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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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require 'spec_helper'

describe 'client#explain' do
  let(:expected_args) do
    [
      method,
      url,
      params,
      body,
      {},
      { defined_params: { id: 1, index: 'foo' }, endpoint: 'explain' }
    ]
  end

  let(:method) { 'POST' }

  let(:params) do
    {}
  end

  let(:body) do
    {}
  end

  let(:url) do
    'foo/_explain/1'
  end

  let(:client) do
    Class.new { include Elasticsearch::API }.new
  end

  it 'requires the :index argument' do
    expect {
      client.explain(id: '1')
    }.to raise_exception(ArgumentError)
  end

  it 'requires the :id argument' do
    expect {
      client.explain(index: 'foo')
    }.to raise_exception(ArgumentError)
  end

  it 'performs the request' do
    expect(client_double.explain(index: 'foo', id: 1, body: {})).to be_a Elasticsearch::API::Response
  end

  context 'when a query is provided' do
    let(:method) { 'GET' }
    let(:params) do
      { q: 'abc123' }
    end

    let(:expected_args) do
      [
        method,
        url,
        params,
        body,
        {},
        { defined_params: { id: '1', index: 'foo' }, endpoint: 'explain' }
      ]
    end

    let(:body) do
      nil
    end

    it 'passes the query' do
      expect(client_double.explain(index: 'foo', id: '1', q: 'abc123')).to be_a Elasticsearch::API::Response
    end
  end

  context 'when a query definition is provided' do
    let(:body) do
      { query: { match: {} } }
    end

    let(:expected_args) do
      [
        method,
        url,
        params,
        body,
        {},
        { defined_params: { id: '1', index: 'foo' }, endpoint: 'explain' }
      ]
    end

    it 'passes the query definition' do
      expect(client_double.explain(index: 'foo', id: '1', body: { query: { match: {} } })).to be_a Elasticsearch::API::Response
    end
  end

  context 'when the request needs to be URL-escaped' do
    let(:url) do
      'foo%5Ebar/_explain/1'
    end

    let(:expected_args) do
      [
        method,
        url,
        params,
        body,
        {},
        { defined_params: { id: '1', index: 'foo^bar' }, endpoint: 'explain' }
      ]
    end

    it 'URL-escapes the parts' do
      expect(client_double.explain(index: 'foo^bar', id: '1', body: { })).to be_a Elasticsearch::API::Response
    end
  end
end
