import * as fs from 'fs-extra';
import * as xml2js from 'xml2js';
import * as util from 'util';
import * as _ from 'lodash';
import DiffUtil from './diffUtil';

const nonArayProperties = ['description', 'hasActivationRequired', 'label', 'license', 'userLicense', '$', 'fullName'];

const parser = new xml2js.Parser({
    explicitArray: false,
    valueProcessors: [
        function (name) {
            let result: boolean;
            if (name === 'true') result = true;
            if (name === 'false') result = false;
            return result;
        },
    ],
});

export default abstract class PermsetDiff {
    protected debugFlag: boolean;

    public constructor(debugFlag?: boolean) {
        this.debugFlag = debugFlag;
    }

    public static async generatePermissionsetXml(
        permissionsetXml1: string,
        permissionsetXml2: string,
        outputFilePath: string
    ) {
        const parseString = util.promisify(parser.parseString) as _.Function1<xml2js.convertableToString, Promise<any>>;

        let parseResult = await parseString(permissionsetXml1);
        let permsetObj1 = parseResult.PermissionSet;
        parseResult = await parseString(permissionsetXml2);
        let permsetObj2 = parseResult.PermissionSet;

        let newPermsetObj = {} as any;

        newPermsetObj.label = permsetObj2.label;

        if (!_.isNil(permsetObj2.description)) {
            newPermsetObj.description = permsetObj2.description;
        }
        if (!_.isNil(permsetObj2.license)) {
            newPermsetObj.license = permsetObj2.license;
        }
        if (permsetObj2.hasActivationRequired) {
            newPermsetObj.hasActivationRequired = permsetObj2.hasActivationRequired;
        }

        newPermsetObj.applicationVisibilities = DiffUtil.getChangedOrAdded(
            permsetObj1.applicationVisibilities,
            permsetObj2.applicationVisibilities,
            'application'
        ).addedEdited;
        newPermsetObj.classAccesses = DiffUtil.getChangedOrAdded(
            permsetObj1.classAccesses,
            permsetObj2.classAccesses,
            'apexClass'
        ).addedEdited;
        newPermsetObj.customPermissions = DiffUtil.getChangedOrAdded(
            permsetObj1.customPermissions,
            permsetObj2.customPermissions,
            'name'
        ).addedEdited;
        newPermsetObj.externalDataSourceAccesses = DiffUtil.getChangedOrAdded(
            permsetObj1.externalDataSourceAccesses,
            permsetObj2.externalDataSourceAccesses,
            'externalDataSource'
        ).addedEdited;

        newPermsetObj.fieldPermissions = DiffUtil.getChangedOrAdded(
            permsetObj1.fieldPermissions,
            permsetObj2.fieldPermissions,
            'field'
        ).addedEdited;

        newPermsetObj.objectPermissions = DiffUtil.getChangedOrAdded(
            permsetObj1.objectPermissions,
            permsetObj2.objectPermissions,
            'object'
        ).addedEdited;
        newPermsetObj.pageAccesses = DiffUtil.getChangedOrAdded(
            permsetObj1.pageAccesses,
            permsetObj2.pageAccesses,
            'apexPage'
        ).addedEdited;

        newPermsetObj.recordTypeVisibilities = DiffUtil.getChangedOrAdded(
            permsetObj1.recordTypeVisibilities,
            permsetObj2.recordTypeVisibilities,
            'recordType'
        ).addedEdited;
        newPermsetObj.tabSettings = DiffUtil.getChangedOrAdded(
            permsetObj1.tabSettings,
            permsetObj2.tabSettings,
            'tab'
        ).addedEdited;
        newPermsetObj.userPermissions = DiffUtil.getChangedOrAdded(
            permsetObj1.userPermissions,
            permsetObj2.userPermissions,
            'name'
        ).addedEdited;

        await PermsetDiff.writePermset(newPermsetObj, outputFilePath);
    }

    private static async writePermset(permsetObj: any, filePath: string) {
        //Delete eampty arrays
        for (let key in permsetObj) {
            if (Array.isArray(permsetObj[key])) {
                //All top element must be arays exept non arrayProperties
                if (!nonArayProperties.includes(key) && permsetObj[key].length === 0) {
                    delete permsetObj[key];
                }
            }
        }
        if (permsetObj.label != undefined) {
            let builder = new xml2js.Builder({ rootName: 'PermissionSet' });
            permsetObj['$'] = {
                xmlns: 'http://soap.sforce.com/2006/04/metadata',
            };
            let xml = builder.buildObject(permsetObj);

            fs.writeFileSync(filePath, xml);
        }
    }
}