defmodule BerrypodWeb.Admin.EmailSettingsTest do
  use BerrypodWeb.ConnCase, async: false

  import Phoenix.LiveViewTest
  import Berrypod.AccountsFixtures

  alias Berrypod.{Mailer, Settings}

  setup do
    # Ensure mailer starts as test adapter and restore on exit
    original = Application.get_env(:berrypod, Berrypod.Mailer)
    Application.put_env(:berrypod, Berrypod.Mailer, adapter: Swoosh.Adapters.Test)

    on_exit(fn ->
      Application.put_env(:berrypod, Berrypod.Mailer, original)
    end)

    user = user_fixture()
    %{user: user}
  end

  describe "authenticated" do
    setup %{conn: conn, user: user} do
      conn = log_in_user(conn, user)
      %{conn: conn}
    end

    test "renders email settings page with provider cards", %{conn: conn} do
      {:ok, _view, html} = live(conn, ~p"/admin/settings/email")

      assert html =~ "Email settings"
      assert html =~ "Choose a provider"
      # Provider names rendered as radio cards
      assert html =~ "Brevo"
      assert html =~ "Mailjet"
      assert html =~ "MailPace"
      assert html =~ "Postal"
    end

    test "shows setup guidance", %{conn: conn} do
      {:ok, _view, html} = live(conn, ~p"/admin/settings/email")

      assert html =~ "needs an email provider"
      assert html =~ "Paste your API key"
      assert html =~ "300 emails/day free"
    end

    test "selecting a provider shows its config fields", %{conn: conn} do
      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      # Select SMTP via form change (radio inputs fire phx-change)
      html =
        view
        |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "smtp"}})
        |> render_change()

      assert html =~ "Server host"
      assert html =~ "Port"
      assert html =~ "Username"
      assert html =~ "Password"
    end

    test "selecting a different provider shows different fields", %{conn: conn} do
      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      # Select Brevo which needs just an api_key
      html =
        view
        |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "brevo"}})
        |> render_change()

      assert html =~ "API key"
      assert html =~ "Brevo"
    end

    test "saving config persists settings", %{conn: conn} do
      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      # Select Brevo via form change
      view
      |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "brevo"}})
      |> render_change()

      # Submit with an API key
      html =
        view
        |> form("form[phx-submit=\"save\"]", %{
          email: %{adapter: "brevo", api_key: "xkeysib-abc123def456"}
        })
        |> render_submit()

      assert html =~ "Settings saved"
      assert Settings.get_setting("email_adapter") == "brevo"
    end

    test "saving without required fields shows error", %{conn: conn} do
      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      # Select Brevo
      view
      |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "brevo"}})
      |> render_change()

      # Submit without API key
      html =
        view
        |> form("form[phx-submit=\"save\"]", %{email: %{adapter: "brevo", api_key: ""}})
        |> render_submit()

      assert html =~ "API key is required"
    end

    test "shows test email section when configured", %{conn: conn} do
      Settings.put_setting("email_adapter", "postmark")
      Settings.put_secret("email_postmark_api_key", "pm_test_abc")

      {:ok, _view, html} = live(conn, ~p"/admin/settings/email")

      assert html =~ "Send a test email"
      assert html =~ "Send test email"
    end

    test "hides test email section when not configured", %{conn: conn} do
      # Ensure clean state — no adapter configured
      Settings.delete_setting("email_adapter")
      Application.put_env(:berrypod, Berrypod.Mailer, adapter: Swoosh.Adapters.Local)

      {:ok, _view, html} = live(conn, ~p"/admin/settings/email")

      refute html =~ "Send test email"
    end

    test "sending test email shows success and sets verified flag", %{conn: conn} do
      Settings.put_setting("email_adapter", "postmark")
      Settings.put_secret("email_postmark_api_key", "pm_test_abc")

      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      html = render_click(view, "send_test")

      assert html =~ "Email is working"
      assert html =~ "Send again"
      assert Mailer.email_verified?()
    end

    test "switching provider clears old provider settings", %{conn: conn} do
      # Save Mailjet config first
      Settings.put_setting("email_adapter", "mailjet")
      Settings.put_secret("email_mailjet_api_key", "mj-key-123")
      Settings.put_secret("email_mailjet_secret", "mj-secret-456")

      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      # Switch to Brevo and save
      view
      |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "brevo"}})
      |> render_change()

      view
      |> form("form[phx-submit=\"save\"]", %{
        email: %{adapter: "brevo", api_key: "xkeysib-switch-test"}
      })
      |> render_submit()

      # Old Mailjet settings should be deleted
      assert Settings.get_setting("email_adapter") == "brevo"
      refute Settings.has_secret?("email_mailjet_api_key")
      refute Settings.has_secret?("email_mailjet_secret")
      # New Brevo key should exist
      assert Settings.has_secret?("email_brevo_api_key")
    end

    test "saving config clears verified flag", %{conn: conn} do
      Mailer.mark_email_verified()
      assert Mailer.email_verified?()

      {:ok, view, _html} = live(conn, ~p"/admin/settings/email")

      view
      |> form("form[phx-change=\"change_adapter\"]", %{email: %{adapter: "brevo"}})
      |> render_change()

      view
      |> form("form[phx-submit=\"save\"]", %{
        email: %{adapter: "brevo", api_key: "xkeysib-def789ghi012"}
      })
      |> render_submit()

      refute Mailer.email_verified?()
    end
  end

  describe "unauthenticated" do
    test "redirects to login", %{conn: conn} do
      {:error, redirect} = live(conn, ~p"/admin/settings/email")
      assert {:redirect, %{to: path}} = redirect
      assert path == ~p"/users/log-in"
    end
  end
end