require 'rails_helper'

describe Mood do
  let(:user) { create(:user) }
  let(:mode) { create(:mode, user: user) }

  subject { build(:mood, user: user, mode: mode, recorded_at: DateTime.parse("2026-01-15 10:00:00")) }

  it { is_expected.to be_valid }

  describe "validations" do
    it "is invalid without a user" do
      subject.user = nil
      expect(subject).not_to be_valid
    end

    it "is invalid without a mode" do
      subject.mode = nil
      expect(subject).not_to be_valid
    end

    it "is invalid without a recorded_at" do
      subject.recorded_at = nil
      expect(subject).not_to be_valid
    end
  end

  describe "uniqueness per day and user" do
    it "is invalid if a mood already exists for the same day and user" do
      create(:mood, user: user, mode: mode, recorded_at: DateTime.parse("2026-01-15 18:00:00"))
      expect(subject).not_to be_valid
    end

    it "is valid if the same day exists but for a different user" do
      other_user = create(:user)
      other_mode = create(:mode, user: other_user)
      create(:mood, user: other_user, mode: other_mode, recorded_at: DateTime.parse("2026-01-15 10:00:00"))
      expect(subject).to be_valid
    end

    it "is valid if the same user has a mood on a different day" do
      create(:mood, user: user, mode: mode, recorded_at: DateTime.parse("2026-01-14 10:00:00"))
      expect(subject).to be_valid
    end
  end
end