import axios from 'axios';
import FileUploadResponse from '@interfaces/responses/FileUploadResponse';
import FileStatusResponse from '@interfaces/responses/FileStatusResponse';


export default class ApiService {
    /** @type {string} */
    private readonly baseUrl: string = 'http://core.sandd';

    /** @type { [key:string] : string; } */
    private readonly apiRoutes = {
        file: this.baseUrl + '/api/file',
        fileDownload: this.baseUrl + '/api/file/convert',
        searchAndDisplace: this.baseUrl + '/search-and-displace'
    };

    constructor() {}

    /**
     * Upload a file to the server and return its response.
     * Throws an error if the response wasn't successful
     *
     * TODO: Annotate the return type correctly
     *
     * @param   {File}  file    The file we want to upload
     *
     * @returns {Promise<FileUploadResponse>}   The response from the server
     */
    public async uploadFile(file: File): Promise<FileUploadResponse>
    {
        let formData = new FormData();
        formData.append('file', file);

        try {
            let response = await axios.post<FileUploadResponse>(
                this.apiRoutes.file,
                formData,
                {
                    headers: {
                        'Content-Type': 'multipart/form-data'
                    }
                }
            )
            return response.data;
        } catch (err) {
            throw err;
        }
    }

    /**
     * Get data for a file from the server.
     * Throws an error if the response wasn't successful
     *
     * @param   {string}    fileId  The id of the file we want to query
     *
     * @returns {Promise<FileStatusResponse>}   The response from the server
     *
     * @throws
     */
    public async getFileData(fileId: string): Promise<FileStatusResponse>
    {
        try {
            let response = await axios.get<FileStatusResponse>(this.apiRoutes.searchAndDisplace + `/${fileId}`);

            return response.data;
        } catch (err) {
            throw err;
        }
    }

    /**
     * Perform a search and displace operation on a document
     *
     * @param   {string}    content     The content of the document
     * @param   {Array}     searchers   The list of searchers and their replace values
     */
    public async filterDocument(content: string, searchers: Array<{ key: string; replace_with: string; }>)
    {
        try {
            let response = await axios.post(
                this.apiRoutes.searchAndDisplace,
                {
                    'content': content,
                    'searchers': searchers
                }
            );

            return response.data;
        } catch (err) {
            throw err;
        }
    }


    public async convertFile(content:string)
    {
        try {
            let response = await axios.post(
                this.apiRoutes.fileDownload,
                {
                    'content': content
                }
            );

            return response.data;
        } catch (err) {
            throw err;
        }
    }
}