defmodule ProviderServiceWeb.ProviderController do
  use ProviderServiceWeb, :controller
  use OpenApiSpex.ControllerSpecs

  alias ProviderService.CommandedApp
  alias ProviderService.Queries.ProviderQueries

  alias ProviderService.Commands.{
    RegisterProvider,
    UpdateProvider,
    DeactivateProvider,
    ReactivateProvider
  }

  alias ProviderServiceWeb.Schemas.Provider, as: PS

  operation(:index,
    summary: "List providers",
    parameters: [
      "page[number]": [in: :query, type: :integer, required: false],
      "page[size]": [in: :query, type: :integer, required: false],
      "filters[0][field]": [in: :query, type: :string, required: false],
      "filters[0][op]": [in: :query, type: :string, required: false],
      "filters[0][value]": [in: :query, type: :string, required: false]
    ],
    responses: [
      ok: {"Provider list", "application/json", PS.ProviderListResponse}
    ]
  )

  def index(conn, params) do
    case ProviderQueries.list_providers(params) do
      {:ok, {providers, meta}} ->
        conn
        |> put_status(:ok)
        |> json(%{
          data: Enum.map(providers, &provider_json/1),
          meta: meta_json(meta)
        })

      {:error, _} ->
        conn |> put_status(:bad_request) |> json(%{error: "invalid parameters"})
    end
  end

  operation(:show,
    summary: "Get provider",
    parameters: [
      provider_id: [in: :path, type: :string, required: true]
    ],
    responses: [
      ok: {"Provider", "application/json", PS.ProviderResponse},
      not_found: {"Not found", "application/json", %OpenApiSpex.Schema{type: :object}}
    ]
  )

  def show(conn, %{"provider_id" => provider_id}) do
    case ProviderQueries.get_provider(provider_id) do
      {:ok, provider} ->
        conn |> put_status(:ok) |> json(%{data: provider_json(provider)})

      {:error, :not_found} ->
        conn |> put_status(:not_found) |> json(%{error: "not found"})
    end
  end

  operation(:create,
    summary: "Register provider",
    request_body: {"Provider data", "application/json", PS.RegisterProvider, required: true},
    responses: [
      created: {"Provider registered", "application/json", PS.ProviderResponse}
    ]
  )

  def create(conn, params) do
    provider_id = params["provider_id"]

    command = %RegisterProvider{
      provider_id: provider_id,
      name: params["name"],
      email: params["email"],
      phone: params["phone"],
      contact_name: params["contact_name"],
      ruc: params["ruc"],
      address: params["address"]
    }

    case CommandedApp.dispatch(command, consistency: :strong) do
      :ok ->
        {:ok, provider} = ProviderQueries.get_provider(provider_id)
        conn |> put_status(:created) |> json(%{data: provider_json(provider)})

      {:error, reason} ->
        conn |> put_status(:unprocessable_entity) |> json(%{error: inspect(reason)})
    end
  end

  operation(:update,
    summary: "Update provider",
    parameters: [
      provider_id: [in: :path, type: :string, required: true]
    ],
    request_body: {"Provider data", "application/json", PS.UpdateProvider, required: true},
    responses: [
      ok: {"Provider updated", "application/json", PS.ProviderResponse}
    ]
  )

  def update(conn, %{"provider_id" => provider_id} = params) do
    command = %UpdateProvider{
      provider_id: provider_id,
      name: params["name"],
      email: params["email"],
      phone: params["phone"],
      contact_name: params["contact_name"],
      ruc: params["ruc"],
      address: params["address"]
    }

    case CommandedApp.dispatch(command, consistency: :strong) do
      :ok ->
        {:ok, provider} = ProviderQueries.get_provider(provider_id)
        conn |> put_status(:ok) |> json(%{data: provider_json(provider)})

      {:error, reason} ->
        conn |> put_status(:unprocessable_entity) |> json(%{error: inspect(reason)})
    end
  end

  operation(:deactivate,
    summary: "Deactivate provider",
    parameters: [
      provider_id: [in: :path, type: :string, required: true]
    ],
    responses: [
      ok: {"Provider deactivated", "application/json", PS.ProviderResponse}
    ]
  )

  def deactivate(conn, %{"provider_id" => provider_id}) do
    command = %DeactivateProvider{
      provider_id: provider_id,
      deactivated_by: "system"
    }

    case CommandedApp.dispatch(command, consistency: :strong) do
      :ok ->
        {:ok, provider} = ProviderQueries.get_provider(provider_id)
        conn |> put_status(:ok) |> json(%{data: provider_json(provider)})

      {:error, reason} ->
        conn |> put_status(:unprocessable_entity) |> json(%{error: inspect(reason)})
    end
  end

  operation(:reactivate,
    summary: "Reactivate provider",
    parameters: [
      provider_id: [in: :path, type: :string, required: true]
    ],
    responses: [
      ok: {"Provider reactivated", "application/json", PS.ProviderResponse}
    ]
  )

  def reactivate(conn, %{"provider_id" => provider_id}) do
    command = %ReactivateProvider{
      provider_id: provider_id,
      reactivated_by: "system"
    }

    case CommandedApp.dispatch(command, consistency: :strong) do
      :ok ->
        {:ok, provider} = ProviderQueries.get_provider(provider_id)
        conn |> put_status(:ok) |> json(%{data: provider_json(provider)})

      {:error, reason} ->
        conn |> put_status(:unprocessable_entity) |> json(%{error: inspect(reason)})
    end
  end

  defp provider_json(p) do
    %{
      provider_id: p.provider_id,
      name: p.name,
      email: p.email,
      phone: p.phone,
      contact_name: p.contact_name,
      ruc: p.ruc,
      address: p.address,
      active: p.active,
      templates: p.templates,
      default_templates: p.default_templates
    }
  end

  defp meta_json(meta) do
    %{
      total_count: meta.total_count,
      total_pages: meta.total_pages,
      current_page: meta.current_page,
      page_size: meta.page_size,
      has_next: meta.has_next_page?,
      has_prev: meta.has_previous_page?
    }
  end
end