export default new class {
    constructor() {
        this.apiPrefix = `/api`;
        this.apiPrefix = `https://medwise.webstaginghub.com//api`;
    }

    defaultHeaders() {
        return {
            'Content-Type': 'application/json',
        };
    }

    authTokenHeaders(headers = {}) {
        return {
            ...(headers || {}),
            Authorization: localStorage.getItem('authToken')
        };
    }

    async handleUnauthorize(result) {
        const json = await result.json();
        if (!json.success && json.message === 'Invalid token') {
            location.reload();
            await new Promise(resolve => setTimeout(resolve, 1000));
        }

        return json;
    }

    get(url, headers = false, options = {}) {
        if (!headers) headers = this.defaultHeaders();

        headers = this.authTokenHeaders(headers);
        const prefix = options.hasOwnProperty('prefix') ? options.prefix : this.apiPrefix;

        return fetch(`${prefix}/${url}`, { headers }).then(res => {
            if (res.status === 403) setTimeout(() => location.reload(), 500);
            return this.handleUnauthorize(res);
        });
    }

    delete(url, headers = false) {
        if (!headers) headers = this.defaultHeaders();
        headers = this.authTokenHeaders(headers);
        return fetch(`${this.apiPrefix}/${url}`, {
            method: 'DELETE', headers
        }).then(res => this.handleUnauthorize(res));
    }

    post(url, data = {}, headers = false) {
        if (!headers) headers = this.defaultHeaders();
        headers = this.authTokenHeaders(headers);
        return fetch(`${this.apiPrefix}/${url}`, {
            method: 'post', body: data, headers
        }).then(res => this.handleUnauthorize(res));
    }

    put(url, data = {}, headers = false) {
        if (!headers) headers = this.defaultHeaders();
        headers = this.authTokenHeaders(headers);
        return fetch(`${this.apiPrefix}/${url}`, {
            method: 'put', body: data, headers
        }).then(res => this.handleUnauthorize(res));
    }

    jsonToFormData(obj, form = new FormData(), namespace = '') {
        for (let key in obj) {
            if (obj.hasOwnProperty(key)) {
                let formKey = namespace ? `${namespace}[${key}]` : key;

                if (obj[key] instanceof File) {
                    form.append(formKey, obj[key]);
                } else if (obj[key] instanceof Array) {
                    obj[key].forEach((item, index) => {
                        this.jsonToFormData(item, form, `${formKey}[${index}]`);
                    });
                } else if (typeof obj[key] === 'object' && obj[key] !== null) {
                    this.jsonToFormData(obj[key], form, formKey);
                } else {
                    form.append(formKey, obj[key]);
                }
            }
        }
        return form;
    }
};