public with sharing class AccountService {

    public class AccountServiceException extends Exception {}

    @AuraEnabled(cacheable=true)
    public static List<Account> getTopAccounts(Integer limitSize) {
        if (limitSize == null || limitSize <= 0) {
            limitSize = 10;
        }
        return [
            SELECT Id, Name, Industry, AnnualRevenue, OwnerId
            FROM Account
            WHERE AnnualRevenue != null
            WITH SECURITY_ENFORCED
            ORDER BY AnnualRevenue DESC
            LIMIT :limitSize
        ];
    }

    public static void recalculateRatings(List<Account> accounts) {
        for (Account acc : accounts) {
            if (acc.AnnualRevenue == null) {
                acc.Rating = 'Cold';
            } else if (acc.AnnualRevenue >= 1000000) {
                acc.Rating = 'Hot';
            } else {
                acc.Rating = 'Warm';
            }
        }
        update accounts;
    }
}


public with sharing class AccountService {

    public class AccountServiceException extends Exception {}

    @AuraEnabled(cacheable=true)
    public static List<Account> getTopAccounts(Integer limitSize) {
        if (limitSize == null || limitSize <= 0) {
            limitSize = 10;
        }
        return [
            SELECT Id, Name, Industry, AnnualRevenue, OwnerId
            FROM Account
            WHERE AnnualRevenue != null
            WITH SECURITY_ENFORCED
            ORDER BY AnnualRevenue DESC
            LIMIT :limitSize
        ];
    }

    public static void recalculateRatings(List<Account> accounts) {
        for (Account acc : accounts) {
            if (acc.AnnualRevenue == null) {
                acc.Rating = 'Cold';
            } else if (acc.AnnualRevenue >= 1000000) {
                acc.Rating = 'Hot';
            } else {
                acc.Rating = 'Warm';
            }
        }
        update accounts;
    }
}

public with sharing class OpportunityTriggerHandler {

    public static void handleBeforeUpdate(
        List<Opportunity> newList,
        Map<Id, Opportunity> oldMap
    ) {
        for (Opportunity opp : newList) {
            Opportunity old = oldMap.get(opp.Id);
            if (opp.StageName != old.StageName
                && opp.StageName == 'Closed Won') {
                opp.CloseDate = Date.today();
            }
        }
    }

    public static void handleAfterInsert(List<Opportunity> newList) {
        List<Task> tasks = new List<Task>();
        for (Opportunity opp : newList) {
            tasks.add(new Task(
                WhatId = opp.Id,
                Subject = 'Follow up with customer',
                ActivityDate = Date.today().addDays(3),
                Priority = 'High'
            ));
        }
        if (!tasks.isEmpty()) {
            insert tasks;
        }
    }
}


public with sharing class OpportunityTriggerHandler {

    public static void handleBeforeUpdate(
        List<Opportunity> newList,
        Map<Id, Opportunity> oldMap
    ) {
        for (Opportunity opp : newList) {
            Opportunity old = oldMap.get(opp.Id);
            if (opp.StageName != old.StageName
                && opp.StageName == 'Closed Won') {
                opp.CloseDate = Date.today();
            }
        }
    }

    public static void handleAfterInsert(List<Opportunity> newList) {
        List<Task> tasks = new List<Task>();
        for (Opportunity opp : newList) {
            tasks.add(new Task(
                WhatId = opp.Id,
                Subject = 'Follow up with customer',
                ActivityDate = Date.today().addDays(3),
                Priority = 'High'
            ));
        }
        if (!tasks.isEmpty()) {
            insert tasks;
        }
    }
}