using EntityFrameworkCore.Data;
using Microsoft.EntityFrameworkCore;

using var context = new DeadBallZoneLeagueDbContext();

//PrintTeams();

var teamOne = await context.Teams.FirstAsync(t => t.TeamId == 1);
var teamTwo = await context.Teams.FirstAsync(t => t.TeamId == 2);
var teamThree = await context.Teams.SingleAsync(t => t.TeamId == 3);
var teamFour = await context.Teams.SingleOrDefaultAsync(t => t.TeamId == 3);

// There is no entry for coaches yet, this function will provide a null to coach.
// Rather than raise: "System.InvalidOperationException: Sequence contains no elements."
var coach = await context.Coaches.FirstOrDefaultAsync();

async Task CountFunctionsTeams(int id)
{
  var numberOfTeams = await context.Teams.CountAsync(t => t.TeamId > id);
  Console.WriteLine($"Number of teams with ID > {id}: {numberOfTeams}");

  var maxTeams = await context.Teams.MaxAsync(t => t.TeamId);
  Console.WriteLine($"Max teams: {maxTeams}");

  var minTeams = await context.Teams.MinAsync(t => t.TeamId);
  Console.WriteLine($"Min teams: {minTeams}");

  var averageTeams = await context.Teams.AverageAsync(t => t.TeamId);
  Console.WriteLine($"Average teams: {averageTeams}");

  var sumTeams = await context.Teams.SumAsync(t => t.TeamId);
  Console.WriteLine($"Sum team IDs: {sumTeams}");
}

async Task GetAllTeamsQuerySyntax(string searchTerm)
{
  var teams = await (
    from team in context.Teams
    where EF.Functions.Like(team.Name, $"%{searchTerm}%")
    select team)
    .ToListAsync();
  foreach (var team in teams)
  {
    Console.WriteLine(team.Name);
  }
}

async Task PrintTeams()
{
  var teams = await context.Teams.ToListAsync();

  foreach (var team in teams)
  {
    Console.WriteLine(team.Name);
  }
}

async Task PrintFilteredTeams()
{
  Console.WriteLine("Enter search term: ");
  var searchTerm = Console.ReadLine();

  // var filteredTeams = await context.Teams.Where(t => t.Name.Contains(searchTerm)).ToListAsync();
  var filteredTeams = await context.Teams.Where(t => EF.Functions.Like(t.Name, $"%{searchTerm}%")).ToListAsync();
  foreach (var team in filteredTeams)
  {
    Console.WriteLine(team.Name);
  }
}

async Task PrintTeamById(int id)
{
  // Selection based on finding the Primary Key.
  var teamBasedOnId = await context.Teams.FindAsync(id);
  if (teamBasedOnId != null)
  {
    Console.WriteLine(teamBasedOnId.Name);
  }
}