import { action, makeObservable, observable } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { Doc, Opt } from '../../fields/Doc';
import { ScriptField } from '../../fields/ScriptField';
import { ScriptCast } from '../../fields/Types';
import { emptyFunction } from '../../Utils';
import { DragManager } from '../util/DragManager';
import { CompileScript } from '../util/Scripting';
import { EditableView } from './EditableView';
import { DocumentIconContainer } from './nodes/DocumentIcon';
import { OverlayView } from './OverlayView';
import './ScriptBox.scss';

export interface ScriptBoxProps {
    onSave: (text: string, onError: (error: string) => void) => void;
    onCancel?: () => void;
    initialText?: string;
    showDocumentIcons?: boolean;
    setParams?: (p: string[]) => void;
}

@observer
export class ScriptBox extends React.Component<ScriptBoxProps> {
    @observable
    private _scriptText: string;

    constructor(props: ScriptBoxProps) {
        super(props);
        makeObservable(this);
        this._scriptText = props.initialText || '';
    }

    @action
    onChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
        this._scriptText = e.target.value;
    };

    @action
    onError = (error: string) => {
        console.log('ScriptBox: ' + error);
    };

    overlayDisposer?: () => void;
    onFocus = () => {
        this.overlayDisposer?.();
        this.overlayDisposer = OverlayView.Instance.addElement(<DocumentIconContainer />, { x: 0, y: 0 });
    };

    onBlur = () => {
        this.overlayDisposer?.();
    };

    render() {
        let onFocus: Opt<() => void> = undefined,
            onBlur: Opt<() => void> = undefined;
        if (this.props.showDocumentIcons) {
            onFocus = this.onFocus;
            onBlur = this.onBlur;
        }
        const params = <EditableView contents={''} display={'block'} maxHeight={72} height={35} fontSize={28} GetValue={() => ''} SetValue={(value: string) => (this.props.setParams?.(value.split(' ').filter(s => s !== ' ')) ? true : true)} />;
        return (
            <div className="scriptBox-outerDiv">
                <div style={{ display: 'flex', flexDirection: 'column', height: '100%' }}>
                    <textarea className="scriptBox-textarea" onChange={this.onChange} value={this._scriptText} onFocus={onFocus} onBlur={onBlur}></textarea>
                    <div style={{ background: 'beige' }}>{params}</div>
                </div>
                <div className="scriptBox-toolbar">
                    <button
                        onClick={e => {
                            this.props.onSave(this._scriptText, this.onError);
                            e.stopPropagation();
                        }}>
                        Save
                    </button>
                    <button
                        onClick={e => {
                            this.props.onCancel && this.props.onCancel();
                            e.stopPropagation();
                        }}>
                        Cancel
                    </button>
                </div>
            </div>
        );
    }
    //let l = docList(this.source[0].data).length; if (l) { let ind = this.target[0].index !== undefined ? (this.target[0].index+1) % l : 0;  this.target[0].index = ind;  this.target[0].proto = getProto(docList(this.source[0].data)[ind]);}
    public static EditButtonScript(title: string, doc: Doc, fieldKey: string, clientX: number, clientY: number, contextParams?: { [name: string]: string }, defaultScript?: ScriptField) {
        let overlayDisposer: () => void = emptyFunction;
        const script = ScriptCast(doc[fieldKey]) || defaultScript;
        let originalText: string | undefined = undefined;
        if (script) {
            originalText = script.script.originalScript;
        }
        // tslint:disable-next-line: no-unnecessary-callback-wrapper
        const params: string[] = [];
        const setParams = (p: string[]) => params.splice(0, params.length, ...p);
        const scriptingBox = (
            <ScriptBox
                initialText={originalText}
                setParams={setParams}
                onCancel={overlayDisposer}
                onSave={(text, onError) => {
                    if (!text) {
                        Doc.GetProto(doc)[fieldKey] = undefined;
                    } else {
                        const script = CompileScript(text, {
                            params: { this: Doc.name, ...contextParams },
                            typecheck: false,
                            editable: true,
                            transformer: DocumentIconContainer.getTransformer(),
                        });
                        if (!script.compiled) {
                            onError(script.errors.map(error => error.messageText).join('\n'));
                            return;
                        }

                        const div = document.createElement('div');
                        div.style.width = '90';
                        div.style.height = '20';
                        div.style.background = 'gray';
                        div.style.position = 'absolute';
                        div.style.display = 'inline-block';
                        div.style.transform = `translate(${clientX}px, ${clientY}px)`;
                        div.innerHTML = 'button';
                        params.length && DragManager.StartButtonDrag([div], text, doc.title + '-instance', {}, params, (button: Doc) => {}, clientX, clientY);

                        Doc.GetProto(doc)[fieldKey] = new ScriptField(script);
                        overlayDisposer();
                    }
                }}
                showDocumentIcons
            />
        );
        overlayDisposer = OverlayView.Instance.addWindow(scriptingBox, { x: 400, y: 200, width: 500, height: 400, title });
    }
}