import { Inject, Injectable, OnApplicationBootstrap } from '@nestjs/common';
import { DocumentLineItem, DocumentLineItemStatusChangedEvent, DocumentStatusType, EventBus, Logger, PhoenixPlugin, PluginCommonModule } from '@phoenix/core';

// Example service for the plugin
@Injectable()
export class AmplidService {

    getPluginInfo() {
        return {
            name: 'AmplidPlugin',
            version: '1.0.0',
            description: ''
        };
    }
}

// The main plugin class using the PhoenixPlugin decorator
@PhoenixPlugin({
    imports: [PluginCommonModule],
    controllers: [],
    providers: [AmplidService],
    exports: [AmplidService]
})
export class AmplidPlugin implements OnApplicationBootstrap {

    private customFieldForBestellteMenge = 'bestelltemenge'; //bestellteMenge

    @Inject(EventBus)
    private readonly eventBus!: EventBus;

    private readonly logger = Logger.forContext(this);

    // Required static init method for Phoenix plugins
    static init(): typeof AmplidPlugin {
        console.log('AmplidPlugin initialized');
        return AmplidPlugin;
    }

    async onApplicationBootstrap() {
        this.setupEvents();
    }

    setupEvents() {
        this.eventBus.registerBlockingEventHandler(DocumentLineItemStatusChangedEvent, {
            id: 'amplid-plugin-document-line-item-status-changed',
            handler: async (event) => {
                if (event.newStatus == DocumentStatusType.COMPLETED) {

                    if (!event.dli) {
                        this.logger.error(`DocumentLineItem not found in event`, "AMPLID PLUGIN");
                        return;
                    }

                    let bestellteMenge = +event.dli.customFields?.[this.customFieldForBestellteMenge];

                    if (bestellteMenge && bestellteMenge > 0) {
                        if (bestellteMenge == event.dli.quantity && event.dli.openQuantity == 0) {
                            //we are good, we can keep it being completed
                            this.logger.info(`Keeping status as completed for DocumentLineItem ${event.dli.id} because bestellteMenge ${bestellteMenge} is equal to quantity ${event.dli.quantity} and openQuantity ${event.dli.openQuantity}`);
                        } else {
                            //we need to change the status to inwork
                            this.logger.info(`Changing status to inwork for DocumentLineItem ${event.dli.id} because bestellteMenge ${bestellteMenge} is not equal to quantity ${event.dli.quantity} and openQuantity ${event.dli.openQuantity}`);
                            event.dli.status = DocumentStatusType.INWORK;
                            await DocumentLineItem.update(event.dli.id, { status: DocumentStatusType.INWORK });
                        }
                    }
                    else {
                        this.logger.info(`Keeping status as completed for DocumentLineItem ${event.dli.id} because bestelltemenge  ${bestellteMenge} is not set`);
                    }
                }
            },
        });
    }
}