import { Ionicons } from "@expo/vector-icons";
import * as ImagePicker from "expo-image-picker";
import { router } from "expo-router";
import { useState } from "react";
import { Alert, Linking, Pressable, ScrollView, View } from "react-native";
import { useTranslation } from "react-i18next";
import { BiometricRow, LoyaltyStrip, QuickActions } from "@/components/profile";
import { Avatar } from "@/components/ui/Avatar";
import { Badge } from "@/components/ui/Badge";
import { Button } from "@/components/ui/Button";
import { Card, MenuRow } from "@/components/ui/Card";
import { Field } from "@/components/ui/Field";
import { AppHeader } from "@/components/ui/Header";
import { Screen } from "@/components/ui/Screen";
import { Text } from "@/components/ui/Text";
import { routes } from "@/lib/routes";
import { useAuthStore, type AuthProvider } from "@/lib/stores/authStore";
import { useLangStore } from "@/lib/stores/langStore";
import { useLocationStore } from "@/lib/stores/locationStore";
import { usePrefsStore } from "@/lib/stores/prefsStore";
import { useProfileModeStore } from "@/lib/stores/profileModeStore";
import { paymentLabel } from "@/components/checkout/PaymentMethodList";
import { colors, gutter } from "@/lib/theme";
import { CALL_PHONE, CHATWOOT_BASE, WHATSAPP_NUMBER } from "@/lib/utils";

export default function ProfileScreen() {
  const { t } = useTranslation();
  const user = useAuthStore((s) => s.user);
  const setAvatar = useAuthStore((s) => s.setAvatar);
  const updateProfile = useAuthStore((s) => s.updateProfile);
  const setBiometric = useAuthStore((s) => s.setBiometric);
  const signOut = useAuthStore((s) => s.signOut);
  const setHasOnboarded = useAuthStore((s) => s.setHasOnboarded);
  const mode = useProfileModeStore((s) => s.mode);
  const membership = useProfileModeStore((s) => s.activeMembership());
  const language = useLangStore((s) => s.language);
  const setLanguage = useLangStore((s) => s.setLanguage);
  const payment = useLocationStore((s) => s.paymentPreference);
  const prefs = usePrefsStore();

  const [editing, setEditing] = useState(false);
  const [name, setName] = useState(user?.name ?? "");
  const [phone, setPhone] = useState(user?.phone ?? "");
  const [email, setEmail] = useState(user?.email ?? "");

  const pickAvatar = async () => {
    const permission = await ImagePicker.requestMediaLibraryPermissionsAsync();
    if (!permission.granted) {
      Alert.alert(
        "Photo access needed",
        "Allow photo library access to set your profile picture."
      );
      return;
    }
    const result = await ImagePicker.launchImageLibraryAsync({
      mediaTypes: ["images"],
      allowsEditing: true,
      aspect: [1, 1],
      quality: 0.85,
    });
    if (!result.canceled && result.assets[0]?.uri) {
      setAvatar(result.assets[0].uri);
    }
  };

  const takePhoto = async () => {
    const permission = await ImagePicker.requestCameraPermissionsAsync();
    if (!permission.granted) {
      Alert.alert("Camera access needed", "Allow camera access to take a profile photo.");
      return;
    }
    const result = await ImagePicker.launchCameraAsync({
      allowsEditing: true,
      aspect: [1, 1],
      quality: 0.85,
    });
    if (!result.canceled && result.assets[0]?.uri) {
      setAvatar(result.assets[0].uri);
    }
  };

  const changePhoto = () => {
    Alert.alert("Profile photo", "Choose how you'd like to update your photo.", [
      { text: "Choose from library", onPress: pickAvatar },
      { text: "Take photo", onPress: takePhoto },
      ...(user?.avatarUri
        ? [{ text: "Remove photo", style: "destructive" as const, onPress: () => setAvatar(null) }]
        : []),
      { text: "Cancel", style: "cancel" },
    ]);
  };

  const links: {
    label: string;
    href: string;
    icon: keyof typeof Ionicons.glyphMap;
    subtitle?: string;
  }[] = [
    { label: t("common.switchProfile"), href: routes.profileSwitch, icon: "swap-horizontal", subtitle: mode },
    { label: t("common.joinOrg"), href: routes.profileJoin, icon: "business-outline" },
    { label: t("common.orders"), href: routes.orders, icon: "receipt-outline", subtitle: "Track delivery" },
    {
      label: "Payment methods",
      href: routes.paymentMethods,
      icon: "card-outline",
      subtitle: paymentLabel(payment),
    },
    {
      label: "Notification preferences",
      href: routes.notificationPrefs,
      icon: "notifications-outline",
      subtitle: [
        prefs.push ? "Push" : null,
        prefs.sms ? "SMS" : null,
        prefs.email ? "Email" : null,
      ]
        .filter(Boolean)
        .join(" · ") || "All off",
    },
    { label: t("common.notifications"), href: routes.notifications, icon: "mail-unread-outline", subtitle: "Alerts inbox" },
    { label: t("common.prescriptions"), href: routes.rxList, icon: "medkit-outline", subtitle: "Rx + family" },
    { label: t("common.loyalty"), href: routes.loyalty, icon: "star-outline", subtitle: `${user?.points ?? 0} pts` },
    { label: t("common.subscriptions"), href: routes.subscriptions, icon: "repeat-outline" },
    { label: t("common.emergencyContacts"), href: routes.emergencyContacts, icon: "alert-circle-outline" },
    { label: t("common.branches"), href: routes.branches, icon: "location-outline" },
    { label: t("common.addresses"), href: routes.addresses, icon: "home-outline" },
    { label: t("common.about"), href: routes.about, icon: "information-circle-outline" },
    { label: t("common.contact"), href: routes.contact, icon: "mail-outline" },
  ];

  return (
    <Screen>
      <AppHeader title={t("common.profile")} subtitle="Account and preferences" />
      <ScrollView
        showsVerticalScrollIndicator={false}
        contentContainerStyle={{
          paddingBottom: 40,
          paddingHorizontal: gutter,
        }}
      >
        <Card style={{ marginTop: 4 }}>
          <View style={{ flexDirection: "row", alignItems: "center", gap: 14 }}>
            <Pressable onPress={changePhoto}>
              <View>
                <Avatar name={user?.name} uri={user?.avatarUri} size={72} />
                <View
                  style={{
                    position: "absolute",
                    right: -2,
                    bottom: -2,
                    width: 26,
                    height: 26,
                    borderRadius: 13,
                    backgroundColor: colors.brand,
                    borderWidth: 2,
                    borderColor: colors.surface,
                    alignItems: "center",
                    justifyContent: "center",
                  }}
                >
                  <Ionicons name="camera" size={13} color={colors.ink} />
                </View>
              </View>
            </Pressable>
            <View style={{ flex: 1 }}>
              <Text variant="h2">{user?.name || "Guest"}</Text>
              <Text variant="bodySm" color={colors.muted} style={{ marginTop: 2 }}>
                {user?.phone || "—"}
              </Text>
              {user?.email ? (
                <Text variant="caption" color={colors.subtle} style={{ marginTop: 2 }}>
                  {user.email}
                </Text>
              ) : null}
              <View style={{ flexDirection: "row", gap: 8, marginTop: 8, flexWrap: "wrap" }}>
                {user?.authProvider && user.authProvider !== "guest" ? (
                  <Badge label={providerLabel(user.authProvider)} tone="info" />
                ) : null}
                <Badge
                  label={
                    mode === "corporate"
                      ? membership?.orgName || t("common.corporate")
                      : t("common.personal")
                  }
                  tone="brand"
                />
                {user?.isGuest ? <Badge label="Guest" tone="neutral" /> : null}
              </View>
            </View>
          </View>
          <View style={{ flexDirection: "row", gap: 12, marginTop: 14 }}>
            <Pressable onPress={changePhoto}>
              <Text variant="label" color={colors.brandText}>
                {user?.avatarUri ? "Change photo" : "Add photo"}
              </Text>
            </Pressable>
            {!user?.isGuest ? (
              <Pressable
                onPress={() => {
                  setName(user?.name ?? "");
                  setPhone(user?.phone ?? "");
                  setEmail(user?.email ?? "");
                  setEditing((v) => !v);
                }}
              >
                <Text variant="label" color={colors.brandText}>
                  {editing ? "Close editor" : "Edit profile"}
                </Text>
              </Pressable>
            ) : (
              <Pressable
                onPress={() => {
                  signOut();
                  setHasOnboarded(false);
                  router.replace(routes.signIn as never);
                }}
              >
                <Text variant="label" color={colors.brandText}>
                  Sign in / create account
                </Text>
              </Pressable>
            )}
          </View>
          {membership ? (
            <Text variant="caption" color={colors.subtle} style={{ marginTop: 8 }}>
              {membership.planName} · {membership.remainingAllowance} ETB allowance left
            </Text>
          ) : null}
        </Card>

        {!user?.isGuest ? (
          <LoyaltyStrip points={user?.points ?? 0} tier={user?.tier ?? "bronze"} />
        ) : null}

        <QuickActions />

        {editing && !user?.isGuest ? (
          <Card elevated={false} style={{ marginTop: 12 }}>
            <Text variant="h3" style={{ marginBottom: 12 }}>
              Edit profile
            </Text>
            <View style={{ gap: 12 }}>
              <Field label="Full name" value={name} onChangeText={setName} />
              <Field
                label="Phone"
                value={phone}
                onChangeText={setPhone}
                keyboardType="phone-pad"
              />
              <Field
                label="Email"
                value={email}
                onChangeText={setEmail}
                keyboardType="email-address"
                autoCapitalize="none"
              />
              <Button
                title="Save changes"
                onPress={() => {
                  if (!name.trim()) {
                    Alert.alert("Name required");
                    return;
                  }
                  updateProfile({
                    name: name.trim(),
                    phone: phone.trim(),
                    email: email.trim() || undefined,
                  });
                  setEditing(false);
                  Alert.alert("Saved", "Your profile was updated.");
                }}
              />
            </View>
          </Card>
        ) : null}

        {!user?.isGuest ? (
          <Card padded={false} elevated={false} style={{ marginTop: 14, overflow: "hidden" }}>
            <BiometricRow
              enabled={!!user?.biometricEnabled}
              onChange={setBiometric}
            />
          </Card>
        ) : null}

        <View style={{ flexDirection: "row", gap: 8, marginTop: 14 }}>
          {[
            { label: t("common.call"), icon: "call-outline" as const, href: `tel:${CALL_PHONE}` },
            {
              label: t("common.whatsapp"),
              icon: "logo-whatsapp" as const,
              href: `https://wa.me/${WHATSAPP_NUMBER}`,
            },
            { label: t("common.chat"), icon: "chatbubble-ellipses-outline" as const, href: CHATWOOT_BASE },
          ].map((item) => (
            <Pressable
              key={item.label}
              onPress={() => Linking.openURL(item.href)}
              style={{
                flex: 1,
                backgroundColor: colors.surface,
                borderRadius: 16,
                borderWidth: 1,
                borderColor: colors.line,
                paddingVertical: 12,
                alignItems: "center",
                gap: 4,
              }}
            >
              <Ionicons name={item.icon} size={18} color={colors.brandText} />
              <Text variant="micro">{item.label}</Text>
            </Pressable>
          ))}
        </View>

        <Card padded={false} style={{ marginTop: 18, overflow: "hidden" }}>
          <MenuRow
            icon="language-outline"
            title={t("common.language")}
            subtitle={language === "en" ? "English" : "አማርኛ"}
            onPress={() => setLanguage(language === "en" ? "am" : "en")}
            right={
              <Text variant="label" color={colors.brandText}>
                {language.toUpperCase()}
              </Text>
            }
          />
          {links.map((l, index) => (
            <MenuRow
              key={l.href}
              icon={l.icon}
              title={l.label}
              subtitle={l.subtitle}
              onPress={() => router.push(l.href as never)}
              last={index === links.length - 1}
            />
          ))}
        </Card>

        <Card padded={false} style={{ marginTop: 12, overflow: "hidden" }}>
          <MenuRow
            icon="log-out-outline"
            title="Sign out"
            tone="danger"
            last
            onPress={() => {
              signOut();
              setHasOnboarded(false);
              router.replace(routes.welcome);
            }}
          />
        </Card>
      </ScrollView>
    </Screen>
  );
}

function providerLabel(provider: AuthProvider) {
  if (provider === "google") return "Google";
  if (provider === "email") return "Email";
  if (provider === "telegram") return "Telegram";
  if (provider === "phone") return "Phone";
  return "Guest";
}