require 'rails_helper'
require_relative '../dummy_provider'

describe 'Chat Controller', type: :request do

  let(:topic) { Fabricate(:post).topic }
  let(:admin) { Fabricate(:admin) }
  let(:category) { Fabricate(:category) }
  let(:category2) { Fabricate(:category) }
  let(:tag) { Fabricate(:tag) }
  let(:channel) { DiscourseChat::Channel.create(provider: 'dummy') }

  include_context "dummy provider"
  include_context "validated dummy provider"

  before do
    SiteSetting.chat_integration_enabled = true
  end

  shared_examples 'admin constraints' do |action, route|
    context 'when user is not signed in' do
      it 'should raise the right error' do
        public_send(action, route)
        expect(response.status).to eq(404)
      end
    end

    context 'when user is not an admin' do
      it 'should raise the right error' do
        sign_in(Fabricate(:user))
        public_send(action, route)
        expect(response.status).to eq(404)
      end
    end
  end

  describe 'listing providers' do
    include_examples 'admin constraints', 'get', '/admin/plugins/chat/providers.json'

    context 'when signed in as an admin' do
      before do
        sign_in(admin)
      end

      it 'should return the right response' do
        get '/admin/plugins/chat/providers.json'

        expect(response.status).to eq(200)

        json = JSON.parse(response.body)

        expect(json['providers'].size).to eq(2)

        expect(json['providers'].find { |h| h['name'] == 'dummy' }).to eq(
          'name' => 'dummy',
          'id' => 'dummy',
          'channel_parameters' => []
        )
      end
    end
  end

  describe 'testing channels' do
    include_examples 'admin constraints', 'get', '/admin/plugins/chat/test.json'

    context 'when signed in as an admin' do
      before do
        sign_in(admin)
      end

      it 'should return the right response' do
        post '/admin/plugins/chat/test.json', params: {
          channel_id: channel.id, topic_id: topic.id
        }

        expect(response.status).to eq(200)

        JSON.parse(response.body)
      end

      it 'should fail for invalid channel' do
        post '/admin/plugins/chat/test.json', params: {
          channel_id: 999, topic_id: topic.id
        }

        expect(response.status).to eq(422)
      end
    end
  end

  describe 'viewing channels' do
    include_examples 'admin constraints', 'get', '/admin/plugins/chat/channels.json'

    context 'when signed in as an admin' do
      before do
        sign_in(admin)
      end

      it 'should return the right response' do
        rule = DiscourseChat::Rule.create(
          channel: channel,
          filter: 'follow',
          category_id: category.id,
          tags: [tag.name]
        )

        get '/admin/plugins/chat/channels.json', params: { provider: 'dummy' }

        expect(response.status).to eq(200)

        channels = JSON.parse(response.body)['channels']

        expect(channels.count).to eq(1)

        expect(channels.first).to eq(
          "id" => channel.id,
          "provider" => 'dummy',
          "data" => {},
          "error_key" => nil,
          "error_info" => nil,
          "rules" => [{ "id" => rule.id, "type" => 'normal', "group_name" => nil, "group_id" => nil, "filter" => "follow", "channel_id" => channel.id, "category_id" => category.id, "tags" => [tag.name] }]
        )
      end

      it 'should fail for invalid provider' do
        get '/admin/plugins/chat/channels.json', params: { provider: 'someprovider' }
        expect(response.status).to eq(400)
      end

    end
  end

  describe 'adding a channel' do
    include_examples 'admin constraints', 'post', '/admin/plugins/chat/channels.json'

    context 'as an admin' do

      before do
        sign_in(admin)
      end

      it 'should be able to add a new channel' do
        post '/admin/plugins/chat/channels.json', params: {
          channel: {
            provider: 'dummy',
            data: {}
          }
        }

        expect(response.status).to eq(200)

        channel = DiscourseChat::Channel.all.last

        expect(channel.provider).to eq('dummy')
      end

      it 'should fail for invalid params' do
        post '/admin/plugins/chat/channels.json', params: {
          channel: {
            provider: 'dummy2',
            data: { val: 'something with whitespace' }
          }
        }

        expect(response.status).to eq(422)
      end
    end
  end

  describe 'updating a channel' do
    let(:channel) { DiscourseChat::Channel.create(provider: 'dummy2', data: { val: "something" }) }

    include_examples 'admin constraints', 'put', "/admin/plugins/chat/channels/1.json"

    context 'as an admin' do

      before do
        sign_in(admin)
      end

      it 'should be able update a channel' do
        put "/admin/plugins/chat/channels/#{channel.id}.json", params: {
          channel: {
            data: { val: "something-else" }
          }
        }

        expect(response.status).to eq(200)

        channel = DiscourseChat::Channel.all.last
        expect(channel.data).to eq("val" => "something-else")
      end

      it 'should fail for invalid params' do
        put "/admin/plugins/chat/channels/#{channel.id}.json", params: {
          channel: {
            data: { val: "something with whitespace" }
          }
        }

        expect(response.status).to eq(422)
      end
    end
  end

  describe 'deleting a channel' do
    let(:channel) { DiscourseChat::Channel.create(provider: 'dummy', data: {}) }

    include_examples 'admin constraints', 'delete', "/admin/plugins/chat/channels/1.json"

    context 'as an admin' do

      before do
        sign_in(admin)
      end

      it 'should be able delete a channel' do
        delete "/admin/plugins/chat/channels/#{channel.id}.json"

        expect(response.status).to eq(200)
        expect(DiscourseChat::Channel.all.size).to eq(0)
      end
    end
  end

  describe 'adding a rule' do
    include_examples 'admin constraints', 'put', '/admin/plugins/chat/rules.json'

    context 'as an admin' do

      before do
        sign_in(admin)
      end

      it 'should be able to add a new rule' do
        post '/admin/plugins/chat/rules.json', params: {
          rule: {
            channel_id: channel.id,
            category_id: category.id,
            filter: 'watch',
            tags: [tag.name]
          }
        }

        expect(response.status).to eq(200)

        rule = DiscourseChat::Rule.all.last

        expect(rule.channel_id).to eq(channel.id)
        expect(rule.category_id).to eq(category.id)
        expect(rule.filter).to eq('watch')
        expect(rule.tags).to eq([tag.name])

      end

      it 'should fail for invalid params' do
        post '/admin/plugins/chat/rules.json', params: {
          rule: {
            channel_id: channel.id,
            category_id: category.id,
            filter: 'watch',
            tags: ['somenonexistanttag']
          }
        }

        expect(response.status).to eq(422)
      end
    end
  end

  describe 'updating a rule' do
    let(:rule) { DiscourseChat::Rule.create(channel: channel, filter: 'follow', category_id: category.id, tags: [tag.name]) }

    include_examples 'admin constraints', 'put', "/admin/plugins/chat/rules/1.json"

    context 'as an admin' do

      before do
        sign_in(admin)
      end

      it 'should be able update a rule' do
        put "/admin/plugins/chat/rules/#{rule.id}.json", params: {
          rule: {
            channel_id: channel.id,
            category_id: category2.id,
            filter: rule.filter,
            tags: rule.tags
          }
        }

        expect(response.status).to eq(200)

        rule = DiscourseChat::Rule.all.last
        expect(rule.category_id).to eq(category2.id)
      end

      it 'should fail for invalid params' do
        put "/admin/plugins/chat/rules/#{rule.id}.json", params: {
          rule: {
            channel_id: channel.id,
            category_id: category.id,
            filter: 'watch',
            tags: ['somenonexistanttag']
          }
        }

        expect(response.status).to eq(422)
      end
    end
  end

  describe 'deleting a rule' do
    let(:rule) do
      DiscourseChat::Rule.create!(
        channel_id: channel.id,
        filter: 'follow',
        category_id: category.id,
        tags: [tag.name]
      )
    end

    include_examples 'admin constraints', 'delete', "/admin/plugins/chat/rules/1.json"

    context 'as an admin' do

      before do
        sign_in(admin)
      end

      it 'should be able delete a rule' do
        delete "/admin/plugins/chat/rules/#{rule.id}.json"

        expect(response.status).to eq(200)
        expect(DiscourseChat::Rule.all.size).to eq(0)
      end
    end
  end

end