@using Management.Web.Shared.Components
@inject ICanvasService canvas
@inject CoursePlanner planner


@code {
  protected override void OnInitialized()
  {
    planner.StateHasChanged += reload;
  }
  private void reload()
  {
    this.InvokeAsync(this.StateHasChanged);
  }
  public void Dispose()
  {
    planner.StateHasChanged -= reload;
  }

  private bool syncingAssignmentGroups { get; set; } = false;
  private void AddAssignmentGroup()
  {
    if(planner.LocalCourse != null)
    {
      var newGroup = new LocalAssignmentGroup
      {
        Name = "",
        Weight = 0,
        Id = Guid.NewGuid().ToString()
      };

      var updatedGroups = planner.LocalCourse.Settings.AssignmentGroups.Append(newGroup);
      planner.LocalCourse = planner.LocalCourse with
      {
        Settings = planner.LocalCourse.Settings with
        {
          AssignmentGroups = updatedGroups
        }
      };
    }
  }

  private Action<ChangeEventArgs> saveGroupName(string groupId)
  {
    return (e) =>
    {
      if(planner.LocalCourse != null)
      {
        var newName = e.Value?.ToString() ?? "";
        var newGroups = planner.LocalCourse.Settings.AssignmentGroups.Select(
          g => g.Id == groupId
            ? g with { Name = newName }
            : g
        );
        planner.LocalCourse = planner.LocalCourse with
        {
          Settings = planner.LocalCourse.Settings with
          {
            AssignmentGroups = newGroups
          }
        };
      }
    };
  }
  private Action<ChangeEventArgs> saveGroupWeight(string groupId)
  {
    return (e) =>
    {
      if(planner.LocalCourse != null)
      {
        var newWeight = double.Parse(e.Value?.ToString() ?? "0");
        var newGroups = planner.LocalCourse.Settings.AssignmentGroups.Select(
          g => g.Id == groupId
            ? g with { Weight = newWeight }
            : g
        );
        planner.LocalCourse = planner.LocalCourse with
        {
          Settings = planner.LocalCourse.Settings with
          {
            AssignmentGroups = newGroups
          }
        };
      }
    };
  }

  private async Task SyncAssignmentGroupsWithCanvas()
  {
    syncingAssignmentGroups = true;
    await planner.SyncAssignmentGroups();
    syncingAssignmentGroups = false;
  }
}

@if(planner.LocalCourse != null)
{
  <h4 class="text-center">Assignment Groups</h4>
  @foreach (var group in planner.LocalCourse.Settings.AssignmentGroups)
  {
    var groupName = group.Name;
    var nameInputCallback = saveGroupName(group.Id);
    var weight = group.Weight;
    var weightInputCallback = saveGroupWeight(group.Id);
    <div class="row">
      <div class="col-auto">
        <label class="form-label">Group Name</label>
        <input
          class="form-control"
          @bind="groupName" @oninput="nameInputCallback">
      </div>
      <div class="col-auto">
        <label class="form-label">Weight</label>
        <input
          class="form-control"
          @bind="weight"
          @oninput="weightInputCallback"
        >
      </div>
    </div>
  }
  <div class="d-flex justify-content-end">
    <button
      class="btn btn-outline-primary"
      @onclick="AddAssignmentGroup"
    >
      + Assignment Group
    </button>
  </div>

  <button
    class="btn btn-outline-secondary"
    @onclick="SyncAssignmentGroupsWithCanvas"
    disabled="@syncingAssignmentGroups"
  >
    Sync Assignment Groups With Canvas
  </button>
  @if(syncingAssignmentGroups)
  {
    <Spinner />
  }
}