import { makeObservable, observable, action } from 'mobx';
import { observer } from 'mobx-react';
import * as React from 'react';
import { ViewBoxAnnotatableComponent, ViewBoxInterface } from '../DocComponent';
import { StyleProp } from '../StyleProvider';
import './DiagramBox.scss';
import { FieldView, FieldViewProps } from './FieldView';
import { PinProps, PresBox } from './trails';
import mermaid from 'mermaid';
import { Doc, DocListCast } from '../../../fields/Doc';
import { List } from '../../../fields/List';
import { RichTextField } from '../../../fields/RichTextField';
import { ContextMenu } from '../ContextMenu';
import { gptAPICall, GPTCallType } from '../../apis/gpt/GPT';
import { ChatCompletionMessageParam } from 'openai/resources/chat/completions';
import OpenAI, { ClientOptions } from 'openai';

@observer
export class DiagramBox extends ViewBoxAnnotatableComponent<FieldViewProps>() implements ViewBoxInterface {
    public static LayoutString(fieldKey: string) {
        return FieldView.LayoutString(DiagramBox, fieldKey);
    }
    private _ref: React.RefObject<HTMLDivElement> = React.createRef();
    private _dragRef = React.createRef<HTMLDivElement>();
    constructor(props: FieldViewProps) {
        super(props);
        makeObservable(this);
        //this.chartContent = 'flowchart LR;A-->B:::wide;B-->C:::wide; B-->D[hello];';
    }

    @observable inputValue = '';
    @observable loading = false;
    @observable errorMessage = '';
    @observable mermaidCode = '';

    @action handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
        this.inputValue = e.target.value;
    };
    componentDidMount() {
        this._props.setContentViewBox?.(this);
        mermaid.initialize({
            securityLevel: 'loose',
            startOnLoad: true,
            flowchart: { useMaxWidth: true, htmlLabels: true, curve: 'cardinal' },
        });
    }
    renderMermaid = async (str:string) => {
        try {
            const { svg, bindFunctions } = await this.mermaidDiagram(str);
            return { svg, bindFunctions };
        } catch (error) {
            console.error('Error rendering mermaid diagram:', error);
            return { svg: '', bindFunctions: undefined };
        }
    };
    mermaidDiagram = async (str:string) => {
        return await mermaid.render('graph' + Date.now(), str);
    };

    async renderMermaidAsync(mermaidCode:string) {
        try {
            const { svg, bindFunctions } = await this.renderMermaid(mermaidCode);
            const dashDiv = document.getElementById('dashDiv');
            if (dashDiv) {
                dashDiv.innerHTML = svg;
                if (bindFunctions) {
                    bindFunctions(dashDiv);
                }
            }
        } catch (error) {
            console.error('Error rendering Mermaid:', error);
        }
    }
    @action handleRenderClick = () => {
        // Call the GPT model and get the HTML output
        // const modelOutput = getHtmlOutput(this.inputValue);
        // this.htmlCode = modelOutput;
        this.generateMermaidCode();
    };
    @action generateMermaidCode=async()=>{
        console.log('Generating Mermaid Code');
        this.loading = true;

        let res = await gptAPICall(this.inputValue, GPTCallType.MERMAID);
        this.loading = false;
        if (res == 'Error connecting with API.') {
            // If GPT call failed
            console.error('GPT call failed');
            this.errorMessage = 'GPT call failed; please try again.';
        } else if(res!=null){
            // If GPT call succeeded, set htmlCode;;; TODO: check if valid html
            if (this.isValidCode(res)) {
                this.mermaidCode = res;
                console.log('GPT call succeeded:' + res);
                this.errorMessage = '';
            } else {
                console.error('GPT call succeeded but invalid html; please try again.');
                this.errorMessage = 'GPT call succeeded but invalid html; please try again.';
            }
        }
        this.renderMermaidAsync.call(this,this.removeWords(this.mermaidCode));
        this.loading = false;
    }
    isValidCode = (html: string) => {
        return true;
    };


    removeWords(inputStr:string) {
        inputStr=inputStr.replace("```mermaid","")
        return inputStr.replace("```","");
    }

    
    createMermaidCode = async (): Promise<string> => {
        let mermaidCode = 'graph LR;';
        if (this.Document.data instanceof List) {
            let docArray: Doc[] = DocListCast(this.Document.data);
            let rectangleArray = docArray.filter(doc => doc.title == 'rectangle' || doc.title == 'circle');
            let lineArray = docArray.filter(doc => doc.title == 'line' || doc.title == 'stroke');
            let textArray = docArray.filter(doc => doc.type == 'rich text');
            for (let i = 0; i < rectangleArray.length; i++) {
                const rectangle = rectangleArray[i];
                for (let j = 0; j < lineArray.length; j++) {
                    const line = lineArray[j];
                    if (this.isLineInFirstBox(rectangle, line)) {
                        for (let k = 0; k < rectangleArray.length; k++) {
                            const rectangle2 = rectangleArray[k];
                            if (this.isLineInSecondBox(rectangle2, line) && typeof rectangle.x === 'number' && typeof rectangle2.x === 'number') {
                                mermaidCode += Math.abs(rectangle.x) + this.getTextInBox(rectangle, textArray) + '---' + Math.abs(rectangle2.x) + this.getTextInBox(rectangle2, textArray) + ';';
                            }
                        }
                    }
                }
            }
        }
        //console.log(mermaidCode);
        return mermaidCode;
    };

    getTextInBox = (box: Doc, richTextArray: Doc[]): string => {
        for (let i = 0; i < richTextArray.length; i++) {
            let textDoc = richTextArray[i];
            if (typeof textDoc.x === 'number' && typeof textDoc.y === 'number' && typeof box.x === 'number' && typeof box.height === 'number' && typeof box.width === 'number' && typeof box.y === 'number') {
                if (textDoc.x > box.x && textDoc.x < box.x + box.width && textDoc.y > box.y && textDoc.y < box.y + box.height) {
                    if (box.title == 'rectangle') {
                        return '(' + (textDoc.text as RichTextField)?.Text + ')';
                    }
                    if (box.title == 'circle') {
                        return '((' + (textDoc.text as RichTextField)?.Text + '))';
                    }
                }
            }
        }
        return '( )';
    };
    isLineInFirstBox = (box: Doc, line: Doc): boolean => {
        if (typeof line.x === 'number' && typeof box.x === 'number' && typeof box.width === 'number' && typeof box.height === 'number' && typeof box.y === 'number' && typeof line.y === 'number') {
            return line.x < box.x + box.width + (box.width + box.x) * 0.1 && line.x > box.x && line.y > box.y && line.y < box.y + box.height;
        } else {
            return false;
        }
    };
    isLineInSecondBox = (box: Doc, line: Doc): boolean => {
        if (typeof line.x === 'number' && typeof line.width === 'number' && typeof box.x === 'number' && typeof box.width === 'number' && typeof box.y === 'number' && typeof box.height === 'number' && typeof line.y === 'number') {
            return line.x + line.width > box.x - (box.x - box.width) * 0.1 && line.x + line.width < box.x + box.width && line.y > box.y && line.y < box.y + box.height;
        } else {
            return false;
        }
    };

    render() {
        console.log(this.loading)
        return(
        <div ref={this._ref} className="DIYNodeBox">
            <div ref={this._dragRef} className="DIYNodeBox-wrapper">
                <div className="search-bar">
                    <input type="text" value={this.inputValue} onChange={this.handleInputChange} />
                    <button onClick={this.handleRenderClick}>Generate</button>
                </div>
                <div className="content">
                    {this.mermaidCode ? (
                        <div id="dashDiv" className="diagramBox"></div>
                    ) : (
                        <div>{this.loading ? <div className="loading-circle"></div> : <div>{this.errorMessage ? this.errorMessage : 'Insert prompt to generate diagram'}</div>}</div>
                    )}
                </div>
            </div>
        </div>
        );
    }
}