],
    paddingTop: SPACING[4],
  },
  section: {
    marginBottom: SPACING[6],
  },
  sectionTitle: {
    ...TYPOGRAPHY.TITLE_3,
    fontWeight: '700',
    color: darkColors.text.primary,
    marginBottom: SPACING[3],
  },
  paragraph: {
    ...TYPOGRAPHY.BODY,
    lineHeight: 22,
    color: darkColors.text.secondary,
  },
  bulletList: {
    marginTop: SPACING[3],
  },
  bulletItem: {
    flexDirection: 'row',
    marginBottom: SPACING[2],
  },
  bullet: {
    ...TYPOGRAPHY.BODY,
    color: BRAND.PRIMARY,
    marginRight: SPACING[2],
  },
  bulletText: {
    flex: 1,
    ...TYPOGRAPHY.BODY,
    lineHeight: 22,
    color: darkColors.text.secondary,
  },
  email: {
    ...TYPOGRAPHY.BODY,
    color: BRAND.PRIMARY,
    marginTop: SPACING[2],
  },
  footer: {
    marginTop: SPACING[8],
    alignItems: 'center',
  },
  footerText: {
    fontSize: 13,
    color: darkColors.text.tertiary,
  },
})
