import React from "react" ;
import ReactDOMServer from "react-dom/server" ;
import Select from "react-select" ;
import CreatableSelect from "react-select/creatable" ;
import { gAppRef } from "./index.js" ;
import { ImageFileUploader } from "./FileUploader.js" ;
import { makeScenarioDisplayName, parseScenarioDisplayName, unloadCreatableSelect } from "./utils.js" ;

// --------------------------------------------------------------------

export class ArticleSearchResult2
{

    static _doEditArticle( vals, notify ) {

        let refs = {} ;

        // initialize the image
        let imageFilename=null, imageData=null ;
        let imageRef=null, uploadImageRef=null, removeImageRef=null ;
        let imageUrl = gAppRef.makeFlaskUrl( "/images/article/" + vals.article_id ) ;
        imageUrl += "?foo=" + Math.random() ; // FUDGE! To bypass the cache :-/
        let onMissingImage = (evt) => {
            imageRef.src = "/images/placeholder.png" ;
            removeImageRef.style.display = "none" ;
        } ;
        let onUploadImage = (evt) => {
            if ( evt === null && !gAppRef.isFakeUploads() ) {
                // nb: the article image was clicked - trigger an upload request
                uploadImageRef.click() ;
                return ;
            }
            let fileUploader = new ImageFileUploader() ;
            fileUploader.getFile( evt, imageRef, removeImageRef, (fname,data) => {
                imageFilename = fname ;
                imageData = data ;
            } ) ;
        } ;
        let onRemoveImage = () => {
            imageData = "{remove}" ;
            imageRef.src = "/images/placeholder.png" ;
            removeImageRef.style.display = "none" ;
        } ;

        // initialize the publications
        let publications = [ { value: null, label: <i>(none)</i> } ] ;
        let currPub = 0 ;
        for ( let p of Object.entries(gAppRef.caches.publications) ) {
            publications.push( {
                value: p[1].pub_id,
                label: <span dangerouslySetInnerHTML={{__html: p[1].pub_name}} />
            } ) ;
            if ( p[1].pub_id === vals.pub_id )
                currPub = publications.length - 1 ;
        }
        publications.sort( (lhs,rhs) => {
            return ReactDOMServer.renderToStaticMarkup( lhs.label ).localeCompare( ReactDOMServer.renderToStaticMarkup( rhs.label ) ) ;
        } ) ;

        // initialize the authors
        let allAuthors = [] ;
        for ( let a of Object.entries(gAppRef.caches.authors) )
            allAuthors.push( { value: a[1].author_id, label: a[1].author_name }  );
        allAuthors.sort( (lhs,rhs) => { return lhs.label.localeCompare( rhs.label ) ; } ) ;
        let currAuthors = [] ;
        if ( vals.article_authors ) {
            currAuthors = vals.article_authors.map( a => {
                return { value: a, label: gAppRef.caches.authors[a].author_name }
            } ) ;
        }

        // initialize the scenarios
        let allScenarios = [] ;
        for ( let s of Object.entries(gAppRef.caches.scenarios) )
            allScenarios.push( { value: s[1].scenario_id, label: makeScenarioDisplayName(s[1]) } ) ;
        allScenarios.sort( (lhs,rhs) => { return lhs.label.localeCompare( rhs.label ) ; } ) ;
        let currScenarios = [] ;
        if ( vals.article_scenarios ) {
            currScenarios = vals.article_scenarios.map( s => {
                return { value: s, label: makeScenarioDisplayName(gAppRef.caches.scenarios[s]) }
            } ) ;
        }

        // initialize the tags
        const tags = gAppRef.makeTagLists( vals.article_tags ) ;

        // prepare the form content
        /* eslint-disable jsx-a11y/img-redundant-alt */
        const content = <div>
            <div className="row image">
                <img src={imageUrl} className="image" onError={onMissingImage} onClick={() => onUploadImage(null)} ref={r => imageRef=r} alt="Click to upload an image for this article." />
                <img src="/images/delete.png" className="remove-image" onClick={onRemoveImage} ref={r => removeImageRef=r} alt="Remove the article's image." />
                <input type="file" accept="image/*" onChange={onUploadImage} style={{display:"none"}} ref={r => uploadImageRef=r} />
            </div>
            <div className="row title"> <label> Title: </label>
                <input type="text" defaultValue={vals.article_title} ref={(r) => refs.article_title=r} />
            </div>
            <div className="row subtitle"> <label> Subtitle: </label>
                <input type="text" defaultValue={vals.article_subtitle} ref={(r) => refs.article_subtitle=r} />
            </div>
            <div className="row authors"> <label> Authors: </label>
                <CreatableSelect className="react-select" classNamePrefix="react-select" options={allAuthors} isMulti
                    defaultValue = {currAuthors}
                    ref = { (r) => refs.article_authors=r }
                />
            </div>
            <div className="row publication"> <label> Publication: </label>
                <Select className="react-select" classNamePrefix="react-select" options={publications} isSearchable={true}
                    defaultValue = { publications[ currPub ] }
                    ref = { (r) => refs.pub_id=r }
                />
            </div>
            <div className="row tags"> <label> Tags: </label>
                <CreatableSelect className="react-select" classNamePrefix="react-select" options={tags[1]} isMulti
                    defaultValue = {tags[0]}
                    ref = { (r) => refs.article_tags=r }
                />
            </div>
            <div className="row scenarios"> <label> Scenarios: </label>
                <CreatableSelect className="react-select" classNamePrefix="react-select" options={allScenarios} isMulti
                    defaultValue = {currScenarios}
                    ref = { (r) => refs.article_scenarios=r }
                />
            </div>
            <div className="row snippet"> <label> Snippet: </label>
                <textarea defaultValue={vals.article_snippet} ref={(r) => refs.article_snippet=r} />
            </div>
            <div className="row url"> <label> Web: </label>
                <input type="text" defaultValue={vals.article_url} ref={(r) => refs.article_url=r} />
            </div>
        </div> ;

        // prepare the form buttons
        const buttons = {
            OK: () => {
                // unload the new values
                let newVals = {} ;
                for ( let r in refs ) {
                    if ( r === "pub_id" )
                        newVals[ r ] = refs[r].state.value && refs[r].state.value.value ;
                    else if ( r === "article_authors" ) {
                        let vals = unloadCreatableSelect( refs[r] ) ;
                        newVals.article_authors = [] ;
                        vals.forEach( v => {
                            if ( v.__isNew__ )
                                newVals.article_authors.push( v.label ) ; // nb: string = new author name
                            else
                                newVals.article_authors.push( v.value ) ; // nb: integer = existing author ID
                        } ) ;
                    } else if ( r === "article_scenarios" ) {
                        let vals =  unloadCreatableSelect( refs[r] ) ;
                        newVals.article_scenarios = [] ;
                        vals.forEach( v => {
                            if ( v.__isNew__ )
                                newVals.article_scenarios.push( parseScenarioDisplayName( v.label ) ) ; // nb: array = new scenario
                            else
                                newVals.article_scenarios.push( v.value ) ; // nb: integer = existing scenario ID
                        } ) ;
                    } else if ( r === "article_tags" ) {
                        let vals =  unloadCreatableSelect( refs[r] ) ;
                        newVals[ r ] =  vals.map( v => v.label ) ;
                    } else
                        newVals[ r ] = refs[r].value.trim() ;
                }
                if ( imageData ) {
                    newVals.imageData = imageData ;
                    newVals.imageFilename = imageFilename ;
                }
                if ( newVals.article_title === "" ) {
                    gAppRef.showErrorMsg( <div> Please specify the article's title. </div>) ;
                    return ;
                }
                // notify the caller about the new details
                notify( newVals, refs ) ;
            },
            Cancel: () => { gAppRef.closeModalForm() ; },
        } ;

        // show the form
        const isNew = Object.keys( vals ).length === 0 ;
        gAppRef.showModalForm( isNew?"New article":"Edit article", content, buttons ) ;
    }

}