defmodule AmbryWeb.UserSettingsLive do
  @moduledoc false
  use AmbryWeb, :live_view

  alias Ambry.Accounts

  @impl Phoenix.LiveView
  def render(assigns) do
    ~H"""
    <div class="container mx-auto max-w-md space-y-8 p-8">
      <section>
        <.header>Change Email</.header>

        <.simple_form for={@email_form} id="email_form" phx-submit="update_email" phx-change="validate_email">
          <.input field={@email_form[:email]} type="email" placeholder="Email" required />
          <.input
            field={@email_form[:current_password]}
            name="current_password"
            id="current_password_for_email"
            type="password"
            placeholder="Current password"
            value={@email_form_current_password}
            required
          />
          <:actions>
            <.button phx-disable-with="Changing...">Change Email</.button>
          </:actions>
        </.simple_form>
      </section>
      <section>
        <.header>Change Password</.header>

        <.simple_form
          for={@password_form}
          id="password_form"
          action={~p"/users/log_in?_action=password_updated"}
          method="post"
          phx-change="validate_password"
          phx-submit="update_password"
          phx-trigger-action={@trigger_submit}
        >
          <input name={@password_form[:email].name} type="hidden" value={@current_email} id="hidden_user_email" />
          <.input field={@password_form[:password]} type="password" placeholder="New password" required />
          <.input field={@password_form[:password_confirmation]} type="password" placeholder="Confirm new password" />
          <.input
            field={@password_form[:current_password]}
            name="current_password"
            type="password"
            placeholder="Current password"
            id="current_password_for_password"
            value={@current_password}
            required
          />
          <:actions>
            <.button phx-disable-with="Changing...">Change Password</.button>
          </:actions>
        </.simple_form>
      </section>
    </div>
    """
  end

  @impl Phoenix.LiveView
  def mount(%{"token" => token}, _session, socket) do
    socket =
      case Accounts.update_user_email(socket.assigns.current_user, token) do
        :ok ->
          put_flash(socket, :info, "Email changed successfully.")

        :error ->
          put_flash(socket, :error, "Email change link is invalid or it has expired.")
      end

    {:ok, push_navigate(socket, to: ~p"/users/settings")}
  end

  def mount(_params, _session, socket) do
    user = socket.assigns.current_user
    email_changeset = Accounts.change_user_email(user)
    password_changeset = Accounts.change_user_password(user)

    socket =
      socket
      |> assign(:current_password, nil)
      |> assign(:email_form_current_password, nil)
      |> assign(:current_email, user.email)
      |> assign(:email_form, to_form(email_changeset))
      |> assign(:password_form, to_form(password_changeset))
      |> assign(:trigger_submit, false)

    {:ok, socket}
  end

  @impl Phoenix.LiveView
  def handle_event("validate_email", params, socket) do
    %{"current_password" => password, "user" => user_params} = params

    email_form =
      socket.assigns.current_user
      |> Accounts.change_user_email(user_params)
      |> Map.put(:action, :validate)
      |> to_form()

    {:noreply, assign(socket, email_form: email_form, email_form_current_password: password)}
  end

  def handle_event("update_email", params, socket) do
    %{"current_password" => password, "user" => user_params} = params
    user = socket.assigns.current_user

    case Accounts.apply_user_email(user, password, user_params) do
      {:ok, applied_user} ->
        {:ok, _token} =
          Accounts.deliver_user_update_email_instructions(
            applied_user,
            user.email,
            &url(~p"/users/settings/confirm_email/#{&1}")
          )

        info = "A link to confirm your email change has been sent to the new address."
        {:noreply, socket |> put_flash(:info, info) |> assign(email_form_current_password: nil)}

      {:error, changeset} ->
        {:noreply, assign(socket, :email_form, to_form(Map.put(changeset, :action, :insert)))}
    end
  end

  def handle_event("validate_password", params, socket) do
    %{"current_password" => password, "user" => user_params} = params

    password_form =
      socket.assigns.current_user
      |> Accounts.change_user_password(user_params)
      |> Map.put(:action, :validate)
      |> to_form()

    {:noreply, assign(socket, password_form: password_form, current_password: password)}
  end

  def handle_event("update_password", params, socket) do
    %{"current_password" => password, "user" => user_params} = params
    user = socket.assigns.current_user

    case Accounts.update_user_password(user, password, user_params) do
      {:ok, user} ->
        password_form =
          user
          |> Accounts.change_user_password(user_params)
          |> to_form()

        {:noreply, assign(socket, trigger_submit: true, password_form: password_form)}

      {:error, changeset} ->
        {:noreply, assign(socket, password_form: to_form(changeset))}
    end
  end
end
