import { action, makeAutoObservable } from 'mobx';
import { Col } from '../DocCreatorMenu';
import { FieldSettings } from '../TemplateFieldTypes/TemplateField';
import { Template } from '../Template';
import { Doc, NumListCast } from '../../../../../../fields/Doc';
import { DataVizBox } from '../../DataVizBox';
import { TemplateFieldType } from '../TemplateBackend';
import { TemplateMenuAIUtils } from './TemplateMenuAIUtils';

export type Conditional = {
    field: string;
    operator: '=' | '>' | '<';
    condition: string;
    target: 'self' | 'template';
    attribute: string;
    value: string;
}

export class TemplateManager {

    templates: Template[] = [];

    conditionalFieldLogic: Record<string, Conditional[]> = {};

    constructor(templateSettings: FieldSettings[]) {
        makeAutoObservable(this);
        this.templates = this.initializeTemplates(templateSettings);
    }

    initializeTemplates = (templateSettings: FieldSettings[]) => templateSettings.map(settings => {
        return new Template(settings)});

    getValidTemplates = (cols: Col[]) => this.templates.filter(template => template.isValidTemplate(cols));

    addTemplate = (newTemplate: Template) => this.templates.push(newTemplate);

    removeTemplate = (template: Template) => {
        this.templates.splice(this.templates.indexOf(template), 1);
        template.cleanup();
    };

    addFieldCondition = (fieldTitle: string, condition: Conditional) => {
        if (this.conditionalFieldLogic[fieldTitle] === undefined) {
            this.conditionalFieldLogic[fieldTitle] = [condition];
        } else {
            this.conditionalFieldLogic[fieldTitle].push(condition);
        }
    }

    removeFieldCondition = (fieldTitle: string, condition: Conditional) => {
        if (this.conditionalFieldLogic[fieldTitle]) {
            this.conditionalFieldLogic[fieldTitle] = this.conditionalFieldLogic[fieldTitle].filter(cond => cond !== condition);
        }
    }

    createDocsFromTemplate = action((dv: DataVizBox, template: Template, cols: Col[], debug: boolean = false) => {
        const fields = Array.from(Object.keys(dv.records[0]));

        const processContent = async (content: { [title: string]: string }) => {
            const templateCopy = template.clone();

            fields
                .filter(title => title)
                .forEach(title => {
                    const field = templateCopy.getFieldByTitle(title);
                    field && field.setContent(content[title], field.viewType);
                });

            const gptFunc = (type: TemplateFieldType) => (type === TemplateFieldType.VISUAL ? TemplateMenuAIUtils.renderGPTImageCall : TemplateMenuAIUtils.renderGPTTextCall);
            const applyGPTContent = async () => {
                const promises = cols
                    .filter(field => field.AIGenerated)
                    .map(field => {
                        const templateField = templateCopy.getFieldByTitle(field.title);
                        if (templateField !== undefined) {
                            return gptFunc(field.type)(templateCopy, field, templateField.getID);
                        }
                        return null; 
                    })
                    .filter(p => p !== null);
            
                await Promise.all(promises);
            };

            await applyGPTContent();

            templateCopy.applyConditionalLogic(this.conditionalFieldLogic);

            return templateCopy.getRenderedDoc();
        };

        const rowContents = debug
            ? [{}, {}, {}, {}]
            : NumListCast(dv.layoutDoc.dataViz_selectedRows).map(row =>
                  fields.reduce(
                      (values, col) => {
                          values[col] = dv.records[row][col];
                          return values;
                      },
                      {} as { [title: string]: string }
                  )
              );

        return Promise.all(rowContents.map(processContent)).then(
            action(renderedDocs => {
                return renderedDocs;
            })
        );
    });
}