using System;
using System.Collections.Generic;
using System.Linq;
//+
namespace TabulaRasa.Service
{
    public class PersonService : IPersonService
    {
        private static List<Person> personDatabase = null;

        //+
        //- @Ctor -//
        public PersonService()
        {
        }

        //+
        //- @InitDatabase -//
        public void InitDatabase()
        {
            personDatabase = new List<Person>(
                new Person[] {
                    new Person{
                         Id=1, FirstName="David", LastName="Betz",
                         City="Unknown", PostalCode="12345", State="KS"
                    },
                    new Person{
                         Id=2, FirstName="John", LastName="Doe",
                         City="Unknown", PostalCode="23456", State="MA"
                    },
                    new Person{
                         Id=3, FirstName="Bob", LastName="Smith",
                         City="Unknown", PostalCode="45678", State="MO"
                    },
                    new Person{
                         Id=4, FirstName="Jane", LastName="Doe",
                         City="Unknown", PostalCode="34567", State="FL"
                    },
                    new Person{
                         Id=5, FirstName="John", LastName="Smith",
                         City="Unknown", PostalCode="56789", State="VA"
                    }
                }
            );
        }

        //+
        //- @LoadPersonList -//
        public List<Person> LoadPersonList()
        {
            if (personDatabase == null) { InitDatabase(); }
            //+
            return personDatabase;
        }

        //- @LoadPerson -//
        public Person LoadPerson(Int32 personId)
        {
            if (personDatabase == null) { InitDatabase(); }
            //+
            return personDatabase.SingleOrDefault(p => p.Id == personId);
        }

        //- @LoadPersonWithSimulatedException -//
        public Person LoadPersonWithSimulatedException( )
        {
            if (personDatabase == null) { InitDatabase(); }
            //+
            return personDatabase.Single(p => p.Id == 100);
        }

        //- @SavePerson -//
        public Int32 SavePerson(Person person)
        {
            if (personDatabase == null) { InitDatabase(); }
            //+
            lock (personDatabase)
            {
                Int32 max = personDatabase.Max(p => p.Id);
                person.Id = max + 1;
                personDatabase.Add(person);
                //+
                return person.Id;
            }
        }
    }
}