import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { action, observable } from 'mobx';
import { observer } from 'mobx-react';
import * as rp from 'request-promise';
import { DocServer } from '../client/DocServer';
import { Docs } from '../client/documents/Documents';
import { Networking } from '../client/Network';
import { MainViewModal } from '../client/views/MainViewModal';
import { Doc, Opt } from '../fields/Doc';
import { List } from '../fields/List';
import { listSpec } from '../fields/Schema';
import { Cast } from '../fields/Types';
import { Utils } from '../Utils';
import './ImageUpload.scss';
import { MobileInterface } from './MobileInterface';
import * as React from 'react';
const { default: { DFLT_IMAGE_NATIVE_DIM } } = require('../client/views/global/globalCssVariables.module.scss'); // prettier-ignore
export interface ImageUploadProps {
    Document: Doc; // Target document for upload (upload location)
}

const inputRef = React.createRef<HTMLInputElement>();
const defaultNativeImageDim = Number(DFLT_IMAGE_NATIVE_DIM.replace('px', ''));

@observer
export class Uploader extends React.Component<ImageUploadProps> {
    @observable error: string = '';
    @observable nm: string = 'Choose files'; // Text of 'Choose Files' button
    @observable process: string = ''; // Current status of upload

    onClick = async () => {
        try {
            const col = this.props.Document;
            await Docs.Prototypes.initialize();
            const imgPrev = document.getElementById('img_preview');
            this.setOpacity(1, '1'); // Slab 1
            if (imgPrev) {
                const files: FileList | null = inputRef.current!.files;
                this.setOpacity(2, '1'); // Slab 2
                if (files && files.length !== 0) {
                    this.process = 'Uploading Files';
                    for (let index = 0; index < files.length; ++index) {
                        const file = files[index];
                        const res = await Networking.UploadFilesToServer({ file });
                        this.setOpacity(3, '1'); // Slab 3
                        // For each item that the user has selected
                        res.map(async ({ result }) => {
                            const name = file.name;
                            if (result instanceof Error) {
                                return;
                            }
                            const path = result.accessPaths.agnostic.client;
                            let doc = null;
                            // Case 1: File is a video
                            if (file.type === 'video/mp4') {
                                doc = Docs.Create.VideoDocument(path, { _nativeWidth: defaultNativeImageDim, _width: 400, title: name });
                                // Case 2: File is a PDF document
                            } else if (file.type === 'application/pdf') {
                                doc = Docs.Create.PdfDocument(path, { _nativeWidth: defaultNativeImageDim, _width: 400, title: name });
                                // Case 3: File is another document type (most likely Image)
                            } else {
                                doc = Docs.Create.ImageDocument(path, { _nativeWidth: defaultNativeImageDim, _width: 400, title: name });
                            }
                            this.setOpacity(4, '1'); // Slab 4
                            const res = await rp.get(Utils.prepend('/getUserDocumentIds'));
                            if (!res) {
                                throw new Error('No user id returned');
                            }
                            const field = await DocServer.GetRefField(JSON.parse(res).userDocumentId);
                            let pending: Opt<Doc>;
                            if (field instanceof Doc) {
                                pending = col;
                            }
                            if (pending) {
                                const data = await Cast(pending.data, listSpec(Doc));
                                if (data) data.push(doc);
                                else pending.data = new List([doc]);
                                this.setOpacity(5, '1'); // Slab 5
                                this.process = 'File ' + (index + 1).toString() + ' Uploaded';
                                this.setOpacity(6, '1'); // Slab 6
                            }
                            if (index + 1 === files.length) {
                                this.process = 'Uploads Completed';
                                this.setOpacity(7, '1'); // Slab 7
                            }
                        });
                    }
                    // Case in which the user pressed upload and no files were selected
                } else {
                    this.process = 'No file selected';
                }
                // Three seconds after upload the menu will reset
                setTimeout(this.clearUpload, 3000);
            }
        } catch (error) {
            this.error = JSON.stringify(error);
        }
    };

    // Updates label after a files is selected (so user knows a file is uploaded)
    inputLabel = async () => {
        const files: FileList | null = inputRef.current!.files;
        await files;
        if (files && files.length === 1) {
            this.nm = files[0].name;
        } else if (files && files.length > 1) {
            this.nm = files.length.toString() + ' files selected';
        }
    };

    // Loops through load icons, and resets buttons
    @action
    clearUpload = () => {
        for (let i = 1; i < 8; i++) {
            this.setOpacity(i, '0.2');
        }
        this.nm = 'Choose files';

        if (inputRef.current) {
            inputRef.current.value = '';
        }
        this.process = '';
    };

    // Clears the upload and closes the upload menu
    closeUpload = () => {
        this.clearUpload();
        MobileInterface.Instance.toggleUpload();
    };

    // Handles the setting of the loading bar
    setOpacity = (index: number, opacity: string) => {
        const slab = document.getElementById('slab' + index);
        if (slab) slab.style.opacity = opacity;
    };

    // Returns the upload interface for mobile
    private get uploadInterface() {
        return (
            <div className="imgupload_cont">
                <div className="closeUpload" onClick={() => this.closeUpload()}>
                    <FontAwesomeIcon icon="window-close" size={'lg'} />
                </div>
                <FontAwesomeIcon icon="upload" size="lg" style={{ fontSize: '130' }} />
                <input type="file" accept="application/pdf, video/*,image/*" className={`inputFile ${this.nm !== 'Choose files' ? 'active' : ''}`} id="input_image_file" ref={inputRef} onChange={this.inputLabel} multiple></input>
                <label className="file" id="label" htmlFor="input_image_file">
                    {this.nm}
                </label>
                <div className="upload_label" onClick={this.onClick}>
                    Upload
                </div>
                <img id="img_preview" src=""></img>
                <div className="loadingImage">
                    <div className="loadingSlab" id="slab1" />
                    <div className="loadingSlab" id="slab2" />
                    <div className="loadingSlab" id="slab3" />
                    <div className="loadingSlab" id="slab4" />
                    <div className="loadingSlab" id="slab5" />
                    <div className="loadingSlab" id="slab6" />
                    <div className="loadingSlab" id="slab7" />
                </div>
                <p className="status">{this.process}</p>
            </div>
        );
    }

    @observable private dialogueBoxOpacity = 1;
    @observable private overlayOpacity = 0.4;

    render() {
        return <MainViewModal contents={this.uploadInterface} isDisplayed={true} interactive={true} dialogueBoxDisplayedOpacity={this.dialogueBoxOpacity} overlayDisplayedOpacity={this.overlayOpacity} closeOnExternalClick={this.closeUpload} />;
    }
}