//Two commands around account object
// 1: /[cmd] account new [name]: creates a new account with [name]
// 2: /[cmd] account list: list recently viewed accounts of user
public class AccountCommand implements ISlackCommand{
    public SlackCommand.SlackResponse getResponse(SlackCommand.SlackCommandParams params){
        try{
            User u = [SELECT Id FROM User WHERE Slack_User_Id__c =:params.userId];
            String instance = [SELECT InstanceName FROM Organization LIMIT 1].InstanceName;
            if(params.text.startsWith('accounts new')){
                Account acc = new Account(Name = params.text.split(' ')[2], OwnerId = u.Id);
                insert acc;

                String msg = String.format(
                    'Account Created: <https://{0}.salesforce.com/{1}|{2}>',
                    new String[]{
                        instance,
                        acc.Id,
                        acc.Name
                    }
                );
                return new SlackCommand.SlackResponse(msg);
            }else if(params.text.startsWith('accounts list')){
                List<String> accs = new List<String>();
                for(Account acc : [SELECT Name
                                    FROM Account WHERE OwnerId = :u.Id
                                    ORDER BY LastViewedDate DESC Limit 10]){
                    accs.add(String.format(
                        '<https://{0}.salesforce.com/{1}|{2}>',
                        new String[]{
                            instance,
                            acc.Id,
                            acc.Name
                        }
                    ));
                }
                return new SlackCommand.SlackResponse(String.join(accs,'\n'));
            }else{
                return new SlackCommand.SlackResponse('No Matching Command found... Try `/[cmd] account new [name]` or `/[cmd] account list`');
            }
        }catch(Exception e){
            return new SlackCommand.SlackResponse('Error:' + e.getMessage());
        }
    }
}