import BasicTemplate from "../templates/BasicTemplate";
import { Container, Form, Row, Col, Card, Alert, Button, Image } from "react-bootstrap";
import React, { useState, useEffect } from "react";
import validator from "validator";
import axios from "axios";
import DataStorage from "../organisms/DataStorage";

export default function UserInfoPage() {

    // fetch data:

    const [error, setErrors] = useState("");
    const [initialData, setInitialData] = useState(null);
    const [formData, setFormData] = useState({
        avatar: "/default_avatar.jpg",
        full_name: "",
        phone_number: "",
        address: "",
        email: "",
        password: "",
        confirmPassword: "",
    });

    useEffect(() => {
        axios
            .get(process.env.REACT_APP_API_URL + '/authentication/profile', {
                headers: {
                    Authorization: `Bearer ${DataStorage.get('accessToken')}`,
                },
            })
            .then((response) => {
                if (response.status === 401) {
                    // phiên hết hạn
                    setErrors(JSON.stringify(response));
                } else {
                    const { avatar, full_name, address, phone_number, email } = response.data;
                    const fetchedData = {
                        avatar: avatar || "/default_avatar.jpg",
                        full_name: full_name || "",
                        phone_number: phone_number || "",
                        address: address || "",
                        email: email || "",
                        password: "",
                        confirmPassword: "",
                    };

                    if (fetchedData.full_name !== DataStorage.get('username')) DataStorage.set('username', fetchedData.full_name)
                    setInitialData(fetchedData);
                    setFormData(fetchedData);
                }
            })
            .catch((error) => {
                setErrors(JSON.stringify(error));
            });
    }, []);

    // console.log('formdata', formData);
    // console.log('initialdata', initialData);
    // State để hiển thị lỗi khi validation

    const [isChanged, setChanged] = useState(false);

    const handleChange = (e) => {
        const { name, value } = e.target;
        setFormData({ ...formData, [name]: value });
    };

    // Hàm xử lý thay đổi avatar
    const handleAvatarChange = (e) => {
        const file = e.target.files[0];
        if (file) {
          const reader = new FileReader();
          reader.onloadend = () => {
            setFormData((prevData) => ({
              ...prevData,
              avatar: reader.result // Cập nhật ảnh đại diện
            }));
          };
          reader.readAsDataURL(file);
          setChanged(true);
        }
      };

    useEffect(() => {
        const hasChanges = () => {
            if (initialData) {
                for (let key in formData) {
                    if (formData[key] !== initialData[key]) {
                        return true;
                    }
                }
                return false;
            } else {
                return false;
            }
        };
        setChanged(hasChanges());
    }, [formData, initialData]);

    const handleSubmit = async (e) => {
        e.preventDefault();
        setChanged(false); // prevent another click
        if (formData.phone_number.trim() !== "" && !validator.isMobilePhone(formData.phone_number, 'vi-VN')) setErrors("Số điện thoại không hợp lệ");
        else if (formData.email.trim() !== "" && !validator.isEmail(formData.email)) setErrors("Email không hợp lệ");
        else if (formData.password !== "" && formData.confirmPassword !== formData.password) setErrors("Mật khẩu không khớp");
        else {

            // let avatarBase64 = null;

            // if (formData.avatar) {
            //     // Chuyển ảnh đại diện thành chuỗi Base64
            //     avatarBase64 = await new Promise((resolve, reject) => {
            //         const reader = new FileReader();
            //         reader.onloadend = () => resolve(reader.result.split(",")[1]); // Chỉ lấy phần Base64
            //         reader.onerror = (error) => reject(error);
            //         reader.readAsDataURL(formData.avatar);
            //     });
            // }

            let data = {};

            // if (avatarBase64) data.avatar = avatarBase64;
            if (formData.full_name.trim() !== "" && formData.full_name.trim() !== initialData.full_name) data.full_name = formData.full_name.trim();
            if (formData.phone_number.trim() !== "" && formData.phone_number.trim() !== initialData.phone_number) data.phone_number = formData.phone_number.trim();
            if (formData.address.trim() !== "" && formData.address.trim() !== initialData.address) data.address = formData.address.trim();
            if (formData.email.trim() !== "" && formData.email.trim() !== initialData.email) data.email = formData.email.trim();
            if (formData.password.trim() !== "") data.hash_password = formData.password;

            // gửi request ở đây
            axios.post(process.env.REACT_APP_API_URL + '/users/updateUser', data, {
                headers: {
                    Authorization: `Bearer ${DataStorage.get('accessToken')}`,
                }
            }).then((response) => {
                if (response.status === 200 || response.status === 201) {
                    window.location.reload(); // cập nhật lại thông tin
                } else {
                    setErrors(JSON.stringify(response));
                }
            }).catch((error) => setErrors(JSON.stringify(error)));
        }
    };

    return <BasicTemplate content={
        (
            <Container fluid className="d-flex align-items-center justify-content-center mt-5">
                <Row>
                    <Col xs={1} md={2}></Col>
                    <Col xs={10} md={8}>
                        <Card style={{ width: '30rem' }} className='justify-content-center'>
                            <Card.Header>
                                <Card.Title className='mt-1 text-center'>Thông tin khách hàng</Card.Title>
                            </Card.Header>
                            <Card.Body>

                                <Form onSubmit={handleSubmit}>
                                    {error && <Alert variant="danger">{error}</Alert>}
                                    <Row className="mb-3">
                                        <Col xs={12} md={6} className="text-center">
                                            {/*Image*/}
                                            <Image
                                                src={formData.avatar} // Hiển thị ảnh đại diện từ formData
                                                alt="User Avatar"
                                                roundedCircle
                                                width={120}
                                                height={120}
                                            />
                                            <Form.Group controlId="formAvatar">
                                                <Form.Label>Ảnh đại diện</Form.Label>
                                                <Form.Control type="file" accept="image/*" onChange={handleAvatarChange} />
                                            </Form.Group>
                                        </Col>
                                        <Col xs={12} md={6}>
                                            <Form.Group controlId="formUsername">
                                                <Form.Label>Họ tên người dùng</Form.Label>
                                                <Form.Control
                                                    type="text"
                                                    name="full_name"
                                                    placeholder="Họ tên người dùng"
                                                    value={formData.full_name}
                                                    onChange={handleChange}
                                                />
                                            </Form.Group>
                                        </Col>
                                    </Row>

                                    <Form.Group controlId="formPhone" className="mb-3">
                                        <Form.Label>Số điện thoại</Form.Label>
                                        <Form.Control
                                            type="text"
                                            name="phone_number"
                                            placeholder="Số điện thoại"
                                            value={formData.phone_number}
                                            onChange={handleChange}
                                        />
                                    </Form.Group>

                                    <Form.Group controlId="formAddress" className="mb-3">
                                        <Form.Label>Địa chỉ giao hàng mặc định</Form.Label>
                                        <Form.Control
                                            type="text"
                                            name="address"
                                            placeholder="Địa chỉ giao hàng"
                                            value={formData.address}
                                            onChange={handleChange}
                                        />
                                    </Form.Group>

                                    <Form.Group controlId="formEmail" className="mb-3">
                                        <Form.Label>Email</Form.Label>
                                        <Form.Control
                                            type="text"
                                            name="email"
                                            placeholder="Email"
                                            value={formData.email}
                                            onChange={handleChange}
                                        />
                                    </Form.Group>

                                    <Form.Group controlId="formPassword" className="mb-3">
                                        <Form.Label>Password</Form.Label>
                                        <Form.Control
                                            type="password"
                                            name="password"
                                            placeholder="********"
                                            value={formData.password}
                                            onChange={handleChange}
                                        />
                                    </Form.Group>

                                    <Form.Group controlId="formConfirmPassword" className="mb-3">
                                        <Form.Label>Nhập lại Password</Form.Label>
                                        <Form.Control
                                            type="password"
                                            name="confirmPassword"
                                            placeholder="********"
                                            value={formData.confirmPassword}
                                            onChange={handleChange}
                                        />
                                    </Form.Group>

                                    <Button variant="primary" type="submit" disabled={!isChanged}>
                                        Cập nhật
                                    </Button>
                                </Form>
                            </Card.Body>
                        </Card>

                    </Col>
                    <Col xs={1} md={2}></Col>
                </Row>


            </Container>
        )
    } />
}