# Copyright 2017 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# NOTE: This class is auto generated by the swagger code generator program.
# https://github.com/swagger-api/swagger-codegen.git
# Do not edit the class manually.

defmodule GoogleApi.Calendar.V3.RequestBuilder do
  @moduledoc """
  Helper functions for building Tesla requests
  """

  @path_template_regex ~r/{(\+?[^}]+)}/i
  @successful_request_response 200..299

  defmodule DataWrapper do
    defstruct [:data]
  end

  @doc """
  Specify the request method when building a request

  ## Parameters

  - request (Map) - Collected request options
  - m (String) - Request method

  ## Returns

  Map
  """
  @spec method(map(), atom()) :: map()
  def method(request, m) do
    Map.put_new(request, :method, m)
  end

  @doc """
  Specify the request method when building a request

  ## Parameters

  - request (Map) - Collected request options
  - u (String) - Request URL

  ## Returns

  Map
  """
  @spec url(map(), String.t(), map()) :: map()
  def url(request, u, replacements) do
    url(request, replace_path_template_vars(u, replacements))
  end

  def url(request, u) do
    Map.put_new(request, :url, u)
  end

  def replace_path_template_vars(u, replacements) do
    Regex.replace(@path_template_regex, u, fn _, var -> replacement_value(var, replacements) end)
  end

  defp replacement_value("+" <> name, replacements) do
    URI.decode(replacement_value(name, replacements))
  end

  defp replacement_value(name, replacements) do
    Map.get(replacements, name, "")
  end

  @doc """
  Add optional parameters to the request

  ## Parameters

  - request (Map) - Collected request options
  - definitions (Map) - Map of parameter name to parameter location.
  - options (KeywordList) - The provided optional parameters

  ## Returns

  Map
  """
  @spec add_optional_params(map(), map(), keyword()) :: map()
  def add_optional_params(request, _, []), do: request

  def add_optional_params(request, definitions, [{key, value} | tail]) do
    case definitions do
      %{^key => location} ->
        request
        |> add_param(location, key, value)
        |> add_optional_params(definitions, tail)

      _ ->
        add_optional_params(request, definitions, tail)
    end
  end

  @doc """
  Add optional parameters to the request

  ## Parameters

  - request (Map) - Collected request options
  - location (atom) - Where to put the parameter
  - key (atom) - The name of the parameter
  - value (any) - The value of the parameter

  ## Returns

  Map
  """
  @spec add_param(map(), atom(), atom(), any()) :: map()
  def add_param(request, :body, :body, value), do: Map.put(request, :body, value)

  def add_param(request, :body, key, value) do
    request
    |> Map.put_new_lazy(:body, &Tesla.Multipart.new/0)
    |> Map.update!(
      :body,
      &Tesla.Multipart.add_field(
        &1,
        key,
        Poison.encode!(value),
        headers: [{:"Content-Type", "application/json"}]
      )
    )
  end

  def add_param(request, :file, name, path) do
    request
    |> Map.put_new_lazy(:body, &Tesla.Multipart.new/0)
    |> Map.update!(:body, &Tesla.Multipart.add_file(&1, path, name: name))
  end

  def add_param(request, :form, name, value) do
    Map.update(request, :body, %{name => value}, &Map.put(&1, name, value))
  end

  def add_param(request, location, key, value) do
    Map.update(request, location, [{key, value}], &(&1 ++ [{key, value}]))
  end

  @doc """
  Handle the response for a Tesla request

  ## Parameters

  - env (Tesla.Env) - The response object
  - struct (struct | false) - The shape of the struct to deserialize into. If false, returns the Tesla response.
  - opts (KeywordList) - [optional] Optional parameters
    - :dataWrapped (boolean()): If true, the remove the wrapping "data" field.

  ## Returns

  {:ok, struct} on success
  {:error, info} on failure
  """
  @spec decode(Tesla.Env.t(), struct() | false | nil, keyword()) ::
          {:ok, struct()} | {:error, Tesla.Env.t()}
  def decode(env, struct \\ nil, opts \\ [])

  def decode(%Tesla.Env{status: status} = env, _struct, _opts)
      when status not in @successful_request_response do
    {:error, env}
  end

  def decode(%Tesla.Env{} = env, false, _opts) do
    {:ok, env}
  end

  def decode(%Tesla.Env{body: nil}, _struct, _opts) do
    {:ok, nil}
  end

  def decode(%Tesla.Env{body: body}, struct, dataWrapped: true) do
    Poison.decode(body, as: %GoogleApi.Calendar.V3.RequestBuilder.DataWrapper{}, struct: struct)
    |> case do
      {:ok, %{data: data}} -> {:ok, data}
      error -> error
    end
  end

  def decode(%Tesla.Env{body: body}, struct, _opts) do
    Poison.decode(body, as: struct)
  end
end

defimpl Poison.Decoder, for: GoogleApi.Calendar.V3.RequestBuilder.DataWrapper do
  import GoogleApi.Calendar.V3.Deserializer

  def decode(value, options) do
    deserialize(value, :data, :struct, options[:struct], options)
  end
end