defmodule MvWeb.MemberLive.ShowMembershipFeesTest do
  @moduledoc """
  Tests for membership fees section in member detail view.
  """
  use MvWeb.ConnCase, async: false

  import Phoenix.LiveViewTest

  alias Mv.Membership.Member
  alias Mv.MembershipFees.MembershipFeeType
  alias Mv.MembershipFees.MembershipFeeCycle

  require Ash.Query

  setup %{conn: conn} do
    # Create admin user
    {:ok, user} =
      Mv.Accounts.User
      |> Ash.Changeset.for_create(:register_with_password, %{
        email: "admin#{System.unique_integer([:positive])}@mv.local",
        password: "testpassword123"
      })
      |> Ash.create()

    conn = conn_with_password_user(conn, user)
    %{conn: conn, user: user}
  end

  # Helper to create a membership fee type
  defp create_fee_type(attrs) do
    default_attrs = %{
      name: "Test Fee Type #{System.unique_integer([:positive])}",
      amount: Decimal.new("50.00"),
      interval: :yearly
    }

    attrs = Map.merge(default_attrs, attrs)

    MembershipFeeType
    |> Ash.Changeset.for_create(:create, attrs)
    |> Ash.create!()
  end

  # Helper to create a member
  defp create_member(attrs) do
    default_attrs = %{
      first_name: "Test",
      last_name: "Member",
      email: "test.member.#{System.unique_integer([:positive])}@example.com"
    }

    attrs = Map.merge(default_attrs, attrs)

    Member
    |> Ash.Changeset.for_create(:create_member, attrs)
    |> Ash.create!()
  end

  # Helper to create a cycle
  defp create_cycle(member, fee_type, attrs) do
    default_attrs = %{
      cycle_start: ~D[2023-01-01],
      amount: Decimal.new("50.00"),
      member_id: member.id,
      membership_fee_type_id: fee_type.id,
      status: :unpaid
    }

    attrs = Map.merge(default_attrs, attrs)

    MembershipFeeCycle
    |> Ash.Changeset.for_create(:create, attrs)
    |> Ash.create!()
  end

  describe "cycles table display" do
    test "displays all cycles for member", %{conn: conn} do
      fee_type = create_fee_type(%{interval: :yearly})
      member = create_member(%{membership_fee_type_id: fee_type.id})

      _cycle1 = create_cycle(member, fee_type, %{cycle_start: ~D[2022-01-01], status: :paid})
      _cycle2 = create_cycle(member, fee_type, %{cycle_start: ~D[2023-01-01], status: :unpaid})

      {:ok, view, _html} = live(conn, "/members/#{member.id}")

      # Switch to membership fees tab
      view
      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
      |> render_click()

      html = render(view)

      # Should show cycles table
      assert html =~ "Membership Fees" || html =~ "Mitgliedsbeiträge"
      # Check for formatted cycle dates (e.g., "01.01.2022" or "2022")
      assert html =~ "2022" || html =~ "2023" || html =~ "01.01.2022" || html =~ "01.01.2023"
    end

    test "table columns show correct data", %{conn: conn} do
      fee_type = create_fee_type(%{interval: :yearly, amount: Decimal.new("60.00")})
      member = create_member(%{membership_fee_type_id: fee_type.id})

      create_cycle(member, fee_type, %{
        cycle_start: ~D[2023-01-01],
        amount: Decimal.new("60.00"),
        status: :paid
      })

      {:ok, view, _html} = live(conn, "/members/#{member.id}")

      # Switch to membership fees tab
      view
      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
      |> render_click()

      html = render(view)

      # Should show interval, amount, status
      assert html =~ "Yearly" || html =~ "Jährlich"
      assert html =~ "60" || html =~ "60,00"
      assert html =~ "paid" || html =~ "bezahlt"
    end
  end

  describe "membership fee type display" do
    test "shows assigned membership fee type", %{conn: conn} do
      yearly_type = create_fee_type(%{interval: :yearly, name: "Yearly Type"})
      _monthly_type = create_fee_type(%{interval: :monthly, name: "Monthly Type"})

      member = create_member(%{membership_fee_type_id: yearly_type.id})

      {:ok, _view, html} = live(conn, "/members/#{member.id}")

      # Should show yearly type name
      assert html =~ "Yearly Type"
    end

    test "shows no type message when no type assigned", %{conn: conn} do
      member = create_member(%{})

      {:ok, _view, html} = live(conn, "/members/#{member.id}")

      # Should show message about no type assigned
      assert html =~ "No membership fee type assigned" || html =~ "No type"
    end
  end

  describe "status change actions" do
    test "mark as paid works", %{conn: conn} do
      fee_type = create_fee_type(%{interval: :yearly})
      member = create_member(%{membership_fee_type_id: fee_type.id})

      cycle = create_cycle(member, fee_type, %{cycle_start: ~D[2023-01-01], status: :unpaid})

      {:ok, view, _html} = live(conn, "/members/#{member.id}")

      # Switch to membership fees tab
      view
      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
      |> render_click()

      # Mark as paid
      view
      |> element("button[phx-click='mark_cycle_status'][phx-value-cycle_id='#{cycle.id}'][phx-value-status='paid']")
      |> render_click()

      # Verify cycle is now paid
      updated_cycle = Ash.read_one!(MembershipFeeCycle |> Ash.Query.filter(id == ^cycle.id))
      assert updated_cycle.status == :paid
    end

    test "mark as suspended works", %{conn: conn} do
      fee_type = create_fee_type(%{interval: :yearly})
      member = create_member(%{membership_fee_type_id: fee_type.id})

      cycle = create_cycle(member, fee_type, %{cycle_start: ~D[2023-01-01], status: :unpaid})

      {:ok, view, _html} = live(conn, "/members/#{member.id}")

      # Switch to membership fees tab
      view
      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
      |> render_click()

      # Mark as suspended
      view
      |> element("button[phx-click='mark_cycle_status'][phx-value-cycle_id='#{cycle.id}'][phx-value-status='suspended']")
      |> render_click()

      # Verify cycle is now suspended
      updated_cycle = Ash.read_one!(MembershipFeeCycle |> Ash.Query.filter(id == ^cycle.id))
      assert updated_cycle.status == :suspended
    end

    test "mark as unpaid works", %{conn: conn} do
      fee_type = create_fee_type(%{interval: :yearly})
      member = create_member(%{membership_fee_type_id: fee_type.id})

      cycle = create_cycle(member, fee_type, %{cycle_start: ~D[2023-01-01], status: :paid})

      {:ok, view, _html} = live(conn, "/members/#{member.id}")

      # Switch to membership fees tab
      view
      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
      |> render_click()

      # Mark as unpaid
      view
      |> element("button[phx-click='mark_cycle_status'][phx-value-cycle_id='#{cycle.id}'][phx-value-status='unpaid']")
      |> render_click()

      # Verify cycle is now unpaid
      updated_cycle = Ash.read_one!(MembershipFeeCycle |> Ash.Query.filter(id == ^cycle.id))
      assert updated_cycle.status == :unpaid
    end
  end

  describe "cycle regeneration" do
    test "manual regeneration works", %{conn: conn} do
      fee_type = create_fee_type(%{interval: :yearly})
      # Create member with join_date in the past to ensure cycles can be generated
      member =
        create_member(%{
          membership_fee_type_id: fee_type.id,
          join_date: ~D[2020-01-15]
        })

      # Get initial cycle count (may be 0 if cycles weren't auto-generated)
      initial_cycles =
        MembershipFeeCycle
        |> Ash.Query.filter(member_id == ^member.id)
        |> Ash.read!()

      {:ok, view, _html} = live(conn, "/members/#{member.id}")

      # Switch to membership fees tab
      view
      |> element("button[phx-click='switch_tab'][phx-value-tab='membership_fees']")
      |> render_click()

      # Trigger regeneration
      html =
        view
        |> element("button[phx-click='regenerate_cycles']")
        |> render_click()

      # Check that flash message appears (indicates action completed)
      assert html =~ "regenerated" || html =~ "successfully" || html =~ "erfolgreich"

      # Check that cycles exist (should have at least some cycles for a member from 2020)
      cycles =
        MembershipFeeCycle
        |> Ash.Query.filter(member_id == ^member.id)
        |> Ash.read!()

      # Should have cycles generated (at least initial ones, possibly more)
      assert length(cycles) >= length(initial_cycles)
      # For a member from 2020, we should definitely have cycles by now
      assert length(cycles) > 0
    end
  end

  describe "edge cases" do
    test "handles members without membership fee type gracefully", %{conn: conn} do
      # No fee type
      member = create_member(%{})

      {:ok, _view, html} = live(conn, "/members/#{member.id}")

      # Should not crash
      assert html =~ member.first_name
    end
  end
end