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 ScreenMassa = ({ 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 [weight, setWeight] = useState(0); //kg
  const [height, setHeight] = useState(0); //cm

  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 bmiFormula = (w, h) => {
    if (w > 0 && h > 0)
      return parseFloat((w / ((h / 100) * (h / 100))).toFixed(2));
    else return null;
  };
  const bmiDiagnose = (num, sex) => {
    if (num > 0) {
      if (sex == "Male") {
        if (num >= 27) return "Obese";
        else if (num >= 23) return "Over";
        else if (num >= 17) return "Normal";
        else if (num < 17) return "Under";
        else return null;
      } else if (sex == "Female") {
        if (num >= 27) return "Obese";
        else if (num >= 25) return "Over";
        else if (num >= 18) return "Normal";
        else if (num < 18) return "Under";
        else return null;
      } else return null;
    } else return null;
  };
  const bmiTextColor = (stat) => {
    if (stat == "Normal") return "green";
    else return "red";
  };

  const quickResult = () => {
    const diagnose = bmiDiagnose(bmiFormula(weight, height), profileSex);
    const title = `${diagnose}-Weight`;
    if (diagnose == "Obese") {
      const message =
        "Obesitas berbahaya bagi kesehatan. Penting untuk kamu mengurus berat badan tersebut dengan cara yang sehat dan cermatilah asupan makanan serta latihannya.";
      if (profileSex == "Male") {
        const image = require("../img/bmi/man/fat.png");
        return { title, message, image };
      } else {
        const image = require("../img/bmi/woman/fat.png");
        return { title, message, image };
      }
    } else if (diagnose == "Over") {
      const message =
        "Kamu kelebihan berat badan, tetapi jangan khawatir! Kemungkinan besar kamu masih dapat mengontrol berat badan melalui pola makan dan latihan fisik yang sehat.";
      if (profileSex == "Male") {
        const image = require("../img/bmi/man/fat.png");
        return { title, message, image };
      } else {
        const image = require("../img/bmi/woman/fat.png");
        return { title, message, image };
      }
    } else if (diagnose == "Normal") {
      const message =
        "Selamat! Kamu termasuk dalam kategori berat badan normal, tetapi jaga asupan makanan dan latihan fisik agar tetap sehat serta stabil ya!";
      if (profileSex == "Male") {
        const image = require("../img/bmi/man/fit.png");
        return { title, message, image };
      } else {
        const image = require("../img/bmi/woman/fit.png");
        return { title, message, image };
      }
    } else if (diagnose == "Under") {
      const message =
        "Kamu termasuk kategori kelembongan, perlu diperhatikan untuk meningkatkan berat badannya dengan cara yang sesuai dan sehat agar tetap aktif serta stabil.";
      if (profileSex == "Male") {
        const image = require("../img/bmi/man/fit.png");
        return { title, message, image };
      } else {
        const image = require("../img/bmi/woman/fit.png");
        return { title, message, image };
      }
    } else {
      const title = "Cek BMI";
      const message =
        "Cek berat badan ideal mu dengan memasukkan Berat dan Tinggi kamu";
      const image = require("../img/bmi/weighing-scale.png");
      return { title, message, image };
    }
  };

  const reqRecordList = async () => {
    try {
      const url = "https://uas.ditaajipratama.net/api/checkcare/bmi/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/bmi/add";
      const body = {
        weight: weight,
        height: height,
      };
      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}>
        W:{item.weight} H:{item.height} BMI:
        {bmiFormula(item.weight, item.height)}
      </Text>
      <Text
        style={[
          styles.resultStatus,
          {
            color: bmiTextColor(
              bmiDiagnose(bmiFormula(item.weight, item.height), profileSex)
            ),
          },
        ]}
      >
        {bmiDiagnose(bmiFormula(item.weight, item.height), profileSex)}
      </Text>
    </CardRecord>
  );

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

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

      <View style={styles.inputRow}>
        <TextInput
          style={styles.inputForm}
          placeholder="W (kg)"
          placeholderTextColor="#888"
          keyboardType="numeric"
          onChangeText={(text) => setWeight(text)}
          value={weight}
        />
        <TextInput
          style={styles.inputForm}
          placeholder="H (cm)"
          placeholderTextColor="#888"
          keyboardType="numeric"
          onChangeText={(text) => setHeight(text)}
          value={height}
        />
        <TouchableOpacity style={styles.inputButtonSubmit} onPress={reqAdd}>
          <Text style={styles.submitText}>Submit</Text>
        </TouchableOpacity>
      </View>

      <View style={{ flex: 2 }}>
        <FlatList
          data={recordList.data}
          renderItem={({ item }) => <ListItem item={item} />}
          keyExtractor={(item, index) => index.toString()}
        />
      </View>
    </Container>
  ); // End return
};

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 ScreenMassa;
