import React from "react";
import Path from "path";

import "./viewerpage.scss";
import "./error.scss";
import { Files } from "../model/";
import {
    BreadCrumb, Bundle, NgIf, Loader, EventReceiver, LoggedInOnly, ErrorPage,
} from "../components/";
import { opener, notify } from "../helpers/";
import { FileDownloader, ImageViewer, PDFViewer, FormViewer } from "./viewerpage/";

const VideoPlayer = (props) => (
    <Bundle
        loader={import(/* webpackChunkName: "video" */"./viewerpage/videoplayer")}
        symbol="VideoPlayer" overrides={["/overrides/video-transcoder.js"]}>
        {(Comp) => <Comp {...props}/>}
    </Bundle>
);
const IDE = (props) => (
    <Bundle
        loader={import(/* webpackChunkName: "ide" */"./viewerpage/ide")}
        symbol="IDE">
        {(Comp) => <Comp {...props}/>}
    </Bundle>
);
const AudioPlayer = (props) => (
    <Bundle
        loader={import(/* webpackChunkName: "audioplayer" */"./viewerpage/audioplayer")}
        symbol="AudioPlayer">
        {(Comp) => <Comp {...props}/>}
    </Bundle>
);
const Appframe = (props) => (
    <Bundle
        loader={import(/* webpackChunkName: "appframe" */"./viewerpage/appframe")}
        symbol="AppFrame">
        {(Comp) => <Comp {...props}/>}
    </Bundle>
);

export class ViewerPageComponent extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            path: props.match.url.replace("/view", "").replace(/%23/g, "#") + (location.hash || ""),
            url: null,
            filename: Path.basename(props.match.url.replace("/view", "")) || "untitled.dat",
            opener: null,
            content: null,
            needSaving: false,
            isSaving: false,
            loading: true,
            application_arguments: null,
        };
        this.props.subscribe("file.select", this.onPathUpdate.bind(this));
    }

    UNSAFE_componentWillReceiveProps(props) {
        this.setState({
            path: props.match.url.replace("/view", "").replace(/%23/g, "#") + (location.hash || ""),
            filename: Path.basename(props.match.url.replace("/view", "")) || "untitled.dat",
        }, () => this.componentDidMount());
    }

    componentDidMount() {
        const metadata = () => {
            return new Promise((done, err) => {
                const [app_opener, app_args] = opener(this.state.path);
                Files.url(this.state.path).then((url) => {
                    this.setState({
                        url: url,
                        opener: app_opener,
                        application_arguments: app_args,
                    }, () => done(app_opener));
                }).catch((error) => {
                    this.props.error(error);
                    err(error);
                });
            });
        };
        const data_fetch = (app) => {
            if (app === "editor" || app === "form") {
                return Promise.all([
                    Files.cat(this.state.path),
                    Files.options(this.state.path),
                ]).then((d) => {
                    const [content, options] = d;
                    this.setState({
                        content: content,
                        loading: false,
                        acl: options["allow"],
                    });
                }).catch((err) => {
                    if (err && err.code === "BINARY_FILE") {
                        this.setState({ opener: "download", loading: false });
                    } else {
                        this.props.error(err);
                    }
                });
            }
            this.setState({ loading: false });
        };
        return metadata().then(data_fetch);
    }

    componentWillUnmount() {
        this.props.unsubscribe("file.select");
    }

    save(file) {
        this.setState({ isSaving: true });
        return Files.save(this.state.path, file)
            .then(() => {
                this.setState({ isSaving: false, needSaving: false });
                return Promise.resolve();
            })
            .then(() => {
                return new Promise((done, err) => {
                    const reader = new FileReader();
                    reader.onload = () => {
                        this.setState({ content: reader.result });
                        done();
                    };
                    reader.onerror = (e) => {
                        err({ message: "Internal error 500" });
                    };
                    reader.readAsText(file);
                });
            })
            .catch((err) => {
                if (err && err.code === "CANCELLED") return;
                this.setState({ isSaving: false });
                notify.send(err, "error");
                return Promise.reject(err);
            });
    }

    onPathUpdate(path) {
        this.props.history.push("/files"+path);
    }

    needSaving(bool) {
        return new Promise((done) => {
            this.setState({ needSaving: bool }, done);
        });
    }

    render() {
        return (
            <div className="component_page_viewerpage">
                <BreadCrumb needSaving={this.state.needSaving} className="breadcrumb" path={this.state.path} />
                <div className="page_container">
                    <NgIf cond={this.state.loading === false}>
                        <NgIf cond={this.state.opener === "editor"}>
                            <IDE
                                needSavingUpdate={this.needSaving.bind(this)}
                                needSaving={this.state.needSaving}
                                isSaving={this.state.isSaving}
                                onSave={this.save.bind(this)}
                                content={this.state.content || ""}
                                url={this.state.url}
                                path={this.state.path}
                                acl={this.state.acl}
                                filename={this.state.filename} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "image"}>
                            <ImageViewer
                                data={this.state.url}
                                filename={this.state.filename}
                                path={this.state.path} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "pdf"}>
                            <PDFViewer
                                data={this.state.url}
                                filename={this.state.filename} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "video"}>
                            <VideoPlayer
                                data={this.state.url}
                                filename={this.state.filename}
                                path={this.state.path} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "form"}>
                            <FormViewer
                                needSavingUpdate={this.needSaving.bind(this)}
                                needSaving={this.state.needSaving}
                                isSaving={this.state.isSaving}
                                onSave={this.save.bind(this)}
                                content={this.state.content || ""}
                                data={this.state.url}
                                filename={this.state.filename} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "audio"}>
                            <AudioPlayer data={this.state.url} filename={this.state.filename} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "download"}>
                            <FileDownloader data={this.state.url} filename={this.state.filename} />
                        </NgIf>
                        <NgIf cond={this.state.opener === "appframe"}>
                            <Appframe data={this.state.path} filename={this.state.filename} args={this.state.application_arguments} />
                        </NgIf>
                    </NgIf>
                    <NgIf cond={this.state.loading === true}>
                        <Loader/>
                    </NgIf>
                </div>
            </div>
        );
    }
}

export const ViewerPage = ErrorPage(LoggedInOnly(EventReceiver(ViewerPageComponent)));