import { FC, useCallback, useState } from "react"
import { Image, ImageStyle, TextStyle, View, ViewStyle } from "react-native"
import * as Application from "expo-application"
import * as WebBrowser from "expo-web-browser"

import { Icon } from "@/components/Icon"
import { ListItem } from "@/components/ListItem"
import { Modal } from "@/components/Modal"
import { Screen } from "@/components/Screen"
import { Text } from "@/components/Text"
import { translate } from "@/i18n/translate"
import { AppStackScreenProps } from "@/navigators/navigationTypes"
import { useAppTheme } from "@/theme/context"
import { $styles } from "@/theme/styles"
import type { ThemedStyle } from "@/theme/types"
import { s } from "@/utils/responsive"
import { useHeader } from "@/utils/useHeader"

const appLogo = require("@assets/images/logo.png")

const usingHermes = typeof HermesInternal === "object" && HermesInternal !== null

export const AboutScreen: FC<AppStackScreenProps<"About">> = function AboutScreen({ navigation }) {
  const { themed, theme } = useAppTheme()
  const [showVersionDetails, setShowVersionDetails] = useState(false)

  // @ts-expect-error
  const usingFabric = global.nativeFabricUIManager != null

  const appVersion = Application.nativeApplicationVersion || "1.0.0"

  const openPrivacyPolicy = useCallback(async () => {
    // TODO: Replace with actual privacy policy URL
    await WebBrowser.openBrowserAsync("https://example.com/privacy")
  }, [])

  const openTermsOfService = useCallback(async () => {
    // TODO: Replace with actual terms of service URL
    await WebBrowser.openBrowserAsync("https://example.com/terms")
  }, [])

  useHeader(
    {
      titleTx: "aboutScreen:title",
      leftIcon: "back",
      onLeftPress: () => navigation.goBack(),
    },
    [],
  )

  return (
    <Screen preset="fixed" contentContainerStyle={$styles.flex1}>
      {/* Logo Section */}
      <View style={themed($logoSection)}>
        <Image style={themed($logo)} source={appLogo} resizeMode="contain" />
        <Text size="lg" weight="medium" style={themed($appName)}>
          {Application.applicationName}
        </Text>
        <Text size="sm" style={themed($versionText)}>
          v{appVersion}
        </Text>
      </View>

      {/* List Items Section */}
      <View style={themed($listContainer)}>
        <ListItem
          tx="aboutScreen:privacyPolicy"
          leftIcon="shield"
          leftIconColor={theme.colors.tint}
          rightIcon="caretRight"
          onPress={openPrivacyPolicy}
        />

        <ListItem
          tx="aboutScreen:termsOfService"
          leftIcon="fileText"
          leftIconColor={theme.colors.tint}
          rightIcon="caretRight"
          onPress={openTermsOfService}
        />

        <ListItem
          tx="aboutScreen:version"
          leftIcon="info"
          leftIconColor={theme.colors.tint}
          RightComponent={
            <View style={$rightContainer}>
              <Text size="xs" style={themed($versionBadge)}>
                v{appVersion}
              </Text>
              <Icon icon="caretRight" size={24} color={theme.colors.textDim} />
            </View>
          }
          onPress={() => setShowVersionDetails(true)}
        />
      </View>

      {/* Version Details Modal */}
      <Modal
        visible={showVersionDetails}
        onClose={() => setShowVersionDetails(false)}
        titleTx="aboutScreen:appInfo"
        confirmButtonProps={{
          tx: "common:ok",
          onPress: () => setShowVersionDetails(false),
        }}
      >
        <View style={themed($infoRow)}>
          <Text size="sm" style={themed($infoLabel)}>
            {translate("aboutScreen:appName")}
          </Text>
          <Text size="sm">{Application.applicationName}</Text>
        </View>

        <View style={themed($infoRow)}>
          <Text size="sm" style={themed($infoLabel)}>
            {translate("aboutScreen:version")}
          </Text>
          <Text size="sm">{Application.nativeApplicationVersion}</Text>
        </View>

        <View style={themed($infoRow)}>
          <Text size="sm" style={themed($infoLabel)}>
            {translate("aboutScreen:buildVersion")}
          </Text>
          <Text size="sm">{Application.nativeBuildVersion}</Text>
        </View>

        <View style={themed($infoRow)}>
          <Text size="sm" style={themed($infoLabel)}>
            {translate("aboutScreen:appId")}
          </Text>
          <Text size="sm" style={themed($infoValue)}>
            {Application.applicationId}
          </Text>
        </View>

        <View style={themed($infoRow)}>
          <Text size="sm" style={themed($infoLabel)}>
            Hermes
          </Text>
          <Text size="sm">{usingHermes ? "Enabled" : "Disabled"}</Text>
        </View>

        <View style={themed($infoRowLast)}>
          <Text size="sm" style={themed($infoLabel)}>
            Fabric
          </Text>
          <Text size="sm">{usingFabric ? "Enabled" : "Disabled"}</Text>
        </View>
      </Modal>
    </Screen>
  )
}

const $logoSection: ThemedStyle<ViewStyle> = ({ spacing }) => ({
  alignItems: "center",
  paddingHorizontal: spacing.lg,
  paddingTop: spacing.xxxl,
  paddingBottom: spacing.xl,
})

const $listContainer: ThemedStyle<ViewStyle> = ({ spacing }) => ({
  flex: 1,
  paddingHorizontal: spacing.lg,
})

const $logo: ThemedStyle<ImageStyle> = ({ spacing }) => ({
  height: s(100),
  width: s(100),
  marginBottom: spacing.md,
})

const $appName: ThemedStyle<TextStyle> = ({ spacing }) => ({
  marginBottom: spacing.xs,
})

const $versionText: ThemedStyle<TextStyle> = ({ colors }) => ({
  color: colors.textDim,
})

const $rightContainer: ViewStyle = {
  flexDirection: "row",
  alignItems: "center",
}

const $versionBadge: ThemedStyle<TextStyle> = ({ colors, spacing }) => ({
  color: colors.textDim,
  marginRight: spacing.xs,
})

const $infoRow: ThemedStyle<ViewStyle> = ({ spacing }) => ({
  flexDirection: "row",
  justifyContent: "space-between",
  alignItems: "center",
  paddingVertical: spacing.sm,
  borderBottomWidth: 1,
  borderBottomColor: "rgba(0,0,0,0.05)",
})

const $infoRowLast: ThemedStyle<ViewStyle> = ({ spacing }) => ({
  flexDirection: "row",
  justifyContent: "space-between",
  alignItems: "center",
  paddingVertical: spacing.sm,
})

const $infoLabel: ThemedStyle<TextStyle> = ({ colors }) => ({
  color: colors.textDim,
  flexShrink: 0,
  marginRight: s(16),
})

const $infoValue: ThemedStyle<TextStyle> = () => ({
  flex: 1,
  textAlign: "right",
})