import React, { useState, useRef, useEffect } from "react";
import {
  View,
  Text,
  Image,
  StyleSheet,
  TouchableOpacity,
  Animated,
  BackHandler,
  FlatList,
  ScrollView,
  TextInput,
} from "react-native";
import axios from "axios";
import AsyncStorage from "@react-native-async-storage/async-storage";
import Container from "../components/Container";
import CardRecord from "../components/CardRecord";

const ScreenSuhu = ({ navigation }) => {
  const [token, setToken] = useState(null);

  const [profileId, setProfileId] = useState(null);
  const [profileName, setProfileName] = useState(null);
  const [profileSex, setProfileSex] = useState(null);
  const [profileDob, setProfileDob] = useState(null);
  const [profileAge, setProfileAge] = useState(null);

  const [temp, setTemp] = useState(0); //kg
  const [unit, setUnit] = useState("C"); // Celsius / Fahrenheit

  const [recordList, setRecordList] = useState([]);

  const getToken = async () => {
    const savedToken = await AsyncStorage.getItem("auth_token");
    if (savedToken !== null) {
      setToken(savedToken);
    } else {
      //   navigation.navigate("Profile");
    }
  };

  const HttpRequest = (url, body, conf, handle) => {
    // string, object, object
    axios
      .post(url, body, conf)
      .then((response) => {
        handle(response.data);
      })
      .catch((error) => {
        console.error("Terjadi kesalahan:", error.stack);
      });
  };

  const handleProfileDetail = (data) => {
    if (data.status === "success") {
      setProfileId(data.data.id);
      setProfileName(data.data.name);
      setProfileSex(data.data.sex);
      setProfileDob(data.data.dob);
      if (data.data.dob !== null) {
        const tanggalLahir = new Date(data.data.dob);
        const today = new Date();
        const umur = today.getFullYear() - tanggalLahir.getFullYear();
        const bulanSekarang = today.getMonth() - tanggalLahir.getMonth();
        let umurTerupdate;
        if (
          bulanSekarang < 0 ||
          (bulanSekarang === 0 && today.getDate() < tanggalLahir.getDate())
        ) {
          umurTerupdate = umur - 1;
        } else {
          umurTerupdate = umur;
        }
        setProfileAge(umurTerupdate);
      }
    }
  };

  const fetchProfileDetail = async () => {
    try {
      const url = "https://uas.ditaajipratama.net/api/checkcare/profile/detail";
      const body = {};
      const auth_token = await AsyncStorage.getItem("auth_token");
      const config = {
        headers: {
          Authorization: `Bearer ${auth_token}`,
        },
      };
      console.log(`Bearer ${auth_token}`);
      console.log(token);
      if (auth_token !== null) {
        HttpRequest(url, body, config, handleProfileDetail);
      }
    } catch (error) {
      console.log(error.stack);
    }
  };

  const quickResult = (unit, temp) => {
    var title = "Cek Suhu";
    var message = "Masukkan suhu tubuh Anda";
    var image = require("../img/thermometer.png");
    if (unit === "C") {
      if (temp < 35) {
        title = "Hypothermia";
        message = "Suhu tubuh Anda terlalu rendah";
      } else if (temp >= 35 && temp <= 37.2) {
        title = "Normal temperature";
        message = "Suhu tubuh Anda normal";
      } else if (temp > 37.2) {
        title = "Fever";
        message = "Suhu tubuh Anda tinggi";
      }
    } else if (unit === "F") {
      if (temp < 95) {
        title = "Hypothermia";
        message = "Suhu tubuh Anda terlalu rendah";
      } else if (temp >= 95 && temp <= 99) {
        title = "Normal temperature";
        message = "Suhu tubuh Anda normal";
      } else if (temp > 99) {
        title = "Fever";
        message = "Suhu tubuh Anda tinggi";
      }
    } else {
      title = "Cek Suhu";
      message = "Invalid unit. Use 'celsius' or 'fahrenheit'";
      image = require("../img/thermometer.png");
    }
    return { title, message, image };
  };

  const reqRecordList = async () => {
    try {
      const url = "https://uas.ditaajipratama.net/api/checkcare/temp/list";
      const body = {};
      const auth_token = await AsyncStorage.getItem("auth_token");
      const config = {
        headers: {
          Authorization: `Bearer ${auth_token}`,
        },
      };
      const handle = (data) => {
        setRecordList(data);
      };
      if (auth_token !== null) {
        HttpRequest(url, body, config, handle);
      }
    } catch (error) {
      console.log(error.stack);
    }
  };

  const reqAdd = async () => {
    try {
      const url = "https://uas.ditaajipratama.net/api/checkcare/temp/add";
      const body = {
        temperature: temp,
        unit,
      };
      const auth_token = await AsyncStorage.getItem("auth_token");
      const config = {
        headers: {
          Authorization: `Bearer ${auth_token}`,
        },
      };
      const handle = (data) => {
        reqRecordList();
        setWeight(0);
        setHeight(0);
      };
      if (auth_token !== null) {
        HttpRequest(url, body, config, handle);
      }
    } catch (error) {
      console.log(error.stack);
    }
  };

  const ListItem = ({ item }) => (
    <CardRecord key="{item.id}">
      <Text style={styles.resultDate}>{item.when}</Text>
      <Text style={styles.resultValue}>
        Temp: {item.temperature} °{item.unit}
      </Text>
      <Text style={[styles.resultStatus]}>
        {quickResult(item.unit, item.temperature).title}
      </Text>
    </CardRecord>
  );

  useEffect(() => {
    getToken();
    fetchProfileDetail();
    reqRecordList();
  }, []);

  return (
    <Container>
      <View style={styles.headerRow}>
        <View style={styles.illustrationContainer}>
          <Image
            source={quickResult(unit, temp).image}
            style={styles.illustration}
            resizeMode="contain"
          />
        </View>
        <View style={styles.textContainer}>
          <Text style={styles.title}>{quickResult(unit, temp).title}</Text>
          <Text style={styles.datetime}>{`Suhu: ${temp}° ${unit}`}</Text>
          <Text style={styles.description}>
            {quickResult(unit, temp).message}
          </Text>
        </View>
      </View>

      <View style={styles.inputRow}>
        <TextInput
          style={styles.inputForm}
          placeholder={`Temp (°${unit})`}
          placeholderTextColor="#888"
          keyboardType="numeric"
          onChangeText={(text) => setTemp(text)}
          value={temp}
        />
        <TextInput
          style={styles.inputForm}
          placeholder="Unit (C/F)"
          placeholderTextColor="#888"
          keyboardType="string"
          onChangeText={(text) => setUnit(text)}
          value={unit}
        />

        <TouchableOpacity style={styles.inputButtonSubmit} onPress={reqAdd}>
          <Text style={styles.submitText}>Submit</Text>
        </TouchableOpacity>
      </View>

      <View style={{ flex: 2 }}>
        <FlatList
          data={[{ temperature: temp, unit: unit }]}
          renderItem={({ item }) => <ListItem item={item} />}
          keyExtractor={(item, index) => index.toString()}
        />
      </View>
    </Container>
  );
};

const styles = StyleSheet.create({
  headerRow: {
    flexDirection: "row",
    alignItems: "center",
  },
  illustration: {
    width: 100,
    height: 100,
  },
  illustrationContainer: {
    marginRight: 16,
  },
  textContainer: {
    flex: 1,
  },
  title: {
    fontSize: 28,
    fontWeight: "bold",
    color: "#111",
  },
  datetime: {
    fontSize: 12,
    color: "#444",
    marginVertical: 4,
  },
  description: {
    fontSize: 14,
    color: "#333",
    maxWidth: 320,
    marginBottom: 16,
  },
  inputRow: {
    flexDirection: "row",
    justifyContent: "space-between",
    width: "100%",
    marginBottom: 10,
  },
  inputForm: {
    flex: 1,
    borderWidth: 1,
    borderColor: "#ccc",
    borderRadius: 30,
    paddingVertical: 10,
    paddingHorizontal: 16,
    marginHorizontal: 6,
    backgroundColor: "#fff",
    color: "#333",
  },
  inputButton: {
    flex: 1,
    borderWidth: 1,
    borderColor: "#ccc",
    borderRadius: 30,
    paddingVertical: 12,
    marginHorizontal: 6,
    backgroundColor: "#f9f9f9",
  },
  inputButtonSubmit: {
    flex: 1,
    borderRadius: 30,
    paddingVertical: 12,
    marginHorizontal: 6,
    backgroundColor: "#007bff",
  },
  inputText: {
    textAlign: "center",
    color: "#333",
    fontWeight: "500",
  },
  submitText: {
    textAlign: "center",
    color: "#fff",
    fontWeight: "600",
  },
  resultDate: {
    flex: 1,
    color: "#333",
  },
  resultValue: {
    flex: 1,
    textAlign: "center",
    color: "#111",
    fontWeight: "500",
  },
  resultStatus: {
    flex: 1,
    textAlign: "right",
    fontWeight: "bold",
  },
});

export default ScreenSuhu;
