import React from "react";
import {
  View,
  Text,
  StyleSheet,
  Image,
  TouchableOpacity,
  ScrollView,
} from "react-native";
import { MaterialIcons } from "@expo/vector-icons";
import LanguageModal from "@/components/Profile/LangaugeModal";
import { useSelector } from "react-redux";
import { AppDispatch, RootState } from "@/store";
import EditIcon from "../../assets/icons/edit.svg";
import { router } from "expo-router";
import { useDispatch } from "react-redux";
import { logout } from "@/store/authSlice";
import * as ImagePicker from "expo-image-picker";
import { useSnackbar } from "@/contexts/Snackbar";
import { AWS, BASE_URL, USER_PROFILE } from "@/constants/config";
import { bytesToMB, handleUpload, updateUserProfile } from "@/utils/User";
import api from "@/services/axiosClient";
import { PresignedUrlDataItem } from "@/utils/User";
import { setUserData } from "@/store/userSlice";
import { Overlay } from "@/components/common/Overlay";

interface PresignedUrlResponse {
  message: string;
  data?: PresignedUrlDataItem[];
}

export default function ProfileScreen() {
  const [isLangaugeModalVisible, setLanguageModalVisible] =
    React.useState(false);
  const { showSnackbar } = useSnackbar();
  const toggleLanguageModal = () => {
    setLanguageModalVisible(!isLangaugeModalVisible);
  };

  const [isUploading, setIsUploading] = React.useState(false);

  const { data } = useSelector((state: RootState) => state.user);

  const userName = data?.name || "User";
  const mobileNumber = data?.mobile || "Not provided";
  const userImageUrl = data?.profile_url;
  const dispatch = useDispatch<AppDispatch>();

  const handleLogout = () => {
    dispatch(logout());
    router.replace("/auth/login");
  };

  const uploadImage = async (fileName: string, uri: string) => {
    try {
      setIsUploading(true);
      const getPresignedUrl = `${BASE_URL}/api/v1/generate-presigned-urls`;

      const response = await api.post<PresignedUrlResponse>(getPresignedUrl, {
        files: [fileName],
      });

      const uploadData = response?.data?.data?.[0];
      if (!uploadData) throw new Error("Presigned URL not received");

      const { url, fields, originalFileName } = uploadData;
      const presignedUrl: PresignedUrlDataItem = {
        url,
        fields,
        originalFileName,
      };
      await handleUpload(uri, presignedUrl);

      const region = AWS.REGION;
      const bucketName = AWS.BUCKET_NAME;
      const objectKey = presignedUrl.fields.key;

      const uploadedImageUrl = `https://s3.${region}.amazonaws.com/${bucketName}/${encodeURIComponent(
        objectKey
      )}`;

      console.log("Uploaded image URL:", uploadedImageUrl);
      await updateUserProfile({
        profile_url: uploadedImageUrl,
        mobile: mobileNumber,
      });

      dispatch(setUserData({ profile_url: uri }));

      showSnackbar("Image uploaded successfully", "success");
    } catch (error) {
      console.error("Error uploading image:", error);
      showSnackbar("Error uploading image", "error");
    } finally {
      setIsUploading(false);
    }
  };

  const handlePickImage = async () => {
    let result = await ImagePicker.launchImageLibraryAsync({
      mediaTypes: ImagePicker.MediaTypeOptions.Images,
      quality: 1,
      allowsEditing: true,
      aspect: [1, 1],
    });

    if (!result.canceled) {
      const { uri, fileSize } = result.assets[0];
      console.log(uri, "File size:", fileSize);
      if (!fileSize) {
        showSnackbar("Image size is not available", "error");
        return;
      }
      const size = bytesToMB(fileSize);
      if (size > USER_PROFILE.MAX_IMAGE_SIZE_IN_MB) {
        showSnackbar(
          `Image size exceeds ${USER_PROFILE.MAX_IMAGE_SIZE_IN_MB}MB limit`,
          "error"
        );
        throw new Error(
          `Image size exceeds ${USER_PROFILE.MAX_IMAGE_SIZE_IN_MB}MB limit`
        );
      }

      const fileName = uri.split("/").pop() || "image.jpg";
      await uploadImage(fileName, uri);
    }
  };
  return (
    <>
      <ScrollView contentContainerStyle={styles.scrollContent}>
        <View style={styles.avatarContainer}>
          <Image
            source={
              userImageUrl
                ? { uri: userImageUrl }
                : require("@/assets/images/user_image.jpg")
            }
            style={styles.avatar}
          />

          <TouchableOpacity
            style={styles.editAvatar}
            onPress={() => handlePickImage()}
          >
            <EditIcon />
          </TouchableOpacity>
        </View>
        <View style={styles.card}>
          <View style={styles.row}>
            <View style={styles.textGroup}>
              <Text style={styles.label}>Name</Text>
              <Text style={styles.value}>{userName}</Text>
            </View>
            <TouchableOpacity
              onPress={() => {
                router.push("/user/edit_name");
              }}
              style={styles.edit_button}
            >
              <MaterialIcons name="edit" size={20} color="#555C70" />
            </TouchableOpacity>
          </View>
          <View style={styles.divider} />
          <View style={styles.row}>
            <View style={styles.textGroup}>
              <Text style={styles.label}>Mobile Number</Text>
              <Text style={styles.value}>{mobileNumber}</Text>
            </View>
          </View>
        </View>

        <View style={styles.card}>
          {menuItem("My Vehicle")}
          <View style={styles.divider} />
          {menuItem("Language", () => toggleLanguageModal())}
        </View>

        <View style={styles.card}>
          {menuItem("About App")}
          <View style={styles.divider} />
          {menuItem("Logout", handleLogout)}
        </View>
      </ScrollView>
      <LanguageModal
        onClose={() => setLanguageModalVisible(false)}
        visible={isLangaugeModalVisible}
      />
      <Overlay isUploading={isUploading} />
    </>
  );
}

const menuItem = (title: string, onPress?: () => void) => (
  <TouchableOpacity style={styles.menuRow} onPress={onPress}>
    <Text style={styles.menuText}>{title}</Text>
    <MaterialIcons name="chevron-right" size={20} color="#555C70" />
  </TouchableOpacity>
);

const styles = StyleSheet.create({
  edit_button: {
    position: "absolute",
    bottom: 0,
    right: 0,
    width: 40,
    height: 40,
  },
  container: {
    borderWidth: 1,
    flex: 1,
    backgroundColor: "#F3F5F8",
  },
  topBar: {
    flexDirection: "row",
    alignItems: "center",
    paddingHorizontal: 8,
    paddingVertical: 12,
    backgroundColor: "#F3F5F8",
  },
  backButton: {
    padding: 8,
  },
  headerText: {
    fontSize: 16,
    fontWeight: "600",
    marginLeft: 8,
    color: "#252A34",
  },
  scrollContent: {
    paddingHorizontal: 16,
    paddingBottom: 32,
  },
  avatarContainer: {
    alignItems: "center",
    marginVertical: 24,
  },
  avatar: {
    width: 120,
    height: 120,
    borderRadius: 60,
  },
  editAvatar: {
    position: "absolute",
    bottom: 0,
    right: "35%",
    width: 40,
    height: 40,
    backgroundColor: "#008866",
    borderRadius: 20,
    justifyContent: "center",
    alignItems: "center",
  },
  card: {
    backgroundColor: "#FCFCFC",
    borderRadius: 8,
    marginBottom: 16,
    paddingHorizontal: 16,
    paddingVertical: 8,
  },
  row: {
    flexDirection: "row",
    justifyContent: "space-between",
    alignItems: "center",
    paddingVertical: 12,
  },
  textGroup: {
    flexDirection: "column",
  },
  label: {
    fontSize: 14,
    color: "#252A34",
  },
  value: {
    fontSize: 14,
    fontWeight: "600",
    color: "#252A34",
    marginTop: 2,
  },
  divider: {
    height: 1,
    backgroundColor: "#E5E9F0",
    marginVertical: 4,
  },
  menuRow: {
    flexDirection: "row",
    justifyContent: "space-between",
    alignItems: "center",
    paddingVertical: 16,
  },
  menuText: {
    fontSize: 14,
    color: "#252A34",
  },
});